Add 'df_name_compare()' helper function

[git.git] / builtin-reflog.c

diff --git a/builtin-reflog.c b/builtin-reflog.c
index 4836ec951be727512bcd550dd3604c43c39aa557..280e24e1514f2989b571acc768d7067cbb223933 100644 (file)
--- a/builtin-reflog.c
+++ b/builtin-reflog.c
@@ -14,6 +14,8 @@
 
 static const char reflog_expire_usage[] =
 "git-reflog (show|expire) [--verbose] [--dry-run] [--stale-fix] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
+static const char reflog_delete_usage[] =
+"git-reflog delete [--verbose] [--dry-run] [--rewrite] [--updateref] <refs>...";
 
 static unsigned long default_reflog_expire;
 static unsigned long default_reflog_expire_unreachable;
@@ -22,9 +24,12 @@ 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 {
@@ -32,6 +37,7 @@ struct expire_reflog_cb {
        const char *ref;
        struct commit *ref_commit;
        struct cmd_reflog_expire_cb *cmd;
+       unsigned char last_kept_sha1[20];
 };
 
 struct collected_reflog {
@@ -213,6 +219,9 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
        if (timestamp < cb->cmd->expire_total)
                goto prune;
 
+       if (cb->cmd->rewrite)
+               osha1 = cb->last_kept_sha1;
+
        old = new = NULL;
        if (cb->cmd->stalefix &&
            (!keep_entry(&old, osha1) || !keep_entry(&new, nsha1)))
@@ -230,6 +239,9 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
                        goto prune;
        }
 
+       if (cb->cmd->recno && --(cb->cmd->recno) == 0)
+               goto prune;
+
        if (cb->newlog) {
                char sign = (tz < 0) ? '-' : '+';
                int zone = (tz < 0) ? (-tz) : tz;
@@ -237,6 +249,7 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
                        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);
@@ -276,13 +289,24 @@ static int expire_reflog(const char *ref, const unsigned char *sha1, int unused,
        for_each_reflog_ent(ref, expire_reflog_ent, &cb);
  finish:
        if (cb.newlog) {
-               if (fclose(cb.newlog))
+               if (fclose(cb.newlog)) {
                        status |= error("%s: %s", strerror(errno),
                                        newlog_path);
-               if (rename(newlog_path, log_file)) {
+                       unlink(newlog_path);
+               } else if (cmd->updateref &&
+                       (write_in_full(lock->lock_fd,
+                               sha1_to_hex(cb.last_kept_sha1), 40) != 40 ||
+                        write_in_full(lock->lock_fd, "\n", 1) != 1 ||
+                        close_ref(lock) < 0)) {
+                       status |= error("Couldn't write %s",
+                               lock->lk->filename);
+                       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);
                }
        }
        free(newlog_path);
@@ -357,6 +381,10 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
                        cb.expire_unreachable = approxidate(arg + 21);
                else if (!strcmp(arg, "--stale-fix"))
                        cb.stalefix = 1;
+               else if (!strcmp(arg, "--rewrite"))
+                       cb.rewrite = 1;
+               else if (!strcmp(arg, "--updateref"))
+                       cb.updateref = 1;
                else if (!strcmp(arg, "--all"))
                        do_all = 1;
                else if (!strcmp(arg, "--verbose"))
@@ -405,6 +433,78 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
        return status;
 }
 
+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++;
+       return 0;
+}
+
+static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
+{
+       struct cmd_reflog_expire_cb cb;
+       int i, status = 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;
+               else if (!strcmp(arg, "--rewrite"))
+                       cb.rewrite = 1;
+               else if (!strcmp(arg, "--updateref"))
+                       cb.updateref = 1;
+               else if (!strcmp(arg, "--verbose"))
+                       cb.verbose = 1;
+               else if (!strcmp(arg, "--")) {
+                       i++;
+                       break;
+               }
+               else if (arg[0] == '-')
+                       usage(reflog_delete_usage);
+               else
+                       break;
+       }
+
+       if (argc - i < 1)
+               return error("Nothing to delete?");
+
+       for ( ; i < argc; i++) {
+               const char *spec = strstr(argv[i], "@{");
+               unsigned char sha1[20];
+               char *ep, *ref;
+               int recno;
+
+               if (!spec) {
+                       status |= error("Not a reflog: %s", argv[i]);
+                       continue;
+               }
+
+               if (!dwim_ref(argv[i], spec - argv[i], sha1, &ref)) {
+                       status |= error("%s points nowhere!", argv[i]);
+                       continue;
+               }
+
+               recno = strtoul(spec + 2, &ep, 10);
+               if (*ep == '}') {
+                       cb.recno = -recno;
+                       for_each_reflog_ent(ref, count_reflog_ent, &cb);
+               } else {
+                       cb.expire_total = approxidate(spec + 2);
+                       for_each_reflog_ent(ref, count_reflog_ent, &cb);
+                       cb.expire_total = 0;
+               }
+
+               status |= expire_reflog(ref, sha1, 0, &cb);
+               free(ref);
+       }
+       return status;
+}
+
 /*
  * main "reflog"
  */
@@ -424,6 +524,9 @@ int cmd_reflog(int argc, const char **argv, const char *prefix)
        if (!strcmp(argv[1], "expire"))
                return cmd_reflog_expire(argc - 1, argv + 1, prefix);
 
+       if (!strcmp(argv[1], "delete"))
+               return cmd_reflog_delete(argc - 1, argv + 1, prefix);
+
        /* Not a recognized reflog command..*/
        usage(reflog_usage);
 }