summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorJunio C Hamano <gitster@pobox.com>2015-02-11 13:43:38 -0800
committerJunio C Hamano <gitster@pobox.com>2015-02-11 13:43:38 -0800
commit4d5c4e498a14af732f3b0b690f8b551d18610bfc (patch)
tree4344d092252b2eaba66132a8718de0a404e092cc
parent1ba6e860b9589b237502f78c77059d6392f76fd8 (diff)
parentc653e0343d04ba89040c8ba18d7ca2e55ece6338 (diff)
downloadgit-4d5c4e498a14af732f3b0b690f8b551d18610bfc.tar.gz
Merge branch 'mh/reflog-expire'
Restructure "reflog expire" to fit the reflogs better with the recently updated ref API. Looked reasonable (except that some shortlog entries stood out like a sore thumb). * mh/reflog-expire: (24 commits) refs.c: let fprintf handle the formatting refs.c: don't expose the internal struct ref_lock in the header file lock_any_ref_for_update(): inline function refs.c: remove unlock_ref/close_ref/commit_ref from the refs api reflog_expire(): new function in the reference API expire_reflog(): treat the policy callback data as opaque Move newlog and last_kept_sha1 to "struct expire_reflog_cb" expire_reflog(): move rewrite to flags argument expire_reflog(): move verbose to flags argument expire_reflog(): pass flags through to expire_reflog_ent() struct expire_reflog_cb: a new callback data type Rename expire_reflog_cb to expire_reflog_policy_cb expire_reflog(): move updateref to flags argument expire_reflog(): move dry_run to flags argument expire_reflog(): add a "flags" argument expire_reflog(): extract two policy-related functions Extract function should_expire_reflog_ent() expire_reflog(): use a lock_file for rewriting the reflog file expire_reflog(): return early if the reference has no reflog expire_reflog(): rename "ref" parameter to "refname" ...
-rw-r--r--builtin/reflog.c259
-rw-r--r--refs.c263
-rw-r--r--refs.h75
3 files changed, 332 insertions, 265 deletions
diff --git a/builtin/reflog.c b/builtin/reflog.c
index 2d85d260ca..49c64f96d8 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -22,18 +22,13 @@ static unsigned long default_reflog_expire_unreachable;
struct cmd_reflog_expire_cb {
struct rev_info revs;
- int dry_run;
int stalefix;
- int rewrite;
- int updateref;
- int verbose;
unsigned long expire_total;
unsigned long expire_unreachable;
int recno;
};
-struct expire_reflog_cb {
- FILE *newlog;
+struct expire_reflog_policy_cb {
enum {
UE_NORMAL,
UE_ALWAYS,
@@ -41,14 +36,16 @@ struct expire_reflog_cb {
} unreachable_expire_kind;
struct commit_list *mark_list;
unsigned long mark_limit;
- struct cmd_reflog_expire_cb *cmd;
- unsigned char last_kept_sha1[20];
+ struct cmd_reflog_expire_cb cmd;
+ struct commit *tip_commit;
+ struct commit_list *tips;
};
struct collected_reflog {
unsigned char sha1[20];
char reflog[FLEX_ARRAY];
};
+
struct collect_reflog_cb {
struct collected_reflog **e;
int alloc;
@@ -220,7 +217,7 @@ static int keep_entry(struct commit **it, unsigned char *sha1)
* the expire_limit and queue them back, so that the caller can call
* us again to restart the traversal with longer expire_limit.
*/
-static void mark_reachable(struct expire_reflog_cb *cb)
+static void mark_reachable(struct expire_reflog_policy_cb *cb)
{
struct commit *commit;
struct commit_list *pending;
@@ -259,7 +256,7 @@ static void mark_reachable(struct expire_reflog_cb *cb)
cb->mark_list = leftover;
}
-static int unreachable(struct expire_reflog_cb *cb, struct commit *commit, unsigned char *sha1)
+static int unreachable(struct expire_reflog_policy_cb *cb, struct commit *commit, unsigned char *sha1)
{
/*
* We may or may not have the commit yet - if not, look it
@@ -288,55 +285,39 @@ static int unreachable(struct expire_reflog_cb *cb, struct commit *commit, unsig
return !(commit->object.flags & REACHABLE);
}
-static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
- const char *email, unsigned long timestamp, int tz,
- const char *message, void *cb_data)
+/*
+ * Return true iff the specified reflog entry should be expired.
+ */
+static int should_expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
+ const char *email, unsigned long timestamp, int tz,
+ const char *message, void *cb_data)
{
- struct expire_reflog_cb *cb = cb_data;
+ struct expire_reflog_policy_cb *cb = cb_data;
struct commit *old, *new;
- if (timestamp < cb->cmd->expire_total)
- goto prune;
-
- if (cb->cmd->rewrite)
- osha1 = cb->last_kept_sha1;
+ if (timestamp < cb->cmd.expire_total)
+ return 1;
old = new = NULL;
- if (cb->cmd->stalefix &&
+ if (cb->cmd.stalefix &&
(!keep_entry(&old, osha1) || !keep_entry(&new, nsha1)))
- goto prune;
+ return 1;
- if (timestamp < cb->cmd->expire_unreachable) {
+ if (timestamp < cb->cmd.expire_unreachable) {
if (cb->unreachable_expire_kind == UE_ALWAYS)
- goto prune;
+ return 1;
if (unreachable(cb, old, osha1) || unreachable(cb, new, nsha1))
- goto prune;
+ return 1;
}
- if (cb->cmd->recno && --(cb->cmd->recno) == 0)
- goto prune;
-
- if (cb->newlog) {
- char sign = (tz < 0) ? '-' : '+';
- int zone = (tz < 0) ? (-tz) : tz;
- fprintf(cb->newlog, "%s %s %s %lu %c%04d\t%s",
- sha1_to_hex(osha1), sha1_to_hex(nsha1),
- email, timestamp, sign, zone,
- message);
- hashcpy(cb->last_kept_sha1, nsha1);
- }
- if (cb->cmd->verbose)
- printf("keep %s", message);
- return 0;
- prune:
- if (!cb->newlog)
- printf("would prune %s", message);
- else if (cb->cmd->verbose)
- printf("prune %s", message);
+ if (cb->cmd.recno && --(cb->cmd.recno) == 0)
+ return 1;
+
return 0;
}
-static int push_tip_to_list(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
+static int push_tip_to_list(const char *refname, const unsigned char *sha1,
+ int flags, void *cb_data)
{
struct commit_list **list = cb_data;
struct commit *tip_commit;
@@ -349,104 +330,56 @@ static int push_tip_to_list(const char *refname, const unsigned char *sha1, int
return 0;
}
-static int expire_reflog(const char *ref, const unsigned char *sha1, int unused, void *cb_data)
+static void reflog_expiry_prepare(const char *refname,
+ const unsigned char *sha1,
+ void *cb_data)
{
- struct cmd_reflog_expire_cb *cmd = cb_data;
- struct expire_reflog_cb cb;
- struct ref_lock *lock;
- char *log_file, *newlog_path = NULL;
- struct commit *tip_commit;
- struct commit_list *tips;
- int status = 0;
-
- memset(&cb, 0, sizeof(cb));
-
- /*
- * we take the lock for the ref itself to prevent it from
- * getting updated.
- */
- lock = lock_any_ref_for_update(ref, sha1, 0, NULL);
- if (!lock)
- return error("cannot lock ref '%s'", ref);
- log_file = git_pathdup("logs/%s", ref);
- if (!reflog_exists(ref))
- goto finish;
- if (!cmd->dry_run) {
- newlog_path = git_pathdup("logs/%s.lock", ref);
- cb.newlog = fopen(newlog_path, "w");
- }
-
- cb.cmd = cmd;
+ struct expire_reflog_policy_cb *cb = cb_data;
- if (!cmd->expire_unreachable || !strcmp(ref, "HEAD")) {
- tip_commit = NULL;
- cb.unreachable_expire_kind = UE_HEAD;
+ if (!cb->cmd.expire_unreachable || !strcmp(refname, "HEAD")) {
+ cb->tip_commit = NULL;
+ cb->unreachable_expire_kind = UE_HEAD;
} else {
- tip_commit = lookup_commit_reference_gently(sha1, 1);
- if (!tip_commit)
- cb.unreachable_expire_kind = UE_ALWAYS;
+ cb->tip_commit = lookup_commit_reference_gently(sha1, 1);
+ if (!cb->tip_commit)
+ cb->unreachable_expire_kind = UE_ALWAYS;
else
- cb.unreachable_expire_kind = UE_NORMAL;
+ cb->unreachable_expire_kind = UE_NORMAL;
}
- if (cmd->expire_unreachable <= cmd->expire_total)
- cb.unreachable_expire_kind = UE_ALWAYS;
+ if (cb->cmd.expire_unreachable <= cb->cmd.expire_total)
+ cb->unreachable_expire_kind = UE_ALWAYS;
- cb.mark_list = NULL;
- tips = NULL;
- if (cb.unreachable_expire_kind != UE_ALWAYS) {
- if (cb.unreachable_expire_kind == UE_HEAD) {
+ cb->mark_list = NULL;
+ cb->tips = NULL;
+ if (cb->unreachable_expire_kind != UE_ALWAYS) {
+ if (cb->unreachable_expire_kind == UE_HEAD) {
struct commit_list *elem;
- for_each_ref(push_tip_to_list, &tips);
- for (elem = tips; elem; elem = elem->next)
- commit_list_insert(elem->item, &cb.mark_list);
+ for_each_ref(push_tip_to_list, &cb->tips);
+ for (elem = cb->tips; elem; elem = elem->next)
+ commit_list_insert(elem->item, &cb->mark_list);
} else {
- commit_list_insert(tip_commit, &cb.mark_list);
+ commit_list_insert(cb->tip_commit, &cb->mark_list);
}
- cb.mark_limit = cmd->expire_total;
- mark_reachable(&cb);
+ cb->mark_limit = cb->cmd.expire_total;
+ mark_reachable(cb);
}
+}
- for_each_reflog_ent(ref, expire_reflog_ent, &cb);
+static void reflog_expiry_cleanup(void *cb_data)
+{
+ struct expire_reflog_policy_cb *cb = cb_data;
- if (cb.unreachable_expire_kind != UE_ALWAYS) {
- if (cb.unreachable_expire_kind == UE_HEAD) {
+ if (cb->unreachable_expire_kind != UE_ALWAYS) {
+ if (cb->unreachable_expire_kind == UE_HEAD) {
struct commit_list *elem;
- for (elem = tips; elem; elem = elem->next)
+ for (elem = cb->tips; elem; elem = elem->next)
clear_commit_marks(elem->item, REACHABLE);
- free_commit_list(tips);
+ free_commit_list(cb->tips);
} else {
- clear_commit_marks(tip_commit, REACHABLE);
+ clear_commit_marks(cb->tip_commit, REACHABLE);
}
}
- finish:
- if (cb.newlog) {
- if (fclose(cb.newlog)) {
- status |= error("%s: %s", strerror(errno),
- newlog_path);
- unlink(newlog_path);
- } else if (cmd->updateref &&
- (write_in_full(lock->lock_fd,
- sha1_to_hex(cb.last_kept_sha1), 40) != 40 ||
- write_str_in_full(lock->lock_fd, "\n") != 1 ||
- close_ref(lock) < 0)) {
- status |= error("Couldn't write %s",
- lock->lk->filename.buf);
- unlink(newlog_path);
- } else if (rename(newlog_path, log_file)) {
- status |= error("cannot rename %s to %s",
- newlog_path, log_file);
- unlink(newlog_path);
- } else if (cmd->updateref && commit_ref(lock)) {
- status |= error("Couldn't set %s", lock->ref_name);
- } else {
- adjust_shared_perm(log_file);
- }
- }
- free(newlog_path);
- free(log_file);
- unlock_ref(lock);
- return status;
}
static int collect_reflog(const char *ref, const unsigned char *sha1, int unused, void *cb_data)
@@ -590,10 +523,11 @@ static void set_reflog_expiry_param(struct cmd_reflog_expire_cb *cb, int slot, c
static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
{
- struct cmd_reflog_expire_cb cb;
+ struct expire_reflog_policy_cb cb;
unsigned long now = time(NULL);
int i, status, do_all;
int explicit_expiry = 0;
+ unsigned int flags = 0;
default_reflog_expire_unreachable = now - 30 * 24 * 3600;
default_reflog_expire = now - 90 * 24 * 3600;
@@ -603,33 +537,33 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
do_all = status = 0;
memset(&cb, 0, sizeof(cb));
- cb.expire_total = default_reflog_expire;
- cb.expire_unreachable = default_reflog_expire_unreachable;
+ cb.cmd.expire_total = default_reflog_expire;
+ cb.cmd.expire_unreachable = default_reflog_expire_unreachable;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
- cb.dry_run = 1;
+ flags |= EXPIRE_REFLOGS_DRY_RUN;
else if (starts_with(arg, "--expire=")) {
- if (parse_expiry_date(arg + 9, &cb.expire_total))
+ if (parse_expiry_date(arg + 9, &cb.cmd.expire_total))
die(_("'%s' is not a valid timestamp"), arg);
explicit_expiry |= EXPIRE_TOTAL;
}
else if (starts_with(arg, "--expire-unreachable=")) {
- if (parse_expiry_date(arg + 21, &cb.expire_unreachable))
+ if (parse_expiry_date(arg + 21, &cb.cmd.expire_unreachable))
die(_("'%s' is not a valid timestamp"), arg);
explicit_expiry |= EXPIRE_UNREACH;
}
else if (!strcmp(arg, "--stale-fix"))
- cb.stalefix = 1;
+ cb.cmd.stalefix = 1;
else if (!strcmp(arg, "--rewrite"))
- cb.rewrite = 1;
+ flags |= EXPIRE_REFLOGS_REWRITE;
else if (!strcmp(arg, "--updateref"))
- cb.updateref = 1;
+ flags |= EXPIRE_REFLOGS_UPDATE_REF;
else if (!strcmp(arg, "--all"))
do_all = 1;
else if (!strcmp(arg, "--verbose"))
- cb.verbose = 1;
+ flags |= EXPIRE_REFLOGS_VERBOSE;
else if (!strcmp(arg, "--")) {
i++;
break;
@@ -645,12 +579,12 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
* even in older repository. We cannot trust what's reachable
* from reflog if the repository was pruned with older git.
*/
- if (cb.stalefix) {
- init_revisions(&cb.revs, prefix);
- if (cb.verbose)
+ if (cb.cmd.stalefix) {
+ init_revisions(&cb.cmd.revs, prefix);
+ if (flags & EXPIRE_REFLOGS_VERBOSE)
printf("Marking reachable objects...");
- mark_reachable_objects(&cb.revs, 0, 0, NULL);
- if (cb.verbose)
+ mark_reachable_objects(&cb.cmd.revs, 0, 0, NULL);
+ if (flags & EXPIRE_REFLOGS_VERBOSE)
putchar('\n');
}
@@ -662,8 +596,12 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
for_each_reflog(collect_reflog, &collected);
for (i = 0; i < collected.nr; i++) {
struct collected_reflog *e = collected.e[i];
- set_reflog_expiry_param(&cb, explicit_expiry, e->reflog);
- status |= expire_reflog(e->reflog, e->sha1, 0, &cb);
+ set_reflog_expiry_param(&cb.cmd, explicit_expiry, e->reflog);
+ status |= reflog_expire(e->reflog, e->sha1, flags,
+ reflog_expiry_prepare,
+ should_expire_reflog_ent,
+ reflog_expiry_cleanup,
+ &cb);
free(e);
}
free(collected.e);
@@ -676,8 +614,12 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
status |= error("%s points nowhere!", argv[i]);
continue;
}
- set_reflog_expiry_param(&cb, explicit_expiry, ref);
- status |= expire_reflog(ref, sha1, 0, &cb);
+ set_reflog_expiry_param(&cb.cmd, explicit_expiry, ref);
+ status |= reflog_expire(ref, sha1, flags,
+ reflog_expiry_prepare,
+ should_expire_reflog_ent,
+ reflog_expiry_cleanup,
+ &cb);
}
return status;
}
@@ -686,29 +628,30 @@ static int count_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
const char *email, unsigned long timestamp, int tz,
const char *message, void *cb_data)
{
- struct cmd_reflog_expire_cb *cb = cb_data;
- if (!cb->expire_total || timestamp < cb->expire_total)
- cb->recno++;
+ struct expire_reflog_policy_cb *cb = cb_data;
+ if (!cb->cmd.expire_total || timestamp < cb->cmd.expire_total)
+ cb->cmd.recno++;
return 0;
}
static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
{
- struct cmd_reflog_expire_cb cb;
+ struct expire_reflog_policy_cb cb;
int i, status = 0;
+ unsigned int flags = 0;
memset(&cb, 0, sizeof(cb));
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
- cb.dry_run = 1;
+ flags |= EXPIRE_REFLOGS_DRY_RUN;
else if (!strcmp(arg, "--rewrite"))
- cb.rewrite = 1;
+ flags |= EXPIRE_REFLOGS_REWRITE;
else if (!strcmp(arg, "--updateref"))
- cb.updateref = 1;
+ flags |= EXPIRE_REFLOGS_UPDATE_REF;
else if (!strcmp(arg, "--verbose"))
- cb.verbose = 1;
+ flags |= EXPIRE_REFLOGS_VERBOSE;
else if (!strcmp(arg, "--")) {
i++;
break;
@@ -740,15 +683,19 @@ static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
recno = strtoul(spec + 2, &ep, 10);
if (*ep == '}') {
- cb.recno = -recno;
+ cb.cmd.recno = -recno;
for_each_reflog_ent(ref, count_reflog_ent, &cb);
} else {
- cb.expire_total = approxidate(spec + 2);
+ cb.cmd.expire_total = approxidate(spec + 2);
for_each_reflog_ent(ref, count_reflog_ent, &cb);
- cb.expire_total = 0;
+ cb.cmd.expire_total = 0;
}
- status |= expire_reflog(ref, sha1, 0, &cb);
+ status |= reflog_expire(ref, sha1, flags,
+ reflog_expiry_prepare,
+ should_expire_reflog_ent,
+ reflog_expiry_cleanup,
+ &cb);
free(ref);
}
return status;
diff --git a/refs.c b/refs.c
index 9edf18b04e..ab2f2a92cd 100644
--- a/refs.c
+++ b/refs.c
@@ -6,6 +6,15 @@
#include "dir.h"
#include "string-list.h"
+struct ref_lock {
+ char *ref_name;
+ char *orig_ref_name;
+ struct lock_file *lk;
+ unsigned char old_sha1[20];
+ int lock_fd;
+ int force_write;
+};
+
/*
* How to handle various characters in refnames:
* 0: An acceptable character for refs
@@ -2093,6 +2102,16 @@ int refname_match(const char *abbrev_name, const char *full_name)
return 0;
}
+static void unlock_ref(struct ref_lock *lock)
+{
+ /* Do not free lock->lk -- atexit() still looks at them */
+ if (lock->lk)
+ rollback_lock_file(lock->lk);
+ free(lock->ref_name);
+ free(lock->orig_ref_name);
+ free(lock);
+}
+
/* This function should make sure errno is meaningful on error */
static struct ref_lock *verify_lock(struct ref_lock *lock,
const unsigned char *old_sha1, int mustexist)
@@ -2345,13 +2364,6 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
return NULL;
}
-struct ref_lock *lock_any_ref_for_update(const char *refname,
- const unsigned char *old_sha1,
- int flags, int *type_p)
-{
- return lock_ref_sha1_basic(refname, old_sha1, NULL, flags, type_p);
-}
-
/*
* Write an entry to the packed-refs file for the specified refname.
* If peeled is non-NULL, write it as the entry's peeled value.
@@ -2900,7 +2912,7 @@ int rename_ref(const char *oldrefname, const char *newrefname, const char *logms
return 1;
}
-int close_ref(struct ref_lock *lock)
+static int close_ref(struct ref_lock *lock)
{
if (close_lock_file(lock->lk))
return -1;
@@ -2908,7 +2920,7 @@ int close_ref(struct ref_lock *lock)
return 0;
}
-int commit_ref(struct ref_lock *lock)
+static int commit_ref(struct ref_lock *lock)
{
if (commit_lock_file(lock->lk))
return -1;
@@ -2916,16 +2928,6 @@ int commit_ref(struct ref_lock *lock)
return 0;
}
-void unlock_ref(struct ref_lock *lock)
-{
- /* Do not free lock->lk -- atexit() still looks at them */
- if (lock->lk)
- rollback_lock_file(lock->lk);
- free(lock->ref_name);
- free(lock->orig_ref_name);
- free(lock);
-}
-
/*
* copy the reflog message msg to buf, which has been allocated sufficiently
* large, while cleaning up the whitespaces. Especially, convert LF to space,
@@ -3002,15 +3004,37 @@ int log_ref_setup(const char *refname, char *logfile, int bufsize)
return 0;
}
+static int log_ref_write_fd(int fd, const unsigned char *old_sha1,
+ const unsigned char *new_sha1,
+ const char *committer, const char *msg)
+{
+ int msglen, written;
+ unsigned maxlen, len;
+ char *logrec;
+
+ msglen = msg ? strlen(msg) : 0;
+ maxlen = strlen(committer) + msglen + 100;
+ logrec = xmalloc(maxlen);
+ len = sprintf(logrec, "%s %s %s\n",
+ sha1_to_hex(old_sha1),
+ sha1_to_hex(new_sha1),
+ committer);
+ if (msglen)
+ len += copy_msg(logrec + len - 1, msg) - 1;
+
+ written = len <= maxlen ? write_in_full(fd, logrec, len) : -1;
+ free(logrec);
+ if (written != len)
+ return -1;
+
+ return 0;
+}
+
static int log_ref_write(const char *refname, const unsigned char *old_sha1,
const unsigned char *new_sha1, const char *msg)
{
- int logfd, result, written, oflags = O_APPEND | O_WRONLY;
- unsigned maxlen, len;
- int msglen;
+ int logfd, result, oflags = O_APPEND | O_WRONLY;
char log_file[PATH_MAX];
- char *logrec;
- const char *committer;
if (log_all_ref_updates < 0)
log_all_ref_updates = !is_bare_repository();
@@ -3022,19 +3046,9 @@ static int log_ref_write(const char *refname, const unsigned char *old_sha1,
logfd = open(log_file, oflags);
if (logfd < 0)
return 0;
- msglen = msg ? strlen(msg) : 0;
- committer = git_committer_info(0);
- maxlen = strlen(committer) + msglen + 100;
- logrec = xmalloc(maxlen);
- len = sprintf(logrec, "%s %s %s\n",
- sha1_to_hex(old_sha1),
- sha1_to_hex(new_sha1),
- committer);
- if (msglen)
- len += copy_msg(logrec + len - 1, msg) - 1;
- written = len <= maxlen ? write_in_full(logfd, logrec, len) : -1;
- free(logrec);
- if (written != len) {
+ result = log_ref_write_fd(logfd, old_sha1, new_sha1,
+ git_committer_info(0), msg);
+ if (result) {
int save_errno = errno;
close(logfd);
error("Unable to append to %s", log_file);
@@ -3660,31 +3674,8 @@ int ref_transaction_create(struct ref_transaction *transaction,
int flags, const char *msg,
struct strbuf *err)
{
- struct ref_update *update;
-
- assert(err);
-
- if (transaction->state != REF_TRANSACTION_OPEN)
- die("BUG: create called for transaction that is not open");
-
- if (!new_sha1 || is_null_sha1(new_sha1))
- die("BUG: create ref with null new_sha1");
-
- if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
- strbuf_addf(err, "refusing to create ref with bad name %s",
- refname);
- return -1;
- }
-
- update = add_update(transaction, refname);
-
- hashcpy(update->new_sha1, new_sha1);
- hashclr(update->old_sha1);
- update->flags = flags;
- update->have_old = 1;
- if (msg)
- update->msg = xstrdup(msg);
- return 0;
+ return ref_transaction_update(transaction, refname, new_sha1,
+ null_sha1, flags, 1, msg, err);
}
int ref_transaction_delete(struct ref_transaction *transaction,
@@ -3693,26 +3684,8 @@ int ref_transaction_delete(struct ref_transaction *transaction,
int flags, int have_old, const char *msg,
struct strbuf *err)
{
- struct ref_update *update;
-
- assert(err);
-
- if (transaction->state != REF_TRANSACTION_OPEN)
- die("BUG: delete called for transaction that is not open");
-
- if (have_old && !old_sha1)
- die("BUG: have_old is true but old_sha1 is NULL");
-
- update = add_update(transaction, refname);
- update->flags = flags;
- update->have_old = have_old;
- if (have_old) {
- assert(!is_null_sha1(old_sha1));
- hashcpy(update->old_sha1, old_sha1);
- }
- if (msg)
- update->msg = xstrdup(msg);
- return 0;
+ return ref_transaction_update(transaction, refname, null_sha1,
+ old_sha1, flags, have_old, msg, err);
}
int update_ref(const char *action, const char *refname,
@@ -4008,3 +3981,129 @@ int ref_is_hidden(const char *refname)
}
return 0;
}
+
+struct expire_reflog_cb {
+ unsigned int flags;
+ reflog_expiry_should_prune_fn *should_prune_fn;
+ void *policy_cb;
+ FILE *newlog;
+ unsigned char last_kept_sha1[20];
+};
+
+static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
+ const char *email, unsigned long timestamp, int tz,
+ const char *message, void *cb_data)
+{
+ struct expire_reflog_cb *cb = cb_data;
+ struct expire_reflog_policy_cb *policy_cb = cb->policy_cb;
+
+ if (cb->flags & EXPIRE_REFLOGS_REWRITE)
+ osha1 = cb->last_kept_sha1;
+
+ if ((*cb->should_prune_fn)(osha1, nsha1, email, timestamp, tz,
+ message, policy_cb)) {
+ if (!cb->newlog)
+ printf("would prune %s", message);
+ else if (cb->flags & EXPIRE_REFLOGS_VERBOSE)
+ printf("prune %s", message);
+ } else {
+ if (cb->newlog) {
+ fprintf(cb->newlog, "%s %s %s %lu %+05d\t%s",
+ sha1_to_hex(osha1), sha1_to_hex(nsha1),
+ email, timestamp, tz, message);
+ hashcpy(cb->last_kept_sha1, nsha1);
+ }
+ if (cb->flags & EXPIRE_REFLOGS_VERBOSE)
+ printf("keep %s", message);
+ }
+ return 0;
+}
+
+int reflog_expire(const char *refname, const unsigned char *sha1,
+ unsigned int flags,
+ reflog_expiry_prepare_fn prepare_fn,
+ reflog_expiry_should_prune_fn should_prune_fn,
+ reflog_expiry_cleanup_fn cleanup_fn,
+ void *policy_cb_data)
+{
+ static struct lock_file reflog_lock;
+ struct expire_reflog_cb cb;
+ struct ref_lock *lock;
+ char *log_file;
+ int status = 0;
+
+ memset(&cb, 0, sizeof(cb));
+ cb.flags = flags;
+ cb.policy_cb = policy_cb_data;
+ cb.should_prune_fn = should_prune_fn;
+
+ /*
+ * The reflog file is locked by holding the lock on the
+ * reference itself, plus we might need to update the
+ * reference if --updateref was specified:
+ */
+ lock = lock_ref_sha1_basic(refname, sha1, NULL, 0, NULL);
+ if (!lock)
+ return error("cannot lock ref '%s'", refname);
+ if (!reflog_exists(refname)) {
+ unlock_ref(lock);
+ return 0;
+ }
+
+ log_file = git_pathdup("logs/%s", refname);
+ if (!(flags & EXPIRE_REFLOGS_DRY_RUN)) {
+ /*
+ * Even though holding $GIT_DIR/logs/$reflog.lock has
+ * no locking implications, we use the lock_file
+ * machinery here anyway because it does a lot of the
+ * work we need, including cleaning up if the program
+ * exits unexpectedly.
+ */
+ if (hold_lock_file_for_update(&reflog_lock, log_file, 0) < 0) {
+ struct strbuf err = STRBUF_INIT;
+ unable_to_lock_message(log_file, errno, &err);
+ error("%s", err.buf);
+ strbuf_release(&err);
+ goto failure;
+ }
+ cb.newlog = fdopen_lock_file(&reflog_lock, "w");
+ if (!cb.newlog) {
+ error("cannot fdopen %s (%s)",
+ reflog_lock.filename.buf, strerror(errno));
+ goto failure;
+ }
+ }
+
+ (*prepare_fn)(refname, sha1, cb.policy_cb);
+ for_each_reflog_ent(refname, expire_reflog_ent, &cb);
+ (*cleanup_fn)(cb.policy_cb);
+
+ if (!(flags & EXPIRE_REFLOGS_DRY_RUN)) {
+ if (close_lock_file(&reflog_lock)) {
+ status |= error("couldn't write %s: %s", log_file,
+ strerror(errno));
+ } else if ((flags & EXPIRE_REFLOGS_UPDATE_REF) &&
+ (write_in_full(lock->lock_fd,
+ sha1_to_hex(cb.last_kept_sha1), 40) != 40 ||
+ write_str_in_full(lock->lock_fd, "\n") != 1 ||
+ close_ref(lock) < 0)) {
+ status |= error("couldn't write %s",
+ lock->lk->filename.buf);
+ rollback_lock_file(&reflog_lock);
+ } else if (commit_lock_file(&reflog_lock)) {
+ status |= error("unable to commit reflog '%s' (%s)",
+ log_file, strerror(errno));
+ } else if ((flags & EXPIRE_REFLOGS_UPDATE_REF) && commit_ref(lock)) {
+ status |= error("couldn't set %s", lock->ref_name);
+ }
+ }
+ free(log_file);
+ unlock_ref(lock);
+ return status;
+
+ failure:
+ rollback_lock_file(&reflog_lock);
+ free(log_file);
+ unlock_ref(lock);
+ return -1;
+}
diff --git a/refs.h b/refs.h
index 405c6572f1..afa3c4decd 100644
--- a/refs.h
+++ b/refs.h
@@ -1,15 +1,6 @@
#ifndef REFS_H
#define REFS_H
-struct ref_lock {
- char *ref_name;
- char *orig_ref_name;
- struct lock_file *lk;
- unsigned char old_sha1[20];
- int lock_fd;
- int force_write;
-};
-
/*
* A ref_transaction represents a collection of ref updates
* that should succeed or fail together.
@@ -189,8 +180,7 @@ extern int is_branch(const char *refname);
extern int peel_ref(const char *refname, unsigned char *sha1);
/*
- * Flags controlling lock_any_ref_for_update(), ref_transaction_update(),
- * ref_transaction_create(), etc.
+ * Flags controlling ref_transaction_update(), ref_transaction_create(), etc.
* REF_NODEREF: act on the ref directly, instead of dereferencing
* symbolic references.
* REF_DELETING: tolerate broken refs
@@ -199,21 +189,6 @@ extern int peel_ref(const char *refname, unsigned char *sha1);
*/
#define REF_NODEREF 0x01
#define REF_DELETING 0x02
-/*
- * This function sets errno to something meaningful on failure.
- */
-extern struct ref_lock *lock_any_ref_for_update(const char *refname,
- const unsigned char *old_sha1,
- int flags, int *type_p);
-
-/** Close the file descriptor owned by a lock and return the status */
-extern int close_ref(struct ref_lock *lock);
-
-/** Close and commit the ref locked by the lock */
-extern int commit_ref(struct ref_lock *lock);
-
-/** Release any lock taken but not written. **/
-extern void unlock_ref(struct ref_lock *lock);
/*
* Setup reflog before using. Set errno to something meaningful on failure.
@@ -291,7 +266,7 @@ struct ref_transaction *ref_transaction_begin(struct strbuf *err);
/*
* Add a reference update to transaction. new_sha1 is the value that
- * the reference should have after the update, or zeros if it should
+ * the reference should have after the update, or null_sha1 if it should
* be deleted. If have_old is true, then old_sha1 holds the value
* that the reference should have had before the update, or zeros if
* it must not have existed beforehand.
@@ -361,4 +336,50 @@ int update_ref(const char *action, const char *refname,
extern int parse_hide_refs_config(const char *var, const char *value, const char *);
extern int ref_is_hidden(const char *);
+enum expire_reflog_flags {
+ EXPIRE_REFLOGS_DRY_RUN = 1 << 0,
+ EXPIRE_REFLOGS_UPDATE_REF = 1 << 1,
+ EXPIRE_REFLOGS_VERBOSE = 1 << 2,
+ EXPIRE_REFLOGS_REWRITE = 1 << 3
+};
+
+/*
+ * The following interface is used for reflog expiration. The caller
+ * calls reflog_expire(), supplying it with three callback functions,
+ * of the following types. The callback functions define the
+ * expiration policy that is desired.
+ *
+ * reflog_expiry_prepare_fn -- Called once after the reference is
+ * locked.
+ *
+ * reflog_expiry_should_prune_fn -- Called once for each entry in the
+ * existing reflog. It should return true iff that entry should be
+ * pruned.
+ *
+ * reflog_expiry_cleanup_fn -- Called once before the reference is
+ * unlocked again.
+ */
+typedef void reflog_expiry_prepare_fn(const char *refname,
+ const unsigned char *sha1,
+ void *cb_data);
+typedef int reflog_expiry_should_prune_fn(unsigned char *osha1,
+ unsigned char *nsha1,
+ const char *email,
+ unsigned long timestamp, int tz,
+ const char *message, void *cb_data);
+typedef void reflog_expiry_cleanup_fn(void *cb_data);
+
+/*
+ * Expire reflog entries for the specified reference. sha1 is the old
+ * value of the reference. flags is a combination of the constants in
+ * enum expire_reflog_flags. The three function pointers are described
+ * above. On success, return zero.
+ */
+extern int reflog_expire(const char *refname, const unsigned char *sha1,
+ unsigned int flags,
+ reflog_expiry_prepare_fn prepare_fn,
+ reflog_expiry_should_prune_fn should_prune_fn,
+ reflog_expiry_cleanup_fn cleanup_fn,
+ void *policy_cb_data);
+
#endif /* REFS_H */