* Utilities for paths and pathnames
*/
#include "cache.h"
+#include "repository.h"
#include "strbuf.h"
#include "string-list.h"
#include "dir.h"
+#include "worktree.h"
+#include "submodule-config.h"
+#include "path.h"
+#include "packfile.h"
+#include "object-store.h"
+#include "lockfile.h"
static int get_st_mode_bits(const char *path, int *mode)
{
STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT
};
static int index;
- struct strbuf *sb = &pathname_array[3 & ++index];
+ struct strbuf *sb = &pathname_array[index];
+ index = (index + 1) % ARRAY_SIZE(pathname_array);
strbuf_reset(sb);
return sb;
}
-static char *cleanup_path(char *path)
+static const char *cleanup_path(const char *path)
{
/* Clean it up */
- if (!memcmp(path, "./", 2)) {
- path += 2;
+ if (skip_prefix(path, "./", &path)) {
while (*path == '/')
path++;
}
static void strbuf_cleanup_path(struct strbuf *sb)
{
- char *path = cleanup_path(sb->buf);
+ const char *path = cleanup_path(sb->buf);
if (path > sb->buf)
strbuf_remove(sb, 0, path - sb->buf);
}
strlcpy(buf, bad_path, n);
return buf;
}
- return cleanup_path(buf);
+ return (char *)cleanup_path(buf);
}
static int dir_prefix(const char *buf, const char *dir)
/* Not considered garbage for report_linked_checkout_garbage */
unsigned ignore_garbage:1;
unsigned is_dir:1;
- /* Not common even though its parent is */
- unsigned exclude:1;
- const char *dirname;
+ /* Belongs to the common dir, though it may contain paths that don't */
+ unsigned is_common:1;
+ const char *path;
};
static struct common_dir common_list[] = {
- { 0, 1, 0, "branches" },
- { 0, 1, 0, "hooks" },
- { 0, 1, 0, "info" },
- { 0, 0, 1, "info/sparse-checkout" },
- { 1, 1, 0, "logs" },
- { 1, 1, 1, "logs/HEAD" },
- { 0, 1, 1, "logs/refs/bisect" },
- { 0, 1, 0, "lost-found" },
- { 0, 1, 0, "objects" },
- { 0, 1, 0, "refs" },
- { 0, 1, 1, "refs/bisect" },
- { 0, 1, 0, "remotes" },
- { 0, 1, 0, "worktrees" },
- { 0, 1, 0, "rr-cache" },
- { 0, 1, 0, "svn" },
- { 0, 0, 0, "config" },
- { 1, 0, 0, "gc.pid" },
- { 0, 0, 0, "packed-refs" },
- { 0, 0, 0, "shallow" },
+ { 0, 1, 1, "branches" },
+ { 0, 1, 1, "common" },
+ { 0, 1, 1, "hooks" },
+ { 0, 1, 1, "info" },
+ { 0, 0, 0, "info/sparse-checkout" },
+ { 1, 1, 1, "logs" },
+ { 1, 0, 0, "logs/HEAD" },
+ { 0, 1, 0, "logs/refs/bisect" },
+ { 0, 1, 0, "logs/refs/rewritten" },
+ { 0, 1, 0, "logs/refs/worktree" },
+ { 0, 1, 1, "lost-found" },
+ { 0, 1, 1, "objects" },
+ { 0, 1, 1, "refs" },
+ { 0, 1, 0, "refs/bisect" },
+ { 0, 1, 0, "refs/rewritten" },
+ { 0, 1, 0, "refs/worktree" },
+ { 0, 1, 1, "remotes" },
+ { 0, 1, 1, "worktrees" },
+ { 0, 1, 1, "rr-cache" },
+ { 0, 1, 1, "svn" },
+ { 0, 0, 1, "config" },
+ { 1, 0, 1, "gc.pid" },
+ { 0, 0, 1, "packed-refs" },
+ { 0, 0, 1, "shallow" },
{ 0, 0, 0, NULL }
};
* definite
* definition
*
- * The trie would look look like:
+ * The trie would look like:
* root: len = 0, children a and d non-NULL, value = NULL.
* a: len = 2, contents = bc, value = (data for "abc")
* d: len = 2, contents = ef, children i non-NULL, value = (data for "def")
* Split this node: child will contain this node's
* existing children.
*/
- child = malloc(sizeof(*child));
+ child = xmalloc(sizeof(*child));
memcpy(child->children, root->children, sizeof(root->children));
child->len = root->len - i - 1;
return old;
}
-typedef int (*match_fn)(const char *unmatched, void *data, void *baton);
+typedef int (*match_fn)(const char *unmatched, void *value, void *baton);
/*
* Search a trie for some key. Find the longest /-or-\0-terminated
- * prefix of the key for which the trie contains a value. Call fn
- * with the unmatched portion of the key and the found value, and
- * return its return value. If there is no such prefix, return -1.
+ * prefix of the key for which the trie contains a value. If there is
+ * no such prefix, return -1. Otherwise call fn with the unmatched
+ * portion of the key and the found value. If fn returns 0 or
+ * positive, then return its return value. If fn returns negative,
+ * then call fn with the next-longest /-terminated prefix of the key
+ * (i.e. a parent directory) for which the trie contains a value, and
+ * handle its return value the same way. If there is no shorter
+ * /-terminated prefix with a value left, then return the negative
+ * return value of the most recent fn invocation.
*
* The key is partially normalized: consecutive slashes are skipped.
*
- * For example, consider the trie containing only [refs,
- * refs/worktree] (both with values).
- *
- * | key | unmatched | val from node | return value |
- * |-----------------|------------|---------------|--------------|
- * | a | not called | n/a | -1 |
- * | refs | \0 | refs | as per fn |
- * | refs/ | / | refs | as per fn |
- * | refs/w | /w | refs | as per fn |
- * | refs/worktree | \0 | refs/worktree | as per fn |
- * | refs/worktree/ | / | refs/worktree | as per fn |
- * | refs/worktree/a | /a | refs/worktree | as per fn |
- * |-----------------|------------|---------------|--------------|
+ * For example, consider the trie containing only [logs,
+ * logs/refs/bisect], both with values, but not logs/refs.
*
+ * | key | unmatched | prefix to node | return value |
+ * |--------------------|----------------|------------------|--------------|
+ * | a | not called | n/a | -1 |
+ * | logstore | not called | n/a | -1 |
+ * | logs | \0 | logs | as per fn |
+ * | logs/ | / | logs | as per fn |
+ * | logs/refs | /refs | logs | as per fn |
+ * | logs/refs/ | /refs/ | logs | as per fn |
+ * | logs/refs/b | /refs/b | logs | as per fn |
+ * | logs/refs/bisected | /refs/bisected | logs | as per fn |
+ * | logs/refs/bisect | \0 | logs/refs/bisect | as per fn |
+ * | logs/refs/bisect/ | / | logs/refs/bisect | as per fn |
+ * | logs/refs/bisect/a | /a | logs/refs/bisect | as per fn |
+ * | (If fn in the previous line returns -1, then fn is called once more:) |
+ * | logs/refs/bisect/a | /refs/bisect/a | logs | as per fn |
+ * |--------------------|----------------|------------------|--------------|
*/
static int trie_find(struct trie *root, const char *key, match_fn fn,
void *baton)
/* Matched the entire compressed section */
key += i;
- if (!*key)
+ if (!*key) {
/* End of key */
- return fn(key, root->value, baton);
+ if (root->value)
+ return fn(key, root->value, baton);
+ else
+ return -1;
+ }
/* Partial path normalization: skip consecutive slashes */
while (key[0] == '/' && key[1] == '/')
if (common_trie_done_setup)
return;
- for (p = common_list; p->dirname; p++)
- add_to_trie(&common_trie, p->dirname, p);
+ for (p = common_list; p->path; p++)
+ add_to_trie(&common_trie, p->path, p);
common_trie_done_setup = 1;
}
{
struct common_dir *dir = value;
- if (!dir)
- return 0;
-
if (dir->is_dir && (unmatched[0] == 0 || unmatched[0] == '/'))
- return !dir->exclude;
+ return dir->is_common;
if (!dir->is_dir && unmatched[0] == 0)
- return !dir->exclude;
+ return dir->is_common;
return 0;
}
const char *common_dir)
{
char *base = buf->buf + git_dir_len;
+ int has_lock_suffix = strbuf_strip_suffix(buf, LOCK_SUFFIX);
+
init_common_trie();
- if (!common_dir)
- common_dir = get_git_common_dir();
if (trie_find(&common_trie, base, check_common, NULL) > 0)
replace_dir(buf, git_dir_len, common_dir);
+
+ if (has_lock_suffix)
+ strbuf_addstr(buf, LOCK_SUFFIX);
}
void report_linked_checkout_garbage(void)
const struct common_dir *p;
int len;
- if (!git_common_dir_env)
+ if (!the_repository->different_commondir)
return;
strbuf_addf(&sb, "%s/", get_git_dir());
len = sb.len;
- for (p = common_list; p->dirname; p++) {
- const char *path = p->dirname;
+ for (p = common_list; p->path; p++) {
+ const char *path = p->path;
if (p->ignore_garbage)
continue;
strbuf_setlen(&sb, len);
strbuf_release(&sb);
}
-static void adjust_git_path(struct strbuf *buf, int git_dir_len)
+static void adjust_git_path(const struct repository *repo,
+ struct strbuf *buf, int git_dir_len)
{
const char *base = buf->buf + git_dir_len;
- if (git_graft_env && is_dir_file(base, "info", "grafts"))
+ if (is_dir_file(base, "info", "grafts"))
strbuf_splice(buf, 0, buf->len,
- get_graft_file(), strlen(get_graft_file()));
- else if (git_index_env && !strcmp(base, "index"))
+ repo->graft_file, strlen(repo->graft_file));
+ else if (!strcmp(base, "index"))
strbuf_splice(buf, 0, buf->len,
- get_index_file(), strlen(get_index_file()));
- else if (git_db_env && dir_prefix(base, "objects"))
- replace_dir(buf, git_dir_len + 7, get_object_directory());
- else if (git_common_dir_env)
- update_common_dir(buf, git_dir_len, NULL);
+ repo->index_file, strlen(repo->index_file));
+ else if (dir_prefix(base, "objects"))
+ replace_dir(buf, git_dir_len + 7, repo->objects->odb->path);
+ else if (git_hooks_path && dir_prefix(base, "hooks"))
+ replace_dir(buf, git_dir_len + 5, git_hooks_path);
+ else if (repo->different_commondir)
+ update_common_dir(buf, git_dir_len, repo->commondir);
+}
+
+static void strbuf_worktree_gitdir(struct strbuf *buf,
+ const struct repository *repo,
+ const struct worktree *wt)
+{
+ if (!wt)
+ strbuf_addstr(buf, repo->gitdir);
+ else if (!wt->id)
+ strbuf_addstr(buf, repo->commondir);
+ else
+ strbuf_git_common_path(buf, repo, "worktrees/%s", wt->id);
}
-static void do_git_path(struct strbuf *buf, const char *fmt, va_list args)
+static void do_git_path(const struct repository *repo,
+ const struct worktree *wt, struct strbuf *buf,
+ const char *fmt, va_list args)
{
int gitdir_len;
- strbuf_addstr(buf, get_git_dir());
+ strbuf_worktree_gitdir(buf, repo, wt);
if (buf->len && !is_dir_sep(buf->buf[buf->len - 1]))
strbuf_addch(buf, '/');
gitdir_len = buf->len;
strbuf_vaddf(buf, fmt, args);
- adjust_git_path(buf, gitdir_len);
+ if (!wt)
+ adjust_git_path(repo, buf, gitdir_len);
strbuf_cleanup_path(buf);
}
+char *repo_git_path(const struct repository *repo,
+ const char *fmt, ...)
+{
+ struct strbuf path = STRBUF_INIT;
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(repo, NULL, &path, fmt, args);
+ va_end(args);
+ return strbuf_detach(&path, NULL);
+}
+
+void strbuf_repo_git_path(struct strbuf *sb,
+ const struct repository *repo,
+ const char *fmt, ...)
+{
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(repo, NULL, sb, fmt, args);
+ va_end(args);
+}
+
char *git_path_buf(struct strbuf *buf, const char *fmt, ...)
{
va_list args;
strbuf_reset(buf);
va_start(args, fmt);
- do_git_path(buf, fmt, args);
+ do_git_path(the_repository, NULL, buf, fmt, args);
va_end(args);
return buf->buf;
}
{
va_list args;
va_start(args, fmt);
- do_git_path(sb, fmt, args);
+ do_git_path(the_repository, NULL, sb, fmt, args);
va_end(args);
}
struct strbuf *pathname = get_pathname();
va_list args;
va_start(args, fmt);
- do_git_path(pathname, fmt, args);
+ do_git_path(the_repository, NULL, pathname, fmt, args);
va_end(args);
return pathname->buf;
}
struct strbuf path = STRBUF_INIT;
va_list args;
va_start(args, fmt);
- do_git_path(&path, fmt, args);
+ do_git_path(the_repository, NULL, &path, fmt, args);
va_end(args);
return strbuf_detach(&path, NULL);
}
return cleanup_path(pathname->buf);
}
-static void do_submodule_path(struct strbuf *buf, const char *path,
- const char *fmt, va_list args)
+const char *worktree_git_path(const struct worktree *wt, const char *fmt, ...)
+{
+ struct strbuf *pathname = get_pathname();
+ va_list args;
+ va_start(args, fmt);
+ do_git_path(the_repository, wt, pathname, fmt, args);
+ va_end(args);
+ return pathname->buf;
+}
+
+static void do_worktree_path(const struct repository *repo,
+ struct strbuf *buf,
+ const char *fmt, va_list args)
+{
+ strbuf_addstr(buf, repo->worktree);
+ if(buf->len && !is_dir_sep(buf->buf[buf->len - 1]))
+ strbuf_addch(buf, '/');
+
+ strbuf_vaddf(buf, fmt, args);
+ strbuf_cleanup_path(buf);
+}
+
+char *repo_worktree_path(const struct repository *repo, const char *fmt, ...)
+{
+ struct strbuf path = STRBUF_INIT;
+ va_list args;
+
+ if (!repo->worktree)
+ return NULL;
+
+ va_start(args, fmt);
+ do_worktree_path(repo, &path, fmt, args);
+ va_end(args);
+
+ return strbuf_detach(&path, NULL);
+}
+
+void strbuf_repo_worktree_path(struct strbuf *sb,
+ const struct repository *repo,
+ const char *fmt, ...)
+{
+ va_list args;
+
+ if (!repo->worktree)
+ return;
+
+ va_start(args, fmt);
+ do_worktree_path(repo, sb, fmt, args);
+ va_end(args);
+}
+
+/* Returns 0 on success, negative on failure. */
+static int do_submodule_path(struct strbuf *buf, const char *path,
+ const char *fmt, va_list args)
{
- const char *git_dir;
struct strbuf git_submodule_common_dir = STRBUF_INIT;
struct strbuf git_submodule_dir = STRBUF_INIT;
+ int ret;
- strbuf_addstr(buf, path);
- strbuf_complete(buf, '/');
- strbuf_addstr(buf, ".git");
-
- git_dir = read_gitfile(buf->buf);
- if (git_dir) {
- strbuf_reset(buf);
- strbuf_addstr(buf, git_dir);
- }
- strbuf_addch(buf, '/');
- strbuf_addstr(&git_submodule_dir, buf->buf);
+ ret = submodule_to_gitdir(&git_submodule_dir, path);
+ if (ret)
+ goto cleanup;
+ strbuf_complete(&git_submodule_dir, '/');
+ strbuf_addbuf(buf, &git_submodule_dir);
strbuf_vaddf(buf, fmt, args);
if (get_common_dir_noenv(&git_submodule_common_dir, git_submodule_dir.buf))
strbuf_cleanup_path(buf);
+cleanup:
strbuf_release(&git_submodule_dir);
strbuf_release(&git_submodule_common_dir);
+ return ret;
}
char *git_pathdup_submodule(const char *path, const char *fmt, ...)
{
+ int err;
va_list args;
struct strbuf buf = STRBUF_INIT;
va_start(args, fmt);
- do_submodule_path(&buf, path, fmt, args);
+ err = do_submodule_path(&buf, path, fmt, args);
va_end(args);
+ if (err) {
+ strbuf_release(&buf);
+ return NULL;
+ }
return strbuf_detach(&buf, NULL);
}
-void strbuf_git_path_submodule(struct strbuf *buf, const char *path,
- const char *fmt, ...)
+int strbuf_git_path_submodule(struct strbuf *buf, const char *path,
+ const char *fmt, ...)
+{
+ int err;
+ va_list args;
+ va_start(args, fmt);
+ err = do_submodule_path(buf, path, fmt, args);
+ va_end(args);
+
+ return err;
+}
+
+static void do_git_common_path(const struct repository *repo,
+ struct strbuf *buf,
+ const char *fmt,
+ va_list args)
+{
+ strbuf_addstr(buf, repo->commondir);
+ if (buf->len && !is_dir_sep(buf->buf[buf->len - 1]))
+ strbuf_addch(buf, '/');
+ strbuf_vaddf(buf, fmt, args);
+ strbuf_cleanup_path(buf);
+}
+
+const char *git_common_path(const char *fmt, ...)
+{
+ struct strbuf *pathname = get_pathname();
+ va_list args;
+ va_start(args, fmt);
+ do_git_common_path(the_repository, pathname, fmt, args);
+ va_end(args);
+ return pathname->buf;
+}
+
+void strbuf_git_common_path(struct strbuf *sb,
+ const struct repository *repo,
+ const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
- do_submodule_path(buf, path, fmt, args);
+ do_git_common_path(repo, sb, fmt, args);
va_end(args);
}
int validate_headref(const char *path)
{
struct stat st;
- char *buf, buffer[256];
- unsigned char sha1[20];
+ char buffer[256];
+ const char *refname;
+ struct object_id oid;
int fd;
ssize_t len;
len = read_in_full(fd, buffer, sizeof(buffer)-1);
close(fd);
+ if (len < 0)
+ return -1;
+ buffer[len] = '\0';
+
/*
* Is it a symbolic ref?
*/
- if (len < 4)
- return -1;
- if (!memcmp("ref:", buffer, 4)) {
- buf = buffer + 4;
- len -= 4;
- while (len && isspace(*buf))
- buf++, len--;
- if (len >= 5 && !memcmp("refs/", buf, 5))
+ if (skip_prefix(buffer, "ref:", &refname)) {
+ while (isspace(*refname))
+ refname++;
+ if (starts_with(refname, "refs/"))
return 0;
}
/*
* Is this a detached HEAD?
*/
- if (!get_sha1_hex(buffer, sha1))
+ if (!get_oid_hex(buffer, &oid))
return 0;
return -1;
* Return a string with ~ and ~user expanded via getpw*. If buf != NULL,
* then it is a newly allocated string. Returns NULL on getpw failure or
* if path is NULL.
+ *
+ * If real_home is true, strbuf_realpath($HOME) is used in the expansion.
*/
-char *expand_user_path(const char *path)
+char *expand_user_path(const char *path, int real_home)
{
struct strbuf user_path = STRBUF_INIT;
const char *to_copy = path;
const char *home = getenv("HOME");
if (!home)
goto return_null;
- strbuf_addstr(&user_path, home);
+ if (real_home)
+ strbuf_add_real_path(&user_path, home);
+ else
+ strbuf_addstr(&user_path, home);
#ifdef GIT_WINDOWS_NATIVE
convert_slashes(user_path.buf);
#endif
strbuf_add(&validated_path, path, len);
if (used_path.buf[0] == '~') {
- char *newpath = expand_user_path(used_path.buf);
+ char *newpath = expand_user_path(used_path.buf, 0);
if (!newpath)
return NULL;
strbuf_attach(&used_path, newpath, strlen(newpath),
}
if (is_git_directory(".")) {
- set_git_dir(".");
- check_repository_format();
+ set_git_dir(".", 0);
+ check_repository_format(NULL);
return path;
}
{
int tweak;
- if (shared_repository < 0)
- tweak = -shared_repository;
+ if (get_shared_repository() < 0)
+ tweak = -get_shared_repository();
else
- tweak = shared_repository;
+ tweak = get_shared_repository();
if (!(mode & S_IWUSR))
tweak &= ~0222;
if (mode & S_IXUSR)
/* Copy read bits to execute bits */
tweak |= (tweak & 0444) >> 2;
- if (shared_repository < 0)
+ if (get_shared_repository() < 0)
mode = (mode & ~0777) | tweak;
else
mode |= tweak;
{
int old_mode, new_mode;
- if (!shared_repository)
+ if (!get_shared_repository())
return 0;
if (get_st_mode_bits(path, &old_mode) < 0)
return -1;
/*
* It is okay if dst == src, but they should not overlap otherwise.
+ * The "dst" buffer must be at least as long as "src"; normalizing may shrink
+ * the size of the path, but will never grow it.
*
* Performs the following normalizations on src, storing the result in dst:
* - Ensures that components are separated by '/' (Windows only)
- * - Squashes sequences of '/'.
+ * - Squashes sequences of '/' except "//server/share" on Windows
* - Removes "." components.
* - Removes ".." components, and the components the precede them.
* Returns failure (non-zero) if a ".." component appears as first path
int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
{
char *dst0;
- int i;
+ const char *end;
- for (i = has_dos_drive_prefix(src); i > 0; i--)
- *dst++ = *src++;
+ /*
+ * Copy initial part of absolute path: "/", "C:/", "//server/share/".
+ */
+ end = src + offset_1st_component(src);
+ while (src < end) {
+ char c = *src++;
+ if (is_dir_sep(c))
+ c = '/';
+ *dst++ = c;
+ }
dst0 = dst;
- if (is_dir_sep(*src)) {
- *dst++ = '/';
- while (is_dir_sep(*src))
- src++;
- }
+ while (is_dir_sep(*src))
+ src++;
for (;;) {
char c = *src;
}
/*
- * If path ends with suffix (complete path components), returns the
- * part before suffix (sans trailing directory separators).
- * Otherwise returns NULL.
+ * If path ends with suffix (complete path components), returns the offset of
+ * the last character in the path before the suffix (sans trailing directory
+ * separators), and -1 otherwise.
*/
-char *strip_path_suffix(const char *path, const char *suffix)
+static ssize_t stripped_path_suffix_offset(const char *path, const char *suffix)
{
int path_len = strlen(path), suffix_len = strlen(suffix);
while (suffix_len) {
if (!path_len)
- return NULL;
+ return -1;
if (is_dir_sep(path[path_len - 1])) {
if (!is_dir_sep(suffix[suffix_len - 1]))
- return NULL;
+ return -1;
path_len = chomp_trailing_dir_sep(path, path_len);
suffix_len = chomp_trailing_dir_sep(suffix, suffix_len);
}
else if (path[--path_len] != suffix[--suffix_len])
- return NULL;
+ return -1;
}
if (path_len && !is_dir_sep(path[path_len - 1]))
- return NULL;
- return xstrndup(path, chomp_trailing_dir_sep(path, path_len));
+ return -1;
+ return chomp_trailing_dir_sep(path, path_len);
+}
+
+/*
+ * Returns true if the path ends with components, considering only complete path
+ * components, and false otherwise.
+ */
+int ends_with_path_components(const char *path, const char *components)
+{
+ return stripped_path_suffix_offset(path, components) != -1;
+}
+
+/*
+ * If path ends with suffix (complete path components), returns the
+ * part before suffix (sans trailing directory separators).
+ * Otherwise returns NULL.
+ */
+char *strip_path_suffix(const char *path, const char *suffix)
+{
+ ssize_t offset = stripped_path_suffix_offset(path, suffix);
+
+ return offset == -1 ? NULL : xstrndup(path, offset);
}
int daemon_avoid_alias(const char *p)
}
}
-static int only_spaces_and_periods(const char *path, size_t len, size_t skip)
+/*
+ * On NTFS, we need to be careful to disallow certain synonyms of the `.git/`
+ * directory:
+ *
+ * - For historical reasons, file names that end in spaces or periods are
+ * automatically trimmed. Therefore, `.git . . ./` is a valid way to refer
+ * to `.git/`.
+ *
+ * - For other historical reasons, file names that do not conform to the 8.3
+ * format (up to eight characters for the basename, three for the file
+ * extension, certain characters not allowed such as `+`, etc) are associated
+ * with a so-called "short name", at least on the `C:` drive by default.
+ * Which means that `git~1/` is a valid way to refer to `.git/`.
+ *
+ * Note: Technically, `.git/` could receive the short name `git~2` if the
+ * short name `git~1` were already used. In Git, however, we guarantee that
+ * `.git` is the first item in a directory, therefore it will be associated
+ * with the short name `git~1` (unless short names are disabled).
+ *
+ * - For yet other historical reasons, NTFS supports so-called "Alternate Data
+ * Streams", i.e. metadata associated with a given file, referred to via
+ * `<filename>:<stream-name>:<stream-type>`. There exists a default stream
+ * type for directories, allowing `.git/` to be accessed via
+ * `.git::$INDEX_ALLOCATION/`.
+ *
+ * When this function returns 1, it indicates that the specified file/directory
+ * name refers to a `.git` file or directory, or to any of these synonyms, and
+ * Git should therefore not track it.
+ *
+ * For performance reasons, _all_ Alternate Data Streams of `.git/` are
+ * forbidden, not just `::$INDEX_ALLOCATION`.
+ *
+ * This function is intended to be used by `git fsck` even on platforms where
+ * the backslash is a regular filename character, therefore it needs to handle
+ * backlash characters in the provided `name` specially: they are interpreted
+ * as directory separators.
+ */
+int is_ntfs_dotgit(const char *name)
{
- if (len < skip)
+ char c;
+
+ /*
+ * Note that when we don't find `.git` or `git~1` we end up with `name`
+ * advanced partway through the string. That's okay, though, as we
+ * return immediately in those cases, without looking at `name` any
+ * further.
+ */
+ c = *(name++);
+ if (c == '.') {
+ /* .git */
+ if (((c = *(name++)) != 'g' && c != 'G') ||
+ ((c = *(name++)) != 'i' && c != 'I') ||
+ ((c = *(name++)) != 't' && c != 'T'))
+ return 0;
+ } else if (c == 'g' || c == 'G') {
+ /* git ~1 */
+ if (((c = *(name++)) != 'i' && c != 'I') ||
+ ((c = *(name++)) != 't' && c != 'T') ||
+ *(name++) != '~' ||
+ *(name++) != '1')
+ return 0;
+ } else
return 0;
- len -= skip;
- path += skip;
- while (len-- > 0) {
- char c = *(path++);
- if (c != ' ' && c != '.')
+
+ for (;;) {
+ c = *(name++);
+ if (!c || c == '\\' || c == '/' || c == ':')
+ return 1;
+ if (c != '.' && c != ' ')
return 0;
}
- return 1;
}
-int is_ntfs_dotgit(const char *name)
+static int is_ntfs_dot_generic(const char *name,
+ const char *dotgit_name,
+ size_t len,
+ const char *dotgit_ntfs_shortname_prefix)
{
- int len;
-
- for (len = 0; ; len++)
- if (!name[len] || name[len] == '\\' || is_dir_sep(name[len])) {
- if (only_spaces_and_periods(name, len, 4) &&
- !strncasecmp(name, ".git", 4))
- return 1;
- if (only_spaces_and_periods(name, len, 5) &&
- !strncasecmp(name, "git~1", 5))
+ int saw_tilde;
+ size_t i;
+
+ if ((name[0] == '.' && !strncasecmp(name + 1, dotgit_name, len))) {
+ i = len + 1;
+only_spaces_and_periods:
+ for (;;) {
+ char c = name[i++];
+ if (!c || c == ':')
return 1;
- if (name[len] != '\\')
+ if (c != ' ' && c != '.')
return 0;
- name += len + 1;
- len = -1;
}
+ }
+
+ /*
+ * Is it a regular NTFS short name, i.e. shortened to 6 characters,
+ * followed by ~1, ... ~4?
+ */
+ if (!strncasecmp(name, dotgit_name, 6) && name[6] == '~' &&
+ name[7] >= '1' && name[7] <= '4') {
+ i = 8;
+ goto only_spaces_and_periods;
+ }
+
+ /*
+ * Is it a fall-back NTFS short name (for details, see
+ * https://en.wikipedia.org/wiki/8.3_filename?
+ */
+ for (i = 0, saw_tilde = 0; i < 8; i++)
+ if (name[i] == '\0')
+ return 0;
+ else if (saw_tilde) {
+ if (name[i] < '0' || name[i] > '9')
+ return 0;
+ } else if (name[i] == '~') {
+ if (name[++i] < '1' || name[i] > '9')
+ return 0;
+ saw_tilde = 1;
+ } else if (i >= 6)
+ return 0;
+ else if (name[i] & 0x80) {
+ /*
+ * We know our needles contain only ASCII, so we clamp
+ * here to make the results of tolower() sane.
+ */
+ return 0;
+ } else if (tolower(name[i]) != dotgit_ntfs_shortname_prefix[i])
+ return 0;
+
+ goto only_spaces_and_periods;
+}
+
+/*
+ * Inline helper to make sure compiler resolves strlen() on literals at
+ * compile time.
+ */
+static inline int is_ntfs_dot_str(const char *name, const char *dotgit_name,
+ const char *dotgit_ntfs_shortname_prefix)
+{
+ return is_ntfs_dot_generic(name, dotgit_name, strlen(dotgit_name),
+ dotgit_ntfs_shortname_prefix);
+}
+
+int is_ntfs_dotgitmodules(const char *name)
+{
+ return is_ntfs_dot_str(name, "gitmodules", "gi7eba");
+}
+
+int is_ntfs_dotgitignore(const char *name)
+{
+ return is_ntfs_dot_str(name, "gitignore", "gi250a");
+}
+
+int is_ntfs_dotgitattributes(const char *name)
+{
+ return is_ntfs_dot_str(name, "gitattributes", "gi7d29");
+}
+
+int looks_like_command_line_option(const char *str)
+{
+ return str && str[0] == '-';
}
char *xdg_config_home(const char *filename)
return NULL;
}
-GIT_PATH_FUNC(git_path_cherry_pick_head, "CHERRY_PICK_HEAD")
-GIT_PATH_FUNC(git_path_revert_head, "REVERT_HEAD")
-GIT_PATH_FUNC(git_path_squash_msg, "SQUASH_MSG")
-GIT_PATH_FUNC(git_path_merge_msg, "MERGE_MSG")
-GIT_PATH_FUNC(git_path_merge_rr, "MERGE_RR")
-GIT_PATH_FUNC(git_path_merge_mode, "MERGE_MODE")
-GIT_PATH_FUNC(git_path_merge_head, "MERGE_HEAD")
-GIT_PATH_FUNC(git_path_fetch_head, "FETCH_HEAD")
-GIT_PATH_FUNC(git_path_shallow, "shallow")
+char *xdg_cache_home(const char *filename)
+{
+ const char *home, *cache_home;
+
+ assert(filename);
+ cache_home = getenv("XDG_CACHE_HOME");
+ if (cache_home && *cache_home)
+ return mkpathdup("%s/git/%s", cache_home, filename);
+
+ home = getenv("HOME");
+ if (home)
+ return mkpathdup("%s/.cache/git/%s", home, filename);
+ return NULL;
+}
+
+REPO_GIT_PATH_FUNC(squash_msg, "SQUASH_MSG")
+REPO_GIT_PATH_FUNC(merge_msg, "MERGE_MSG")
+REPO_GIT_PATH_FUNC(merge_rr, "MERGE_RR")
+REPO_GIT_PATH_FUNC(merge_mode, "MERGE_MODE")
+REPO_GIT_PATH_FUNC(merge_head, "MERGE_HEAD")
+REPO_GIT_PATH_FUNC(merge_autostash, "MERGE_AUTOSTASH")
+REPO_GIT_PATH_FUNC(fetch_head, "FETCH_HEAD")
+REPO_GIT_PATH_FUNC(shallow, "shallow")
projects / platform / upstream / git.git / blobdiff