*/
#define NO_THE_INDEX_COMPATIBILITY_MACROS
#include "cache.h"
+#include "config.h"
+#include "tempfile.h"
#include "lockfile.h"
#include "cache-tree.h"
#include "refs.h"
#include "strbuf.h"
#include "varint.h"
#include "split-index.h"
-#include "sigchain.h"
#include "utf8.h"
-static struct cache_entry *refresh_cache_entry(struct cache_entry *ce,
- unsigned int options);
-
/* Mask for the name length in ce_flags in the on-disk index */
#define CE_NAMEMASK (0x0fff)
#define CACHE_EXT_TREE 0x54524545 /* "TREE" */
#define CACHE_EXT_RESOLVE_UNDO 0x52455543 /* "REUC" */
#define CACHE_EXT_LINK 0x6c696e6b /* "link" */
+#define CACHE_EXT_UNTRACKED 0x554E5452 /* "UNTR" */
/* changes that can be kept in $GIT_DIR/index (basically all extensions) */
#define EXTMASK (RESOLVE_UNDO_CHANGED | CACHE_TREE_CHANGED | \
CE_ENTRY_ADDED | CE_ENTRY_REMOVED | CE_ENTRY_CHANGED | \
- SPLIT_INDEX_ORDERED)
+ SPLIT_INDEX_ORDERED | UNTRACKED_CHANGED)
struct index_state the_index;
static const char *alternate_index_output;
memcpy(new->name, new_name, namelen + 1);
cache_tree_invalidate_path(istate, old->name);
+ untracked_cache_remove_from_index(istate, old->name);
remove_index_entry_at(istate, nr);
add_index_entry(istate, new, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE);
}
static int ce_compare_data(const struct cache_entry *ce, struct stat *st)
{
int match = -1;
- int fd = open(ce->name, O_RDONLY);
+ int fd = git_open_cloexec(ce->name, O_RDONLY);
if (fd >= 0) {
- unsigned char sha1[20];
- if (!index_fd(sha1, fd, st, OBJ_BLOB, ce->name, 0))
- match = hashcmp(sha1, ce->sha1);
+ struct object_id oid;
+ if (!index_fd(&oid, fd, st, OBJ_BLOB, ce->name, 0))
+ match = oidcmp(&oid, &ce->oid);
/* index_fd() closed the file descriptor already */
}
return match;
if (strbuf_readlink(&sb, ce->name, expected_size))
return -1;
- buffer = read_sha1_file(ce->sha1, &type, &size);
+ buffer = read_sha1_file(ce->oid.hash, &type, &size);
if (buffer) {
if (size == sb.len)
match = memcmp(buffer, sb.buf, size);
*/
if (resolve_gitlink_ref(ce->name, "HEAD", sha1) < 0)
return 0;
- return hashcmp(sha1, ce->sha1);
+ return hashcmp(sha1, ce->oid.hash);
}
static int ce_modified_check_fs(const struct cache_entry *ce, struct stat *st)
case S_IFDIR:
if (S_ISGITLINK(ce->ce_mode))
return ce_compare_gitlink(ce) ? DATA_CHANGED : 0;
+ /* else fallthrough */
default:
return TYPE_CHANGED;
}
/* Racily smudged entry? */
if (!ce->ce_stat_data.sd_size) {
- if (!is_empty_blob_sha1(ce->sha1))
+ if (!is_empty_blob_sha1(ce->oid.hash))
changed |= DATA_CHANGED;
}
return changed;
}
-static int is_racy_timestamp(const struct index_state *istate,
- const struct cache_entry *ce)
+static int is_racy_stat(const struct index_state *istate,
+ const struct stat_data *sd)
{
- return (!S_ISGITLINK(ce->ce_mode) &&
- istate->timestamp.sec &&
+ return (istate->timestamp.sec &&
#ifdef USE_NSEC
/* nanosecond timestamped files can also be racy! */
- (istate->timestamp.sec < ce->ce_stat_data.sd_mtime.sec ||
- (istate->timestamp.sec == ce->ce_stat_data.sd_mtime.sec &&
- istate->timestamp.nsec <= ce->ce_stat_data.sd_mtime.nsec))
+ (istate->timestamp.sec < sd->sd_mtime.sec ||
+ (istate->timestamp.sec == sd->sd_mtime.sec &&
+ istate->timestamp.nsec <= sd->sd_mtime.nsec))
#else
- istate->timestamp.sec <= ce->ce_stat_data.sd_mtime.sec
+ istate->timestamp.sec <= sd->sd_mtime.sec
#endif
- );
+ );
+}
+
+static int is_racy_timestamp(const struct index_state *istate,
+ const struct cache_entry *ce)
+{
+ return (!S_ISGITLINK(ce->ce_mode) &&
+ is_racy_stat(istate, &ce->ce_stat_data));
+}
+
+int match_stat_data_racy(const struct index_state *istate,
+ const struct stat_data *sd, struct stat *st)
+{
+ if (is_racy_stat(istate, sd))
+ return MTIME_CHANGED;
+ return match_stat_data(sd, st);
}
int ie_match_stat(const struct index_state *istate,
* by definition never matches what is in the work tree until it
* actually gets added.
*/
- if (ce->ce_flags & CE_INTENT_TO_ADD)
+ if (ce_intent_to_add(ce))
return DATA_CHANGED | TYPE_CHANGED | MODE_CHANGED;
changed = ce_match_stat_basic(ce, st);
return index_name_stage_pos(istate, name, namelen, 0);
}
-/* Remove entry, return true if there are more entries to go.. */
int remove_index_entry_at(struct index_state *istate, int pos)
{
struct cache_entry *ce = istate->cache[pos];
istate->cache_nr--;
if (pos >= istate->cache_nr)
return 0;
- memmove(istate->cache + pos,
- istate->cache + pos + 1,
- (istate->cache_nr - pos) * sizeof(struct cache_entry *));
+ MOVE_ARRAY(istate->cache + pos, istate->cache + pos + 1,
+ istate->cache_nr - pos);
return 1;
}
if (pos < 0)
pos = -pos-1;
cache_tree_invalidate_path(istate, path);
+ untracked_cache_remove_from_index(istate, path);
while (pos < istate->cache_nr && !strcmp(istate->cache[pos]->name, path))
remove_index_entry_at(istate, pos);
return 0;
unsigned char sha1[20];
if (write_sha1_file("", 0, blob_type, sha1))
die("cannot create an empty blob in the object database");
- hashcpy(ce->sha1, sha1);
+ hashcpy(ce->oid.hash, sha1);
}
int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags)
else
ce->ce_flags |= CE_INTENT_TO_ADD;
- if (trust_executable_bit && has_symlinks)
+
+ if (trust_executable_bit && has_symlinks) {
ce->ce_mode = create_ce_mode(st_mode);
- else {
+ } else {
/* If there is an existing entry, pick the mode bits and type
* from it, otherwise assume unexecutable regular file.
*/
* entry's directory case.
*/
if (ignore_case) {
- const char *startPtr = ce->name;
- const char *ptr = startPtr;
- while (*ptr) {
- while (*ptr && *ptr != '/')
- ++ptr;
- if (*ptr == '/') {
- struct cache_entry *foundce;
- ++ptr;
- foundce = index_dir_exists(istate, ce->name, ptr - ce->name - 1);
- if (foundce) {
- memcpy((void *)startPtr, foundce->name + (startPtr - ce->name), ptr - startPtr);
- startPtr = ptr;
- }
- }
- }
+ adjust_dirname_case(istate, ce->name);
}
alias = index_file_exists(istate, ce->name, ce_namelen(ce), ignore_case);
return 0;
}
if (!intent_only) {
- if (index_path(ce->sha1, path, st, HASH_WRITE_OBJECT)) {
+ if (index_path(&ce->oid, path, st, HASH_WRITE_OBJECT)) {
free(ce);
return error("unable to index file %s", path);
}
/* It was suspected to be racily clean, but it turns out to be Ok */
was_same = (alias &&
!ce_stage(alias) &&
- !hashcmp(alias->sha1, ce->sha1) &&
+ !oidcmp(&alias->oid, &ce->oid) &&
ce->ce_mode == alias->ce_mode);
if (pretend)
size = cache_entry_size(len);
ce = xcalloc(1, size);
- hashcpy(ce->sha1, sha1);
+ hashcpy(ce->oid.hash, sha1);
memcpy(ce->name, path, len);
ce->ce_flags = create_ce_flags(stage);
ce->ce_namelen = len;
return ret;
}
+/*
+ * Chmod an index entry with either +x or -x.
+ *
+ * Returns -1 if the chmod for the particular cache entry failed (if it's
+ * not a regular file), -2 if an invalid flip argument is passed in, 0
+ * otherwise.
+ */
+int chmod_index_entry(struct index_state *istate, struct cache_entry *ce,
+ char flip)
+{
+ if (!S_ISREG(ce->ce_mode))
+ return -1;
+ switch (flip) {
+ case '+':
+ ce->ce_mode |= 0111;
+ break;
+ case '-':
+ ce->ce_mode &= ~0111;
+ break;
+ default:
+ return -2;
+ }
+ cache_tree_invalidate_path(istate, ce->name);
+ ce->ce_flags |= CE_UPDATE_IN_BASE;
+ istate->cache_changed |= CE_ENTRY_CHANGED;
+
+ return 0;
+}
+
int ce_same_name(const struct cache_entry *a, const struct cache_entry *b)
{
int len = ce_namelen(a);
return retval;
}
+
+/*
+ * Like strcmp(), but also return the offset of the first change.
+ * If strings are equal, return the length.
+ */
+int strcmp_offset(const char *s1, const char *s2, size_t *first_change)
+{
+ size_t k;
+
+ if (!first_change)
+ return strcmp(s1, s2);
+
+ for (k = 0; s1[k] == s2[k]; k++)
+ if (s1[k] == '\0')
+ break;
+
+ *first_change = k;
+ return (unsigned char)s1[k] - (unsigned char)s2[k];
+}
+
/*
* Do we have another file with a pathname that is a proper
* subset of the name we're trying to add?
+ *
+ * That is, is there another file in the index with a path
+ * that matches a sub-directory in the given entry?
*/
static int has_dir_name(struct index_state *istate,
const struct cache_entry *ce, int pos, int ok_to_replace)
int stage = ce_stage(ce);
const char *name = ce->name;
const char *slash = name + ce_namelen(ce);
+ size_t len_eq_last;
+ int cmp_last = 0;
+
+ /*
+ * We are frequently called during an iteration on a sorted
+ * list of pathnames and while building a new index. Therefore,
+ * there is a high probability that this entry will eventually
+ * be appended to the index, rather than inserted in the middle.
+ * If we can confirm that, we can avoid binary searches on the
+ * components of the pathname.
+ *
+ * Compare the entry's full path with the last path in the index.
+ */
+ if (istate->cache_nr > 0) {
+ cmp_last = strcmp_offset(name,
+ istate->cache[istate->cache_nr - 1]->name,
+ &len_eq_last);
+ if (cmp_last > 0) {
+ if (len_eq_last == 0) {
+ /*
+ * The entry sorts AFTER the last one in the
+ * index and their paths have no common prefix,
+ * so there cannot be a F/D conflict.
+ */
+ return retval;
+ } else {
+ /*
+ * The entry sorts AFTER the last one in the
+ * index, but has a common prefix. Fall through
+ * to the loop below to disect the entry's path
+ * and see where the difference is.
+ */
+ }
+ } else if (cmp_last == 0) {
+ /*
+ * The entry exactly matches the last one in the
+ * index, but because of multiple stage and CE_REMOVE
+ * items, we fall through and let the regular search
+ * code handle it.
+ */
+ }
+ }
for (;;) {
- int len;
+ size_t len;
for (;;) {
if (*--slash == '/')
}
len = slash - name;
+ if (cmp_last > 0) {
+ /*
+ * (len + 1) is a directory boundary (including
+ * the trailing slash). And since the loop is
+ * decrementing "slash", the first iteration is
+ * the longest directory prefix; subsequent
+ * iterations consider parent directories.
+ */
+
+ if (len + 1 <= len_eq_last) {
+ /*
+ * The directory prefix (including the trailing
+ * slash) also appears as a prefix in the last
+ * entry, so the remainder cannot collide (because
+ * strcmp said the whole path was greater).
+ *
+ * EQ: last: xxx/A
+ * this: xxx/B
+ *
+ * LT: last: xxx/file_A
+ * this: xxx/file_B
+ */
+ return retval;
+ }
+
+ if (len > len_eq_last) {
+ /*
+ * This part of the directory prefix (excluding
+ * the trailing slash) is longer than the known
+ * equal portions, so this sub-directory cannot
+ * collide with a file.
+ *
+ * GT: last: xxxA
+ * this: xxxB/file
+ */
+ return retval;
+ }
+
+ if (istate->cache_nr > 0 &&
+ ce_namelen(istate->cache[istate->cache_nr - 1]) > len) {
+ /*
+ * The directory prefix lines up with part of
+ * a longer file or directory name, but sorts
+ * after it, so this sub-directory cannot
+ * collide with a file.
+ *
+ * last: xxx/yy-file (because '-' sorts before '/')
+ * this: xxx/yy/abc
+ */
+ return retval;
+ }
+
+ /*
+ * This is a possible collision. Fall through and
+ * let the regular search code handle it.
+ *
+ * last: xxx
+ * this: xxx/file
+ */
+ }
+
pos = index_name_stage_pos(istate, name, len, stage);
if (pos >= 0) {
/*
if (!(option & ADD_CACHE_KEEP_CACHE_TREE))
cache_tree_invalidate_path(istate, ce->name);
- pos = index_name_stage_pos(istate, ce->name, ce_namelen(ce), ce_stage(ce));
+
+ /*
+ * If this entry's path sorts after the last entry in the index,
+ * we can avoid searching for it.
+ */
+ if (istate->cache_nr > 0 &&
+ strcmp(ce->name, istate->cache[istate->cache_nr - 1]->name) > 0)
+ pos = -istate->cache_nr - 1;
+ else
+ pos = index_name_stage_pos(istate, ce->name, ce_namelen(ce), ce_stage(ce));
/* existing match? Just replace it. */
if (pos >= 0) {
}
pos = -pos-1;
+ if (!(option & ADD_CACHE_KEEP_CACHE_TREE))
+ untracked_cache_add_to_index(istate, ce->name);
+
/*
* Inserting a merged entry ("stage 0") into the index
* will always replace all non-merged entries..
if (cache_errno == ENOENT)
fmt = deleted_fmt;
- else if (ce->ce_flags & CE_INTENT_TO_ADD)
+ else if (ce_intent_to_add(ce))
fmt = added_fmt; /* must be before other checks */
else if (changed & TYPE_CHANGED)
fmt = typechange_fmt;
return has_errors;
}
-static struct cache_entry *refresh_cache_entry(struct cache_entry *ce,
+struct cache_entry *refresh_cache_entry(struct cache_entry *ce,
unsigned int options)
{
return refresh_cache_ent(&the_index, ce, options, NULL, NULL);
};
/* These are only used for v3 or lower */
+#define align_padding_size(size, len) ((size + (len) + 8) & ~7) - (size + len)
#define align_flex_name(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
#define ondisk_cache_entry_size(len) align_flex_name(ondisk_cache_entry,len)
#define ondisk_cache_entry_extended_size(len) align_flex_name(ondisk_cache_entry_extended,len)
ondisk_cache_entry_extended_size(ce_namelen(ce)) : \
ondisk_cache_entry_size(ce_namelen(ce)))
+/* Allow fsck to force verification of the index checksum. */
+int verify_index_checksum;
+
static int verify_hdr(struct cache_header *hdr, unsigned long size)
{
git_SHA_CTX c;
hdr_version = ntohl(hdr->hdr_version);
if (hdr_version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < hdr_version)
return error("bad index version %d", hdr_version);
+
+ if (!verify_index_checksum)
+ return 0;
+
git_SHA1_Init(&c);
git_SHA1_Update(&c, hdr, size - 20);
git_SHA1_Final(sha1, &c);
if (read_link_extension(istate, data, sz))
return -1;
break;
+ case CACHE_EXT_UNTRACKED:
+ istate->untracked = read_untracked_extension(data, sz);
+ break;
default:
if (*ext < 'A' || 'Z' < *ext)
return error("index uses %.4s extension, which we do not understand",
return 0;
}
-int hold_locked_index(struct lock_file *lk, int die_on_error)
+int hold_locked_index(struct lock_file *lk, int lock_flags)
{
- return hold_lock_file_for_update(lk, get_index_file(),
- die_on_error
- ? LOCK_DIE_ON_ERROR
- : 0);
+ return hold_lock_file_for_update(lk, get_index_file(), lock_flags);
}
int read_index(struct index_state *istate)
ce->ce_flags = flags & ~CE_NAMEMASK;
ce->ce_namelen = len;
ce->index = 0;
- hashcpy(ce->sha1, ondisk->sha1);
+ hashcpy(ce->oid.hash, ondisk->sha1);
memcpy(ce->name, name, len);
ce->name[len] = '\0';
return ce;
}
}
+static void tweak_untracked_cache(struct index_state *istate)
+{
+ switch (git_config_get_untracked_cache()) {
+ case -1: /* keep: do nothing */
+ break;
+ case 0: /* false */
+ remove_untracked_cache(istate);
+ break;
+ case 1: /* true */
+ add_untracked_cache(istate);
+ break;
+ default: /* unknown value: do nothing */
+ break;
+ }
+}
+
+static void tweak_split_index(struct index_state *istate)
+{
+ switch (git_config_get_split_index()) {
+ case -1: /* unset: do nothing */
+ break;
+ case 0: /* false */
+ remove_split_index(istate);
+ break;
+ case 1: /* true */
+ add_split_index(istate);
+ break;
+ default: /* unknown value: do nothing */
+ break;
+ }
+}
+
+static void post_read_index_from(struct index_state *istate)
+{
+ check_ce_order(istate);
+ tweak_untracked_cache(istate);
+ tweak_split_index(istate);
+}
+
/* remember to discard_cache() before reading a different cache! */
int do_read_index(struct index_state *istate, const char *path, int must_exist)
{
die("index file corrupt");
}
+/*
+ * Signal that the shared index is used by updating its mtime.
+ *
+ * This way, shared index can be removed if they have not been used
+ * for some time.
+ */
+static void freshen_shared_index(char *base_sha1_hex, int warn)
+{
+ char *shared_index = git_pathdup("sharedindex.%s", base_sha1_hex);
+ if (!check_and_freshen_file(shared_index, 1) && warn)
+ warning("could not freshen shared index '%s'", shared_index);
+ free(shared_index);
+}
+
int read_index_from(struct index_state *istate, const char *path)
{
struct split_index *split_index;
int ret;
+ char *base_sha1_hex;
+ const char *base_path;
/* istate->initialized covers both .git/index and .git/sharedindex.xxx */
if (istate->initialized)
return istate->cache_nr;
ret = do_read_index(istate, path, 0);
+
split_index = istate->split_index;
if (!split_index || is_null_sha1(split_index->base_sha1)) {
- check_ce_order(istate);
+ post_read_index_from(istate);
return ret;
}
discard_index(split_index->base);
else
split_index->base = xcalloc(1, sizeof(*split_index->base));
- ret = do_read_index(split_index->base,
- git_path("sharedindex.%s",
- sha1_to_hex(split_index->base_sha1)), 1);
+
+ base_sha1_hex = sha1_to_hex(split_index->base_sha1);
+ base_path = git_path("sharedindex.%s", base_sha1_hex);
+ ret = do_read_index(split_index->base, base_path, 1);
if (hashcmp(split_index->base_sha1, split_index->base->sha1))
die("broken index, expect %s in %s, got %s",
- sha1_to_hex(split_index->base_sha1),
- git_path("sharedindex.%s",
- sha1_to_hex(split_index->base_sha1)),
+ base_sha1_hex, base_path,
sha1_to_hex(split_index->base->sha1));
+
+ freshen_shared_index(base_sha1_hex, 0);
merge_base_index(istate);
- check_ce_order(istate);
+ post_read_index_from(istate);
return ret;
}
free_name_hash(istate);
cache_tree_free(&(istate->cache_tree));
istate->initialized = 0;
- free(istate->cache);
- istate->cache = NULL;
+ FREE_AND_NULL(istate->cache);
istate->cache_alloc = 0;
discard_split_index(istate);
+ free_untracked_cache(istate->untracked);
+ istate->untracked = NULL;
return 0;
}
unsigned int buffered = write_buffer_len;
if (buffered) {
git_SHA1_Update(context, write_buffer, buffered);
- if (write_in_full(fd, write_buffer, buffered) != buffered)
+ if (write_in_full(fd, write_buffer, buffered) < 0)
return -1;
write_buffer_len = 0;
}
/* Flush first if not enough space for SHA1 signature */
if (left + 20 > WRITE_BUFFER_SIZE) {
- if (write_in_full(fd, write_buffer, left) != left)
+ if (write_in_full(fd, write_buffer, left) < 0)
return -1;
left = 0;
}
git_SHA1_Final(write_buffer + left, context);
hashcpy(sha1, write_buffer + left);
left += 20;
- return (write_in_full(fd, write_buffer, left) != left) ? -1 : 0;
+ return (write_in_full(fd, write_buffer, left) < 0) ? -1 : 0;
}
static void ce_smudge_racily_clean_entry(struct cache_entry *ce)
}
/* Copy miscellaneous fields but not the name */
-static char *copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk,
+static void copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk,
struct cache_entry *ce)
{
short flags;
ondisk->uid = htonl(ce->ce_stat_data.sd_uid);
ondisk->gid = htonl(ce->ce_stat_data.sd_gid);
ondisk->size = htonl(ce->ce_stat_data.sd_size);
- hashcpy(ondisk->sha1, ce->sha1);
+ hashcpy(ondisk->sha1, ce->oid.hash);
flags = ce->ce_flags & ~CE_NAMEMASK;
flags |= (ce_namelen(ce) >= CE_NAMEMASK ? CE_NAMEMASK : ce_namelen(ce));
struct ondisk_cache_entry_extended *ondisk2;
ondisk2 = (struct ondisk_cache_entry_extended *)ondisk;
ondisk2->flags2 = htons((ce->ce_flags & CE_EXTENDED_FLAGS) >> 16);
- return ondisk2->name;
- }
- else {
- return ondisk->name;
}
}
static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce,
- struct strbuf *previous_name)
+ struct strbuf *previous_name, struct ondisk_cache_entry *ondisk)
{
int size;
- struct ondisk_cache_entry *ondisk;
int saved_namelen = saved_namelen; /* compiler workaround */
- char *name;
int result;
+ static unsigned char padding[8] = { 0x00 };
if (ce->ce_flags & CE_STRIP_NAME) {
saved_namelen = ce_namelen(ce);
ce->ce_namelen = 0;
}
+ if (ce->ce_flags & CE_EXTENDED)
+ size = offsetof(struct ondisk_cache_entry_extended, name);
+ else
+ size = offsetof(struct ondisk_cache_entry, name);
+
if (!previous_name) {
- size = ondisk_ce_size(ce);
- ondisk = xcalloc(1, size);
- name = copy_cache_entry_to_ondisk(ondisk, ce);
- memcpy(name, ce->name, ce_namelen(ce));
+ int len = ce_namelen(ce);
+ copy_cache_entry_to_ondisk(ondisk, ce);
+ result = ce_write(c, fd, ondisk, size);
+ if (!result)
+ result = ce_write(c, fd, ce->name, len);
+ if (!result)
+ result = ce_write(c, fd, padding, align_padding_size(size, len));
} else {
int common, to_remove, prefix_size;
unsigned char to_remove_vi[16];
to_remove = previous_name->len - common;
prefix_size = encode_varint(to_remove, to_remove_vi);
- if (ce->ce_flags & CE_EXTENDED)
- size = offsetof(struct ondisk_cache_entry_extended, name);
- else
- size = offsetof(struct ondisk_cache_entry, name);
- size += prefix_size + (ce_namelen(ce) - common + 1);
-
- ondisk = xcalloc(1, size);
- name = copy_cache_entry_to_ondisk(ondisk, ce);
- memcpy(name, to_remove_vi, prefix_size);
- memcpy(name + prefix_size, ce->name + common, ce_namelen(ce) - common);
+ copy_cache_entry_to_ondisk(ondisk, ce);
+ result = ce_write(c, fd, ondisk, size);
+ if (!result)
+ result = ce_write(c, fd, to_remove_vi, prefix_size);
+ if (!result)
+ result = ce_write(c, fd, ce->name + common, ce_namelen(ce) - common);
+ if (!result)
+ result = ce_write(c, fd, padding, 1);
strbuf_splice(previous_name, common, to_remove,
ce->name + common, ce_namelen(ce) - common);
ce->ce_flags &= ~CE_STRIP_NAME;
}
- result = ce_write(c, fd, ondisk, size);
- free(ondisk);
return result;
}
rollback_lock_file(lockfile);
}
-static int do_write_index(struct index_state *istate, int newfd,
+static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
int strip_extensions)
{
+ int newfd = tempfile->fd;
git_SHA_CTX c;
struct cache_header hdr;
- int i, err, removed, extended, hdr_version;
+ int i, err = 0, removed, extended, hdr_version;
struct cache_entry **cache = istate->cache;
int entries = istate->cache_nr;
struct stat st;
+ struct ondisk_cache_entry_extended ondisk;
struct strbuf previous_name_buf = STRBUF_INIT, *previous_name;
+ int drop_cache_tree = 0;
for (i = removed = extended = 0; i < entries; i++) {
if (cache[i]->ce_flags & CE_REMOVE)
return -1;
previous_name = (hdr_version == 4) ? &previous_name_buf : NULL;
+
for (i = 0; i < entries; i++) {
struct cache_entry *ce = cache[i];
if (ce->ce_flags & CE_REMOVE)
continue;
if (!ce_uptodate(ce) && is_racy_timestamp(istate, ce))
ce_smudge_racily_clean_entry(ce);
- if (is_null_sha1(ce->sha1)) {
+ if (is_null_oid(&ce->oid)) {
static const char msg[] = "cache entry has null sha1: %s";
static int allow = -1;
if (allow)
warning(msg, ce->name);
else
- return error(msg, ce->name);
+ err = error(msg, ce->name);
+
+ drop_cache_tree = 1;
}
- if (ce_write_entry(&c, newfd, ce, previous_name) < 0)
- return -1;
+ if (ce_write_entry(&c, newfd, ce, previous_name, (struct ondisk_cache_entry *)&ondisk) < 0)
+ err = -1;
+
+ if (err)
+ break;
}
strbuf_release(&previous_name_buf);
+ if (err)
+ return err;
+
/* Write extension data here */
if (!strip_extensions && istate->split_index) {
struct strbuf sb = STRBUF_INIT;
if (err)
return -1;
}
- if (!strip_extensions && istate->cache_tree) {
+ if (!strip_extensions && !drop_cache_tree && istate->cache_tree) {
struct strbuf sb = STRBUF_INIT;
cache_tree_write(&sb, istate->cache_tree);
if (err)
return -1;
}
+ if (!strip_extensions && istate->untracked) {
+ struct strbuf sb = STRBUF_INIT;
+
+ write_untracked_extension(&sb, istate->untracked);
+ err = write_index_ext_header(&c, newfd, CACHE_EXT_UNTRACKED,
+ sb.len) < 0 ||
+ ce_write(&c, newfd, sb.buf, sb.len) < 0;
+ strbuf_release(&sb);
+ if (err)
+ return -1;
+ }
- if (ce_flush(&c, newfd, istate->sha1) || fstat(newfd, &st))
+ if (ce_flush(&c, newfd, istate->sha1))
+ return -1;
+ if (close_tempfile_gently(tempfile)) {
+ error(_("could not close '%s'"), tempfile->filename.buf);
+ delete_tempfile(&tempfile);
+ return -1;
+ }
+ if (stat(tempfile->filename.buf, &st))
return -1;
istate->timestamp.sec = (unsigned int)st.st_mtime;
istate->timestamp.nsec = ST_MTIME_NSEC(st);
static int do_write_locked_index(struct index_state *istate, struct lock_file *lock,
unsigned flags)
{
- int ret = do_write_index(istate, lock->fd, 0);
+ int ret = do_write_index(istate, lock->tempfile, 0);
if (ret)
return ret;
assert((flags & (COMMIT_LOCK | CLOSE_LOCK)) !=
if (flags & COMMIT_LOCK)
return commit_locked_index(lock);
else if (flags & CLOSE_LOCK)
- return close_lock_file(lock);
+ return close_lock_file_gently(lock);
else
return ret;
}
return ret;
}
-static char *temporary_sharedindex;
+static const char *shared_index_expire = "2.weeks.ago";
-static void remove_temporary_sharedindex(void)
+static unsigned long get_shared_index_expire_date(void)
{
- if (temporary_sharedindex) {
- unlink_or_warn(temporary_sharedindex);
- free(temporary_sharedindex);
- temporary_sharedindex = NULL;
+ static unsigned long shared_index_expire_date;
+ static int shared_index_expire_date_prepared;
+
+ if (!shared_index_expire_date_prepared) {
+ git_config_get_expiry("splitindex.sharedindexexpire",
+ &shared_index_expire);
+ shared_index_expire_date = approxidate(shared_index_expire);
+ shared_index_expire_date_prepared = 1;
}
+
+ return shared_index_expire_date;
+}
+
+static int should_delete_shared_index(const char *shared_index_path)
+{
+ struct stat st;
+ unsigned long expiration;
+
+ /* Check timestamp */
+ expiration = get_shared_index_expire_date();
+ if (!expiration)
+ return 0;
+ if (stat(shared_index_path, &st))
+ return error_errno(_("could not stat '%s'"), shared_index_path);
+ if (st.st_mtime > expiration)
+ return 0;
+
+ return 1;
}
-static void remove_temporary_sharedindex_on_signal(int signo)
+static int clean_shared_index_files(const char *current_hex)
{
- remove_temporary_sharedindex();
- sigchain_pop(signo);
- raise(signo);
+ struct dirent *de;
+ DIR *dir = opendir(get_git_dir());
+
+ if (!dir)
+ return error_errno(_("unable to open git dir: %s"), get_git_dir());
+
+ while ((de = readdir(dir)) != NULL) {
+ const char *sha1_hex;
+ const char *shared_index_path;
+ if (!skip_prefix(de->d_name, "sharedindex.", &sha1_hex))
+ continue;
+ if (!strcmp(sha1_hex, current_hex))
+ continue;
+ shared_index_path = git_path("%s", de->d_name);
+ if (should_delete_shared_index(shared_index_path) > 0 &&
+ unlink(shared_index_path))
+ warning_errno(_("unable to unlink: %s"), shared_index_path);
+ }
+ closedir(dir);
+
+ return 0;
}
static int write_shared_index(struct index_state *istate,
struct lock_file *lock, unsigned flags)
{
+ struct tempfile *temp;
struct split_index *si = istate->split_index;
- static int installed_handler;
- int fd, ret;
+ int ret;
- temporary_sharedindex = git_pathdup("sharedindex_XXXXXX");
- fd = mkstemp(temporary_sharedindex);
- if (fd < 0) {
- free(temporary_sharedindex);
- temporary_sharedindex = NULL;
+ temp = mks_tempfile(git_path("sharedindex_XXXXXX"));
+ if (!temp) {
hashclr(si->base_sha1);
return do_write_locked_index(istate, lock, flags);
}
- if (!installed_handler) {
- atexit(remove_temporary_sharedindex);
- sigchain_push_common(remove_temporary_sharedindex_on_signal);
- }
move_cache_to_base_index(istate);
- ret = do_write_index(si->base, fd, 1);
- close(fd);
+ ret = do_write_index(si->base, temp, 1);
+ if (ret) {
+ delete_tempfile(&temp);
+ return ret;
+ }
+ ret = adjust_shared_perm(get_tempfile_path(temp));
if (ret) {
- remove_temporary_sharedindex();
+ int save_errno = errno;
+ error("cannot fix permission bits on %s", get_tempfile_path(temp));
+ delete_tempfile(&temp);
+ errno = save_errno;
return ret;
}
- ret = rename(temporary_sharedindex,
- git_path("sharedindex.%s", sha1_to_hex(si->base->sha1)));
- free(temporary_sharedindex);
- temporary_sharedindex = NULL;
- if (!ret)
+ ret = rename_tempfile(&temp,
+ git_path("sharedindex.%s", sha1_to_hex(si->base->sha1)));
+ if (!ret) {
hashcpy(si->base_sha1, si->base->sha1);
+ clean_shared_index_files(sha1_to_hex(si->base->sha1));
+ }
+
return ret;
}
+static const int default_max_percent_split_change = 20;
+
+static int too_many_not_shared_entries(struct index_state *istate)
+{
+ int i, not_shared = 0;
+ int max_split = git_config_get_max_percent_split_change();
+
+ switch (max_split) {
+ case -1:
+ /* not or badly configured: use the default value */
+ max_split = default_max_percent_split_change;
+ break;
+ case 0:
+ return 1; /* 0% means always write a new shared index */
+ case 100:
+ return 0; /* 100% means never write a new shared index */
+ default:
+ break; /* just use the configured value */
+ }
+
+ /* Count not shared entries */
+ for (i = 0; i < istate->cache_nr; i++) {
+ struct cache_entry *ce = istate->cache[i];
+ if (!ce->index)
+ not_shared++;
+ }
+
+ return (int64_t)istate->cache_nr * max_split < (int64_t)not_shared * 100;
+}
+
int write_locked_index(struct index_state *istate, struct lock_file *lock,
unsigned flags)
{
+ int new_shared_index, ret;
struct split_index *si = istate->split_index;
if (!si || alternate_index_output ||
if ((v & 15) < 6)
istate->cache_changed |= SPLIT_INDEX_ORDERED;
}
- if (istate->cache_changed & SPLIT_INDEX_ORDERED) {
- int ret = write_shared_index(istate, lock, flags);
+ if (too_many_not_shared_entries(istate))
+ istate->cache_changed |= SPLIT_INDEX_ORDERED;
+
+ new_shared_index = istate->cache_changed & SPLIT_INDEX_ORDERED;
+
+ if (new_shared_index) {
+ ret = write_shared_index(istate, lock, flags);
if (ret)
return ret;
}
- return write_split_index(istate, lock, flags);
+ ret = write_split_index(istate, lock, flags);
+
+ /* Freshen the shared index only if the split-index was written */
+ if (!ret && !new_shared_index)
+ freshen_shared_index(sha1_to_hex(si->base_sha1), 1);
+
+ return ret;
}
/*
return 1;
}
-void *read_blob_data_from_index(struct index_state *istate, const char *path, unsigned long *size)
+void *read_blob_data_from_index(const struct index_state *istate,
+ const char *path, unsigned long *size)
{
int pos, len;
unsigned long sz;
}
if (pos < 0)
return NULL;
- data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz);
+ data = read_sha1_file(istate->cache[pos]->oid.hash, &type, &sz);
if (!data || type != OBJ_BLOB) {
free(data);
return NULL;
void stat_validity_clear(struct stat_validity *sv)
{
- free(sv->sd);
- sv->sd = NULL;
+ FREE_AND_NULL(sv->sd);
}
int stat_validity_check(struct stat_validity *sv, const char *path)
fill_stat_data(sv->sd, &st);
}
}
+
+void move_index_extensions(struct index_state *dst, struct index_state *src)
+{
+ dst->untracked = src->untracked;
+ src->untracked = NULL;
+}
projects / platform / upstream / git.git / blobdiff