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-rw-r--r--read-cache.c127
1 files changed, 95 insertions, 32 deletions
diff --git a/read-cache.c b/read-cache.c
index c14b562313..3f587110cb 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -67,8 +67,10 @@ void rename_index_entry_at(struct index_state *istate, int nr, const char *new_n
*/
void fill_stat_cache_info(struct cache_entry *ce, struct stat *st)
{
- ce->ce_ctime = st->st_ctime;
- ce->ce_mtime = st->st_mtime;
+ ce->ce_ctime.sec = (unsigned int)st->st_ctime;
+ ce->ce_mtime.sec = (unsigned int)st->st_mtime;
+ ce->ce_ctime.nsec = ST_CTIME_NSEC(*st);
+ ce->ce_mtime.nsec = ST_MTIME_NSEC(*st);
ce->ce_dev = st->st_dev;
ce->ce_ino = st->st_ino;
ce->ce_uid = st->st_uid;
@@ -99,27 +101,21 @@ static int ce_compare_data(struct cache_entry *ce, struct stat *st)
static int ce_compare_link(struct cache_entry *ce, size_t expected_size)
{
int match = -1;
- char *target;
void *buffer;
unsigned long size;
enum object_type type;
- int len;
+ struct strbuf sb = STRBUF_INIT;
- target = xmalloc(expected_size);
- len = readlink(ce->name, target, expected_size);
- if (len != expected_size) {
- free(target);
+ if (strbuf_readlink(&sb, ce->name, expected_size))
return -1;
- }
+
buffer = read_sha1_file(ce->sha1, &type, &size);
- if (!buffer) {
- free(target);
- return -1;
+ if (buffer) {
+ if (size == sb.len)
+ match = memcmp(buffer, sb.buf, size);
+ free(buffer);
}
- if (size == expected_size)
- match = memcmp(buffer, target, size);
- free(buffer);
- free(target);
+ strbuf_release(&sb);
return match;
}
@@ -202,10 +198,17 @@ static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
default:
die("internal error: ce_mode is %o", ce->ce_mode);
}
- if (ce->ce_mtime != (unsigned int) st->st_mtime)
+ if (ce->ce_mtime.sec != (unsigned int)st->st_mtime)
+ changed |= MTIME_CHANGED;
+ if (trust_ctime && ce->ce_ctime.sec != (unsigned int)st->st_ctime)
+ changed |= CTIME_CHANGED;
+
+#ifdef USE_NSEC
+ if (ce->ce_mtime.nsec != ST_MTIME_NSEC(*st))
changed |= MTIME_CHANGED;
- if (trust_ctime && ce->ce_ctime != (unsigned int) st->st_ctime)
+ if (trust_ctime && ce->ce_ctime.nsec != ST_CTIME_NSEC(*st))
changed |= CTIME_CHANGED;
+#endif
if (ce->ce_uid != (unsigned int) st->st_uid ||
ce->ce_gid != (unsigned int) st->st_gid)
@@ -238,8 +241,16 @@ static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
static int is_racy_timestamp(const struct index_state *istate, struct cache_entry *ce)
{
return (!S_ISGITLINK(ce->ce_mode) &&
- istate->timestamp &&
- ((unsigned int)istate->timestamp) <= ce->ce_mtime);
+ istate->timestamp.sec &&
+#ifdef USE_NSEC
+ /* nanosecond timestamped files can also be racy! */
+ (istate->timestamp.sec < ce->ce_mtime.sec ||
+ (istate->timestamp.sec == ce->ce_mtime.sec &&
+ istate->timestamp.nsec <= ce->ce_mtime.nsec))
+#else
+ istate->timestamp.sec <= ce->ce_mtime.sec
+#endif
+ );
}
int ie_match_stat(const struct index_state *istate,
@@ -449,6 +460,26 @@ int remove_index_entry_at(struct index_state *istate, int pos)
return 1;
}
+/*
+ * Remove all cache ententries marked for removal, that is where
+ * CE_REMOVE is set in ce_flags. This is much more effective than
+ * calling remove_index_entry_at() for each entry to be removed.
+ */
+void remove_marked_cache_entries(struct index_state *istate)
+{
+ struct cache_entry **ce_array = istate->cache;
+ unsigned int i, j;
+
+ for (i = j = 0; i < istate->cache_nr; i++) {
+ if (ce_array[i]->ce_flags & CE_REMOVE)
+ remove_name_hash(ce_array[i]);
+ else
+ ce_array[j++] = ce_array[i];
+ }
+ istate->cache_changed = 1;
+ istate->cache_nr = j;
+}
+
int remove_file_from_index(struct index_state *istate, const char *path)
{
int pos = index_name_pos(istate, path, strlen(path));
@@ -1145,8 +1176,10 @@ static void convert_from_disk(struct ondisk_cache_entry *ondisk, struct cache_en
size_t len;
const char *name;
- ce->ce_ctime = ntohl(ondisk->ctime.sec);
- ce->ce_mtime = ntohl(ondisk->mtime.sec);
+ ce->ce_ctime.sec = ntohl(ondisk->ctime.sec);
+ ce->ce_mtime.sec = ntohl(ondisk->mtime.sec);
+ ce->ce_ctime.nsec = ntohl(ondisk->ctime.nsec);
+ ce->ce_mtime.nsec = ntohl(ondisk->mtime.nsec);
ce->ce_dev = ntohl(ondisk->dev);
ce->ce_ino = ntohl(ondisk->ino);
ce->ce_mode = ntohl(ondisk->mode);
@@ -1212,7 +1245,8 @@ int read_index_from(struct index_state *istate, const char *path)
return istate->cache_nr;
errno = ENOENT;
- istate->timestamp = 0;
+ istate->timestamp.sec = 0;
+ istate->timestamp.nsec = 0;
fd = open(path, O_RDONLY);
if (fd < 0) {
if (errno == ENOENT)
@@ -1264,7 +1298,9 @@ int read_index_from(struct index_state *istate, const char *path)
src_offset += ondisk_ce_size(ce);
dst_offset += ce_size(ce);
}
- istate->timestamp = st.st_mtime;
+ istate->timestamp.sec = st.st_mtime;
+ istate->timestamp.nsec = ST_MTIME_NSEC(st);
+
while (src_offset <= mmap_size - 20 - 8) {
/* After an array of active_nr index entries,
* there can be arbitrary number of extended
@@ -1294,14 +1330,15 @@ unmap:
int is_index_unborn(struct index_state *istate)
{
- return (!istate->cache_nr && !istate->alloc && !istate->timestamp);
+ return (!istate->cache_nr && !istate->alloc && !istate->timestamp.sec);
}
int discard_index(struct index_state *istate)
{
istate->cache_nr = 0;
istate->cache_changed = 0;
- istate->timestamp = 0;
+ istate->timestamp.sec = 0;
+ istate->timestamp.nsec = 0;
istate->name_hash_initialized = 0;
free_hash(&istate->name_hash);
cache_tree_free(&(istate->cache_tree));
@@ -1447,10 +1484,10 @@ static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce)
struct ondisk_cache_entry *ondisk = xcalloc(1, size);
char *name;
- ondisk->ctime.sec = htonl(ce->ce_ctime);
- ondisk->ctime.nsec = 0;
- ondisk->mtime.sec = htonl(ce->ce_mtime);
- ondisk->mtime.nsec = 0;
+ ondisk->ctime.sec = htonl(ce->ce_ctime.sec);
+ ondisk->mtime.sec = htonl(ce->ce_mtime.sec);
+ ondisk->ctime.nsec = htonl(ce->ce_ctime.nsec);
+ ondisk->mtime.nsec = htonl(ce->ce_mtime.nsec);
ondisk->dev = htonl(ce->ce_dev);
ondisk->ino = htonl(ce->ce_ino);
ondisk->mode = htonl(ce->ce_mode);
@@ -1472,13 +1509,14 @@ static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce)
return ce_write(c, fd, ondisk, size);
}
-int write_index(const struct index_state *istate, int newfd)
+int write_index(struct index_state *istate, int newfd)
{
git_SHA_CTX c;
struct cache_header hdr;
int i, err, removed, extended;
struct cache_entry **cache = istate->cache;
int entries = istate->cache_nr;
+ struct stat st;
for (i = removed = extended = 0; i < entries; i++) {
if (cache[i]->ce_flags & CE_REMOVE)
@@ -1522,7 +1560,12 @@ int write_index(const struct index_state *istate, int newfd)
if (err)
return -1;
}
- return ce_flush(&c, newfd);
+
+ if (ce_flush(&c, newfd) || fstat(newfd, &st))
+ return -1;
+ istate->timestamp.sec = (unsigned int)st.st_mtime;
+ istate->timestamp.nsec = ST_MTIME_NSEC(st);
+ return 0;
}
/*
@@ -1580,6 +1623,26 @@ static void update_callback(struct diff_queue_struct *q,
default:
die("unexpected diff status %c", p->status);
case DIFF_STATUS_UNMERGED:
+ /*
+ * ADD_CACHE_IGNORE_REMOVAL is unset if "git
+ * add -u" is calling us, In such a case, a
+ * missing work tree file needs to be removed
+ * if there is an unmerged entry at stage #2,
+ * but such a diff record is followed by
+ * another with DIFF_STATUS_DELETED (and if
+ * there is no stage #2, we won't see DELETED
+ * nor MODIFIED). We can simply continue
+ * either way.
+ */
+ if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL))
+ continue;
+ /*
+ * Otherwise, it is "git add path" is asking
+ * to explicitly add it; we fall through. A
+ * missing work tree file is an error and is
+ * caught by add_file_to_index() in such a
+ * case.
+ */
case DIFF_STATUS_MODIFIED:
case DIFF_STATUS_TYPE_CHANGED:
if (add_file_to_index(&the_index, path, data->flags)) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 13:18:10 +0000