+/*
+ * The backend-independent part of the reference module.
+ */
+
#include "cache.h"
+#include "config.h"
+#include "hashmap.h"
+#include "lockfile.h"
+#include "iterator.h"
#include "refs.h"
+#include "refs/refs-internal.h"
+#include "run-command.h"
+#include "object-store.h"
#include "object.h"
#include "tag.h"
-#include "dir.h"
-
-/* ISSYMREF=0x01, ISPACKED=0x02 and ISBROKEN=0x04 are public interfaces */
-#define REF_KNOWS_PEELED 0x10
-
-struct ref_entry {
- unsigned char flag; /* ISSYMREF? ISPACKED? */
- unsigned char sha1[20];
- unsigned char peeled[20];
- /* The full name of the reference (e.g., "refs/heads/master"): */
- char name[FLEX_ARRAY];
-};
-
-struct ref_array {
- int nr, alloc;
-
- /*
- * Entries with index 0 <= i < sorted are sorted by name. New
- * entries are appended to the list unsorted, and are sorted
- * only when required; thus we avoid the need to sort the list
- * after the addition of every reference.
- */
- int sorted;
-
- struct ref_entry **refs;
-};
+#include "submodule.h"
+#include "worktree.h"
+#include "strvec.h"
+#include "repository.h"
+#include "sigchain.h"
/*
- * Parse one line from a packed-refs file. Write the SHA1 to sha1.
- * Return a pointer to the refname within the line (null-terminated),
- * or NULL if there was a problem.
+ * List of all available backends
*/
-static const char *parse_ref_line(char *line, unsigned char *sha1)
-{
- /*
- * 42: the answer to everything.
- *
- * In this case, it happens to be the answer to
- * 40 (length of sha1 hex representation)
- * +1 (space in between hex and name)
- * +1 (newline at the end of the line)
- */
- int len = strlen(line) - 42;
+static struct ref_storage_be *refs_backends = &refs_be_files;
- if (len <= 0)
- return NULL;
- if (get_sha1_hex(line, sha1) < 0)
- return NULL;
- if (!isspace(line[40]))
- return NULL;
- line += 41;
- if (isspace(*line))
- return NULL;
- if (line[len] != '\n')
- return NULL;
- line[len] = 0;
-
- return line;
-}
-
-static struct ref_entry *create_ref_entry(const char *refname,
- const unsigned char *sha1, int flag,
- int check_name)
+static struct ref_storage_be *find_ref_storage_backend(const char *name)
{
- int len;
- struct ref_entry *ref;
-
- if (check_name &&
- check_refname_format(refname, REFNAME_ALLOW_ONELEVEL|REFNAME_DOT_COMPONENT))
- die("Reference has invalid format: '%s'", refname);
- len = strlen(refname) + 1;
- ref = xmalloc(sizeof(struct ref_entry) + len);
- hashcpy(ref->sha1, sha1);
- hashclr(ref->peeled);
- memcpy(ref->name, refname, len);
- ref->flag = flag;
- return ref;
-}
-
-/* Add a ref_entry to the end of the ref_array (unsorted). */
-static void add_ref(struct ref_array *refs, struct ref_entry *ref)
-{
- ALLOC_GROW(refs->refs, refs->nr + 1, refs->alloc);
- refs->refs[refs->nr++] = ref;
+ struct ref_storage_be *be;
+ for (be = refs_backends; be; be = be->next)
+ if (!strcmp(be->name, name))
+ return be;
+ return NULL;
}
-static int ref_entry_cmp(const void *a, const void *b)
+int ref_storage_backend_exists(const char *name)
{
- struct ref_entry *one = *(struct ref_entry **)a;
- struct ref_entry *two = *(struct ref_entry **)b;
- return strcmp(one->name, two->name);
+ return find_ref_storage_backend(name) != NULL;
}
/*
- * Emit a warning and return true iff ref1 and ref2 have the same name
- * and the same sha1. Die if they have the same name but different
- * sha1s.
+ * How to handle various characters in refnames:
+ * 0: An acceptable character for refs
+ * 1: End-of-component
+ * 2: ., look for a preceding . to reject .. in refs
+ * 3: {, look for a preceding @ to reject @{ in refs
+ * 4: A bad character: ASCII control characters, and
+ * ":", "?", "[", "\", "^", "~", SP, or TAB
+ * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set
*/
-static int is_dup_ref(const struct ref_entry *ref1, const struct ref_entry *ref2)
-{
- if (!strcmp(ref1->name, ref2->name)) {
- /* Duplicate name; make sure that the SHA1s match: */
- if (hashcmp(ref1->sha1, ref2->sha1))
- die("Duplicated ref, and SHA1s don't match: %s",
- ref1->name);
- warning("Duplicated ref: %s", ref1->name);
- return 1;
- } else {
- return 0;
- }
-}
+static unsigned char refname_disposition[256] = {
+ 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+ 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4
+};
/*
- * Sort the entries in array (if they are not already sorted).
+ * Try to read one refname component from the front of refname.
+ * Return the length of the component found, or -1 if the component is
+ * not legal. It is legal if it is something reasonable to have under
+ * ".git/refs/"; We do not like it if:
+ *
+ * - it begins with ".", or
+ * - it has double dots "..", or
+ * - it has ASCII control characters, or
+ * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or
+ * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or
+ * - it ends with a "/", or
+ * - it ends with ".lock", or
+ * - it contains a "@{" portion
+ *
+ * When sanitized is not NULL, instead of rejecting the input refname
+ * as an error, try to come up with a usable replacement for the input
+ * refname in it.
*/
-static void sort_ref_array(struct ref_array *array)
+static int check_refname_component(const char *refname, int *flags,
+ struct strbuf *sanitized)
{
- int i, j;
+ const char *cp;
+ char last = '\0';
+ size_t component_start = 0; /* garbage - not a reasonable initial value */
- /*
- * This check also prevents passing a zero-length array to qsort(),
- * which is a problem on some platforms.
- */
- if (array->sorted == array->nr)
- return;
+ if (sanitized)
+ component_start = sanitized->len;
+
+ for (cp = refname; ; cp++) {
+ int ch = *cp & 255;
+ unsigned char disp = refname_disposition[ch];
+
+ if (sanitized && disp != 1)
+ strbuf_addch(sanitized, ch);
+
+ switch (disp) {
+ case 1:
+ goto out;
+ case 2:
+ if (last == '.') { /* Refname contains "..". */
+ if (sanitized)
+ /* collapse ".." to single "." */
+ strbuf_setlen(sanitized, sanitized->len - 1);
+ else
+ return -1;
+ }
+ break;
+ case 3:
+ if (last == '@') { /* Refname contains "@{". */
+ if (sanitized)
+ sanitized->buf[sanitized->len-1] = '-';
+ else
+ return -1;
+ }
+ break;
+ case 4:
+ /* forbidden char */
+ if (sanitized)
+ sanitized->buf[sanitized->len-1] = '-';
+ else
+ return -1;
+ break;
+ case 5:
+ if (!(*flags & REFNAME_REFSPEC_PATTERN)) {
+ /* refspec can't be a pattern */
+ if (sanitized)
+ sanitized->buf[sanitized->len-1] = '-';
+ else
+ return -1;
+ }
- qsort(array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp);
+ /*
+ * Unset the pattern flag so that we only accept
+ * a single asterisk for one side of refspec.
+ */
+ *flags &= ~ REFNAME_REFSPEC_PATTERN;
+ break;
+ }
+ last = ch;
+ }
+out:
+ if (cp == refname)
+ return 0; /* Component has zero length. */
- /* Remove any duplicates from the ref_array */
- i = 0;
- for (j = 1; j < array->nr; j++) {
- if (is_dup_ref(array->refs[i], array->refs[j])) {
- free(array->refs[j]);
- continue;
+ if (refname[0] == '.') { /* Component starts with '.'. */
+ if (sanitized)
+ sanitized->buf[component_start] = '-';
+ else
+ return -1;
+ }
+ if (cp - refname >= LOCK_SUFFIX_LEN &&
+ !memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN)) {
+ if (!sanitized)
+ return -1;
+ /* Refname ends with ".lock". */
+ while (strbuf_strip_suffix(sanitized, LOCK_SUFFIX)) {
+ /* try again in case we have .lock.lock */
}
- array->refs[++i] = array->refs[j];
}
- array->sorted = array->nr = i + 1;
+ return cp - refname;
}
-static struct ref_entry *search_ref_array(struct ref_array *array, const char *refname)
+static int check_or_sanitize_refname(const char *refname, int flags,
+ struct strbuf *sanitized)
{
- struct ref_entry *e, **r;
- int len;
-
- if (refname == NULL)
- return NULL;
+ int component_len, component_count = 0;
- if (!array->nr)
- return NULL;
- sort_ref_array(array);
- len = strlen(refname) + 1;
- e = xmalloc(sizeof(struct ref_entry) + len);
- memcpy(e->name, refname, len);
+ if (!strcmp(refname, "@")) {
+ /* Refname is a single character '@'. */
+ if (sanitized)
+ strbuf_addch(sanitized, '-');
+ else
+ return -1;
+ }
- r = bsearch(&e, array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp);
+ while (1) {
+ if (sanitized && sanitized->len)
+ strbuf_complete(sanitized, '/');
- free(e);
+ /* We are at the start of a path component. */
+ component_len = check_refname_component(refname, &flags,
+ sanitized);
+ if (sanitized && component_len == 0)
+ ; /* OK, omit empty component */
+ else if (component_len <= 0)
+ return -1;
- if (r == NULL)
- return NULL;
+ component_count++;
+ if (refname[component_len] == '\0')
+ break;
+ /* Skip to next component. */
+ refname += component_len + 1;
+ }
- return *r;
+ if (refname[component_len - 1] == '.') {
+ /* Refname ends with '.'. */
+ if (sanitized)
+ ; /* omit ending dot */
+ else
+ return -1;
+ }
+ if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2)
+ return -1; /* Refname has only one component. */
+ return 0;
}
-/*
- * Future: need to be in "struct repository"
- * when doing a full libification.
- */
-static struct ref_cache {
- struct ref_cache *next;
- char did_loose;
- char did_packed;
- struct ref_array loose;
- struct ref_array packed;
- /* The submodule name, or "" for the main repo. */
- char name[FLEX_ARRAY];
-} *ref_cache;
-
-static struct ref_entry *current_ref;
-
-static void clear_ref_array(struct ref_array *array)
+int check_refname_format(const char *refname, int flags)
{
- int i;
- for (i = 0; i < array->nr; i++)
- free(array->refs[i]);
- free(array->refs);
- array->sorted = array->nr = array->alloc = 0;
- array->refs = NULL;
+ return check_or_sanitize_refname(refname, flags, NULL);
}
-static void clear_packed_ref_cache(struct ref_cache *refs)
+void sanitize_refname_component(const char *refname, struct strbuf *out)
{
- if (refs->did_packed)
- clear_ref_array(&refs->packed);
- refs->did_packed = 0;
+ if (check_or_sanitize_refname(refname, REFNAME_ALLOW_ONELEVEL, out))
+ BUG("sanitizing refname '%s' check returned error", refname);
}
-static void clear_loose_ref_cache(struct ref_cache *refs)
+int refname_is_safe(const char *refname)
{
- if (refs->did_loose)
- clear_ref_array(&refs->loose);
- refs->did_loose = 0;
-}
+ const char *rest;
-static struct ref_cache *create_ref_cache(const char *submodule)
-{
- int len;
- struct ref_cache *refs;
- if (!submodule)
- submodule = "";
- len = strlen(submodule) + 1;
- refs = xcalloc(1, sizeof(struct ref_cache) + len);
- memcpy(refs->name, submodule, len);
- return refs;
+ if (skip_prefix(refname, "refs/", &rest)) {
+ char *buf;
+ int result;
+ size_t restlen = strlen(rest);
+
+ /* rest must not be empty, or start or end with "/" */
+ if (!restlen || *rest == '/' || rest[restlen - 1] == '/')
+ return 0;
+
+ /*
+ * Does the refname try to escape refs/?
+ * For example: refs/foo/../bar is safe but refs/foo/../../bar
+ * is not.
+ */
+ buf = xmallocz(restlen);
+ result = !normalize_path_copy(buf, rest) && !strcmp(buf, rest);
+ free(buf);
+ return result;
+ }
+
+ do {
+ if (!isupper(*refname) && *refname != '_')
+ return 0;
+ refname++;
+ } while (*refname);
+ return 1;
}
/*
- * Return a pointer to a ref_cache for the specified submodule. For
- * the main repository, use submodule==NULL. The returned structure
- * will be allocated and initialized but not necessarily populated; it
- * should not be freed.
+ * Return true if refname, which has the specified oid and flags, can
+ * be resolved to an object in the database. If the referred-to object
+ * does not exist, emit a warning and return false.
*/
-static struct ref_cache *get_ref_cache(const char *submodule)
+int ref_resolves_to_object(const char *refname,
+ const struct object_id *oid,
+ unsigned int flags)
{
- struct ref_cache *refs = ref_cache;
- if (!submodule)
- submodule = "";
- while (refs) {
- if (!strcmp(submodule, refs->name))
- return refs;
- refs = refs->next;
+ if (flags & REF_ISBROKEN)
+ return 0;
+ if (!has_object_file(oid)) {
+ error(_("%s does not point to a valid object!"), refname);
+ return 0;
}
-
- refs = create_ref_cache(submodule);
- refs->next = ref_cache;
- ref_cache = refs;
- return refs;
+ return 1;
}
-void invalidate_ref_cache(const char *submodule)
+char *refs_resolve_refdup(struct ref_store *refs,
+ const char *refname, int resolve_flags,
+ struct object_id *oid, int *flags)
{
- struct ref_cache *refs = get_ref_cache(submodule);
- clear_packed_ref_cache(refs);
- clear_loose_ref_cache(refs);
+ const char *result;
+
+ result = refs_resolve_ref_unsafe(refs, refname, resolve_flags,
+ oid, flags);
+ return xstrdup_or_null(result);
}
-static void read_packed_refs(FILE *f, struct ref_array *array)
+char *resolve_refdup(const char *refname, int resolve_flags,
+ struct object_id *oid, int *flags)
{
- struct ref_entry *last = NULL;
- char refline[PATH_MAX];
- int flag = REF_ISPACKED;
-
- while (fgets(refline, sizeof(refline), f)) {
- unsigned char sha1[20];
- const char *refname;
- static const char header[] = "# pack-refs with:";
+ return refs_resolve_refdup(get_main_ref_store(the_repository),
+ refname, resolve_flags,
+ oid, flags);
+}
- if (!strncmp(refline, header, sizeof(header)-1)) {
- const char *traits = refline + sizeof(header) - 1;
- if (strstr(traits, " peeled "))
- flag |= REF_KNOWS_PEELED;
- /* perhaps other traits later as well */
- continue;
- }
+/* The argument to filter_refs */
+struct ref_filter {
+ const char *pattern;
+ const char *prefix;
+ each_ref_fn *fn;
+ void *cb_data;
+};
- refname = parse_ref_line(refline, sha1);
- if (refname) {
- last = create_ref_entry(refname, sha1, flag, 1);
- add_ref(array, last);
- continue;
- }
- if (last &&
- refline[0] == '^' &&
- strlen(refline) == 42 &&
- refline[41] == '\n' &&
- !get_sha1_hex(refline + 1, sha1))
- hashcpy(last->peeled, sha1);
- }
+int refs_read_ref_full(struct ref_store *refs, const char *refname,
+ int resolve_flags, struct object_id *oid, int *flags)
+{
+ if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, oid, flags))
+ return 0;
+ return -1;
}
-static struct ref_array *get_packed_refs(struct ref_cache *refs)
+int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags)
{
- if (!refs->did_packed) {
- const char *packed_refs_file;
- FILE *f;
+ return refs_read_ref_full(get_main_ref_store(the_repository), refname,
+ resolve_flags, oid, flags);
+}
- if (*refs->name)
- packed_refs_file = git_path_submodule(refs->name, "packed-refs");
- else
- packed_refs_file = git_path("packed-refs");
- f = fopen(packed_refs_file, "r");
- if (f) {
- read_packed_refs(f, &refs->packed);
- fclose(f);
- }
- refs->did_packed = 1;
- }
- return &refs->packed;
+int read_ref(const char *refname, struct object_id *oid)
+{
+ return read_ref_full(refname, RESOLVE_REF_READING, oid, NULL);
}
-void add_packed_ref(const char *refname, const unsigned char *sha1)
+int refs_ref_exists(struct ref_store *refs, const char *refname)
{
- add_ref(get_packed_refs(get_ref_cache(NULL)),
- create_ref_entry(refname, sha1, REF_ISPACKED, 1));
+ return !!refs_resolve_ref_unsafe(refs, refname, RESOLVE_REF_READING, NULL, NULL);
}
-static void get_ref_dir(struct ref_cache *refs, const char *base,
- struct ref_array *array)
+int ref_exists(const char *refname)
{
- DIR *dir;
- const char *path;
+ return refs_ref_exists(get_main_ref_store(the_repository), refname);
+}
- if (*refs->name)
- path = git_path_submodule(refs->name, "%s", base);
- else
- path = git_path("%s", base);
+static int filter_refs(const char *refname, const struct object_id *oid,
+ int flags, void *data)
+{
+ struct ref_filter *filter = (struct ref_filter *)data;
+ if (wildmatch(filter->pattern, refname, 0))
+ return 0;
+ if (filter->prefix)
+ skip_prefix(refname, filter->prefix, &refname);
+ return filter->fn(refname, oid, flags, filter->cb_data);
+}
- dir = opendir(path);
+enum peel_status peel_object(const struct object_id *name, struct object_id *oid)
+{
+ struct object *o = lookup_unknown_object(name);
- if (dir) {
- struct dirent *de;
- int baselen = strlen(base);
- char *refname = xmalloc(baselen + 257);
+ if (o->type == OBJ_NONE) {
+ int type = oid_object_info(the_repository, name, NULL);
+ if (type < 0 || !object_as_type(o, type, 0))
+ return PEEL_INVALID;
+ }
- memcpy(refname, base, baselen);
- if (baselen && base[baselen-1] != '/')
- refname[baselen++] = '/';
+ if (o->type != OBJ_TAG)
+ return PEEL_NON_TAG;
- while ((de = readdir(dir)) != NULL) {
- unsigned char sha1[20];
- struct stat st;
- int flag;
- int namelen;
- const char *refdir;
+ o = deref_tag_noverify(o);
+ if (!o)
+ return PEEL_INVALID;
- if (de->d_name[0] == '.')
- continue;
- namelen = strlen(de->d_name);
- if (namelen > 255)
- continue;
- if (has_extension(de->d_name, ".lock"))
- continue;
- memcpy(refname + baselen, de->d_name, namelen+1);
- refdir = *refs->name
- ? git_path_submodule(refs->name, "%s", refname)
- : git_path("%s", refname);
- if (stat(refdir, &st) < 0)
- continue;
- if (S_ISDIR(st.st_mode)) {
- get_ref_dir(refs, refname, array);
- continue;
- }
- if (*refs->name) {
- hashclr(sha1);
- flag = 0;
- if (resolve_gitlink_ref(refs->name, refname, sha1) < 0) {
- hashclr(sha1);
- flag |= REF_ISBROKEN;
- }
- } else if (read_ref_full(refname, sha1, 1, &flag)) {
- hashclr(sha1);
- flag |= REF_ISBROKEN;
- }
- add_ref(array, create_ref_entry(refname, sha1, flag, 1));
- }
- free(refname);
- closedir(dir);
- }
+ oidcpy(oid, &o->oid);
+ return PEEL_PEELED;
}
struct warn_if_dangling_data {
FILE *fp;
const char *refname;
+ const struct string_list *refnames;
const char *msg_fmt;
};
-static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1,
+static int warn_if_dangling_symref(const char *refname, const struct object_id *oid,
int flags, void *cb_data)
{
struct warn_if_dangling_data *d = cb_data;
const char *resolves_to;
- unsigned char junk[20];
if (!(flags & REF_ISSYMREF))
return 0;
- resolves_to = resolve_ref_unsafe(refname, junk, 0, NULL);
- if (!resolves_to || strcmp(resolves_to, d->refname))
+ resolves_to = resolve_ref_unsafe(refname, 0, NULL, NULL);
+ if (!resolves_to
+ || (d->refname
+ ? strcmp(resolves_to, d->refname)
+ : !string_list_has_string(d->refnames, resolves_to))) {
return 0;
+ }
fprintf(d->fp, d->msg_fmt, refname);
+ fputc('\n', d->fp);
return 0;
}
data.fp = fp;
data.refname = refname;
+ data.refnames = NULL;
data.msg_fmt = msg_fmt;
for_each_rawref(warn_if_dangling_symref, &data);
}
-static struct ref_array *get_loose_refs(struct ref_cache *refs)
+void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames)
{
- if (!refs->did_loose) {
- get_ref_dir(refs, "refs", &refs->loose);
- refs->did_loose = 1;
- }
- return &refs->loose;
+ struct warn_if_dangling_data data;
+
+ data.fp = fp;
+ data.refname = NULL;
+ data.refnames = refnames;
+ data.msg_fmt = msg_fmt;
+ for_each_rawref(warn_if_dangling_symref, &data);
}
-/* We allow "recursive" symbolic refs. Only within reason, though */
-#define MAXDEPTH 5
-#define MAXREFLEN (1024)
+int refs_for_each_tag_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
+{
+ return refs_for_each_ref_in(refs, "refs/tags/", fn, cb_data);
+}
-/*
- * Called by resolve_gitlink_ref_recursive() after it failed to read
- * from the loose refs in ref_cache refs. Find <refname> in the
- * packed-refs file for the submodule.
- */
-static int resolve_gitlink_packed_ref(struct ref_cache *refs,
- const char *refname, unsigned char *sha1)
+int for_each_tag_ref(each_ref_fn fn, void *cb_data)
{
- struct ref_entry *ref;
- struct ref_array *array = get_packed_refs(refs);
+ return refs_for_each_tag_ref(get_main_ref_store(the_repository), fn, cb_data);
+}
- ref = search_ref_array(array, refname);
- if (ref == NULL)
- return -1;
+int refs_for_each_branch_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
+{
+ return refs_for_each_ref_in(refs, "refs/heads/", fn, cb_data);
+}
- memcpy(sha1, ref->sha1, 20);
- return 0;
+int for_each_branch_ref(each_ref_fn fn, void *cb_data)
+{
+ return refs_for_each_branch_ref(get_main_ref_store(the_repository), fn, cb_data);
}
-static int resolve_gitlink_ref_recursive(struct ref_cache *refs,
- const char *refname, unsigned char *sha1,
- int recursion)
+int refs_for_each_remote_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
- int fd, len;
- char buffer[128], *p;
- char *path;
+ return refs_for_each_ref_in(refs, "refs/remotes/", fn, cb_data);
+}
- if (recursion > MAXDEPTH || strlen(refname) > MAXREFLEN)
- return -1;
- path = *refs->name
- ? git_path_submodule(refs->name, "%s", refname)
- : git_path("%s", refname);
- fd = open(path, O_RDONLY);
- if (fd < 0)
- return resolve_gitlink_packed_ref(refs, refname, sha1);
-
- len = read(fd, buffer, sizeof(buffer)-1);
- close(fd);
- if (len < 0)
- return -1;
- while (len && isspace(buffer[len-1]))
- len--;
- buffer[len] = 0;
+int for_each_remote_ref(each_ref_fn fn, void *cb_data)
+{
+ return refs_for_each_remote_ref(get_main_ref_store(the_repository), fn, cb_data);
+}
- /* Was it a detached head or an old-fashioned symlink? */
- if (!get_sha1_hex(buffer, sha1))
- return 0;
+int head_ref_namespaced(each_ref_fn fn, void *cb_data)
+{
+ struct strbuf buf = STRBUF_INIT;
+ int ret = 0;
+ struct object_id oid;
+ int flag;
- /* Symref? */
- if (strncmp(buffer, "ref:", 4))
- return -1;
- p = buffer + 4;
- while (isspace(*p))
- p++;
+ strbuf_addf(&buf, "%sHEAD", get_git_namespace());
+ if (!read_ref_full(buf.buf, RESOLVE_REF_READING, &oid, &flag))
+ ret = fn(buf.buf, &oid, flag, cb_data);
+ strbuf_release(&buf);
- return resolve_gitlink_ref_recursive(refs, p, sha1, recursion+1);
+ return ret;
}
-int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1)
+void normalize_glob_ref(struct string_list_item *item, const char *prefix,
+ const char *pattern)
{
- int len = strlen(path), retval;
- char *submodule;
- struct ref_cache *refs;
+ struct strbuf normalized_pattern = STRBUF_INIT;
- while (len && path[len-1] == '/')
- len--;
- if (!len)
- return -1;
- submodule = xstrndup(path, len);
- refs = get_ref_cache(submodule);
- free(submodule);
+ if (*pattern == '/')
+ BUG("pattern must not start with '/'");
- retval = resolve_gitlink_ref_recursive(refs, refname, sha1, 0);
- return retval;
+ if (prefix) {
+ strbuf_addstr(&normalized_pattern, prefix);
+ }
+ else if (!starts_with(pattern, "refs/"))
+ strbuf_addstr(&normalized_pattern, "refs/");
+ strbuf_addstr(&normalized_pattern, pattern);
+ strbuf_strip_suffix(&normalized_pattern, "/");
+
+ item->string = strbuf_detach(&normalized_pattern, NULL);
+ item->util = has_glob_specials(pattern) ? NULL : item->string;
+ strbuf_release(&normalized_pattern);
}
-/*
- * Try to read ref from the packed references. On success, set sha1
- * and return 0; otherwise, return -1.
- */
-static int get_packed_ref(const char *refname, unsigned char *sha1)
+int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
+ const char *prefix, void *cb_data)
{
- struct ref_array *packed = get_packed_refs(get_ref_cache(NULL));
- struct ref_entry *entry = search_ref_array(packed, refname);
- if (entry) {
- hashcpy(sha1, entry->sha1);
- return 0;
+ struct strbuf real_pattern = STRBUF_INIT;
+ struct ref_filter filter;
+ int ret;
+
+ if (!prefix && !starts_with(pattern, "refs/"))
+ strbuf_addstr(&real_pattern, "refs/");
+ else if (prefix)
+ strbuf_addstr(&real_pattern, prefix);
+ strbuf_addstr(&real_pattern, pattern);
+
+ if (!has_glob_specials(pattern)) {
+ /* Append implied '/' '*' if not present. */
+ strbuf_complete(&real_pattern, '/');
+ /* No need to check for '*', there is none. */
+ strbuf_addch(&real_pattern, '*');
}
- return -1;
+
+ filter.pattern = real_pattern.buf;
+ filter.prefix = prefix;
+ filter.fn = fn;
+ filter.cb_data = cb_data;
+ ret = for_each_ref(filter_refs, &filter);
+
+ strbuf_release(&real_pattern);
+ return ret;
}
-const char *resolve_ref_unsafe(const char *refname, unsigned char *sha1, int reading, int *flag)
+int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data)
{
- int depth = MAXDEPTH;
- ssize_t len;
- char buffer[256];
- static char refname_buffer[256];
+ return for_each_glob_ref_in(fn, pattern, NULL, cb_data);
+}
- if (flag)
- *flag = 0;
+const char *prettify_refname(const char *name)
+{
+ if (skip_prefix(name, "refs/heads/", &name) ||
+ skip_prefix(name, "refs/tags/", &name) ||
+ skip_prefix(name, "refs/remotes/", &name))
+ ; /* nothing */
+ return name;
+}
- if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL))
- return NULL;
+static const char *ref_rev_parse_rules[] = {
+ "%.*s",
+ "refs/%.*s",
+ "refs/tags/%.*s",
+ "refs/heads/%.*s",
+ "refs/remotes/%.*s",
+ "refs/remotes/%.*s/HEAD",
+ NULL
+};
- for (;;) {
- char path[PATH_MAX];
- struct stat st;
- char *buf;
- int fd;
+#define NUM_REV_PARSE_RULES (ARRAY_SIZE(ref_rev_parse_rules) - 1)
- if (--depth < 0)
- return NULL;
+/*
+ * Is it possible that the caller meant full_name with abbrev_name?
+ * If so return a non-zero value to signal "yes"; the magnitude of
+ * the returned value gives the precedence used for disambiguation.
+ *
+ * If abbrev_name cannot mean full_name, return 0.
+ */
+int refname_match(const char *abbrev_name, const char *full_name)
+{
+ const char **p;
+ const int abbrev_name_len = strlen(abbrev_name);
+ const int num_rules = NUM_REV_PARSE_RULES;
- git_snpath(path, sizeof(path), "%s", refname);
+ for (p = ref_rev_parse_rules; *p; p++)
+ if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name)))
+ return &ref_rev_parse_rules[num_rules] - p;
- if (lstat(path, &st) < 0) {
- if (errno != ENOENT)
- return NULL;
- /*
- * The loose reference file does not exist;
- * check for a packed reference.
- */
- if (!get_packed_ref(refname, sha1)) {
- if (flag)
- *flag |= REF_ISPACKED;
- return refname;
- }
- /* The reference is not a packed reference, either. */
- if (reading) {
- return NULL;
- } else {
- hashclr(sha1);
- return refname;
- }
- }
+ return 0;
+}
- /* Follow "normalized" - ie "refs/.." symlinks by hand */
- if (S_ISLNK(st.st_mode)) {
- len = readlink(path, buffer, sizeof(buffer)-1);
- if (len < 0)
- return NULL;
- buffer[len] = 0;
- if (!prefixcmp(buffer, "refs/") &&
- !check_refname_format(buffer, 0)) {
- strcpy(refname_buffer, buffer);
- refname = refname_buffer;
- if (flag)
- *flag |= REF_ISSYMREF;
- continue;
- }
+/*
+ * Given a 'prefix' expand it by the rules in 'ref_rev_parse_rules' and add
+ * the results to 'prefixes'
+ */
+void expand_ref_prefix(struct strvec *prefixes, const char *prefix)
+{
+ const char **p;
+ int len = strlen(prefix);
+
+ for (p = ref_rev_parse_rules; *p; p++)
+ strvec_pushf(prefixes, *p, len, prefix);
+}
+
+static const char default_branch_name_advice[] = N_(
+"Using '%s' as the name for the initial branch. This default branch name\n"
+"is subject to change. To configure the initial branch name to use in all\n"
+"of your new repositories, which will suppress this warning, call:\n"
+"\n"
+"\tgit config --global init.defaultBranch <name>\n"
+"\n"
+"Names commonly chosen instead of 'master' are 'main', 'trunk' and\n"
+"'development'. The just-created branch can be renamed via this command:\n"
+"\n"
+"\tgit branch -m <name>\n"
+);
+
+char *repo_default_branch_name(struct repository *r, int quiet)
+{
+ const char *config_key = "init.defaultbranch";
+ const char *config_display_key = "init.defaultBranch";
+ char *ret = NULL, *full_ref;
+ const char *env = getenv("GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME");
+
+ if (env && *env)
+ ret = xstrdup(env);
+ else if (repo_config_get_string(r, config_key, &ret) < 0)
+ die(_("could not retrieve `%s`"), config_display_key);
+
+ if (!ret) {
+ ret = xstrdup("master");
+ if (!quiet)
+ advise(_(default_branch_name_advice), ret);
+ }
+
+ full_ref = xstrfmt("refs/heads/%s", ret);
+ if (check_refname_format(full_ref, 0))
+ die(_("invalid branch name: %s = %s"), config_display_key, ret);
+ free(full_ref);
+
+ return ret;
+}
+
+const char *git_default_branch_name(int quiet)
+{
+ static char *ret;
+
+ if (!ret)
+ ret = repo_default_branch_name(the_repository, quiet);
+
+ return ret;
+}
+
+/*
+ * *string and *len will only be substituted, and *string returned (for
+ * later free()ing) if the string passed in is a magic short-hand form
+ * to name a branch.
+ */
+static char *substitute_branch_name(struct repository *r,
+ const char **string, int *len,
+ int nonfatal_dangling_mark)
+{
+ struct strbuf buf = STRBUF_INIT;
+ struct interpret_branch_name_options options = {
+ .nonfatal_dangling_mark = nonfatal_dangling_mark
+ };
+ int ret = repo_interpret_branch_name(r, *string, *len, &buf, &options);
+
+ if (ret == *len) {
+ size_t size;
+ *string = strbuf_detach(&buf, &size);
+ *len = size;
+ return (char *)*string;
+ }
+
+ return NULL;
+}
+
+int repo_dwim_ref(struct repository *r, const char *str, int len,
+ struct object_id *oid, char **ref, int nonfatal_dangling_mark)
+{
+ char *last_branch = substitute_branch_name(r, &str, &len,
+ nonfatal_dangling_mark);
+ int refs_found = expand_ref(r, str, len, oid, ref);
+ free(last_branch);
+ return refs_found;
+}
+
+int expand_ref(struct repository *repo, const char *str, int len,
+ struct object_id *oid, char **ref)
+{
+ const char **p, *r;
+ int refs_found = 0;
+ struct strbuf fullref = STRBUF_INIT;
+
+ *ref = NULL;
+ for (p = ref_rev_parse_rules; *p; p++) {
+ struct object_id oid_from_ref;
+ struct object_id *this_result;
+ int flag;
+
+ this_result = refs_found ? &oid_from_ref : oid;
+ strbuf_reset(&fullref);
+ strbuf_addf(&fullref, *p, len, str);
+ r = refs_resolve_ref_unsafe(get_main_ref_store(repo),
+ fullref.buf, RESOLVE_REF_READING,
+ this_result, &flag);
+ if (r) {
+ if (!refs_found++)
+ *ref = xstrdup(r);
+ if (!warn_ambiguous_refs)
+ break;
+ } else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) {
+ warning(_("ignoring dangling symref %s"), fullref.buf);
+ } else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) {
+ warning(_("ignoring broken ref %s"), fullref.buf);
}
+ }
+ strbuf_release(&fullref);
+ return refs_found;
+}
- /* Is it a directory? */
- if (S_ISDIR(st.st_mode)) {
- errno = EISDIR;
- return NULL;
+int repo_dwim_log(struct repository *r, const char *str, int len,
+ struct object_id *oid, char **log)
+{
+ struct ref_store *refs = get_main_ref_store(r);
+ char *last_branch = substitute_branch_name(r, &str, &len, 0);
+ const char **p;
+ int logs_found = 0;
+ struct strbuf path = STRBUF_INIT;
+
+ *log = NULL;
+ for (p = ref_rev_parse_rules; *p; p++) {
+ struct object_id hash;
+ const char *ref, *it;
+
+ strbuf_reset(&path);
+ strbuf_addf(&path, *p, len, str);
+ ref = refs_resolve_ref_unsafe(refs, path.buf,
+ RESOLVE_REF_READING,
+ &hash, NULL);
+ if (!ref)
+ continue;
+ if (refs_reflog_exists(refs, path.buf))
+ it = path.buf;
+ else if (strcmp(ref, path.buf) &&
+ refs_reflog_exists(refs, ref))
+ it = ref;
+ else
+ continue;
+ if (!logs_found++) {
+ *log = xstrdup(it);
+ oidcpy(oid, &hash);
}
+ if (!warn_ambiguous_refs)
+ break;
+ }
+ strbuf_release(&path);
+ free(last_branch);
+ return logs_found;
+}
- /*
- * Anything else, just open it and try to use it as
- * a ref
- */
- fd = open(path, O_RDONLY);
- if (fd < 0)
- return NULL;
- len = read_in_full(fd, buffer, sizeof(buffer)-1);
- close(fd);
- if (len < 0)
- return NULL;
- while (len && isspace(buffer[len-1]))
- len--;
- buffer[len] = '\0';
+int dwim_log(const char *str, int len, struct object_id *oid, char **log)
+{
+ return repo_dwim_log(the_repository, str, len, oid, log);
+}
+
+static int is_per_worktree_ref(const char *refname)
+{
+ return starts_with(refname, "refs/worktree/") ||
+ starts_with(refname, "refs/bisect/") ||
+ starts_with(refname, "refs/rewritten/");
+}
+
+static int is_pseudoref_syntax(const char *refname)
+{
+ const char *c;
+
+ for (c = refname; *c; c++) {
+ if (!isupper(*c) && *c != '-' && *c != '_')
+ return 0;
+ }
+
+ return 1;
+}
+
+static int is_main_pseudoref_syntax(const char *refname)
+{
+ return skip_prefix(refname, "main-worktree/", &refname) &&
+ *refname &&
+ is_pseudoref_syntax(refname);
+}
+
+static int is_other_pseudoref_syntax(const char *refname)
+{
+ if (!skip_prefix(refname, "worktrees/", &refname))
+ return 0;
+ refname = strchr(refname, '/');
+ if (!refname || !refname[1])
+ return 0;
+ return is_pseudoref_syntax(refname + 1);
+}
+
+enum ref_type ref_type(const char *refname)
+{
+ if (is_per_worktree_ref(refname))
+ return REF_TYPE_PER_WORKTREE;
+ if (is_pseudoref_syntax(refname))
+ return REF_TYPE_PSEUDOREF;
+ if (is_main_pseudoref_syntax(refname))
+ return REF_TYPE_MAIN_PSEUDOREF;
+ if (is_other_pseudoref_syntax(refname))
+ return REF_TYPE_OTHER_PSEUDOREF;
+ return REF_TYPE_NORMAL;
+}
+
+long get_files_ref_lock_timeout_ms(void)
+{
+ static int configured = 0;
+
+ /* The default timeout is 100 ms: */
+ static int timeout_ms = 100;
+
+ if (!configured) {
+ git_config_get_int("core.filesreflocktimeout", &timeout_ms);
+ configured = 1;
+ }
+
+ return timeout_ms;
+}
+
+int refs_delete_ref(struct ref_store *refs, const char *msg,
+ const char *refname,
+ const struct object_id *old_oid,
+ unsigned int flags)
+{
+ struct ref_transaction *transaction;
+ struct strbuf err = STRBUF_INIT;
+
+ transaction = ref_store_transaction_begin(refs, &err);
+ if (!transaction ||
+ ref_transaction_delete(transaction, refname, old_oid,
+ flags, msg, &err) ||
+ ref_transaction_commit(transaction, &err)) {
+ error("%s", err.buf);
+ ref_transaction_free(transaction);
+ strbuf_release(&err);
+ return 1;
+ }
+ ref_transaction_free(transaction);
+ strbuf_release(&err);
+ return 0;
+}
+
+int delete_ref(const char *msg, const char *refname,
+ const struct object_id *old_oid, unsigned int flags)
+{
+ return refs_delete_ref(get_main_ref_store(the_repository), msg, refname,
+ old_oid, flags);
+}
+
+static void copy_reflog_msg(struct strbuf *sb, const char *msg)
+{
+ char c;
+ int wasspace = 1;
+ while ((c = *msg++)) {
+ if (wasspace && isspace(c))
+ continue;
+ wasspace = isspace(c);
+ if (wasspace)
+ c = ' ';
+ strbuf_addch(sb, c);
+ }
+ strbuf_rtrim(sb);
+}
+
+static char *normalize_reflog_message(const char *msg)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ if (msg && *msg)
+ copy_reflog_msg(&sb, msg);
+ return strbuf_detach(&sb, NULL);
+}
+
+int should_autocreate_reflog(const char *refname)
+{
+ switch (log_all_ref_updates) {
+ case LOG_REFS_ALWAYS:
+ return 1;
+ case LOG_REFS_NORMAL:
+ return starts_with(refname, "refs/heads/") ||
+ starts_with(refname, "refs/remotes/") ||
+ starts_with(refname, "refs/notes/") ||
+ !strcmp(refname, "HEAD");
+ default:
+ return 0;
+ }
+}
+
+int is_branch(const char *refname)
+{
+ return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/");
+}
+
+struct read_ref_at_cb {
+ const char *refname;
+ timestamp_t at_time;
+ int cnt;
+ int reccnt;
+ struct object_id *oid;
+ int found_it;
+
+ struct object_id ooid;
+ struct object_id noid;
+ int tz;
+ timestamp_t date;
+ char **msg;
+ timestamp_t *cutoff_time;
+ int *cutoff_tz;
+ int *cutoff_cnt;
+};
+
+static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid,
+ const char *email, timestamp_t timestamp, int tz,
+ const char *message, void *cb_data)
+{
+ struct read_ref_at_cb *cb = cb_data;
+
+ cb->reccnt++;
+ cb->tz = tz;
+ cb->date = timestamp;
+
+ if (timestamp <= cb->at_time || cb->cnt == 0) {
+ if (cb->msg)
+ *cb->msg = xstrdup(message);
+ if (cb->cutoff_time)
+ *cb->cutoff_time = timestamp;
+ if (cb->cutoff_tz)
+ *cb->cutoff_tz = tz;
+ if (cb->cutoff_cnt)
+ *cb->cutoff_cnt = cb->reccnt - 1;
/*
- * Is it a symbolic ref?
+ * we have not yet updated cb->[n|o]oid so they still
+ * hold the values for the previous record.
*/
- if (prefixcmp(buffer, "ref:"))
- break;
- if (flag)
- *flag |= REF_ISSYMREF;
- buf = buffer + 4;
- while (isspace(*buf))
- buf++;
- if (check_refname_format(buf, REFNAME_ALLOW_ONELEVEL)) {
- if (flag)
- *flag |= REF_ISBROKEN;
- return NULL;
+ if (!is_null_oid(&cb->ooid)) {
+ oidcpy(cb->oid, noid);
+ if (!oideq(&cb->ooid, noid))
+ warning(_("log for ref %s has gap after %s"),
+ cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822)));
}
- refname = strcpy(refname_buffer, buf);
+ else if (cb->date == cb->at_time)
+ oidcpy(cb->oid, noid);
+ else if (!oideq(noid, cb->oid))
+ warning(_("log for ref %s unexpectedly ended on %s"),
+ cb->refname, show_date(cb->date, cb->tz,
+ DATE_MODE(RFC2822)));
+ oidcpy(&cb->ooid, ooid);
+ oidcpy(&cb->noid, noid);
+ cb->found_it = 1;
+ return 1;
}
- /* Please note that FETCH_HEAD has a second line containing other data. */
- if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) {
- if (flag)
- *flag |= REF_ISBROKEN;
- return NULL;
+ oidcpy(&cb->ooid, ooid);
+ oidcpy(&cb->noid, noid);
+ if (cb->cnt > 0)
+ cb->cnt--;
+ return 0;
+}
+
+static int read_ref_at_ent_oldest(struct object_id *ooid, struct object_id *noid,
+ const char *email, timestamp_t timestamp,
+ int tz, const char *message, void *cb_data)
+{
+ struct read_ref_at_cb *cb = cb_data;
+
+ if (cb->msg)
+ *cb->msg = xstrdup(message);
+ if (cb->cutoff_time)
+ *cb->cutoff_time = timestamp;
+ if (cb->cutoff_tz)
+ *cb->cutoff_tz = tz;
+ if (cb->cutoff_cnt)
+ *cb->cutoff_cnt = cb->reccnt;
+ oidcpy(cb->oid, ooid);
+ if (is_null_oid(cb->oid))
+ oidcpy(cb->oid, noid);
+ /* We just want the first entry */
+ return 1;
+}
+
+int read_ref_at(struct ref_store *refs, const char *refname,
+ unsigned int flags, timestamp_t at_time, int cnt,
+ struct object_id *oid, char **msg,
+ timestamp_t *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
+{
+ struct read_ref_at_cb cb;
+
+ memset(&cb, 0, sizeof(cb));
+ cb.refname = refname;
+ cb.at_time = at_time;
+ cb.cnt = cnt;
+ cb.msg = msg;
+ cb.cutoff_time = cutoff_time;
+ cb.cutoff_tz = cutoff_tz;
+ cb.cutoff_cnt = cutoff_cnt;
+ cb.oid = oid;
+
+ refs_for_each_reflog_ent_reverse(refs, refname, read_ref_at_ent, &cb);
+
+ if (!cb.reccnt) {
+ if (flags & GET_OID_QUIETLY)
+ exit(128);
+ else
+ die(_("log for %s is empty"), refname);
}
- return refname;
+ if (cb.found_it)
+ return 0;
+
+ refs_for_each_reflog_ent(refs, refname, read_ref_at_ent_oldest, &cb);
+
+ return 1;
}
-char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag)
+struct ref_transaction *ref_store_transaction_begin(struct ref_store *refs,
+ struct strbuf *err)
{
- const char *ret = resolve_ref_unsafe(ref, sha1, reading, flag);
- return ret ? xstrdup(ret) : NULL;
+ struct ref_transaction *tr;
+ assert(err);
+
+ tr = xcalloc(1, sizeof(struct ref_transaction));
+ tr->ref_store = refs;
+ return tr;
}
-/* The argument to filter_refs */
-struct ref_filter {
- const char *pattern;
- each_ref_fn *fn;
- void *cb_data;
-};
+struct ref_transaction *ref_transaction_begin(struct strbuf *err)
+{
+ return ref_store_transaction_begin(get_main_ref_store(the_repository), err);
+}
-int read_ref_full(const char *refname, unsigned char *sha1, int reading, int *flags)
+void ref_transaction_free(struct ref_transaction *transaction)
{
- if (resolve_ref_unsafe(refname, sha1, reading, flags))
- return 0;
- return -1;
+ size_t i;
+
+ if (!transaction)
+ return;
+
+ switch (transaction->state) {
+ case REF_TRANSACTION_OPEN:
+ case REF_TRANSACTION_CLOSED:
+ /* OK */
+ break;
+ case REF_TRANSACTION_PREPARED:
+ BUG("free called on a prepared reference transaction");
+ break;
+ default:
+ BUG("unexpected reference transaction state");
+ break;
+ }
+
+ for (i = 0; i < transaction->nr; i++) {
+ free(transaction->updates[i]->msg);
+ free(transaction->updates[i]);
+ }
+ free(transaction->updates);
+ free(transaction);
}
-int read_ref(const char *refname, unsigned char *sha1)
+struct ref_update *ref_transaction_add_update(
+ struct ref_transaction *transaction,
+ const char *refname, unsigned int flags,
+ const struct object_id *new_oid,
+ const struct object_id *old_oid,
+ const char *msg)
{
- return read_ref_full(refname, sha1, 1, NULL);
+ struct ref_update *update;
+
+ if (transaction->state != REF_TRANSACTION_OPEN)
+ BUG("update called for transaction that is not open");
+
+ FLEX_ALLOC_STR(update, refname, refname);
+ ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc);
+ transaction->updates[transaction->nr++] = update;
+
+ update->flags = flags;
+
+ if (flags & REF_HAVE_NEW)
+ oidcpy(&update->new_oid, new_oid);
+ if (flags & REF_HAVE_OLD)
+ oidcpy(&update->old_oid, old_oid);
+ update->msg = normalize_reflog_message(msg);
+ return update;
}
-#define DO_FOR_EACH_INCLUDE_BROKEN 01
-static int do_one_ref(const char *base, each_ref_fn fn, int trim,
- int flags, void *cb_data, struct ref_entry *entry)
+int ref_transaction_update(struct ref_transaction *transaction,
+ const char *refname,
+ const struct object_id *new_oid,
+ const struct object_id *old_oid,
+ unsigned int flags, const char *msg,
+ struct strbuf *err)
{
- if (prefixcmp(entry->name, base))
- return 0;
+ assert(err);
- if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) {
- if (entry->flag & REF_ISBROKEN)
- return 0; /* ignore broken refs e.g. dangling symref */
- if (!has_sha1_file(entry->sha1)) {
- error("%s does not point to a valid object!", entry->name);
- return 0;
+ if ((new_oid && !is_null_oid(new_oid)) ?
+ check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) :
+ !refname_is_safe(refname)) {
+ strbuf_addf(err, _("refusing to update ref with bad name '%s'"),
+ refname);
+ return -1;
+ }
+
+ if (flags & ~REF_TRANSACTION_UPDATE_ALLOWED_FLAGS)
+ BUG("illegal flags 0x%x passed to ref_transaction_update()", flags);
+
+ flags |= (new_oid ? REF_HAVE_NEW : 0) | (old_oid ? REF_HAVE_OLD : 0);
+
+ ref_transaction_add_update(transaction, refname, flags,
+ new_oid, old_oid, msg);
+ return 0;
+}
+
+int ref_transaction_create(struct ref_transaction *transaction,
+ const char *refname,
+ const struct object_id *new_oid,
+ unsigned int flags, const char *msg,
+ struct strbuf *err)
+{
+ if (!new_oid || is_null_oid(new_oid))
+ BUG("create called without valid new_oid");
+ return ref_transaction_update(transaction, refname, new_oid,
+ &null_oid, flags, msg, err);
+}
+
+int ref_transaction_delete(struct ref_transaction *transaction,
+ const char *refname,
+ const struct object_id *old_oid,
+ unsigned int flags, const char *msg,
+ struct strbuf *err)
+{
+ if (old_oid && is_null_oid(old_oid))
+ BUG("delete called with old_oid set to zeros");
+ return ref_transaction_update(transaction, refname,
+ &null_oid, old_oid,
+ flags, msg, err);
+}
+
+int ref_transaction_verify(struct ref_transaction *transaction,
+ const char *refname,
+ const struct object_id *old_oid,
+ unsigned int flags,
+ struct strbuf *err)
+{
+ if (!old_oid)
+ BUG("verify called with old_oid set to NULL");
+ return ref_transaction_update(transaction, refname,
+ NULL, old_oid,
+ flags, NULL, err);
+}
+
+int refs_update_ref(struct ref_store *refs, const char *msg,
+ const char *refname, const struct object_id *new_oid,
+ const struct object_id *old_oid, unsigned int flags,
+ enum action_on_err onerr)
+{
+ struct ref_transaction *t = NULL;
+ struct strbuf err = STRBUF_INIT;
+ int ret = 0;
+
+ t = ref_store_transaction_begin(refs, &err);
+ if (!t ||
+ ref_transaction_update(t, refname, new_oid, old_oid, flags, msg,
+ &err) ||
+ ref_transaction_commit(t, &err)) {
+ ret = 1;
+ ref_transaction_free(t);
+ }
+ if (ret) {
+ const char *str = _("update_ref failed for ref '%s': %s");
+
+ switch (onerr) {
+ case UPDATE_REFS_MSG_ON_ERR:
+ error(str, refname, err.buf);
+ break;
+ case UPDATE_REFS_DIE_ON_ERR:
+ die(str, refname, err.buf);
+ break;
+ case UPDATE_REFS_QUIET_ON_ERR:
+ break;
}
+ strbuf_release(&err);
+ return 1;
}
- current_ref = entry;
- return fn(entry->name + trim, entry->sha1, entry->flag, cb_data);
+ strbuf_release(&err);
+ if (t)
+ ref_transaction_free(t);
+ return 0;
}
-static int filter_refs(const char *refname, const unsigned char *sha1, int flags,
- void *data)
+int update_ref(const char *msg, const char *refname,
+ const struct object_id *new_oid,
+ const struct object_id *old_oid,
+ unsigned int flags, enum action_on_err onerr)
{
- struct ref_filter *filter = (struct ref_filter *)data;
- if (fnmatch(filter->pattern, refname, 0))
- return 0;
- return filter->fn(refname, sha1, flags, filter->cb_data);
+ return refs_update_ref(get_main_ref_store(the_repository), msg, refname, new_oid,
+ old_oid, flags, onerr);
}
-int peel_ref(const char *refname, unsigned char *sha1)
+char *refs_shorten_unambiguous_ref(struct ref_store *refs,
+ const char *refname, int strict)
{
- int flag;
- unsigned char base[20];
- struct object *o;
+ int i;
+ static char **scanf_fmts;
+ static int nr_rules;
+ char *short_name;
+ struct strbuf resolved_buf = STRBUF_INIT;
- if (current_ref && (current_ref->name == refname
- || !strcmp(current_ref->name, refname))) {
- if (current_ref->flag & REF_KNOWS_PEELED) {
- hashcpy(sha1, current_ref->peeled);
- return 0;
+ if (!nr_rules) {
+ /*
+ * Pre-generate scanf formats from ref_rev_parse_rules[].
+ * Generate a format suitable for scanf from a
+ * ref_rev_parse_rules rule by interpolating "%s" at the
+ * location of the "%.*s".
+ */
+ size_t total_len = 0;
+ size_t offset = 0;
+
+ /* the rule list is NULL terminated, count them first */
+ for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++)
+ /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */
+ total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1;
+
+ scanf_fmts = xmalloc(st_add(st_mult(sizeof(char *), nr_rules), total_len));
+
+ offset = 0;
+ for (i = 0; i < nr_rules; i++) {
+ assert(offset < total_len);
+ scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset;
+ offset += xsnprintf(scanf_fmts[i], total_len - offset,
+ ref_rev_parse_rules[i], 2, "%s") + 1;
}
- hashcpy(base, current_ref->sha1);
- goto fallback;
}
- if (read_ref_full(refname, base, 1, &flag))
- return -1;
+ /* bail out if there are no rules */
+ if (!nr_rules)
+ return xstrdup(refname);
+
+ /* buffer for scanf result, at most refname must fit */
+ short_name = xstrdup(refname);
- if ((flag & REF_ISPACKED)) {
- struct ref_array *array = get_packed_refs(get_ref_cache(NULL));
- struct ref_entry *r = search_ref_array(array, refname);
+ /* skip first rule, it will always match */
+ for (i = nr_rules - 1; i > 0 ; --i) {
+ int j;
+ int rules_to_fail = i;
+ int short_name_len;
- if (r != NULL && r->flag & REF_KNOWS_PEELED) {
- hashcpy(sha1, r->peeled);
- return 0;
+ if (1 != sscanf(refname, scanf_fmts[i], short_name))
+ continue;
+
+ short_name_len = strlen(short_name);
+
+ /*
+ * in strict mode, all (except the matched one) rules
+ * must fail to resolve to a valid non-ambiguous ref
+ */
+ if (strict)
+ rules_to_fail = nr_rules;
+
+ /*
+ * check if the short name resolves to a valid ref,
+ * but use only rules prior to the matched one
+ */
+ for (j = 0; j < rules_to_fail; j++) {
+ const char *rule = ref_rev_parse_rules[j];
+
+ /* skip matched rule */
+ if (i == j)
+ continue;
+
+ /*
+ * the short name is ambiguous, if it resolves
+ * (with this previous rule) to a valid ref
+ * read_ref() returns 0 on success
+ */
+ strbuf_reset(&resolved_buf);
+ strbuf_addf(&resolved_buf, rule,
+ short_name_len, short_name);
+ if (refs_ref_exists(refs, resolved_buf.buf))
+ break;
+ }
+
+ /*
+ * short name is non-ambiguous if all previous rules
+ * haven't resolved to a valid ref
+ */
+ if (j == rules_to_fail) {
+ strbuf_release(&resolved_buf);
+ return short_name;
}
}
-fallback:
- o = parse_object(base);
- if (o && o->type == OBJ_TAG) {
- o = deref_tag(o, refname, 0);
- if (o) {
- hashcpy(sha1, o->sha1);
- return 0;
+ strbuf_release(&resolved_buf);
+ free(short_name);
+ return xstrdup(refname);
+}
+
+char *shorten_unambiguous_ref(const char *refname, int strict)
+{
+ return refs_shorten_unambiguous_ref(get_main_ref_store(the_repository),
+ refname, strict);
+}
+
+static struct string_list *hide_refs;
+
+int parse_hide_refs_config(const char *var, const char *value, const char *section)
+{
+ const char *key;
+ if (!strcmp("transfer.hiderefs", var) ||
+ (!parse_config_key(var, section, NULL, NULL, &key) &&
+ !strcmp(key, "hiderefs"))) {
+ char *ref;
+ int len;
+
+ if (!value)
+ return config_error_nonbool(var);
+ ref = xstrdup(value);
+ len = strlen(ref);
+ while (len && ref[len - 1] == '/')
+ ref[--len] = '\0';
+ if (!hide_refs) {
+ hide_refs = xcalloc(1, sizeof(*hide_refs));
+ hide_refs->strdup_strings = 1;
}
+ string_list_append(hide_refs, ref);
}
- return -1;
+ return 0;
}
-static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn,
- int trim, int flags, void *cb_data)
+int ref_is_hidden(const char *refname, const char *refname_full)
{
- int retval = 0, p = 0, l = 0;
- struct ref_cache *refs = get_ref_cache(submodule);
- struct ref_array *packed = get_packed_refs(refs);
- struct ref_array *loose = get_loose_refs(refs);
+ int i;
- sort_ref_array(packed);
- sort_ref_array(loose);
- while (p < packed->nr && l < loose->nr) {
- struct ref_entry *entry;
- int cmp = strcmp(packed->refs[p]->name, loose->refs[l]->name);
- if (!cmp) {
- p++;
- continue;
+ if (!hide_refs)
+ return 0;
+ for (i = hide_refs->nr - 1; i >= 0; i--) {
+ const char *match = hide_refs->items[i].string;
+ const char *subject;
+ int neg = 0;
+ const char *p;
+
+ if (*match == '!') {
+ neg = 1;
+ match++;
}
- if (cmp > 0) {
- entry = loose->refs[l++];
+
+ if (*match == '^') {
+ subject = refname_full;
+ match++;
} else {
- entry = packed->refs[p++];
+ subject = refname;
}
- retval = do_one_ref(base, fn, trim, flags, cb_data, entry);
- if (retval)
- goto end_each;
- }
- if (l < loose->nr) {
- p = l;
- packed = loose;
+ /* refname can be NULL when namespaces are used. */
+ if (subject &&
+ skip_prefix(subject, match, &p) &&
+ (!*p || *p == '/'))
+ return !neg;
}
+ return 0;
+}
+
+const char *find_descendant_ref(const char *dirname,
+ const struct string_list *extras,
+ const struct string_list *skip)
+{
+ int pos;
+
+ if (!extras)
+ return NULL;
+
+ /*
+ * Look at the place where dirname would be inserted into
+ * extras. If there is an entry at that position that starts
+ * with dirname (remember, dirname includes the trailing
+ * slash) and is not in skip, then we have a conflict.
+ */
+ for (pos = string_list_find_insert_index(extras, dirname, 0);
+ pos < extras->nr; pos++) {
+ const char *extra_refname = extras->items[pos].string;
- for (; p < packed->nr; p++) {
- retval = do_one_ref(base, fn, trim, flags, cb_data, packed->refs[p]);
- if (retval)
- goto end_each;
+ if (!starts_with(extra_refname, dirname))
+ break;
+
+ if (!skip || !string_list_has_string(skip, extra_refname))
+ return extra_refname;
}
+ return NULL;
+}
-end_each:
- current_ref = NULL;
- return retval;
+int refs_rename_ref_available(struct ref_store *refs,
+ const char *old_refname,
+ const char *new_refname)
+{
+ struct string_list skip = STRING_LIST_INIT_NODUP;
+ struct strbuf err = STRBUF_INIT;
+ int ok;
+
+ string_list_insert(&skip, old_refname);
+ ok = !refs_verify_refname_available(refs, new_refname,
+ NULL, &skip, &err);
+ if (!ok)
+ error("%s", err.buf);
+
+ string_list_clear(&skip, 0);
+ strbuf_release(&err);
+ return ok;
+}
+
+int refs_head_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
+{
+ struct object_id oid;
+ int flag;
+
+ if (!refs_read_ref_full(refs, "HEAD", RESOLVE_REF_READING,
+ &oid, &flag))
+ return fn("HEAD", &oid, flag, cb_data);
+
+ return 0;
+}
+
+int head_ref(each_ref_fn fn, void *cb_data)
+{
+ return refs_head_ref(get_main_ref_store(the_repository), fn, cb_data);
}
+struct ref_iterator *refs_ref_iterator_begin(
+ struct ref_store *refs,
+ const char *prefix, int trim, int flags)
+{
+ struct ref_iterator *iter;
+
+ if (ref_paranoia < 0)
+ ref_paranoia = git_env_bool("GIT_REF_PARANOIA", 0);
+ if (ref_paranoia)
+ flags |= DO_FOR_EACH_INCLUDE_BROKEN;
+
+ iter = refs->be->iterator_begin(refs, prefix, flags);
+
+ /*
+ * `iterator_begin()` already takes care of prefix, but we
+ * might need to do some trimming:
+ */
+ if (trim)
+ iter = prefix_ref_iterator_begin(iter, "", trim);
+
+ /* Sanity check for subclasses: */
+ if (!iter->ordered)
+ BUG("reference iterator is not ordered");
+
+ return iter;
+}
-static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data)
+/*
+ * Call fn for each reference in the specified submodule for which the
+ * refname begins with prefix. If trim is non-zero, then trim that
+ * many characters off the beginning of each refname before passing
+ * the refname to fn. flags can be DO_FOR_EACH_INCLUDE_BROKEN to
+ * include broken references in the iteration. If fn ever returns a
+ * non-zero value, stop the iteration and return that value;
+ * otherwise, return 0.
+ */
+static int do_for_each_repo_ref(struct repository *r, const char *prefix,
+ each_repo_ref_fn fn, int trim, int flags,
+ void *cb_data)
{
- unsigned char sha1[20];
- int flag;
-
- if (submodule) {
- if (resolve_gitlink_ref(submodule, "HEAD", sha1) == 0)
- return fn("HEAD", sha1, 0, cb_data);
+ struct ref_iterator *iter;
+ struct ref_store *refs = get_main_ref_store(r);
+ if (!refs)
return 0;
- }
- if (!read_ref_full("HEAD", sha1, 1, &flag))
- return fn("HEAD", sha1, flag, cb_data);
+ iter = refs_ref_iterator_begin(refs, prefix, trim, flags);
- return 0;
+ return do_for_each_repo_ref_iterator(r, iter, fn, cb_data);
}
-int head_ref(each_ref_fn fn, void *cb_data)
-{
- return do_head_ref(NULL, fn, cb_data);
-}
+struct do_for_each_ref_help {
+ each_ref_fn *fn;
+ void *cb_data;
+};
-int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
+static int do_for_each_ref_helper(struct repository *r,
+ const char *refname,
+ const struct object_id *oid,
+ int flags,
+ void *cb_data)
{
- return do_head_ref(submodule, fn, cb_data);
-}
+ struct do_for_each_ref_help *hp = cb_data;
-int for_each_ref(each_ref_fn fn, void *cb_data)
-{
- return do_for_each_ref(NULL, "", fn, 0, 0, cb_data);
+ return hp->fn(refname, oid, flags, hp->cb_data);
}
-int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
+static int do_for_each_ref(struct ref_store *refs, const char *prefix,
+ each_ref_fn fn, int trim, int flags, void *cb_data)
{
- return do_for_each_ref(submodule, "", fn, 0, 0, cb_data);
-}
+ struct ref_iterator *iter;
+ struct do_for_each_ref_help hp = { fn, cb_data };
-int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data)
-{
- return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data);
-}
+ if (!refs)
+ return 0;
-int for_each_ref_in_submodule(const char *submodule, const char *prefix,
- each_ref_fn fn, void *cb_data)
-{
- return do_for_each_ref(submodule, prefix, fn, strlen(prefix), 0, cb_data);
-}
+ iter = refs_ref_iterator_begin(refs, prefix, trim, flags);
-int for_each_tag_ref(each_ref_fn fn, void *cb_data)
-{
- return for_each_ref_in("refs/tags/", fn, cb_data);
+ return do_for_each_repo_ref_iterator(the_repository, iter,
+ do_for_each_ref_helper, &hp);
}
-int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
+int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
- return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data);
+ return do_for_each_ref(refs, "", fn, 0, 0, cb_data);
}
-int for_each_branch_ref(each_ref_fn fn, void *cb_data)
+int for_each_ref(each_ref_fn fn, void *cb_data)
{
- return for_each_ref_in("refs/heads/", fn, cb_data);
+ return refs_for_each_ref(get_main_ref_store(the_repository), fn, cb_data);
}
-int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
+int refs_for_each_ref_in(struct ref_store *refs, const char *prefix,
+ each_ref_fn fn, void *cb_data)
{
- return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data);
+ return do_for_each_ref(refs, prefix, fn, strlen(prefix), 0, cb_data);
}
-int for_each_remote_ref(each_ref_fn fn, void *cb_data)
+int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data)
{
- return for_each_ref_in("refs/remotes/", fn, cb_data);
+ return refs_for_each_ref_in(get_main_ref_store(the_repository), prefix, fn, cb_data);
}
-int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data)
+int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken)
{
- return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data);
-}
+ unsigned int flag = 0;
-int for_each_replace_ref(each_ref_fn fn, void *cb_data)
-{
- return do_for_each_ref(NULL, "refs/replace/", fn, 13, 0, cb_data);
+ if (broken)
+ flag = DO_FOR_EACH_INCLUDE_BROKEN;
+ return do_for_each_ref(get_main_ref_store(the_repository),
+ prefix, fn, 0, flag, cb_data);
}
-int head_ref_namespaced(each_ref_fn fn, void *cb_data)
+int refs_for_each_fullref_in(struct ref_store *refs, const char *prefix,
+ each_ref_fn fn, void *cb_data,
+ unsigned int broken)
{
- struct strbuf buf = STRBUF_INIT;
- int ret = 0;
- unsigned char sha1[20];
- int flag;
+ unsigned int flag = 0;
- strbuf_addf(&buf, "%sHEAD", get_git_namespace());
- if (!read_ref_full(buf.buf, sha1, 1, &flag))
- ret = fn(buf.buf, sha1, flag, cb_data);
- strbuf_release(&buf);
+ if (broken)
+ flag = DO_FOR_EACH_INCLUDE_BROKEN;
+ return do_for_each_ref(refs, prefix, fn, 0, flag, cb_data);
+}
- return ret;
+int for_each_replace_ref(struct repository *r, each_repo_ref_fn fn, void *cb_data)
+{
+ return do_for_each_repo_ref(r, git_replace_ref_base, fn,
+ strlen(git_replace_ref_base),
+ DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
}
int for_each_namespaced_ref(each_ref_fn fn, void *cb_data)
struct strbuf buf = STRBUF_INIT;
int ret;
strbuf_addf(&buf, "%srefs/", get_git_namespace());
- ret = do_for_each_ref(NULL, buf.buf, fn, 0, 0, cb_data);
+ ret = do_for_each_ref(get_main_ref_store(the_repository),
+ buf.buf, fn, 0, 0, cb_data);
strbuf_release(&buf);
return ret;
}
-int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
- const char *prefix, void *cb_data)
-{
- struct strbuf real_pattern = STRBUF_INIT;
- struct ref_filter filter;
- int ret;
-
- if (!prefix && prefixcmp(pattern, "refs/"))
- strbuf_addstr(&real_pattern, "refs/");
- else if (prefix)
- strbuf_addstr(&real_pattern, prefix);
- strbuf_addstr(&real_pattern, pattern);
-
- if (!has_glob_specials(pattern)) {
- /* Append implied '/' '*' if not present. */
- if (real_pattern.buf[real_pattern.len - 1] != '/')
- strbuf_addch(&real_pattern, '/');
- /* No need to check for '*', there is none. */
- strbuf_addch(&real_pattern, '*');
- }
-
- filter.pattern = real_pattern.buf;
- filter.fn = fn;
- filter.cb_data = cb_data;
- ret = for_each_ref(filter_refs, &filter);
-
- strbuf_release(&real_pattern);
- return ret;
-}
-
-int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data)
+int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
- return for_each_glob_ref_in(fn, pattern, NULL, cb_data);
+ return do_for_each_ref(refs, "", fn, 0,
+ DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
}
int for_each_rawref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref(NULL, "", fn, 0,
- DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
+ return refs_for_each_rawref(get_main_ref_store(the_repository), fn, cb_data);
}
-/*
- * Make sure "ref" is something reasonable to have under ".git/refs/";
- * We do not like it if:
- *
- * - any path component of it begins with ".", or
- * - it has double dots "..", or
- * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
- * - it ends with a "/".
- * - it ends with ".lock"
- * - it contains a "\" (backslash)
- */
-
-/* Return true iff ch is not allowed in reference names. */
-static inline int bad_ref_char(int ch)
+static int refs_read_special_head(struct ref_store *ref_store,
+ const char *refname, struct object_id *oid,
+ struct strbuf *referent, unsigned int *type)
{
- if (((unsigned) ch) <= ' ' || ch == 0x7f ||
- ch == '~' || ch == '^' || ch == ':' || ch == '\\')
- return 1;
- /* 2.13 Pattern Matching Notation */
- if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */
- return 1;
- return 0;
-}
+ struct strbuf full_path = STRBUF_INIT;
+ struct strbuf content = STRBUF_INIT;
+ int result = -1;
+ strbuf_addf(&full_path, "%s/%s", ref_store->gitdir, refname);
-/*
- * Try to read one refname component from the front of refname. Return
- * the length of the component found, or -1 if the component is not
- * legal.
- */
-static int check_refname_component(const char *refname, int flags)
-{
- const char *cp;
- char last = '\0';
+ if (strbuf_read_file(&content, full_path.buf, 0) < 0)
+ goto done;
- for (cp = refname; ; cp++) {
- char ch = *cp;
- if (ch == '\0' || ch == '/')
- break;
- if (bad_ref_char(ch))
- return -1; /* Illegal character in refname. */
- if (last == '.' && ch == '.')
- return -1; /* Refname contains "..". */
- if (last == '@' && ch == '{')
- return -1; /* Refname contains "@{". */
- last = ch;
- }
- if (cp == refname)
- return -1; /* Component has zero length. */
- if (refname[0] == '.') {
- if (!(flags & REFNAME_DOT_COMPONENT))
- return -1; /* Component starts with '.'. */
- /*
- * Even if leading dots are allowed, don't allow "."
- * as a component (".." is prevented by a rule above).
- */
- if (refname[1] == '\0')
- return -1; /* Component equals ".". */
- }
- if (cp - refname >= 5 && !memcmp(cp - 5, ".lock", 5))
- return -1; /* Refname ends with ".lock". */
- return cp - refname;
+ result = parse_loose_ref_contents(content.buf, oid, referent, type);
+
+done:
+ strbuf_release(&full_path);
+ strbuf_release(&content);
+ return result;
}
-int check_refname_format(const char *refname, int flags)
+int refs_read_raw_ref(struct ref_store *ref_store,
+ const char *refname, struct object_id *oid,
+ struct strbuf *referent, unsigned int *type)
{
- int component_len, component_count = 0;
-
- while (1) {
- /* We are at the start of a path component. */
- component_len = check_refname_component(refname, flags);
- if (component_len < 0) {
- if ((flags & REFNAME_REFSPEC_PATTERN) &&
- refname[0] == '*' &&
- (refname[1] == '\0' || refname[1] == '/')) {
- /* Accept one wildcard as a full refname component. */
- flags &= ~REFNAME_REFSPEC_PATTERN;
- component_len = 1;
- } else {
- return -1;
- }
- }
- component_count++;
- if (refname[component_len] == '\0')
- break;
- /* Skip to next component. */
- refname += component_len + 1;
+ if (!strcmp(refname, "FETCH_HEAD") || !strcmp(refname, "MERGE_HEAD")) {
+ return refs_read_special_head(ref_store, refname, oid, referent,
+ type);
}
- if (refname[component_len - 1] == '.')
- return -1; /* Refname ends with '.'. */
- if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2)
- return -1; /* Refname has only one component. */
- return 0;
+ return ref_store->be->read_raw_ref(ref_store, refname, oid, referent,
+ type);
}
-const char *prettify_refname(const char *name)
+/* This function needs to return a meaningful errno on failure */
+const char *refs_resolve_ref_unsafe(struct ref_store *refs,
+ const char *refname,
+ int resolve_flags,
+ struct object_id *oid, int *flags)
{
- return name + (
- !prefixcmp(name, "refs/heads/") ? 11 :
- !prefixcmp(name, "refs/tags/") ? 10 :
- !prefixcmp(name, "refs/remotes/") ? 13 :
- 0);
-}
+ static struct strbuf sb_refname = STRBUF_INIT;
+ struct object_id unused_oid;
+ int unused_flags;
+ int symref_count;
-const char *ref_rev_parse_rules[] = {
- "%.*s",
- "refs/%.*s",
- "refs/tags/%.*s",
- "refs/heads/%.*s",
- "refs/remotes/%.*s",
- "refs/remotes/%.*s/HEAD",
- NULL
-};
+ if (!oid)
+ oid = &unused_oid;
+ if (!flags)
+ flags = &unused_flags;
-int refname_match(const char *abbrev_name, const char *full_name, const char **rules)
-{
- const char **p;
- const int abbrev_name_len = strlen(abbrev_name);
+ *flags = 0;
- for (p = rules; *p; p++) {
- if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) {
- return 1;
+ if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
+ if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) ||
+ !refname_is_safe(refname)) {
+ errno = EINVAL;
+ return NULL;
}
- }
- return 0;
-}
-
-static struct ref_lock *verify_lock(struct ref_lock *lock,
- const unsigned char *old_sha1, int mustexist)
-{
- if (read_ref_full(lock->ref_name, lock->old_sha1, mustexist, NULL)) {
- error("Can't verify ref %s", lock->ref_name);
- unlock_ref(lock);
- return NULL;
- }
- if (hashcmp(lock->old_sha1, old_sha1)) {
- error("Ref %s is at %s but expected %s", lock->ref_name,
- sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1));
- unlock_ref(lock);
- return NULL;
+ /*
+ * dwim_ref() uses REF_ISBROKEN to distinguish between
+ * missing refs and refs that were present but invalid,
+ * to complain about the latter to stderr.
+ *
+ * We don't know whether the ref exists, so don't set
+ * REF_ISBROKEN yet.
+ */
+ *flags |= REF_BAD_NAME;
}
- return lock;
-}
-static int remove_empty_directories(const char *file)
-{
- /* we want to create a file but there is a directory there;
- * if that is an empty directory (or a directory that contains
- * only empty directories), remove them.
- */
- struct strbuf path;
- int result;
+ for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) {
+ unsigned int read_flags = 0;
- strbuf_init(&path, 20);
- strbuf_addstr(&path, file);
+ if (refs_read_raw_ref(refs, refname,
+ oid, &sb_refname, &read_flags)) {
+ *flags |= read_flags;
- result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY);
+ /* In reading mode, refs must eventually resolve */
+ if (resolve_flags & RESOLVE_REF_READING)
+ return NULL;
- strbuf_release(&path);
+ /*
+ * Otherwise a missing ref is OK. But the files backend
+ * may show errors besides ENOENT if there are
+ * similarly-named refs.
+ */
+ if (errno != ENOENT &&
+ errno != EISDIR &&
+ errno != ENOTDIR)
+ return NULL;
- return result;
-}
+ oidclr(oid);
+ if (*flags & REF_BAD_NAME)
+ *flags |= REF_ISBROKEN;
+ return refname;
+ }
-/*
- * Return true iff a reference named refname could be created without
- * conflicting with the name of an existing reference. If oldrefname
- * is non-NULL, ignore potential conflicts with oldrefname (e.g.,
- * because oldrefname is scheduled for deletion in the same
- * operation).
- */
-static int is_refname_available(const char *refname, const char *oldrefname,
- struct ref_array *array)
-{
- int i, namlen = strlen(refname); /* e.g. 'foo/bar' */
- for (i = 0; i < array->nr; i++ ) {
- struct ref_entry *entry = array->refs[i];
- /* entry->name could be 'foo' or 'foo/bar/baz' */
- if (!oldrefname || strcmp(oldrefname, entry->name)) {
- int len = strlen(entry->name);
- int cmplen = (namlen < len) ? namlen : len;
- const char *lead = (namlen < len) ? entry->name : refname;
- if (!strncmp(refname, entry->name, cmplen) &&
- lead[cmplen] == '/') {
- error("'%s' exists; cannot create '%s'",
- entry->name, refname);
- return 0;
+ *flags |= read_flags;
+
+ if (!(read_flags & REF_ISSYMREF)) {
+ if (*flags & REF_BAD_NAME) {
+ oidclr(oid);
+ *flags |= REF_ISBROKEN;
}
+ return refname;
}
- }
- return 1;
-}
-/*
- * *string and *len will only be substituted, and *string returned (for
- * later free()ing) if the string passed in is a magic short-hand form
- * to name a branch.
- */
-static char *substitute_branch_name(const char **string, int *len)
-{
- struct strbuf buf = STRBUF_INIT;
- int ret = interpret_branch_name(*string, &buf);
+ refname = sb_refname.buf;
+ if (resolve_flags & RESOLVE_REF_NO_RECURSE) {
+ oidclr(oid);
+ return refname;
+ }
+ if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
+ if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) ||
+ !refname_is_safe(refname)) {
+ errno = EINVAL;
+ return NULL;
+ }
- if (ret == *len) {
- size_t size;
- *string = strbuf_detach(&buf, &size);
- *len = size;
- return (char *)*string;
+ *flags |= REF_ISBROKEN | REF_BAD_NAME;
+ }
}
+ errno = ELOOP;
return NULL;
}
-int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
+/* backend functions */
+int refs_init_db(struct strbuf *err)
{
- char *last_branch = substitute_branch_name(&str, &len);
- const char **p, *r;
- int refs_found = 0;
+ struct ref_store *refs = get_main_ref_store(the_repository);
- *ref = NULL;
- for (p = ref_rev_parse_rules; *p; p++) {
- char fullref[PATH_MAX];
- unsigned char sha1_from_ref[20];
- unsigned char *this_result;
- int flag;
+ return refs->be->init_db(refs, err);
+}
- this_result = refs_found ? sha1_from_ref : sha1;
- mksnpath(fullref, sizeof(fullref), *p, len, str);
- r = resolve_ref_unsafe(fullref, this_result, 1, &flag);
- if (r) {
- if (!refs_found++)
- *ref = xstrdup(r);
- if (!warn_ambiguous_refs)
- break;
- } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) {
- warning("ignoring dangling symref %s.", fullref);
- } else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) {
- warning("ignoring broken ref %s.", fullref);
- }
- }
- free(last_branch);
- return refs_found;
+const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
+ struct object_id *oid, int *flags)
+{
+ return refs_resolve_ref_unsafe(get_main_ref_store(the_repository), refname,
+ resolve_flags, oid, flags);
}
-int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
+int resolve_gitlink_ref(const char *submodule, const char *refname,
+ struct object_id *oid)
{
- char *last_branch = substitute_branch_name(&str, &len);
- const char **p;
- int logs_found = 0;
+ struct ref_store *refs;
+ int flags;
- *log = NULL;
- for (p = ref_rev_parse_rules; *p; p++) {
- struct stat st;
- unsigned char hash[20];
- char path[PATH_MAX];
- const char *ref, *it;
+ refs = get_submodule_ref_store(submodule);
- mksnpath(path, sizeof(path), *p, len, str);
- ref = resolve_ref_unsafe(path, hash, 1, NULL);
- if (!ref)
- continue;
- if (!stat(git_path("logs/%s", path), &st) &&
- S_ISREG(st.st_mode))
- it = path;
- else if (strcmp(ref, path) &&
- !stat(git_path("logs/%s", ref), &st) &&
- S_ISREG(st.st_mode))
- it = ref;
- else
- continue;
- if (!logs_found++) {
- *log = xstrdup(it);
- hashcpy(sha1, hash);
- }
- if (!warn_ambiguous_refs)
- break;
- }
- free(last_branch);
- return logs_found;
+ if (!refs)
+ return -1;
+
+ if (!refs_resolve_ref_unsafe(refs, refname, 0, oid, &flags) ||
+ is_null_oid(oid))
+ return -1;
+ return 0;
}
-static struct ref_lock *lock_ref_sha1_basic(const char *refname,
- const unsigned char *old_sha1,
- int flags, int *type_p)
+struct ref_store_hash_entry
{
- char *ref_file;
- const char *orig_refname = refname;
- struct ref_lock *lock;
- int last_errno = 0;
- int type, lflags;
- int mustexist = (old_sha1 && !is_null_sha1(old_sha1));
- int missing = 0;
+ struct hashmap_entry ent;
- lock = xcalloc(1, sizeof(struct ref_lock));
- lock->lock_fd = -1;
+ struct ref_store *refs;
- refname = resolve_ref_unsafe(refname, lock->old_sha1, mustexist, &type);
- if (!refname && errno == EISDIR) {
- /* we are trying to lock foo but we used to
- * have foo/bar which now does not exist;
- * it is normal for the empty directory 'foo'
- * to remain.
- */
- ref_file = git_path("%s", orig_refname);
- if (remove_empty_directories(ref_file)) {
- last_errno = errno;
- error("there are still refs under '%s'", orig_refname);
- goto error_return;
- }
- refname = resolve_ref_unsafe(orig_refname, lock->old_sha1, mustexist, &type);
- }
- if (type_p)
- *type_p = type;
- if (!refname) {
- last_errno = errno;
- error("unable to resolve reference %s: %s",
- orig_refname, strerror(errno));
- goto error_return;
- }
- missing = is_null_sha1(lock->old_sha1);
- /* When the ref did not exist and we are creating it,
- * make sure there is no existing ref that is packed
- * whose name begins with our refname, nor a ref whose
- * name is a proper prefix of our refname.
- */
- if (missing &&
- !is_refname_available(refname, NULL, get_packed_refs(get_ref_cache(NULL)))) {
- last_errno = ENOTDIR;
- goto error_return;
- }
-
- lock->lk = xcalloc(1, sizeof(struct lock_file));
+ /* NUL-terminated identifier of the ref store: */
+ char name[FLEX_ARRAY];
+};
- lflags = LOCK_DIE_ON_ERROR;
- if (flags & REF_NODEREF) {
- refname = orig_refname;
- lflags |= LOCK_NODEREF;
- }
- lock->ref_name = xstrdup(refname);
- lock->orig_ref_name = xstrdup(orig_refname);
- ref_file = git_path("%s", refname);
- if (missing)
- lock->force_write = 1;
- if ((flags & REF_NODEREF) && (type & REF_ISSYMREF))
- lock->force_write = 1;
-
- if (safe_create_leading_directories(ref_file)) {
- last_errno = errno;
- error("unable to create directory for %s", ref_file);
- goto error_return;
- }
+static int ref_store_hash_cmp(const void *unused_cmp_data,
+ const struct hashmap_entry *eptr,
+ const struct hashmap_entry *entry_or_key,
+ const void *keydata)
+{
+ const struct ref_store_hash_entry *e1, *e2;
+ const char *name;
- lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags);
- return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock;
+ e1 = container_of(eptr, const struct ref_store_hash_entry, ent);
+ e2 = container_of(entry_or_key, const struct ref_store_hash_entry, ent);
+ name = keydata ? keydata : e2->name;
- error_return:
- unlock_ref(lock);
- errno = last_errno;
- return NULL;
+ return strcmp(e1->name, name);
}
-struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1)
+static struct ref_store_hash_entry *alloc_ref_store_hash_entry(
+ const char *name, struct ref_store *refs)
{
- char refpath[PATH_MAX];
- if (check_refname_format(refname, 0))
- return NULL;
- strcpy(refpath, mkpath("refs/%s", refname));
- return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL);
+ struct ref_store_hash_entry *entry;
+
+ FLEX_ALLOC_STR(entry, name, name);
+ hashmap_entry_init(&entry->ent, strhash(name));
+ entry->refs = refs;
+ return entry;
}
-struct ref_lock *lock_any_ref_for_update(const char *refname,
- const unsigned char *old_sha1, int flags)
+/* A hashmap of ref_stores, stored by submodule name: */
+static struct hashmap submodule_ref_stores;
+
+/* A hashmap of ref_stores, stored by worktree id: */
+static struct hashmap worktree_ref_stores;
+
+/*
+ * Look up a ref store by name. If that ref_store hasn't been
+ * registered yet, return NULL.
+ */
+static struct ref_store *lookup_ref_store_map(struct hashmap *map,
+ const char *name)
{
- if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL))
+ struct ref_store_hash_entry *entry;
+ unsigned int hash;
+
+ if (!map->tablesize)
+ /* It's initialized on demand in register_ref_store(). */
return NULL;
- return lock_ref_sha1_basic(refname, old_sha1, flags, NULL);
-}
-static struct lock_file packlock;
+ hash = strhash(name);
+ entry = hashmap_get_entry_from_hash(map, hash, name,
+ struct ref_store_hash_entry, ent);
+ return entry ? entry->refs : NULL;
+}
-static int repack_without_ref(const char *refname)
+/*
+ * Create, record, and return a ref_store instance for the specified
+ * gitdir.
+ */
+static struct ref_store *ref_store_init(const char *gitdir,
+ unsigned int flags)
{
- struct ref_array *packed;
- int fd, i;
+ const char *be_name = "files";
+ struct ref_storage_be *be = find_ref_storage_backend(be_name);
+ struct ref_store *refs;
- packed = get_packed_refs(get_ref_cache(NULL));
- if (search_ref_array(packed, refname) == NULL)
- return 0;
- fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0);
- if (fd < 0) {
- unable_to_lock_error(git_path("packed-refs"), errno);
- return error("cannot delete '%s' from packed refs", refname);
- }
-
- for (i = 0; i < packed->nr; i++) {
- char line[PATH_MAX + 100];
- int len;
- struct ref_entry *ref = packed->refs[i];
+ if (!be)
+ BUG("reference backend %s is unknown", be_name);
- if (!strcmp(refname, ref->name))
- continue;
- len = snprintf(line, sizeof(line), "%s %s\n",
- sha1_to_hex(ref->sha1), ref->name);
- /* this should not happen but just being defensive */
- if (len > sizeof(line))
- die("too long a refname '%s'", ref->name);
- write_or_die(fd, line, len);
- }
- return commit_lock_file(&packlock);
+ refs = be->init(gitdir, flags);
+ return refs;
}
-int delete_ref(const char *refname, const unsigned char *sha1, int delopt)
+struct ref_store *get_main_ref_store(struct repository *r)
{
- struct ref_lock *lock;
- int err, i = 0, ret = 0, flag = 0;
-
- lock = lock_ref_sha1_basic(refname, sha1, 0, &flag);
- if (!lock)
- return 1;
- if (!(flag & REF_ISPACKED) || flag & REF_ISSYMREF) {
- /* loose */
- const char *path;
-
- if (!(delopt & REF_NODEREF)) {
- i = strlen(lock->lk->filename) - 5; /* .lock */
- lock->lk->filename[i] = 0;
- path = lock->lk->filename;
- } else {
- path = git_path("%s", refname);
- }
- err = unlink_or_warn(path);
- if (err && errno != ENOENT)
- ret = 1;
+ if (r->refs_private)
+ return r->refs_private;
- if (!(delopt & REF_NODEREF))
- lock->lk->filename[i] = '.';
- }
- /* removing the loose one could have resurrected an earlier
- * packed one. Also, if it was not loose we need to repack
- * without it.
- */
- ret |= repack_without_ref(refname);
+ if (!r->gitdir)
+ BUG("attempting to get main_ref_store outside of repository");
- unlink_or_warn(git_path("logs/%s", lock->ref_name));
- invalidate_ref_cache(NULL);
- unlock_ref(lock);
- return ret;
+ r->refs_private = ref_store_init(r->gitdir, REF_STORE_ALL_CAPS);
+ r->refs_private = maybe_debug_wrap_ref_store(r->gitdir, r->refs_private);
+ return r->refs_private;
}
/*
- * People using contrib's git-new-workdir have .git/logs/refs ->
- * /some/other/path/.git/logs/refs, and that may live on another device.
- *
- * IOW, to avoid cross device rename errors, the temporary renamed log must
- * live into logs/refs.
+ * Associate a ref store with a name. It is a fatal error to call this
+ * function twice for the same name.
*/
-#define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log"
+static void register_ref_store_map(struct hashmap *map,
+ const char *type,
+ struct ref_store *refs,
+ const char *name)
+{
+ struct ref_store_hash_entry *entry;
-int rename_ref(const char *oldrefname, const char *newrefname, const char *logmsg)
+ if (!map->tablesize)
+ hashmap_init(map, ref_store_hash_cmp, NULL, 0);
+
+ entry = alloc_ref_store_hash_entry(name, refs);
+ if (hashmap_put(map, &entry->ent))
+ BUG("%s ref_store '%s' initialized twice", type, name);
+}
+
+struct ref_store *get_submodule_ref_store(const char *submodule)
{
- unsigned char sha1[20], orig_sha1[20];
- int flag = 0, logmoved = 0;
- struct ref_lock *lock;
- struct stat loginfo;
- int log = !lstat(git_path("logs/%s", oldrefname), &loginfo);
- const char *symref = NULL;
- struct ref_cache *refs = get_ref_cache(NULL);
+ struct strbuf submodule_sb = STRBUF_INIT;
+ struct ref_store *refs;
+ char *to_free = NULL;
+ size_t len;
- if (log && S_ISLNK(loginfo.st_mode))
- return error("reflog for %s is a symlink", oldrefname);
+ if (!submodule)
+ return NULL;
- symref = resolve_ref_unsafe(oldrefname, orig_sha1, 1, &flag);
- if (flag & REF_ISSYMREF)
- return error("refname %s is a symbolic ref, renaming it is not supported",
- oldrefname);
- if (!symref)
- return error("refname %s not found", oldrefname);
+ len = strlen(submodule);
+ while (len && is_dir_sep(submodule[len - 1]))
+ len--;
+ if (!len)
+ return NULL;
- if (!is_refname_available(newrefname, oldrefname, get_packed_refs(refs)))
- return 1;
+ if (submodule[len])
+ /* We need to strip off one or more trailing slashes */
+ submodule = to_free = xmemdupz(submodule, len);
- if (!is_refname_available(newrefname, oldrefname, get_loose_refs(refs)))
- return 1;
+ refs = lookup_ref_store_map(&submodule_ref_stores, submodule);
+ if (refs)
+ goto done;
- if (log && rename(git_path("logs/%s", oldrefname), git_path(TMP_RENAMED_LOG)))
- return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s",
- oldrefname, strerror(errno));
+ strbuf_addstr(&submodule_sb, submodule);
+ if (!is_nonbare_repository_dir(&submodule_sb))
+ goto done;
- if (delete_ref(oldrefname, orig_sha1, REF_NODEREF)) {
- error("unable to delete old %s", oldrefname);
- goto rollback;
- }
+ if (submodule_to_gitdir(&submodule_sb, submodule))
+ goto done;
- if (!read_ref_full(newrefname, sha1, 1, &flag) &&
- delete_ref(newrefname, sha1, REF_NODEREF)) {
- if (errno==EISDIR) {
- if (remove_empty_directories(git_path("%s", newrefname))) {
- error("Directory not empty: %s", newrefname);
- goto rollback;
- }
- } else {
- error("unable to delete existing %s", newrefname);
- goto rollback;
- }
- }
+ /* assume that add_submodule_odb() has been called */
+ refs = ref_store_init(submodule_sb.buf,
+ REF_STORE_READ | REF_STORE_ODB);
+ register_ref_store_map(&submodule_ref_stores, "submodule",
+ refs, submodule);
- if (log && safe_create_leading_directories(git_path("logs/%s", newrefname))) {
- error("unable to create directory for %s", newrefname);
- goto rollback;
- }
+done:
+ strbuf_release(&submodule_sb);
+ free(to_free);
- retry:
- if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newrefname))) {
- if (errno==EISDIR || errno==ENOTDIR) {
- /*
- * rename(a, b) when b is an existing
- * directory ought to result in ISDIR, but
- * Solaris 5.8 gives ENOTDIR. Sheesh.
- */
- if (remove_empty_directories(git_path("logs/%s", newrefname))) {
- error("Directory not empty: logs/%s", newrefname);
- goto rollback;
- }
- goto retry;
- } else {
- error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s",
- newrefname, strerror(errno));
- goto rollback;
- }
- }
- logmoved = log;
+ return refs;
+}
- lock = lock_ref_sha1_basic(newrefname, NULL, 0, NULL);
- if (!lock) {
- error("unable to lock %s for update", newrefname);
- goto rollback;
- }
- lock->force_write = 1;
- hashcpy(lock->old_sha1, orig_sha1);
- if (write_ref_sha1(lock, orig_sha1, logmsg)) {
- error("unable to write current sha1 into %s", newrefname);
- goto rollback;
- }
+struct ref_store *get_worktree_ref_store(const struct worktree *wt)
+{
+ struct ref_store *refs;
+ const char *id;
- return 0;
+ if (wt->is_current)
+ return get_main_ref_store(the_repository);
- rollback:
- lock = lock_ref_sha1_basic(oldrefname, NULL, 0, NULL);
- if (!lock) {
- error("unable to lock %s for rollback", oldrefname);
- goto rollbacklog;
- }
+ id = wt->id ? wt->id : "/";
+ refs = lookup_ref_store_map(&worktree_ref_stores, id);
+ if (refs)
+ return refs;
- lock->force_write = 1;
- flag = log_all_ref_updates;
- log_all_ref_updates = 0;
- if (write_ref_sha1(lock, orig_sha1, NULL))
- error("unable to write current sha1 into %s", oldrefname);
- log_all_ref_updates = flag;
-
- rollbacklog:
- if (logmoved && rename(git_path("logs/%s", newrefname), git_path("logs/%s", oldrefname)))
- error("unable to restore logfile %s from %s: %s",
- oldrefname, newrefname, strerror(errno));
- if (!logmoved && log &&
- rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldrefname)))
- error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s",
- oldrefname, strerror(errno));
+ if (wt->id)
+ refs = ref_store_init(git_common_path("worktrees/%s", wt->id),
+ REF_STORE_ALL_CAPS);
+ else
+ refs = ref_store_init(get_git_common_dir(),
+ REF_STORE_ALL_CAPS);
- return 1;
+ if (refs)
+ register_ref_store_map(&worktree_ref_stores, "worktree",
+ refs, id);
+ return refs;
}
-int close_ref(struct ref_lock *lock)
+void base_ref_store_init(struct ref_store *refs,
+ const struct ref_storage_be *be)
{
- if (close_lock_file(lock->lk))
- return -1;
- lock->lock_fd = -1;
- return 0;
+ refs->be = be;
}
-int commit_ref(struct ref_lock *lock)
+/* backend functions */
+int refs_pack_refs(struct ref_store *refs, unsigned int flags)
{
- if (commit_lock_file(lock->lk))
- return -1;
- lock->lock_fd = -1;
- return 0;
+ return refs->be->pack_refs(refs, flags);
}
-void unlock_ref(struct ref_lock *lock)
+int refs_peel_ref(struct ref_store *refs, const char *refname,
+ struct object_id *oid)
{
- /* Do not free lock->lk -- atexit() still looks at them */
- if (lock->lk)
- rollback_lock_file(lock->lk);
- free(lock->ref_name);
- free(lock->orig_ref_name);
- free(lock);
-}
+ int flag;
+ struct object_id base;
-/*
- * copy the reflog message msg to buf, which has been allocated sufficiently
- * large, while cleaning up the whitespaces. Especially, convert LF to space,
- * because reflog file is one line per entry.
- */
-static int copy_msg(char *buf, const char *msg)
-{
- char *cp = buf;
- char c;
- int wasspace = 1;
+ if (current_ref_iter && current_ref_iter->refname == refname) {
+ struct object_id peeled;
- *cp++ = '\t';
- while ((c = *msg++)) {
- if (wasspace && isspace(c))
- continue;
- wasspace = isspace(c);
- if (wasspace)
- c = ' ';
- *cp++ = c;
- }
- while (buf < cp && isspace(cp[-1]))
- cp--;
- *cp++ = '\n';
- return cp - buf;
-}
-
-int log_ref_setup(const char *refname, char *logfile, int bufsize)
-{
- int logfd, oflags = O_APPEND | O_WRONLY;
-
- git_snpath(logfile, bufsize, "logs/%s", refname);
- if (log_all_ref_updates &&
- (!prefixcmp(refname, "refs/heads/") ||
- !prefixcmp(refname, "refs/remotes/") ||
- !prefixcmp(refname, "refs/notes/") ||
- !strcmp(refname, "HEAD"))) {
- if (safe_create_leading_directories(logfile) < 0)
- return error("unable to create directory for %s",
- logfile);
- oflags |= O_CREAT;
+ if (ref_iterator_peel(current_ref_iter, &peeled))
+ return -1;
+ oidcpy(oid, &peeled);
+ return 0;
}
- logfd = open(logfile, oflags, 0666);
- if (logfd < 0) {
- if (!(oflags & O_CREAT) && errno == ENOENT)
- return 0;
-
- if ((oflags & O_CREAT) && errno == EISDIR) {
- if (remove_empty_directories(logfile)) {
- return error("There are still logs under '%s'",
- logfile);
- }
- logfd = open(logfile, oflags, 0666);
- }
-
- if (logfd < 0)
- return error("Unable to append to %s: %s",
- logfile, strerror(errno));
- }
+ if (refs_read_ref_full(refs, refname,
+ RESOLVE_REF_READING, &base, &flag))
+ return -1;
- adjust_shared_perm(logfile);
- close(logfd);
- return 0;
+ return peel_object(&base, oid);
}
-static int log_ref_write(const char *refname, const unsigned char *old_sha1,
- const unsigned char *new_sha1, const char *msg)
+int peel_ref(const char *refname, struct object_id *oid)
{
- int logfd, result, written, oflags = O_APPEND | O_WRONLY;
- unsigned maxlen, len;
- int msglen;
- char log_file[PATH_MAX];
- char *logrec;
- const char *committer;
-
- if (log_all_ref_updates < 0)
- log_all_ref_updates = !is_bare_repository();
+ return refs_peel_ref(get_main_ref_store(the_repository), refname, oid);
+}
- result = log_ref_setup(refname, log_file, sizeof(log_file));
- if (result)
- return result;
+int refs_create_symref(struct ref_store *refs,
+ const char *ref_target,
+ const char *refs_heads_master,
+ const char *logmsg)
+{
+ char *msg;
+ int retval;
- logfd = open(log_file, oflags);
- if (logfd < 0)
- return 0;
- msglen = msg ? strlen(msg) : 0;
- committer = git_committer_info(0);
- maxlen = strlen(committer) + msglen + 100;
- logrec = xmalloc(maxlen);
- len = sprintf(logrec, "%s %s %s\n",
- sha1_to_hex(old_sha1),
- sha1_to_hex(new_sha1),
- committer);
- if (msglen)
- len += copy_msg(logrec + len - 1, msg) - 1;
- written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1;
- free(logrec);
- if (close(logfd) != 0 || written != len)
- return error("Unable to append to %s", log_file);
- return 0;
+ msg = normalize_reflog_message(logmsg);
+ retval = refs->be->create_symref(refs, ref_target, refs_heads_master,
+ msg);
+ free(msg);
+ return retval;
}
-static int is_branch(const char *refname)
+int create_symref(const char *ref_target, const char *refs_heads_master,
+ const char *logmsg)
{
- return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/");
+ return refs_create_symref(get_main_ref_store(the_repository), ref_target,
+ refs_heads_master, logmsg);
}
-int write_ref_sha1(struct ref_lock *lock,
- const unsigned char *sha1, const char *logmsg)
+int ref_update_reject_duplicates(struct string_list *refnames,
+ struct strbuf *err)
{
- static char term = '\n';
- struct object *o;
+ size_t i, n = refnames->nr;
- if (!lock)
- return -1;
- if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) {
- unlock_ref(lock);
- return 0;
- }
- o = parse_object(sha1);
- if (!o) {
- error("Trying to write ref %s with nonexistent object %s",
- lock->ref_name, sha1_to_hex(sha1));
- unlock_ref(lock);
- return -1;
- }
- if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) {
- error("Trying to write non-commit object %s to branch %s",
- sha1_to_hex(sha1), lock->ref_name);
- unlock_ref(lock);
- return -1;
- }
- if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 ||
- write_in_full(lock->lock_fd, &term, 1) != 1
- || close_ref(lock) < 0) {
- error("Couldn't write %s", lock->lk->filename);
- unlock_ref(lock);
- return -1;
- }
- clear_loose_ref_cache(get_ref_cache(NULL));
- if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 ||
- (strcmp(lock->ref_name, lock->orig_ref_name) &&
- log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) {
- unlock_ref(lock);
- return -1;
- }
- if (strcmp(lock->orig_ref_name, "HEAD") != 0) {
- /*
- * Special hack: If a branch is updated directly and HEAD
- * points to it (may happen on the remote side of a push
- * for example) then logically the HEAD reflog should be
- * updated too.
- * A generic solution implies reverse symref information,
- * but finding all symrefs pointing to the given branch
- * would be rather costly for this rare event (the direct
- * update of a branch) to be worth it. So let's cheat and
- * check with HEAD only which should cover 99% of all usage
- * scenarios (even 100% of the default ones).
- */
- unsigned char head_sha1[20];
- int head_flag;
- const char *head_ref;
- head_ref = resolve_ref_unsafe("HEAD", head_sha1, 1, &head_flag);
- if (head_ref && (head_flag & REF_ISSYMREF) &&
- !strcmp(head_ref, lock->ref_name))
- log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
- }
- if (commit_ref(lock)) {
- error("Couldn't set %s", lock->ref_name);
- unlock_ref(lock);
- return -1;
+ assert(err);
+
+ for (i = 1; i < n; i++) {
+ int cmp = strcmp(refnames->items[i - 1].string,
+ refnames->items[i].string);
+
+ if (!cmp) {
+ strbuf_addf(err,
+ _("multiple updates for ref '%s' not allowed"),
+ refnames->items[i].string);
+ return 1;
+ } else if (cmp > 0) {
+ BUG("ref_update_reject_duplicates() received unsorted list");
+ }
}
- unlock_ref(lock);
return 0;
}
-int create_symref(const char *ref_target, const char *refs_heads_master,
- const char *logmsg)
+static int run_transaction_hook(struct ref_transaction *transaction,
+ const char *state)
{
- const char *lockpath;
- char ref[1000];
- int fd, len, written;
- char *git_HEAD = git_pathdup("%s", ref_target);
- unsigned char old_sha1[20], new_sha1[20];
+ struct child_process proc = CHILD_PROCESS_INIT;
+ struct strbuf buf = STRBUF_INIT;
+ const char *hook;
+ int ret = 0, i;
- if (logmsg && read_ref(ref_target, old_sha1))
- hashclr(old_sha1);
+ hook = find_hook("reference-transaction");
+ if (!hook)
+ return ret;
- if (safe_create_leading_directories(git_HEAD) < 0)
- return error("unable to create directory for %s", git_HEAD);
+ strvec_pushl(&proc.args, hook, state, NULL);
+ proc.in = -1;
+ proc.stdout_to_stderr = 1;
+ proc.trace2_hook_name = "reference-transaction";
-#ifndef NO_SYMLINK_HEAD
- if (prefer_symlink_refs) {
- unlink(git_HEAD);
- if (!symlink(refs_heads_master, git_HEAD))
- goto done;
- fprintf(stderr, "no symlink - falling back to symbolic ref\n");
- }
-#endif
+ ret = start_command(&proc);
+ if (ret)
+ return ret;
- len = snprintf(ref, sizeof(ref), "ref: %s\n", refs_heads_master);
- if (sizeof(ref) <= len) {
- error("refname too long: %s", refs_heads_master);
- goto error_free_return;
- }
- lockpath = mkpath("%s.lock", git_HEAD);
- fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);
- if (fd < 0) {
- error("Unable to open %s for writing", lockpath);
- goto error_free_return;
- }
- written = write_in_full(fd, ref, len);
- if (close(fd) != 0 || written != len) {
- error("Unable to write to %s", lockpath);
- goto error_unlink_return;
- }
- if (rename(lockpath, git_HEAD) < 0) {
- error("Unable to create %s", git_HEAD);
- goto error_unlink_return;
- }
- if (adjust_shared_perm(git_HEAD)) {
- error("Unable to fix permissions on %s", lockpath);
- error_unlink_return:
- unlink_or_warn(lockpath);
- error_free_return:
- free(git_HEAD);
- return -1;
- }
+ sigchain_push(SIGPIPE, SIG_IGN);
-#ifndef NO_SYMLINK_HEAD
- done:
-#endif
- if (logmsg && !read_ref(refs_heads_master, new_sha1))
- log_ref_write(ref_target, old_sha1, new_sha1, logmsg);
+ for (i = 0; i < transaction->nr; i++) {
+ struct ref_update *update = transaction->updates[i];
- free(git_HEAD);
- return 0;
-}
+ strbuf_reset(&buf);
+ strbuf_addf(&buf, "%s %s %s\n",
+ oid_to_hex(&update->old_oid),
+ oid_to_hex(&update->new_oid),
+ update->refname);
-static char *ref_msg(const char *line, const char *endp)
-{
- const char *ep;
- line += 82;
- ep = memchr(line, '\n', endp - line);
- if (!ep)
- ep = endp;
- return xmemdupz(line, ep - line);
-}
-
-int read_ref_at(const char *refname, unsigned long at_time, int cnt,
- unsigned char *sha1, char **msg,
- unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
-{
- const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec;
- char *tz_c;
- int logfd, tz, reccnt = 0;
- struct stat st;
- unsigned long date;
- unsigned char logged_sha1[20];
- void *log_mapped;
- size_t mapsz;
-
- logfile = git_path("logs/%s", refname);
- logfd = open(logfile, O_RDONLY, 0);
- if (logfd < 0)
- die_errno("Unable to read log '%s'", logfile);
- fstat(logfd, &st);
- if (!st.st_size)
- die("Log %s is empty.", logfile);
- mapsz = xsize_t(st.st_size);
- log_mapped = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, logfd, 0);
- logdata = log_mapped;
- close(logfd);
-
- lastrec = NULL;
- rec = logend = logdata + st.st_size;
- while (logdata < rec) {
- reccnt++;
- if (logdata < rec && *(rec-1) == '\n')
- rec--;
- lastgt = NULL;
- while (logdata < rec && *(rec-1) != '\n') {
- rec--;
- if (*rec == '>')
- lastgt = rec;
- }
- if (!lastgt)
- die("Log %s is corrupt.", logfile);
- date = strtoul(lastgt + 1, &tz_c, 10);
- if (date <= at_time || cnt == 0) {
- tz = strtoul(tz_c, NULL, 10);
- if (msg)
- *msg = ref_msg(rec, logend);
- if (cutoff_time)
- *cutoff_time = date;
- if (cutoff_tz)
- *cutoff_tz = tz;
- if (cutoff_cnt)
- *cutoff_cnt = reccnt - 1;
- if (lastrec) {
- if (get_sha1_hex(lastrec, logged_sha1))
- die("Log %s is corrupt.", logfile);
- if (get_sha1_hex(rec + 41, sha1))
- die("Log %s is corrupt.", logfile);
- if (hashcmp(logged_sha1, sha1)) {
- warning("Log %s has gap after %s.",
- logfile, show_date(date, tz, DATE_RFC2822));
- }
- }
- else if (date == at_time) {
- if (get_sha1_hex(rec + 41, sha1))
- die("Log %s is corrupt.", logfile);
- }
- else {
- if (get_sha1_hex(rec + 41, logged_sha1))
- die("Log %s is corrupt.", logfile);
- if (hashcmp(logged_sha1, sha1)) {
- warning("Log %s unexpectedly ended on %s.",
- logfile, show_date(date, tz, DATE_RFC2822));
- }
- }
- munmap(log_mapped, mapsz);
- return 0;
+ if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
+ if (errno != EPIPE)
+ ret = -1;
+ break;
}
- lastrec = rec;
- if (cnt > 0)
- cnt--;
}
- rec = logdata;
- while (rec < logend && *rec != '>' && *rec != '\n')
- rec++;
- if (rec == logend || *rec == '\n')
- die("Log %s is corrupt.", logfile);
- date = strtoul(rec + 1, &tz_c, 10);
- tz = strtoul(tz_c, NULL, 10);
- if (get_sha1_hex(logdata, sha1))
- die("Log %s is corrupt.", logfile);
- if (is_null_sha1(sha1)) {
- if (get_sha1_hex(logdata + 41, sha1))
- die("Log %s is corrupt.", logfile);
- }
- if (msg)
- *msg = ref_msg(logdata, logend);
- munmap(log_mapped, mapsz);
-
- if (cutoff_time)
- *cutoff_time = date;
- if (cutoff_tz)
- *cutoff_tz = tz;
- if (cutoff_cnt)
- *cutoff_cnt = reccnt;
- return 1;
+ close(proc.in);
+ sigchain_pop(SIGPIPE);
+ strbuf_release(&buf);
+
+ ret |= finish_command(&proc);
+ return ret;
}
-int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data)
+int ref_transaction_prepare(struct ref_transaction *transaction,
+ struct strbuf *err)
{
- const char *logfile;
- FILE *logfp;
- struct strbuf sb = STRBUF_INIT;
- int ret = 0;
+ struct ref_store *refs = transaction->ref_store;
+ int ret;
- logfile = git_path("logs/%s", refname);
- logfp = fopen(logfile, "r");
- if (!logfp)
+ switch (transaction->state) {
+ case REF_TRANSACTION_OPEN:
+ /* Good. */
+ break;
+ case REF_TRANSACTION_PREPARED:
+ BUG("prepare called twice on reference transaction");
+ break;
+ case REF_TRANSACTION_CLOSED:
+ BUG("prepare called on a closed reference transaction");
+ break;
+ default:
+ BUG("unexpected reference transaction state");
+ break;
+ }
+
+ if (getenv(GIT_QUARANTINE_ENVIRONMENT)) {
+ strbuf_addstr(err,
+ _("ref updates forbidden inside quarantine environment"));
return -1;
+ }
- if (ofs) {
- struct stat statbuf;
- if (fstat(fileno(logfp), &statbuf) ||
- statbuf.st_size < ofs ||
- fseek(logfp, -ofs, SEEK_END) ||
- strbuf_getwholeline(&sb, logfp, '\n')) {
- fclose(logfp);
- strbuf_release(&sb);
- return -1;
- }
+ ret = refs->be->transaction_prepare(refs, transaction, err);
+ if (ret)
+ return ret;
+
+ ret = run_transaction_hook(transaction, "prepared");
+ if (ret) {
+ ref_transaction_abort(transaction, err);
+ die(_("ref updates aborted by hook"));
}
- while (!strbuf_getwholeline(&sb, logfp, '\n')) {
- unsigned char osha1[20], nsha1[20];
- char *email_end, *message;
- unsigned long timestamp;
- int tz;
-
- /* old SP new SP name <email> SP time TAB msg LF */
- if (sb.len < 83 || sb.buf[sb.len - 1] != '\n' ||
- get_sha1_hex(sb.buf, osha1) || sb.buf[40] != ' ' ||
- get_sha1_hex(sb.buf + 41, nsha1) || sb.buf[81] != ' ' ||
- !(email_end = strchr(sb.buf + 82, '>')) ||
- email_end[1] != ' ' ||
- !(timestamp = strtoul(email_end + 2, &message, 10)) ||
- !message || message[0] != ' ' ||
- (message[1] != '+' && message[1] != '-') ||
- !isdigit(message[2]) || !isdigit(message[3]) ||
- !isdigit(message[4]) || !isdigit(message[5]))
- continue; /* corrupt? */
- email_end[1] = '\0';
- tz = strtol(message + 1, NULL, 10);
- if (message[6] != '\t')
- message += 6;
- else
- message += 7;
- ret = fn(osha1, nsha1, sb.buf + 82, timestamp, tz, message,
- cb_data);
- if (ret)
- break;
+ return 0;
+}
+
+int ref_transaction_abort(struct ref_transaction *transaction,
+ struct strbuf *err)
+{
+ struct ref_store *refs = transaction->ref_store;
+ int ret = 0;
+
+ switch (transaction->state) {
+ case REF_TRANSACTION_OPEN:
+ /* No need to abort explicitly. */
+ break;
+ case REF_TRANSACTION_PREPARED:
+ ret = refs->be->transaction_abort(refs, transaction, err);
+ break;
+ case REF_TRANSACTION_CLOSED:
+ BUG("abort called on a closed reference transaction");
+ break;
+ default:
+ BUG("unexpected reference transaction state");
+ break;
}
- fclose(logfp);
- strbuf_release(&sb);
+
+ run_transaction_hook(transaction, "aborted");
+
+ ref_transaction_free(transaction);
return ret;
}
-int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data)
+int ref_transaction_commit(struct ref_transaction *transaction,
+ struct strbuf *err)
{
- return for_each_recent_reflog_ent(refname, fn, 0, cb_data);
+ struct ref_store *refs = transaction->ref_store;
+ int ret;
+
+ switch (transaction->state) {
+ case REF_TRANSACTION_OPEN:
+ /* Need to prepare first. */
+ ret = ref_transaction_prepare(transaction, err);
+ if (ret)
+ return ret;
+ break;
+ case REF_TRANSACTION_PREPARED:
+ /* Fall through to finish. */
+ break;
+ case REF_TRANSACTION_CLOSED:
+ BUG("commit called on a closed reference transaction");
+ break;
+ default:
+ BUG("unexpected reference transaction state");
+ break;
+ }
+
+ ret = refs->be->transaction_finish(refs, transaction, err);
+ if (!ret)
+ run_transaction_hook(transaction, "committed");
+ return ret;
}
-static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data)
+int refs_verify_refname_available(struct ref_store *refs,
+ const char *refname,
+ const struct string_list *extras,
+ const struct string_list *skip,
+ struct strbuf *err)
{
- DIR *dir = opendir(git_path("logs/%s", base));
- int retval = 0;
+ const char *slash;
+ const char *extra_refname;
+ struct strbuf dirname = STRBUF_INIT;
+ struct strbuf referent = STRBUF_INIT;
+ struct object_id oid;
+ unsigned int type;
+ struct ref_iterator *iter;
+ int ok;
+ int ret = -1;
+
+ /*
+ * For the sake of comments in this function, suppose that
+ * refname is "refs/foo/bar".
+ */
- if (dir) {
- struct dirent *de;
- int baselen = strlen(base);
- char *log = xmalloc(baselen + 257);
+ assert(err);
- memcpy(log, base, baselen);
- if (baselen && base[baselen-1] != '/')
- log[baselen++] = '/';
+ strbuf_grow(&dirname, strlen(refname) + 1);
+ for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) {
+ /* Expand dirname to the new prefix, not including the trailing slash: */
+ strbuf_add(&dirname, refname + dirname.len, slash - refname - dirname.len);
- while ((de = readdir(dir)) != NULL) {
- struct stat st;
- int namelen;
+ /*
+ * We are still at a leading dir of the refname (e.g.,
+ * "refs/foo"; if there is a reference with that name,
+ * it is a conflict, *unless* it is in skip.
+ */
+ if (skip && string_list_has_string(skip, dirname.buf))
+ continue;
- if (de->d_name[0] == '.')
- continue;
- namelen = strlen(de->d_name);
- if (namelen > 255)
- continue;
- if (has_extension(de->d_name, ".lock"))
- continue;
- memcpy(log + baselen, de->d_name, namelen+1);
- if (stat(git_path("logs/%s", log), &st) < 0)
- continue;
- if (S_ISDIR(st.st_mode)) {
- retval = do_for_each_reflog(log, fn, cb_data);
- } else {
- unsigned char sha1[20];
- if (read_ref_full(log, sha1, 0, NULL))
- retval = error("bad ref for %s", log);
- else
- retval = fn(log, sha1, 0, cb_data);
- }
- if (retval)
- break;
+ if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent, &type)) {
+ strbuf_addf(err, _("'%s' exists; cannot create '%s'"),
+ dirname.buf, refname);
+ goto cleanup;
+ }
+
+ if (extras && string_list_has_string(extras, dirname.buf)) {
+ strbuf_addf(err, _("cannot process '%s' and '%s' at the same time"),
+ refname, dirname.buf);
+ goto cleanup;
}
- free(log);
- closedir(dir);
}
- else if (*base)
- return errno;
- return retval;
+
+ /*
+ * We are at the leaf of our refname (e.g., "refs/foo/bar").
+ * There is no point in searching for a reference with that
+ * name, because a refname isn't considered to conflict with
+ * itself. But we still need to check for references whose
+ * names are in the "refs/foo/bar/" namespace, because they
+ * *do* conflict.
+ */
+ strbuf_addstr(&dirname, refname + dirname.len);
+ strbuf_addch(&dirname, '/');
+
+ iter = refs_ref_iterator_begin(refs, dirname.buf, 0,
+ DO_FOR_EACH_INCLUDE_BROKEN);
+ while ((ok = ref_iterator_advance(iter)) == ITER_OK) {
+ if (skip &&
+ string_list_has_string(skip, iter->refname))
+ continue;
+
+ strbuf_addf(err, _("'%s' exists; cannot create '%s'"),
+ iter->refname, refname);
+ ref_iterator_abort(iter);
+ goto cleanup;
+ }
+
+ if (ok != ITER_DONE)
+ BUG("error while iterating over references");
+
+ extra_refname = find_descendant_ref(dirname.buf, extras, skip);
+ if (extra_refname)
+ strbuf_addf(err, _("cannot process '%s' and '%s' at the same time"),
+ refname, extra_refname);
+ else
+ ret = 0;
+
+cleanup:
+ strbuf_release(&referent);
+ strbuf_release(&dirname);
+ return ret;
+}
+
+int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data)
+{
+ struct ref_iterator *iter;
+ struct do_for_each_ref_help hp = { fn, cb_data };
+
+ iter = refs->be->reflog_iterator_begin(refs);
+
+ return do_for_each_repo_ref_iterator(the_repository, iter,
+ do_for_each_ref_helper, &hp);
}
int for_each_reflog(each_ref_fn fn, void *cb_data)
{
- return do_for_each_reflog("", fn, cb_data);
+ return refs_for_each_reflog(get_main_ref_store(the_repository), fn, cb_data);
}
-int update_ref(const char *action, const char *refname,
- const unsigned char *sha1, const unsigned char *oldval,
- int flags, enum action_on_err onerr)
+int refs_for_each_reflog_ent_reverse(struct ref_store *refs,
+ const char *refname,
+ each_reflog_ent_fn fn,
+ void *cb_data)
{
- static struct ref_lock *lock;
- lock = lock_any_ref_for_update(refname, oldval, flags);
- if (!lock) {
- const char *str = "Cannot lock the ref '%s'.";
- switch (onerr) {
- case MSG_ON_ERR: error(str, refname); break;
- case DIE_ON_ERR: die(str, refname); break;
- case QUIET_ON_ERR: break;
- }
- return 1;
- }
- if (write_ref_sha1(lock, sha1, action) < 0) {
- const char *str = "Cannot update the ref '%s'.";
- switch (onerr) {
- case MSG_ON_ERR: error(str, refname); break;
- case DIE_ON_ERR: die(str, refname); break;
- case QUIET_ON_ERR: break;
- }
- return 1;
- }
- return 0;
+ return refs->be->for_each_reflog_ent_reverse(refs, refname,
+ fn, cb_data);
}
-int ref_exists(const char *refname)
+int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn,
+ void *cb_data)
{
- unsigned char sha1[20];
- return !!resolve_ref_unsafe(refname, sha1, 1, NULL);
+ return refs_for_each_reflog_ent_reverse(get_main_ref_store(the_repository),
+ refname, fn, cb_data);
}
-struct ref *find_ref_by_name(const struct ref *list, const char *name)
+int refs_for_each_reflog_ent(struct ref_store *refs, const char *refname,
+ each_reflog_ent_fn fn, void *cb_data)
{
- for ( ; list; list = list->next)
- if (!strcmp(list->name, name))
- return (struct ref *)list;
- return NULL;
+ return refs->be->for_each_reflog_ent(refs, refname, fn, cb_data);
}
-/*
- * generate a format suitable for scanf from a ref_rev_parse_rules
- * rule, that is replace the "%.*s" spec with a "%s" spec
- */
-static void gen_scanf_fmt(char *scanf_fmt, const char *rule)
+int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn,
+ void *cb_data)
{
- char *spec;
+ return refs_for_each_reflog_ent(get_main_ref_store(the_repository), refname,
+ fn, cb_data);
+}
- spec = strstr(rule, "%.*s");
- if (!spec || strstr(spec + 4, "%.*s"))
- die("invalid rule in ref_rev_parse_rules: %s", rule);
+int refs_reflog_exists(struct ref_store *refs, const char *refname)
+{
+ return refs->be->reflog_exists(refs, refname);
+}
- /* copy all until spec */
- strncpy(scanf_fmt, rule, spec - rule);
- scanf_fmt[spec - rule] = '\0';
- /* copy new spec */
- strcat(scanf_fmt, "%s");
- /* copy remaining rule */
- strcat(scanf_fmt, spec + 4);
+int reflog_exists(const char *refname)
+{
+ return refs_reflog_exists(get_main_ref_store(the_repository), refname);
+}
- return;
+int refs_create_reflog(struct ref_store *refs, const char *refname,
+ int force_create, struct strbuf *err)
+{
+ return refs->be->create_reflog(refs, refname, force_create, err);
}
-char *shorten_unambiguous_ref(const char *refname, int strict)
+int safe_create_reflog(const char *refname, int force_create,
+ struct strbuf *err)
{
- int i;
- static char **scanf_fmts;
- static int nr_rules;
- char *short_name;
+ return refs_create_reflog(get_main_ref_store(the_repository), refname,
+ force_create, err);
+}
- /* pre generate scanf formats from ref_rev_parse_rules[] */
- if (!nr_rules) {
- size_t total_len = 0;
+int refs_delete_reflog(struct ref_store *refs, const char *refname)
+{
+ return refs->be->delete_reflog(refs, refname);
+}
- /* the rule list is NULL terminated, count them first */
- for (; ref_rev_parse_rules[nr_rules]; nr_rules++)
- /* no +1 because strlen("%s") < strlen("%.*s") */
- total_len += strlen(ref_rev_parse_rules[nr_rules]);
+int delete_reflog(const char *refname)
+{
+ return refs_delete_reflog(get_main_ref_store(the_repository), refname);
+}
- scanf_fmts = xmalloc(nr_rules * sizeof(char *) + total_len);
+int refs_reflog_expire(struct ref_store *refs,
+ const char *refname, const struct object_id *oid,
+ unsigned int flags,
+ reflog_expiry_prepare_fn prepare_fn,
+ reflog_expiry_should_prune_fn should_prune_fn,
+ reflog_expiry_cleanup_fn cleanup_fn,
+ void *policy_cb_data)
+{
+ return refs->be->reflog_expire(refs, refname, oid, flags,
+ prepare_fn, should_prune_fn,
+ cleanup_fn, policy_cb_data);
+}
- total_len = 0;
- for (i = 0; i < nr_rules; i++) {
- scanf_fmts[i] = (char *)&scanf_fmts[nr_rules]
- + total_len;
- gen_scanf_fmt(scanf_fmts[i], ref_rev_parse_rules[i]);
- total_len += strlen(ref_rev_parse_rules[i]);
- }
- }
+int reflog_expire(const char *refname, const struct object_id *oid,
+ unsigned int flags,
+ reflog_expiry_prepare_fn prepare_fn,
+ reflog_expiry_should_prune_fn should_prune_fn,
+ reflog_expiry_cleanup_fn cleanup_fn,
+ void *policy_cb_data)
+{
+ return refs_reflog_expire(get_main_ref_store(the_repository),
+ refname, oid, flags,
+ prepare_fn, should_prune_fn,
+ cleanup_fn, policy_cb_data);
+}
- /* bail out if there are no rules */
- if (!nr_rules)
- return xstrdup(refname);
+int initial_ref_transaction_commit(struct ref_transaction *transaction,
+ struct strbuf *err)
+{
+ struct ref_store *refs = transaction->ref_store;
- /* buffer for scanf result, at most refname must fit */
- short_name = xstrdup(refname);
+ return refs->be->initial_transaction_commit(refs, transaction, err);
+}
- /* skip first rule, it will always match */
- for (i = nr_rules - 1; i > 0 ; --i) {
- int j;
- int rules_to_fail = i;
- int short_name_len;
+int refs_delete_refs(struct ref_store *refs, const char *logmsg,
+ struct string_list *refnames, unsigned int flags)
+{
+ char *msg;
+ int retval;
- if (1 != sscanf(refname, scanf_fmts[i], short_name))
- continue;
+ msg = normalize_reflog_message(logmsg);
+ retval = refs->be->delete_refs(refs, msg, refnames, flags);
+ free(msg);
+ return retval;
+}
- short_name_len = strlen(short_name);
+int delete_refs(const char *msg, struct string_list *refnames,
+ unsigned int flags)
+{
+ return refs_delete_refs(get_main_ref_store(the_repository), msg, refnames, flags);
+}
- /*
- * in strict mode, all (except the matched one) rules
- * must fail to resolve to a valid non-ambiguous ref
- */
- if (strict)
- rules_to_fail = nr_rules;
+int refs_rename_ref(struct ref_store *refs, const char *oldref,
+ const char *newref, const char *logmsg)
+{
+ char *msg;
+ int retval;
- /*
- * check if the short name resolves to a valid ref,
- * but use only rules prior to the matched one
- */
- for (j = 0; j < rules_to_fail; j++) {
- const char *rule = ref_rev_parse_rules[j];
- char refname[PATH_MAX];
+ msg = normalize_reflog_message(logmsg);
+ retval = refs->be->rename_ref(refs, oldref, newref, msg);
+ free(msg);
+ return retval;
+}
- /* skip matched rule */
- if (i == j)
- continue;
+int rename_ref(const char *oldref, const char *newref, const char *logmsg)
+{
+ return refs_rename_ref(get_main_ref_store(the_repository), oldref, newref, logmsg);
+}
- /*
- * the short name is ambiguous, if it resolves
- * (with this previous rule) to a valid ref
- * read_ref() returns 0 on success
- */
- mksnpath(refname, sizeof(refname),
- rule, short_name_len, short_name);
- if (ref_exists(refname))
- break;
- }
+int refs_copy_existing_ref(struct ref_store *refs, const char *oldref,
+ const char *newref, const char *logmsg)
+{
+ char *msg;
+ int retval;
- /*
- * short name is non-ambiguous if all previous rules
- * haven't resolved to a valid ref
- */
- if (j == rules_to_fail)
- return short_name;
- }
+ msg = normalize_reflog_message(logmsg);
+ retval = refs->be->copy_ref(refs, oldref, newref, msg);
+ free(msg);
+ return retval;
+}
- free(short_name);
- return xstrdup(refname);
+int copy_existing_ref(const char *oldref, const char *newref, const char *logmsg)
+{
+ return refs_copy_existing_ref(get_main_ref_store(the_repository), oldref, newref, logmsg);
}