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index cab4394ad180b5daf02889fea523fa54abf0560f..44c1c86e187568f8cf1224f2f540cb6b73db3469 100644 (file)
--- a/refs.c
+++ b/refs.c
#include "tag.h"
#include "dir.h"
-/* ISSYMREF=01 and ISPACKED=02 are public interfaces */
-#define REF_KNOWS_PEELED 04
-#define REF_BROKEN 010
+/* ISSYMREF=0x01, ISPACKED=0x02 and ISBROKEN=0x04 are public interfaces */
+#define REF_KNOWS_PEELED 0x10
struct ref_entry {
unsigned char flag; /* ISSYMREF? ISPACKED? */
@@ -134,15 +133,15 @@ static struct ref_entry *search_ref_array(struct ref_array *array, const char *n
* Future: need to be in "struct repository"
* when doing a full libification.
*/
-static struct cached_refs {
- struct cached_refs *next;
+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];
-} *cached_refs;
+} *ref_cache;
static struct ref_entry *current_ref;
array->refs = NULL;
}
-static void clear_cached_refs(struct cached_refs *ca)
+static void clear_packed_ref_cache(struct ref_cache *refs)
{
- if (ca->did_loose)
- free_ref_array(&ca->loose);
- if (ca->did_packed)
- free_ref_array(&ca->packed);
- ca->did_loose = ca->did_packed = 0;
+ if (refs->did_packed)
+ free_ref_array(&refs->packed);
+ refs->did_packed = 0;
}
-static struct cached_refs *create_cached_refs(const char *submodule)
+static void clear_loose_ref_cache(struct ref_cache *refs)
+{
+ if (refs->did_loose)
+ free_ref_array(&refs->loose);
+ refs->did_loose = 0;
+}
+
+static struct ref_cache *create_ref_cache(const char *submodule)
{
int len;
- struct cached_refs *refs;
+ struct ref_cache *refs;
if (!submodule)
submodule = "";
len = strlen(submodule) + 1;
- refs = xcalloc(1, sizeof(struct cached_refs) + len);
+ refs = xcalloc(1, sizeof(struct ref_cache) + len);
memcpy(refs->name, submodule, len);
return refs;
}
/*
- * Return a pointer to a cached_refs for the specified submodule. For
+ * 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.
*/
-static struct cached_refs *get_cached_refs(const char *submodule)
+static struct ref_cache *get_ref_cache(const char *submodule)
{
- struct cached_refs *refs = cached_refs;
+ struct ref_cache *refs = ref_cache;
if (!submodule)
submodule = "";
while (refs) {
refs = refs->next;
}
- refs = create_cached_refs(submodule);
- refs->next = cached_refs;
- cached_refs = refs;
+ refs = create_ref_cache(submodule);
+ refs->next = ref_cache;
+ ref_cache = refs;
return refs;
}
-static void invalidate_cached_refs(void)
+void invalidate_ref_cache(const char *submodule)
{
- struct cached_refs *refs = cached_refs;
- while (refs) {
- clear_cached_refs(refs);
- refs = refs->next;
- }
+ struct ref_cache *refs = get_ref_cache(submodule);
+ clear_packed_ref_cache(refs);
+ clear_loose_ref_cache(refs);
}
static void read_packed_refs(FILE *f, struct ref_array *array)
static struct ref_array *get_packed_refs(const char *submodule)
{
- struct cached_refs *refs = get_cached_refs(submodule);
+ struct ref_cache *refs = get_ref_cache(submodule);
if (!refs->did_packed) {
const char *packed_refs_file;
flag = 0;
if (resolve_gitlink_ref(submodule, ref, sha1) < 0) {
hashclr(sha1);
- flag |= REF_BROKEN;
+ flag |= REF_ISBROKEN;
}
} else
- if (!resolve_ref(ref, sha1, 1, &flag)) {
+ if (read_ref_full(ref, sha1, 1, &flag)) {
hashclr(sha1);
- flag |= REF_BROKEN;
+ flag |= REF_ISBROKEN;
}
add_ref(ref, sha1, flag, array, NULL);
}
static struct ref_array *get_loose_refs(const char *submodule)
{
- struct cached_refs *refs = get_cached_refs(submodule);
+ struct ref_cache *refs = get_ref_cache(submodule);
if (!refs->did_loose) {
get_ref_dir(submodule, "refs", &refs->loose);
@@ -501,7 +503,6 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *
ssize_t len;
char buffer[256];
static char ref_buffer[256];
- char path[PATH_MAX];
if (flag)
*flag = 0;
@@ -510,6 +511,7 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *
return NULL;
for (;;) {
+ char path[PATH_MAX];
struct stat st;
char *buf;
int fd;
@@ -582,21 +584,22 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *
*/
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)) {
- warning("symbolic reference in %s is formatted incorrectly",
- path);
+ if (flag)
+ *flag |= REF_ISBROKEN;
return NULL;
}
ref = strcpy(ref_buffer, buf);
- if (flag)
- *flag |= REF_ISSYMREF;
}
/* Please note that FETCH_HEAD has a second line containing other data. */
if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) {
- warning("reference in %s is formatted incorrectly", path);
+ if (flag)
+ *flag |= REF_ISBROKEN;
return NULL;
}
return ref;
void *cb_data;
};
-int read_ref(const char *ref, unsigned char *sha1)
+int read_ref_full(const char *ref, unsigned char *sha1, int reading, int *flags)
{
- if (resolve_ref(ref, sha1, 1, NULL))
+ if (resolve_ref(ref, sha1, reading, flags))
return 0;
return -1;
}
+int read_ref(const char *ref, unsigned char *sha1)
+{
+ return read_ref_full(ref, sha1, 1, NULL);
+}
+
#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)
return 0;
if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) {
- if (entry->flag & REF_BROKEN)
- return 0; /* ignore dangling symref */
+ 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;
goto fallback;
}
- if (!resolve_ref(ref, base, 1, &flag))
+ if (read_ref_full(ref, base, 1, &flag))
return -1;
if ((flag & REF_ISPACKED)) {
return 0;
}
- if (resolve_ref("HEAD", sha1, 1, &flag))
+ if (!read_ref_full("HEAD", sha1, 1, &flag))
return fn("HEAD", sha1, flag, cb_data);
return 0;
int flag;
strbuf_addf(&buf, "%sHEAD", get_git_namespace());
- if (resolve_ref(buf.buf, sha1, 1, &flag))
+ if (!read_ref_full(buf.buf, sha1, 1, &flag))
ret = fn(buf.buf, sha1, flag, cb_data);
strbuf_release(&buf);
@@ -1019,7 +1027,7 @@ int refname_match(const char *abbrev_name, const char *full_name, const char **r
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, NULL)) {
+ 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;
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);
+
+ if (ret == *len) {
+ size_t size;
+ *string = strbuf_detach(&buf, &size);
+ *len = size;
+ return (char *)*string;
+ }
+
+ return NULL;
+}
+
+int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
+{
+ char *last_branch = substitute_branch_name(&str, &len);
+ const char **p, *r;
+ int refs_found = 0;
+
+ *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;
+
+ this_result = refs_found ? sha1_from_ref : sha1;
+ mksnpath(fullref, sizeof(fullref), *p, len, str);
+ r = resolve_ref(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;
+}
+
+int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
+{
+ char *last_branch = substitute_branch_name(&str, &len);
+ const char **p;
+ int logs_found = 0;
+
+ *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;
+
+ mksnpath(path, sizeof(path), *p, len, str);
+ ref = resolve_ref(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;
+}
+
static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p)
{
char *ref_file;
ret |= repack_without_ref(refname);
unlink_or_warn(git_path("logs/%s", lock->ref_name));
- invalidate_cached_refs();
+ invalidate_ref_cache(NULL);
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;
if (!is_refname_available(newref, oldref, get_loose_refs(NULL), 0))
return 1;
- lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, 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));
goto rollback;
}
- if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) {
+ if (!read_ref_full(newref, sha1, 1, &flag) &&
+ delete_ref(newref, sha1, REF_NODEREF)) {
if (errno==EISDIR) {
if (remove_empty_directories(git_path("%s", newref))) {
error("Directory not empty: %s", newref);
unlock_ref(lock);
return -1;
}
- invalidate_cached_refs();
+ 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)) {
@@ -1846,7 +1935,7 @@ static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data)
retval = do_for_each_reflog(log, fn, cb_data);
} else {
unsigned char sha1[20];
- if (!resolve_ref(log, sha1, 0, NULL))
+ if (read_ref_full(log, sha1, 0, NULL))
retval = error("bad ref for %s", log);
else
retval = fn(log, sha1, 0, cb_data);
*/
for (j = 0; j < rules_to_fail; j++) {
const char *rule = ref_rev_parse_rules[j];
- unsigned char short_objectname[20];
char refname[PATH_MAX];
/* skip matched rule */
*/
mksnpath(refname, sizeof(refname),
rule, short_name_len, short_name);
- if (!read_ref(refname, short_objectname))
+ if (ref_exists(refname))
break;
}