Merge git://git.bogomips.org/git-svn
[gitweb.git] / refs.c
diff --git a/refs.c b/refs.c
index 33ced65a7801f8653d608a9580e237ce8df39ae2..26b001453bd1566f2ab3554fffeb63ec0437ceaa 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -275,10 +275,8 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
                                list = get_ref_dir(ref, list);
                                continue;
                        }
-                       if (!resolve_ref(ref, sha1, 1, &flag)) {
-                               error("%s points nowhere!", ref);
-                               continue;
-                       }
+                       if (!resolve_ref(ref, sha1, 1, &flag))
+                               hashclr(sha1);
                        list = add_ref(ref, sha1, flag, list, NULL);
                }
                free(ref);
@@ -287,6 +285,35 @@ static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
        return sort_ref_list(list);
 }
 
+struct warn_if_dangling_data {
+       const char *refname;
+       const char *msg_fmt;
+};
+
+static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1,
+                                  int flags, void *cb_data)
+{
+       struct warn_if_dangling_data *d = cb_data;
+       const char *resolves_to;
+       unsigned char junk[20];
+
+       if (!(flags & REF_ISSYMREF))
+               return 0;
+
+       resolves_to = resolve_ref(refname, junk, 0, NULL);
+       if (!resolves_to || strcmp(resolves_to, d->refname))
+               return 0;
+
+       printf(d->msg_fmt, refname);
+       return 0;
+}
+
+void warn_dangling_symref(const char *msg_fmt, const char *refname)
+{
+       struct warn_if_dangling_data data = { refname, msg_fmt };
+       for_each_rawref(warn_if_dangling_symref, &data);
+}
+
 static struct ref_list *get_loose_refs(void)
 {
        if (!cached_refs.did_loose) {
@@ -498,16 +525,19 @@ int read_ref(const char *ref, unsigned char *sha1)
        return -1;
 }
 
+#define DO_FOR_EACH_INCLUDE_BROKEN 01
 static int do_one_ref(const char *base, each_ref_fn fn, int trim,
-                     void *cb_data, struct ref_list *entry)
+                     int flags, 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;
+       if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) {
+               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;
+               }
        }
        current_ref = entry;
        return fn(entry->name + trim, entry->sha1, entry->flag, cb_data);
@@ -561,7 +591,7 @@ int peel_ref(const char *ref, unsigned char *sha1)
 }
 
 static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
-                          void *cb_data)
+                          int flags, void *cb_data)
 {
        int retval = 0;
        struct ref_list *packed = get_packed_refs();
@@ -570,7 +600,7 @@ static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
        struct ref_list *extra;
 
        for (extra = extra_refs; extra; extra = extra->next)
-               retval = do_one_ref(base, fn, trim, cb_data, extra);
+               retval = do_one_ref(base, fn, trim, flags, cb_data, extra);
 
        while (packed && loose) {
                struct ref_list *entry;
@@ -586,13 +616,13 @@ static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
                        entry = packed;
                        packed = packed->next;
                }
-               retval = do_one_ref(base, fn, trim, cb_data, entry);
+               retval = do_one_ref(base, fn, trim, flags, cb_data, entry);
                if (retval)
                        goto end_each;
        }
 
        for (packed = packed ? packed : loose; packed; packed = packed->next) {
-               retval = do_one_ref(base, fn, trim, cb_data, packed);
+               retval = do_one_ref(base, fn, trim, flags, cb_data, packed);
                if (retval)
                        goto end_each;
        }
@@ -614,22 +644,28 @@ int head_ref(each_ref_fn fn, void *cb_data)
 
 int for_each_ref(each_ref_fn fn, void *cb_data)
 {
-       return do_for_each_ref("refs/", fn, 0, cb_data);
+       return do_for_each_ref("refs/", fn, 0, 0, cb_data);
 }
 
 int for_each_tag_ref(each_ref_fn fn, void *cb_data)
 {
-       return do_for_each_ref("refs/tags/", fn, 10, cb_data);
+       return do_for_each_ref("refs/tags/", fn, 10, 0, cb_data);
 }
 
 int for_each_branch_ref(each_ref_fn fn, void *cb_data)
 {
-       return do_for_each_ref("refs/heads/", fn, 11, cb_data);
+       return do_for_each_ref("refs/heads/", fn, 11, 0, cb_data);
 }
 
 int for_each_remote_ref(each_ref_fn fn, void *cb_data)
 {
-       return do_for_each_ref("refs/remotes/", fn, 13, cb_data);
+       return do_for_each_ref("refs/remotes/", fn, 13, 0, cb_data);
+}
+
+int for_each_rawref(each_ref_fn fn, void *cb_data)
+{
+       return do_for_each_ref("refs/", fn, 0,
+                              DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
 }
 
 /*
@@ -658,6 +694,7 @@ static inline int bad_ref_char(int ch)
 int check_ref_format(const char *ref)
 {
        int ch, level, bad_type;
+       int ret = CHECK_REF_FORMAT_OK;
        const char *cp = ref;
 
        level = 0;
@@ -673,18 +710,18 @@ int check_ref_format(const char *ref)
                        return CHECK_REF_FORMAT_ERROR;
                bad_type = bad_ref_char(ch);
                if (bad_type) {
-                       return (bad_type == 2 && !*cp)
-                               ? CHECK_REF_FORMAT_WILDCARD
-                               : CHECK_REF_FORMAT_ERROR;
+                       if (bad_type == 2 && (!*cp || *cp == '/') &&
+                           ret == CHECK_REF_FORMAT_OK)
+                               ret = CHECK_REF_FORMAT_WILDCARD;
+                       else
+                               return CHECK_REF_FORMAT_ERROR;
                }
 
                /* scan the rest of the path component */
                while ((ch = *cp++) != 0) {
                        bad_type = bad_ref_char(ch);
                        if (bad_type) {
-                               return (bad_type == 2 && !*cp)
-                                       ? CHECK_REF_FORMAT_WILDCARD
-                                       : CHECK_REF_FORMAT_ERROR;
+                               return CHECK_REF_FORMAT_ERROR;
                        }
                        if (ch == '/')
                                break;
@@ -695,11 +732,21 @@ int check_ref_format(const char *ref)
                if (!ch) {
                        if (level < 2)
                                return CHECK_REF_FORMAT_ONELEVEL;
-                       return CHECK_REF_FORMAT_OK;
+                       return ret;
                }
        }
 }
 
+const char *prettify_ref(const struct ref *ref)
+{
+       const char *name = ref->name;
+       return name + (
+               !prefixcmp(name, "refs/heads/") ? 11 :
+               !prefixcmp(name, "refs/tags/") ? 10 :
+               !prefixcmp(name, "refs/remotes/") ? 13 :
+               0);
+}
+
 const char *ref_rev_parse_rules[] = {
        "%.*s",
        "refs/%.*s",
@@ -959,7 +1006,7 @@ int delete_ref(const char *refname, const unsigned char *sha1, int delopt)
 
        err = unlink(git_path("logs/%s", lock->ref_name));
        if (err && errno != ENOENT)
-               fprintf(stderr, "warning: unlink(%s) failed: %s",
+               warning("unlink(%s) failed: %s",
                        git_path("logs/%s", lock->ref_name), strerror(errno));
        invalidate_cached_refs();
        unlock_ref(lock);
@@ -1401,8 +1448,7 @@ int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *
                                if (get_sha1_hex(rec + 41, sha1))
                                        die("Log %s is corrupt.", logfile);
                                if (hashcmp(logged_sha1, sha1)) {
-                                       fprintf(stderr,
-                                               "warning: Log %s has gap after %s.\n",
+                                       warning("Log %s has gap after %s.",
                                                logfile, show_date(date, tz, DATE_RFC2822));
                                }
                        }
@@ -1414,8 +1460,7 @@ int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *
                                if (get_sha1_hex(rec + 41, logged_sha1))
                                        die("Log %s is corrupt.", logfile);
                                if (hashcmp(logged_sha1, sha1)) {
-                                       fprintf(stderr,
-                                               "warning: Log %s unexpectedly ended on %s.\n",
+                                       warning("Log %s unexpectedly ended on %s.",
                                                logfile, show_date(date, tz, DATE_RFC2822));
                                }
                        }
@@ -1453,7 +1498,7 @@ int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *
        return 1;
 }
 
-int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
+int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, void *cb_data)
 {
        const char *logfile;
        FILE *logfp;
@@ -1464,6 +1509,16 @@ int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
        logfp = fopen(logfile, "r");
        if (!logfp)
                return -1;
+
+       if (ofs) {
+               struct stat statbuf;
+               if (fstat(fileno(logfp), &statbuf) ||
+                   statbuf.st_size < ofs ||
+                   fseek(logfp, -ofs, SEEK_END) ||
+                   fgets(buf, sizeof(buf), logfp))
+                       return -1;
+       }
+
        while (fgets(buf, sizeof(buf), logfp)) {
                unsigned char osha1[20], nsha1[20];
                char *email_end, *message;
@@ -1497,6 +1552,11 @@ int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
        return ret;
 }
 
+int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
+{
+       return for_each_recent_reflog_ent(ref, fn, 0, cb_data);
+}
+
 static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data)
 {
        DIR *dir = opendir(git_path("logs/%s", base));
@@ -1577,10 +1637,10 @@ int update_ref(const char *action, const char *refname,
        return 0;
 }
 
-struct ref *find_ref_by_name(struct ref *list, const char *name)
+struct ref *find_ref_by_name(const struct ref *list, const char *name)
 {
        for ( ; list; list = list->next)
                if (!strcmp(list->name, name))
-                       return list;
+                       return (struct ref *)list;
        return NULL;
 }