-#include "refs.h"
#include "cache.h"
+#include "refs.h"
+#include "object.h"
+#include "tag.h"
-#include <errno.h>
+/* ISSYMREF=01 and ISPACKED=02 are public interfaces */
+#define REF_KNOWS_PEELED 04
struct ref_list {
struct ref_list *next;
+ unsigned char flag; /* ISSYMREF? ISPACKED? */
unsigned char sha1[20];
+ unsigned char peeled[20];
char name[FLEX_ARRAY];
};
if (line[len] != '\n')
return NULL;
line[len] = 0;
+
return line;
}
-static struct ref_list *add_ref(const char *name, const unsigned char *sha1, struct ref_list *list)
+static struct ref_list *add_ref(const char *name, const unsigned char *sha1,
+ int flag, struct ref_list *list,
+ struct ref_list **new_entry)
{
int len;
struct ref_list **p = &list, *entry;
break;
/* Same as existing entry? */
- if (!cmp)
+ if (!cmp) {
+ if (new_entry)
+ *new_entry = entry;
return list;
+ }
p = &entry->next;
}
len = strlen(name) + 1;
entry = xmalloc(sizeof(struct ref_list) + len);
hashcpy(entry->sha1, sha1);
+ hashclr(entry->peeled);
memcpy(entry->name, name, len);
+ entry->flag = flag;
entry->next = *p;
*p = entry;
+ if (new_entry)
+ *new_entry = entry;
return list;
}
-static struct ref_list *get_packed_refs(void)
+/*
+ * Future: need to be in "struct repository"
+ * when doing a full libification.
+ */
+struct cached_refs {
+ char did_loose;
+ char did_packed;
+ struct ref_list *loose;
+ struct ref_list *packed;
+} cached_refs;
+
+static void free_ref_list(struct ref_list *list)
+{
+ struct ref_list *next;
+ for ( ; list; list = next) {
+ next = list->next;
+ free(list);
+ }
+}
+
+static void invalidate_cached_refs(void)
+{
+ struct cached_refs *ca = &cached_refs;
+
+ if (ca->did_loose && ca->loose)
+ free_ref_list(ca->loose);
+ if (ca->did_packed && ca->packed)
+ free_ref_list(ca->packed);
+ ca->loose = ca->packed = NULL;
+ ca->did_loose = ca->did_packed = 0;
+}
+
+static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
{
- static int did_refs = 0;
- static struct ref_list *refs = NULL;
+ struct ref_list *list = NULL;
+ struct ref_list *last = NULL;
+ char refline[PATH_MAX];
+ int flag = REF_ISPACKED;
+
+ while (fgets(refline, sizeof(refline), f)) {
+ unsigned char sha1[20];
+ const char *name;
+ static const char header[] = "# pack-refs with:";
+
+ 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;
+ }
+
+ name = parse_ref_line(refline, sha1);
+ if (name) {
+ list = add_ref(name, sha1, flag, list, &last);
+ continue;
+ }
+ if (last &&
+ refline[0] == '^' &&
+ strlen(refline) == 42 &&
+ refline[41] == '\n' &&
+ !get_sha1_hex(refline + 1, sha1))
+ hashcpy(last->peeled, sha1);
+ }
+ cached_refs->packed = list;
+}
- if (!did_refs) {
+static struct ref_list *get_packed_refs(void)
+{
+ if (!cached_refs.did_packed) {
FILE *f = fopen(git_path("packed-refs"), "r");
+ cached_refs.packed = NULL;
if (f) {
- struct ref_list *list = NULL;
- char refline[PATH_MAX];
- while (fgets(refline, sizeof(refline), f)) {
- unsigned char sha1[20];
- const char *name = parse_ref_line(refline, sha1);
- if (!name)
- continue;
- list = add_ref(name, sha1, list);
- }
+ read_packed_refs(f, &cached_refs);
fclose(f);
- refs = list;
}
- did_refs = 1;
+ cached_refs.did_packed = 1;
}
- return refs;
+ return cached_refs.packed;
}
static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
while ((de = readdir(dir)) != NULL) {
unsigned char sha1[20];
struct stat st;
+ int flag;
int namelen;
if (de->d_name[0] == '.')
list = get_ref_dir(ref, list);
continue;
}
- if (read_ref(ref, sha1) < 0) {
+ if (!resolve_ref(ref, sha1, 1, &flag)) {
error("%s points nowhere!", ref);
continue;
}
- list = add_ref(ref, sha1, list);
+ list = add_ref(ref, sha1, flag, list, NULL);
}
free(ref);
closedir(dir);
static struct ref_list *get_loose_refs(void)
{
- static int did_refs = 0;
- static struct ref_list *refs = NULL;
-
- if (!did_refs) {
- refs = get_ref_dir("refs", NULL);
- did_refs = 1;
+ if (!cached_refs.did_loose) {
+ cached_refs.loose = get_ref_dir("refs", NULL);
+ cached_refs.did_loose = 1;
}
- return refs;
+ return cached_refs.loose;
}
/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
-const char *resolve_ref(const char *ref, unsigned char *sha1, int reading)
+const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
{
int depth = MAXDEPTH, len;
char buffer[256];
static char ref_buffer[256];
+ if (flag)
+ *flag = 0;
+
for (;;) {
const char *path = git_path("%s", ref);
struct stat st;
while (list) {
if (!strcmp(ref, list->name)) {
hashcpy(sha1, list->sha1);
+ if (flag)
+ *flag |= REF_ISPACKED;
return ref;
}
list = list->next;
buffer[len] = 0;
strcpy(ref_buffer, buffer);
ref = ref_buffer;
+ if (flag)
+ *flag |= REF_ISSYMREF;
continue;
}
}
+ /* Is it a directory? */
+ if (S_ISDIR(st.st_mode)) {
+ errno = EISDIR;
+ return NULL;
+ }
+
/*
* 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(fd, buffer, sizeof(buffer)-1);
+ len = read_in_full(fd, buffer, sizeof(buffer)-1);
close(fd);
/*
buf[len] = 0;
memcpy(ref_buffer, buf, len + 1);
ref = ref_buffer;
+ if (flag)
+ *flag |= REF_ISSYMREF;
}
if (len < 40 || get_sha1_hex(buffer, sha1))
return NULL;
}
lockpath = mkpath("%s.lock", git_HEAD);
fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);
- written = write(fd, ref, len);
+ written = write_in_full(fd, ref, len);
close(fd);
if (written != len) {
unlink(lockpath);
int read_ref(const char *ref, unsigned char *sha1)
{
- if (resolve_ref(ref, sha1, 1))
+ if (resolve_ref(ref, sha1, 1, NULL))
+ return 0;
+ return -1;
+}
+
+static int do_one_ref(const char *base, each_ref_fn fn, int trim,
+ void *cb_data, struct ref_list *entry)
+{
+ if (strncmp(base, entry->name, trim))
return 0;
+ if (is_null_sha1(entry->sha1))
+ return 0;
+ if (!has_sha1_file(entry->sha1)) {
+ error("%s does not point to a valid object!", entry->name);
+ return 0;
+ }
+ return fn(entry->name + trim, entry->sha1, entry->flag, cb_data);
+}
+
+int peel_ref(const char *ref, unsigned char *sha1)
+{
+ int flag;
+ unsigned char base[20];
+ struct object *o;
+
+ if (!resolve_ref(ref, base, 1, &flag))
+ return -1;
+
+ if ((flag & REF_ISPACKED)) {
+ struct ref_list *list = get_packed_refs();
+
+ while (list) {
+ if (!strcmp(list->name, ref)) {
+ if (list->flag & REF_KNOWS_PEELED) {
+ hashcpy(sha1, list->peeled);
+ return 0;
+ }
+ /* older pack-refs did not leave peeled ones */
+ break;
+ }
+ list = list->next;
+ }
+ }
+
+ /* fallback - callers should not call this for unpacked refs */
+ o = parse_object(base);
+ if (o->type == OBJ_TAG) {
+ o = deref_tag(o, ref, 0);
+ if (o) {
+ hashcpy(sha1, o->sha1);
+ return 0;
+ }
+ }
return -1;
}
-static int do_for_each_ref(const char *base, int (*fn)(const char *path, const unsigned char *sha1), int trim)
+static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
+ void *cb_data)
{
int retval;
struct ref_list *packed = get_packed_refs();
entry = packed;
packed = packed->next;
}
- if (strncmp(base, entry->name, trim))
- continue;
- if (is_null_sha1(entry->sha1))
- continue;
- if (!has_sha1_file(entry->sha1)) {
- error("%s does not point to a valid object!", entry->name);
- continue;
- }
- retval = fn(entry->name + trim, entry->sha1);
+ retval = do_one_ref(base, fn, trim, cb_data, entry);
if (retval)
return retval;
}
- packed = packed ? packed : loose;
- while (packed) {
- if (!strncmp(base, packed->name, trim)) {
- retval = fn(packed->name + trim, packed->sha1);
- if (retval)
- return retval;
- }
- packed = packed->next;
+ for (packed = packed ? packed : loose; packed; packed = packed->next) {
+ retval = do_one_ref(base, fn, trim, cb_data, packed);
+ if (retval)
+ return retval;
}
return 0;
}
-int head_ref(int (*fn)(const char *path, const unsigned char *sha1))
+int head_ref(each_ref_fn fn, void *cb_data)
{
unsigned char sha1[20];
- if (!read_ref("HEAD", sha1))
- return fn("HEAD", sha1);
+ int flag;
+
+ if (resolve_ref("HEAD", sha1, 1, &flag))
+ return fn("HEAD", sha1, flag, cb_data);
return 0;
}
-int for_each_ref(int (*fn)(const char *path, const unsigned char *sha1))
+int for_each_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/", fn, 0);
+ return do_for_each_ref("refs/", fn, 0, cb_data);
}
-int for_each_tag_ref(int (*fn)(const char *path, const unsigned char *sha1))
+int for_each_tag_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/tags/", fn, 10);
+ return do_for_each_ref("refs/tags/", fn, 10, cb_data);
}
-int for_each_branch_ref(int (*fn)(const char *path, const unsigned char *sha1))
+int for_each_branch_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/heads/", fn, 11);
+ return do_for_each_ref("refs/heads/", fn, 11, cb_data);
}
-int for_each_remote_ref(int (*fn)(const char *path, const unsigned char *sha1))
+int for_each_remote_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref("refs/remotes/", fn, 13);
+ return do_for_each_ref("refs/remotes/", fn, 13, cb_data);
}
+/* NEEDSWORK: This is only used by ssh-upload and it should go; the
+ * caller should do resolve_ref or read_ref like everybody else. Or
+ * maybe everybody else should use get_ref_sha1() instead of doing
+ * read_ref().
+ */
int get_ref_sha1(const char *ref, unsigned char *sha1)
{
if (check_ref_format(ref))
level++;
if (!ch) {
if (level < 2)
- return -1; /* at least of form "heads/blah" */
+ return -2; /* at least of form "heads/blah" */
return 0;
}
}
static struct ref_lock *verify_lock(struct ref_lock *lock,
const unsigned char *old_sha1, int mustexist)
{
- if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist)) {
+ if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist, NULL)) {
error("Can't verify ref %s", lock->ref_name);
unlock_ref(lock);
return NULL;
return lock;
}
-static struct ref_lock *lock_ref_sha1_basic(const char *ref,
- int plen,
- const unsigned char *old_sha1, int mustexist)
+static int remove_empty_dir_recursive(char *path, int len)
+{
+ DIR *dir = opendir(path);
+ struct dirent *e;
+ int ret = 0;
+
+ if (!dir)
+ return -1;
+ if (path[len-1] != '/')
+ path[len++] = '/';
+ while ((e = readdir(dir)) != NULL) {
+ struct stat st;
+ int namlen;
+ if ((e->d_name[0] == '.') &&
+ ((e->d_name[1] == 0) ||
+ ((e->d_name[1] == '.') && e->d_name[2] == 0)))
+ continue; /* "." and ".." */
+
+ namlen = strlen(e->d_name);
+ if ((len + namlen < PATH_MAX) &&
+ strcpy(path + len, e->d_name) &&
+ !lstat(path, &st) &&
+ S_ISDIR(st.st_mode) &&
+ !remove_empty_dir_recursive(path, len + namlen))
+ continue; /* happy */
+
+ /* path too long, stat fails, or non-directory still exists */
+ ret = -1;
+ break;
+ }
+ closedir(dir);
+ if (!ret) {
+ path[len] = 0;
+ ret = rmdir(path);
+ }
+ return ret;
+}
+
+static int remove_empty_directories(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.
+ */
+ char path[PATH_MAX];
+ int len = strlen(file);
+
+ if (len >= PATH_MAX) /* path too long ;-) */
+ return -1;
+ strcpy(path, file);
+ return remove_empty_dir_recursive(path, len);
+}
+
+static int is_refname_available(const char *ref, const char *oldref,
+ struct ref_list *list, int quiet)
+{
+ int namlen = strlen(ref); /* e.g. 'foo/bar' */
+ while (list) {
+ /* list->name could be 'foo' or 'foo/bar/baz' */
+ if (!oldref || strcmp(oldref, list->name)) {
+ int len = strlen(list->name);
+ int cmplen = (namlen < len) ? namlen : len;
+ const char *lead = (namlen < len) ? list->name : ref;
+ if (!strncmp(ref, list->name, cmplen) &&
+ lead[cmplen] == '/') {
+ if (!quiet)
+ error("'%s' exists; cannot create '%s'",
+ list->name, ref);
+ return 0;
+ }
+ }
+ list = list->next;
+ }
+ return 1;
+}
+
+static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int *flag)
{
char *ref_file;
const char *orig_ref = ref;
struct ref_lock *lock;
struct stat st;
+ int last_errno = 0;
+ int mustexist = (old_sha1 && !is_null_sha1(old_sha1));
lock = xcalloc(1, sizeof(struct ref_lock));
lock->lock_fd = -1;
- ref = resolve_ref(ref, lock->old_sha1, mustexist);
+ ref = resolve_ref(ref, lock->old_sha1, mustexist, flag);
+ if (!ref && 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_ref);
+ if (remove_empty_directories(ref_file)) {
+ last_errno = errno;
+ error("there are still refs under '%s'", orig_ref);
+ goto error_return;
+ }
+ ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, flag);
+ }
if (!ref) {
- int last_errno = errno;
+ last_errno = errno;
error("unable to resolve reference %s: %s",
orig_ref, strerror(errno));
- unlock_ref(lock);
- errno = last_errno;
- return NULL;
+ goto error_return;
}
+ /* 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 (is_null_sha1(lock->old_sha1) &&
+ !is_refname_available(ref, NULL, get_packed_refs(), 0))
+ goto error_return;
+
lock->lk = xcalloc(1, sizeof(struct lock_file));
lock->ref_name = xstrdup(ref);
lock->log_file = xstrdup(git_path("logs/%s", ref));
- ref_file = git_path(ref);
+ ref_file = git_path("%s", ref);
lock->force_write = lstat(ref_file, &st) && errno == ENOENT;
- if (safe_create_leading_directories(ref_file))
- die("unable to create directory for %s", ref_file);
+ if (safe_create_leading_directories(ref_file)) {
+ last_errno = errno;
+ error("unable to create directory for %s", ref_file);
+ goto error_return;
+ }
lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, 1);
return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock;
+
+ error_return:
+ unlock_ref(lock);
+ errno = last_errno;
+ return NULL;
}
-struct ref_lock *lock_ref_sha1(const char *ref,
- const unsigned char *old_sha1, int mustexist)
+struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1)
{
char refpath[PATH_MAX];
if (check_ref_format(ref))
return NULL;
strcpy(refpath, mkpath("refs/%s", ref));
- return lock_ref_sha1_basic(refpath, strlen(refpath),
- old_sha1, mustexist);
+ return lock_ref_sha1_basic(refpath, old_sha1, NULL);
}
-struct ref_lock *lock_any_ref_for_update(const char *ref,
- const unsigned char *old_sha1, int mustexist)
+struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1)
+{
+ return lock_ref_sha1_basic(ref, old_sha1, NULL);
+}
+
+static struct lock_file packlock;
+
+static int repack_without_ref(const char *refname)
+{
+ struct ref_list *list, *packed_ref_list;
+ int fd;
+ int found = 0;
+
+ packed_ref_list = get_packed_refs();
+ for (list = packed_ref_list; list; list = list->next) {
+ if (!strcmp(refname, list->name)) {
+ found = 1;
+ break;
+ }
+ }
+ if (!found)
+ return 0;
+ fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0);
+ if (fd < 0)
+ return error("cannot delete '%s' from packed refs", refname);
+
+ for (list = packed_ref_list; list; list = list->next) {
+ char line[PATH_MAX + 100];
+ int len;
+
+ if (!strcmp(refname, list->name))
+ continue;
+ len = snprintf(line, sizeof(line), "%s %s\n",
+ sha1_to_hex(list->sha1), list->name);
+ /* this should not happen but just being defensive */
+ if (len > sizeof(line))
+ die("too long a refname '%s'", list->name);
+ write_or_die(fd, line, len);
+ }
+ return commit_lock_file(&packlock);
+}
+
+int delete_ref(const char *refname, unsigned char *sha1)
{
- return lock_ref_sha1_basic(ref, strlen(ref), old_sha1, mustexist);
+ struct ref_lock *lock;
+ int err, i, ret = 0, flag = 0;
+
+ lock = lock_ref_sha1_basic(refname, sha1, &flag);
+ if (!lock)
+ return 1;
+ if (!(flag & REF_ISPACKED)) {
+ /* loose */
+ i = strlen(lock->lk->filename) - 5; /* .lock */
+ lock->lk->filename[i] = 0;
+ err = unlink(lock->lk->filename);
+ if (err) {
+ ret = 1;
+ error("unlink(%s) failed: %s",
+ lock->lk->filename, strerror(errno));
+ }
+ 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);
+
+ err = unlink(lock->log_file);
+ if (err && errno != ENOENT)
+ fprintf(stderr, "warning: unlink(%s) failed: %s",
+ lock->log_file, strerror(errno));
+ invalidate_cached_refs();
+ unlock_ref(lock);
+ return ret;
+}
+
+int rename_ref(const char *oldref, const char *newref, const char *logmsg)
+{
+ static const char renamed_ref[] = "RENAMED-REF";
+ 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", oldref), &loginfo);
+
+ if (S_ISLNK(loginfo.st_mode))
+ return error("reflog for %s is a symlink", oldref);
+
+ if (!resolve_ref(oldref, orig_sha1, 1, &flag))
+ return error("refname %s not found", oldref);
+
+ if (!is_refname_available(newref, oldref, get_packed_refs(), 0))
+ return 1;
+
+ if (!is_refname_available(newref, oldref, get_loose_refs(), 0))
+ return 1;
+
+ lock = lock_ref_sha1_basic(renamed_ref, NULL, NULL);
+ if (!lock)
+ return error("unable to lock %s", renamed_ref);
+ lock->force_write = 1;
+ if (write_ref_sha1(lock, orig_sha1, logmsg))
+ return error("unable to save current sha1 in %s", renamed_ref);
+
+ if (log && rename(git_path("logs/%s", oldref), git_path("tmp-renamed-log")))
+ return error("unable to move logfile logs/%s to tmp-renamed-log: %s",
+ oldref, strerror(errno));
+
+ if (delete_ref(oldref, orig_sha1)) {
+ error("unable to delete old %s", oldref);
+ goto rollback;
+ }
+
+ if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1)) {
+ if (errno==EISDIR) {
+ if (remove_empty_directories(git_path("%s", newref))) {
+ error("Directory not empty: %s", newref);
+ goto rollback;
+ }
+ } else {
+ error("unable to delete existing %s", newref);
+ goto rollback;
+ }
+ }
+
+ if (log && safe_create_leading_directories(git_path("logs/%s", newref))) {
+ error("unable to create directory for %s", newref);
+ goto rollback;
+ }
+
+ retry:
+ if (log && rename(git_path("tmp-renamed-log"), git_path("logs/%s", newref))) {
+ 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", newref))) {
+ error("Directory not empty: logs/%s", newref);
+ goto rollback;
+ }
+ goto retry;
+ } else {
+ error("unable to move logfile tmp-renamed-log to logs/%s: %s",
+ newref, strerror(errno));
+ goto rollback;
+ }
+ }
+ logmoved = log;
+
+ lock = lock_ref_sha1_basic(newref, NULL, NULL);
+ if (!lock) {
+ error("unable to lock %s for update", newref);
+ 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", newref);
+ goto rollback;
+ }
+
+ if (!strncmp(oldref, "refs/heads/", 11) &&
+ !strncmp(newref, "refs/heads/", 11)) {
+ char oldsection[1024], newsection[1024];
+
+ snprintf(oldsection, 1024, "branch.%s", oldref + 11);
+ snprintf(newsection, 1024, "branch.%s", newref + 11);
+ if (git_config_rename_section(oldsection, newsection) < 0)
+ return 1;
+ }
+
+ return 0;
+
+ rollback:
+ lock = lock_ref_sha1_basic(oldref, NULL, NULL);
+ if (!lock) {
+ error("unable to lock %s for rollback", oldref);
+ goto rollbacklog;
+ }
+
+ 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", oldref);
+ log_all_ref_updates = flag;
+
+ rollbacklog:
+ if (logmoved && rename(git_path("logs/%s", newref), git_path("logs/%s", oldref)))
+ error("unable to restore logfile %s from %s: %s",
+ oldref, newref, strerror(errno));
+ if (!logmoved && log &&
+ rename(git_path("tmp-renamed-log"), git_path("logs/%s", oldref)))
+ error("unable to restore logfile %s from tmp-renamed-log: %s",
+ oldref, strerror(errno));
+
+ return 1;
}
void unlock_ref(struct ref_lock *lock)
char *logrec;
const char *committer;
- if (log_all_ref_updates) {
+ if (log_all_ref_updates < 0)
+ log_all_ref_updates = !is_bare_repository();
+
+ if (log_all_ref_updates &&
+ (!strncmp(lock->ref_name, "refs/heads/", 11) ||
+ !strncmp(lock->ref_name, "refs/remotes/", 13))) {
if (safe_create_leading_directories(lock->log_file) < 0)
return error("unable to create directory for %s",
lock->log_file);
logfd = open(lock->log_file, oflags, 0666);
if (logfd < 0) {
- if (!log_all_ref_updates && errno == ENOENT)
+ if (!(oflags & O_CREAT) && errno == ENOENT)
return 0;
- return error("Unable to append to %s: %s",
- lock->log_file, strerror(errno));
+
+ if ((oflags & O_CREAT) && errno == EISDIR) {
+ if (remove_empty_directories(lock->log_file)) {
+ return error("There are still logs under '%s'",
+ lock->log_file);
+ }
+ logfd = open(lock->log_file, oflags, 0666);
+ }
+
+ if (logfd < 0)
+ return error("Unable to append to %s: %s",
+ lock->log_file, strerror(errno));
}
- committer = git_committer_info(1);
+ committer = git_committer_info(-1);
if (msg) {
maxlen = strlen(committer) + strlen(msg) + 2*40 + 5;
logrec = xmalloc(maxlen);
sha1_to_hex(sha1),
committer);
}
- written = len <= maxlen ? write(logfd, logrec, len) : -1;
+ written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1;
free(logrec);
close(logfd);
if (written != len)
unlock_ref(lock);
return 0;
}
- if (write(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 ||
- write(lock->lock_fd, &term, 1) != 1
+ if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 ||
+ write_in_full(lock->lock_fd, &term, 1) != 1
|| close(lock->lock_fd) < 0) {
error("Couldn't write %s", lock->lk->filename);
unlock_ref(lock);
return -1;
}
+ invalidate_cached_refs();
if (log_ref_write(lock, sha1, logmsg) < 0) {
unlock_ref(lock);
return -1;
return 0;
}
-int read_ref_at(const char *ref, unsigned long at_time, unsigned char *sha1)
+static char *ref_msg(const char *line, const char *endp)
+{
+ const char *ep;
+ char *msg;
+
+ line += 82;
+ for (ep = line; ep < endp && *ep != '\n'; ep++)
+ ;
+ msg = xmalloc(ep - line + 1);
+ memcpy(msg, line, ep - line);
+ msg[ep - line] = 0;
+ return msg;
+}
+
+int read_ref_at(const char *ref, 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;
+ int logfd, tz, reccnt = 0;
struct stat st;
unsigned long date;
unsigned char logged_sha1[20];
+ void *log_mapped;
logfile = git_path("logs/%s", ref);
logfd = open(logfile, O_RDONLY, 0);
fstat(logfd, &st);
if (!st.st_size)
die("Log %s is empty.", logfile);
- logdata = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, logfd, 0);
+ log_mapped = xmmap(NULL, st.st_size, 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;
if (!lastgt)
die("Log %s is corrupt.", logfile);
date = strtoul(lastgt + 1, &tz_c, 10);
- if (date <= at_time) {
+ 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)) {
- tz = strtoul(tz_c, NULL, 10);
fprintf(stderr,
"warning: Log %s has gap after %s.\n",
logfile, show_rfc2822_date(date, tz));
if (get_sha1_hex(rec + 41, logged_sha1))
die("Log %s is corrupt.", logfile);
if (hashcmp(logged_sha1, sha1)) {
- tz = strtoul(tz_c, NULL, 10);
fprintf(stderr,
"warning: Log %s unexpectedly ended on %s.\n",
logfile, show_rfc2822_date(date, tz));
}
}
- munmap((void*)logdata, st.st_size);
+ munmap(log_mapped, st.st_size);
return 0;
}
lastrec = rec;
+ if (cnt > 0)
+ cnt--;
}
rec = logdata;
tz = strtoul(tz_c, NULL, 10);
if (get_sha1_hex(logdata, sha1))
die("Log %s is corrupt.", logfile);
- munmap((void*)logdata, st.st_size);
- fprintf(stderr, "warning: Log %s only goes back to %s.\n",
- logfile, show_rfc2822_date(date, tz));
- return 0;
+ if (msg)
+ *msg = ref_msg(logdata, logend);
+ munmap(log_mapped, st.st_size);
+
+ if (cutoff_time)
+ *cutoff_time = date;
+ if (cutoff_tz)
+ *cutoff_tz = tz;
+ if (cutoff_cnt)
+ *cutoff_cnt = reccnt;
+ return 1;
+}
+
+int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
+{
+ const char *logfile;
+ FILE *logfp;
+ char buf[1024];
+ int ret = 0;
+
+ logfile = git_path("logs/%s", ref);
+ logfp = fopen(logfile, "r");
+ if (!logfp)
+ return -1;
+ while (fgets(buf, sizeof(buf), logfp)) {
+ unsigned char osha1[20], nsha1[20];
+ char *email_end, *message;
+ unsigned long timestamp;
+ int len, tz;
+
+ /* old SP new SP name <email> SP time TAB msg LF */
+ len = strlen(buf);
+ if (len < 83 || buf[len-1] != '\n' ||
+ get_sha1_hex(buf, osha1) || buf[40] != ' ' ||
+ get_sha1_hex(buf + 41, nsha1) || buf[81] != ' ' ||
+ !(email_end = strchr(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]) ||
+ message[6] != '\t')
+ continue; /* corrupt? */
+ email_end[1] = '\0';
+ tz = strtol(message + 1, NULL, 10);
+ message += 7;
+ ret = fn(osha1, nsha1, buf+82, timestamp, tz, message, cb_data);
+ if (ret)
+ break;
+ }
+ fclose(logfp);
+ return ret;
}
+