Merge branch 'jn/show-normalized-refs'
[gitweb.git] / builtin-branch.c
index 23b6949fec30e8276d0ef3d34e0aaee10eb49165..05e876e28554fec546ee4256bf3576dcb8017047 100644 (file)
@@ -32,18 +32,18 @@ static unsigned char head_sha1[20];
 
 static int branch_use_color = -1;
 static char branch_colors[][COLOR_MAXLEN] = {
-       "\033[m",       /* reset */
-       "",             /* PLAIN (normal) */
-       "\033[31m",     /* REMOTE (red) */
-       "",             /* LOCAL (normal) */
-       "\033[32m",     /* CURRENT (green) */
+       GIT_COLOR_RESET,
+       GIT_COLOR_NORMAL,       /* PLAIN */
+       GIT_COLOR_RED,          /* REMOTE */
+       GIT_COLOR_NORMAL,       /* LOCAL */
+       GIT_COLOR_GREEN,        /* CURRENT */
 };
 enum color_branch {
-       COLOR_BRANCH_RESET = 0,
-       COLOR_BRANCH_PLAIN = 1,
-       COLOR_BRANCH_REMOTE = 2,
-       COLOR_BRANCH_LOCAL = 3,
-       COLOR_BRANCH_CURRENT = 4,
+       BRANCH_COLOR_RESET = 0,
+       BRANCH_COLOR_PLAIN = 1,
+       BRANCH_COLOR_REMOTE = 2,
+       BRANCH_COLOR_LOCAL = 3,
+       BRANCH_COLOR_CURRENT = 4,
 };
 
 static enum merge_filter {
@@ -56,15 +56,15 @@ static unsigned char merge_filter_ref[20];
 static int parse_branch_color_slot(const char *var, int ofs)
 {
        if (!strcasecmp(var+ofs, "plain"))
-               return COLOR_BRANCH_PLAIN;
+               return BRANCH_COLOR_PLAIN;
        if (!strcasecmp(var+ofs, "reset"))
-               return COLOR_BRANCH_RESET;
+               return BRANCH_COLOR_RESET;
        if (!strcasecmp(var+ofs, "remote"))
-               return COLOR_BRANCH_REMOTE;
+               return BRANCH_COLOR_REMOTE;
        if (!strcasecmp(var+ofs, "local"))
-               return COLOR_BRANCH_LOCAL;
+               return BRANCH_COLOR_LOCAL;
        if (!strcasecmp(var+ofs, "current"))
-               return COLOR_BRANCH_CURRENT;
+               return BRANCH_COLOR_CURRENT;
        die("bad config variable '%s'", var);
 }
 
@@ -99,6 +99,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
        const char *fmt, *remote;
        int i;
        int ret = 0;
+       struct strbuf bname = STRBUF_INIT;
 
        switch (kinds) {
        case REF_REMOTE_BRANCH:
@@ -119,20 +120,21 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
                if (!head_rev)
                        die("Couldn't look up commit object for HEAD");
        }
-       for (i = 0; i < argc; i++) {
-               if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) {
+       for (i = 0; i < argc; i++, strbuf_release(&bname)) {
+               strbuf_branchname(&bname, argv[i]);
+               if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
                        error("Cannot delete the branch '%s' "
-                               "which you are currently on.", argv[i]);
+                             "which you are currently on.", bname.buf);
                        ret = 1;
                        continue;
                }
 
                free(name);
 
-               name = xstrdup(mkpath(fmt, argv[i]));
+               name = xstrdup(mkpath(fmt, bname.buf));
                if (!resolve_ref(name, sha1, 1, NULL)) {
                        error("%sbranch '%s' not found.",
-                                       remote, argv[i]);
+                                       remote, bname.buf);
                        ret = 1;
                        continue;
                }
@@ -152,22 +154,23 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
                if (!force &&
                    !in_merge_bases(rev, &head_rev, 1)) {
                        error("The branch '%s' is not an ancestor of "
-                               "your current HEAD.\n"
-                               "If you are sure you want to delete it, "
-                               "run 'git branch -D %s'.", argv[i], argv[i]);
+                             "your current HEAD.\n"
+                             "If you are sure you want to delete it, "
+                             "run 'git branch -D %s'.", bname.buf, bname.buf);
                        ret = 1;
                        continue;
                }
 
                if (delete_ref(name, sha1, 0)) {
                        error("Error deleting %sbranch '%s'", remote,
-                              argv[i]);
+                             bname.buf);
                        ret = 1;
                } else {
                        struct strbuf buf = STRBUF_INIT;
-                       printf("Deleted %sbranch %s (was %s).\n", remote, argv[i],
-                               find_unique_abbrev(sha1, DEFAULT_ABBREV));
-                       strbuf_addf(&buf, "branch.%s", argv[i]);
+                       printf("Deleted %sbranch %s (was %s).\n", remote,
+                              bname.buf,
+                              find_unique_abbrev(sha1, DEFAULT_ABBREV));
+                       strbuf_addf(&buf, "branch.%s", bname.buf);
                        if (git_config_rename_section(buf.buf, NULL) < 0)
                                warning("Update of config-file failed");
                        strbuf_release(&buf);
@@ -181,31 +184,31 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
 
 struct ref_item {
        char *name;
-       unsigned int kind;
+       char *dest;
+       unsigned int kind, len;
        struct commit *commit;
 };
 
 struct ref_list {
        struct rev_info revs;
-       int index, alloc, maxwidth;
+       int index, alloc, maxwidth, verbose, abbrev;
        struct ref_item *list;
        struct commit_list *with_commit;
        int kinds;
 };
 
-static int has_commit(struct commit *commit, struct commit_list *with_commit)
+static char *resolve_symref(const char *src, const char *prefix)
 {
-       if (!with_commit)
-               return 1;
-       while (with_commit) {
-               struct commit *other;
-
-               other = with_commit->item;
-               with_commit = with_commit->next;
-               if (in_merge_bases(other, &commit, 1))
-                       return 1;
-       }
-       return 0;
+       unsigned char sha1[20];
+       int flag;
+       const char *dst, *cp;
+
+       dst = resolve_ref(src, sha1, 0, &flag);
+       if (!(dst && (flag & REF_ISSYMREF)))
+               return NULL;
+       if (prefix && (cp = skip_prefix(dst, prefix)))
+               dst = cp;
+       return xstrdup(dst);
 }
 
 static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
@@ -213,34 +216,48 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags,
        struct ref_list *ref_list = (struct ref_list*)(cb_data);
        struct ref_item *newitem;
        struct commit *commit;
-       int kind;
-       int len;
+       int kind, i;
+       const char *prefix, *orig_refname = refname;
+
+       static struct {
+               int kind;
+               const char *prefix;
+               int pfxlen;
+       } ref_kind[] = {
+               { REF_LOCAL_BRANCH, "refs/heads/", 11 },
+               { REF_REMOTE_BRANCH, "refs/remotes/", 13 },
+       };
 
        /* Detect kind */
-       if (!prefixcmp(refname, "refs/heads/")) {
-               kind = REF_LOCAL_BRANCH;
-               refname += 11;
-       } else if (!prefixcmp(refname, "refs/remotes/")) {
-               kind = REF_REMOTE_BRANCH;
-               refname += 13;
-       } else
-               return 0;
-
-       commit = lookup_commit_reference_gently(sha1, 1);
-       if (!commit)
-               return error("branch '%s' does not point at a commit", refname);
-
-       /* Filter with with_commit if specified */
-       if (!has_commit(commit, ref_list->with_commit))
+       for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
+               prefix = ref_kind[i].prefix;
+               if (strncmp(refname, prefix, ref_kind[i].pfxlen))
+                       continue;
+               kind = ref_kind[i].kind;
+               refname += ref_kind[i].pfxlen;
+               break;
+       }
+       if (ARRAY_SIZE(ref_kind) <= i)
                return 0;
 
        /* Don't add types the caller doesn't want */
        if ((kind & ref_list->kinds) == 0)
                return 0;
 
-       if (merge_filter != NO_FILTER)
-               add_pending_object(&ref_list->revs,
-                                  (struct object *)commit, refname);
+       commit = NULL;
+       if (ref_list->verbose || ref_list->with_commit || merge_filter != NO_FILTER) {
+               commit = lookup_commit_reference_gently(sha1, 1);
+               if (!commit)
+                       return error("branch '%s' does not point at a commit", refname);
+
+               /* Filter with with_commit if specified */
+               if (!is_descendant_of(commit, ref_list->with_commit))
+                       return 0;
+
+               if (merge_filter != NO_FILTER)
+                       add_pending_object(&ref_list->revs,
+                                          (struct object *)commit, refname);
+       }
 
        /* Resize buffer */
        if (ref_list->index >= ref_list->alloc) {
@@ -254,9 +271,14 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags,
        newitem->name = xstrdup(refname);
        newitem->kind = kind;
        newitem->commit = commit;
-       len = strlen(newitem->name);
-       if (len > ref_list->maxwidth)
-               ref_list->maxwidth = len;
+       newitem->len = strlen(refname);
+       newitem->dest = resolve_symref(orig_refname, prefix);
+       /* adjust for "remotes/" */
+       if (newitem->kind == REF_REMOTE_BRANCH &&
+           ref_list->kinds != REF_REMOTE_BRANCH)
+               newitem->len += 8;
+       if (newitem->len > ref_list->maxwidth)
+               ref_list->maxwidth = newitem->len;
 
        return 0;
 }
@@ -265,8 +287,10 @@ static void free_ref_list(struct ref_list *ref_list)
 {
        int i;
 
-       for (i = 0; i < ref_list->index; i++)
+       for (i = 0; i < ref_list->index; i++) {
                free(ref_list->list[i].name);
+               free(ref_list->list[i].dest);
+       }
        free(ref_list->list);
 }
 
@@ -280,19 +304,30 @@ static int ref_cmp(const void *r1, const void *r2)
        return strcmp(c1->name, c2->name);
 }
 
-static void fill_tracking_info(struct strbuf *stat, const char *branch_name)
+static void fill_tracking_info(struct strbuf *stat, const char *branch_name,
+               int show_upstream_ref)
 {
        int ours, theirs;
        struct branch *branch = branch_get(branch_name);
 
-       if (!stat_tracking_info(branch, &ours, &theirs) || (!ours && !theirs))
+       if (!stat_tracking_info(branch, &ours, &theirs)) {
+               if (branch && branch->merge && branch->merge[0]->dst &&
+                   show_upstream_ref)
+                       strbuf_addf(stat, "[%s] ",
+                           shorten_unambiguous_ref(branch->merge[0]->dst, 0));
                return;
+       }
+
+       strbuf_addch(stat, '[');
+       if (show_upstream_ref)
+               strbuf_addf(stat, "%s: ",
+                       shorten_unambiguous_ref(branch->merge[0]->dst, 0));
        if (!ours)
-               strbuf_addf(stat, "[behind %d] ", theirs);
+               strbuf_addf(stat, "behind %d] ", theirs);
        else if (!theirs)
-               strbuf_addf(stat, "[ahead %d] ", ours);
+               strbuf_addf(stat, "ahead %d] ", ours);
        else
-               strbuf_addf(stat, "[ahead %d, behind %d] ", ours, theirs);
+               strbuf_addf(stat, "ahead %d, behind %d] ", ours, theirs);
 }
 
 static int matches_merge_filter(struct commit *commit)
@@ -307,85 +342,115 @@ static int matches_merge_filter(struct commit *commit)
 }
 
 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
-                          int abbrev, int current)
+                          int abbrev, int current, char *prefix)
 {
        char c;
        int color;
        struct commit *commit = item->commit;
+       struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
 
        if (!matches_merge_filter(commit))
                return;
 
        switch (item->kind) {
        case REF_LOCAL_BRANCH:
-               color = COLOR_BRANCH_LOCAL;
+               color = BRANCH_COLOR_LOCAL;
                break;
        case REF_REMOTE_BRANCH:
-               color = COLOR_BRANCH_REMOTE;
+               color = BRANCH_COLOR_REMOTE;
                break;
        default:
-               color = COLOR_BRANCH_PLAIN;
+               color = BRANCH_COLOR_PLAIN;
                break;
        }
 
        c = ' ';
        if (current) {
                c = '*';
-               color = COLOR_BRANCH_CURRENT;
+               color = BRANCH_COLOR_CURRENT;
        }
 
-       if (verbose) {
+       strbuf_addf(&name, "%s%s", prefix, item->name);
+       if (verbose)
+               strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
+                           maxwidth, name.buf,
+                           branch_get_color(BRANCH_COLOR_RESET));
+       else
+               strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
+                           name.buf, branch_get_color(BRANCH_COLOR_RESET));
+
+       if (item->dest)
+               strbuf_addf(&out, " -> %s", item->dest);
+       else if (verbose) {
                struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
                const char *sub = " **** invalid ref ****";
 
                commit = item->commit;
                if (commit && !parse_commit(commit)) {
+                       struct pretty_print_context ctx = {0};
                        pretty_print_commit(CMIT_FMT_ONELINE, commit,
-                                           &subject, 0, NULL, NULL, 0, 0);
+                                           &subject, &ctx);
                        sub = subject.buf;
                }
 
                if (item->kind == REF_LOCAL_BRANCH)
-                       fill_tracking_info(&stat, item->name);
+                       fill_tracking_info(&stat, item->name, verbose > 1);
 
-               printf("%c %s%-*s%s %s %s%s\n", c, branch_get_color(color),
-                      maxwidth, item->name,
-                      branch_get_color(COLOR_BRANCH_RESET),
-                      find_unique_abbrev(item->commit->object.sha1, abbrev),
-                      stat.buf, sub);
+               strbuf_addf(&out, " %s %s%s",
+                       find_unique_abbrev(item->commit->object.sha1, abbrev),
+                       stat.buf, sub);
                strbuf_release(&stat);
                strbuf_release(&subject);
-       } else {
-               printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
-                      branch_get_color(COLOR_BRANCH_RESET));
        }
+       printf("%s\n", out.buf);
+       strbuf_release(&name);
+       strbuf_release(&out);
 }
 
 static int calc_maxwidth(struct ref_list *refs)
 {
-       int i, l, w = 0;
+       int i, w = 0;
        for (i = 0; i < refs->index; i++) {
                if (!matches_merge_filter(refs->list[i].commit))
                        continue;
-               l = strlen(refs->list[i].name);
-               if (l > w)
-                       w = l;
+               if (refs->list[i].len > w)
+                       w = refs->list[i].len;
        }
        return w;
 }
 
+
+static void show_detached(struct ref_list *ref_list)
+{
+       struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
+
+       if (head_commit && is_descendant_of(head_commit, ref_list->with_commit)) {
+               struct ref_item item;
+               item.name = xstrdup("(no branch)");
+               item.len = strlen(item.name);
+               item.kind = REF_LOCAL_BRANCH;
+               item.dest = NULL;
+               item.commit = head_commit;
+               if (item.len > ref_list->maxwidth)
+                       ref_list->maxwidth = item.len;
+               print_ref_item(&item, ref_list->maxwidth, ref_list->verbose, ref_list->abbrev, 1, "");
+               free(item.name);
+       }
+}
+
 static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
 {
        int i;
        struct ref_list ref_list;
-       struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
 
        memset(&ref_list, 0, sizeof(ref_list));
        ref_list.kinds = kinds;
+       ref_list.verbose = verbose;
+       ref_list.abbrev = abbrev;
        ref_list.with_commit = with_commit;
        if (merge_filter != NO_FILTER)
                init_revisions(&ref_list.revs, NULL);
-       for_each_ref(append_ref, &ref_list);
+       for_each_rawref(append_ref, &ref_list);
        if (merge_filter != NO_FILTER) {
                struct commit *filter;
                filter = lookup_commit_reference_gently(merge_filter_ref, 0);
@@ -401,23 +466,18 @@ static void print_ref_list(int kinds, int detached, int verbose, int abbrev, str
        qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 
        detached = (detached && (kinds & REF_LOCAL_BRANCH));
-       if (detached && head_commit && has_commit(head_commit, with_commit)) {
-               struct ref_item item;
-               item.name = xstrdup("(no branch)");
-               item.kind = REF_LOCAL_BRANCH;
-               item.commit = head_commit;
-               if (strlen(item.name) > ref_list.maxwidth)
-                       ref_list.maxwidth = strlen(item.name);
-               print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
-               free(item.name);
-       }
+       if (detached)
+               show_detached(&ref_list);
 
        for (i = 0; i < ref_list.index; i++) {
                int current = !detached &&
                        (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
                        !strcmp(ref_list.list[i].name, head);
+               char *prefix = (kinds != REF_REMOTE_BRANCH &&
+                               ref_list.list[i].kind == REF_REMOTE_BRANCH)
+                               ? "remotes/" : "";
                print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
-                              abbrev, current);
+                              abbrev, current, prefix);
        }
 
        free_ref_list(&ref_list);
@@ -428,22 +488,27 @@ static void rename_branch(const char *oldname, const char *newname, int force)
        struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
        unsigned char sha1[20];
        struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
+       int recovery = 0;
 
        if (!oldname)
                die("cannot rename the current branch while not on any.");
 
-       strbuf_addf(&oldref, "refs/heads/%s", oldname);
-
-       if (check_ref_format(oldref.buf))
-               die("Invalid branch name: %s", oldref.buf);
-
-       strbuf_addf(&newref, "refs/heads/%s", newname);
+       if (strbuf_check_branch_ref(&oldref, oldname)) {
+               /*
+                * Bad name --- this could be an attempt to rename a
+                * ref that we used to allow to be created by accident.
+                */
+               if (resolve_ref(oldref.buf, sha1, 1, NULL))
+                       recovery = 1;
+               else
+                       die("Invalid branch name: '%s'", oldname);
+       }
 
-       if (check_ref_format(newref.buf))
-               die("Invalid branch name: %s", newref.buf);
+       if (strbuf_check_branch_ref(&newref, newname))
+               die("Invalid branch name: '%s'", newname);
 
        if (resolve_ref(newref.buf, sha1, 1, NULL) && !force)
-               die("A branch named '%s' already exists.", newname);
+               die("A branch named '%s' already exists.", newref.buf + 11);
 
        strbuf_addf(&logmsg, "Branch: renamed %s to %s",
                 oldref.buf, newref.buf);
@@ -452,6 +517,9 @@ static void rename_branch(const char *oldname, const char *newname, int force)
                die("Branch rename failed");
        strbuf_release(&logmsg);
 
+       if (recovery)
+               warning("Renamed a misnamed branch '%s' away", oldref.buf + 11);
+
        /* no need to pass logmsg here as HEAD didn't really move */
        if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
                die("Branch renamed to %s, but HEAD is not updated!", newname);
@@ -466,22 +534,6 @@ static void rename_branch(const char *oldname, const char *newname, int force)
        strbuf_release(&newsection);
 }
 
-static int opt_parse_with_commit(const struct option *opt, const char *arg, int unset)
-{
-       unsigned char sha1[20];
-       struct commit *commit;
-
-       if (!arg)
-               return -1;
-       if (get_sha1(arg, sha1))
-               die("malformed object name %s", arg);
-       commit = lookup_commit_reference(sha1);
-       if (!commit)
-               die("no such commit %s", arg);
-       commit_list_insert(commit, opt->value);
-       return 0;
-}
-
 static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
 {
        merge_filter = ((opt->long_name[0] == 'n')
@@ -508,7 +560,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
        struct option options[] = {
                OPT_GROUP("Generic options"),
                OPT__VERBOSE(&verbose),
-               OPT_SET_INT( 0 , "track",  &track, "set up tracking mode (see git-pull(1))",
+               OPT_SET_INT('t', "track",  &track, "set up tracking mode (see git-pull(1))",
                        BRANCH_TRACK_EXPLICIT),
                OPT_BOOLEAN( 0 , "color",  &branch_use_color, "use colored output"),
                OPT_SET_INT('r', NULL,     &kinds, "act on remote-tracking branches",
@@ -517,13 +569,13 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
                        OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
                        "print only branches that contain the commit",
                        PARSE_OPT_LASTARG_DEFAULT,
-                       opt_parse_with_commit, (intptr_t)"HEAD",
+                       parse_opt_with_commit, (intptr_t)"HEAD",
                },
                {
                        OPTION_CALLBACK, 0, "with", &with_commit, "commit",
                        "print only branches that contain the commit",
                        PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
-                       opt_parse_with_commit, (intptr_t) "HEAD",
+                       parse_opt_with_commit, (intptr_t) "HEAD",
                },
                OPT__ABBREV(&abbrev),
 
@@ -535,7 +587,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
                OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1),
                OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
                OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"),
-               OPT_BOOLEAN('f', NULL, &force_create, "force creation (when already exists)"),
+               OPT_BOOLEAN('f', "force", &force_create, "force creation (when already exists)"),
                {
                        OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
                        "commit", "print only not merged branches",
@@ -571,7 +623,8 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
        }
        hashcpy(merge_filter_ref, head_sha1);
 
-       argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
+       argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
+                            0);
        if (!!delete + !!rename + !!force_create > 1)
                usage_with_options(builtin_branch_usage, options);