git-daemon: rewrite kindergarden, new option --max-connections
[gitweb.git] / builtin-branch.c
index 9edf2eb8162eb7214e1b4d76dca8949c63e72847..b1a2ad7a6b3b150cda8d031a87352a4daedc40ea 100644 (file)
 #include "builtin.h"
 #include "remote.h"
 #include "parse-options.h"
+#include "branch.h"
+#include "diff.h"
+#include "revision.h"
 
 static const char * const builtin_branch_usage[] = {
-       "git-branch [options] [-r | -a]",
-       "git-branch [options] [-l] [-f] <branchname> [<start-point>]",
-       "git-branch [options] [-r] (-d | -D) <branchname>",
-       "git-branch [options] (-m | -M) [<oldbranch>] <newbranch>",
+       "git branch [options] [-r | -a] [--merged | --no-merged]",
+       "git branch [options] [-l] [-f] <branchname> [<start-point>]",
+       "git branch [options] [-r] (-d | -D) <branchname>",
+       "git branch [options] (-m | -M) [<oldbranch>] <newbranch>",
        NULL
 };
 
-#define REF_UNKNOWN_TYPE    0x00
 #define REF_LOCAL_BRANCH    0x01
 #define REF_REMOTE_BRANCH   0x02
-#define REF_TAG             0x04
 
 static const char *head;
 static unsigned char head_sha1[20];
 
-static int branch_track = 1;
-
 static int branch_use_color = -1;
 static char branch_colors[][COLOR_MAXLEN] = {
        "\033[m",       /* reset */
@@ -47,6 +46,13 @@ enum color_branch {
        COLOR_BRANCH_CURRENT = 4,
 };
 
+static enum merge_filter {
+       NO_FILTER = 0,
+       SHOW_NOT_MERGED,
+       SHOW_MERGED,
+} merge_filter;
+static unsigned char merge_filter_ref[20];
+
 static int parse_branch_color_slot(const char *var, int ofs)
 {
        if (!strcasecmp(var+ofs, "plain"))
@@ -62,7 +68,7 @@ static int parse_branch_color_slot(const char *var, int ofs)
        die("bad config variable '%s'", var);
 }
 
-static int git_branch_config(const char *var, const char *value)
+static int git_branch_config(const char *var, const char *value, void *cb)
 {
        if (!strcmp(var, "color.branch")) {
                branch_use_color = git_config_colorbool(var, value, -1);
@@ -75,11 +81,7 @@ static int git_branch_config(const char *var, const char *value)
                color_parse(value, var, branch_colors[slot]);
                return 0;
        }
-       if (!strcmp(var, "branch.autosetupmerge")) {
-               branch_track = git_config_bool(var, value);
-               return 0;
-       }
-       return git_color_default_config(var, value);
+       return git_color_default_config(var, value, cb);
 }
 
 static const char *branch_get_color(enum color_branch ix)
@@ -126,8 +128,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
                        continue;
                }
 
-               if (name)
-                       free(name);
+               free(name);
 
                name = xstrdup(mkpath(fmt, argv[i]));
                if (!resolve_ref(name, sha1, 1, NULL)) {
@@ -172,8 +173,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
                }
        }
 
-       if (name)
-               free(name);
+       free(name);
 
        return(ret);
 }
@@ -181,25 +181,21 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
 struct ref_item {
        char *name;
        unsigned int kind;
-       unsigned char sha1[20];
+       struct commit *commit;
 };
 
 struct ref_list {
+       struct rev_info revs;
        int index, alloc, maxwidth;
        struct ref_item *list;
        struct commit_list *with_commit;
        int kinds;
 };
 
-static int has_commit(const unsigned char *sha1, struct commit_list *with_commit)
+static int has_commit(struct commit *commit, struct commit_list *with_commit)
 {
-       struct commit *commit;
-
        if (!with_commit)
                return 1;
-       commit = lookup_commit_reference_gently(sha1, 1);
-       if (!commit)
-               return 0;
        while (with_commit) {
                struct commit *other;
 
@@ -215,7 +211,8 @@ 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;
-       int kind = REF_UNKNOWN_TYPE;
+       struct commit *commit;
+       int kind;
        int len;
 
        /* Detect kind */
@@ -225,19 +222,25 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags,
        } else if (!prefixcmp(refname, "refs/remotes/")) {
                kind = REF_REMOTE_BRANCH;
                refname += 13;
-       } else if (!prefixcmp(refname, "refs/tags/")) {
-               kind = REF_TAG;
-               refname += 10;
-       }
+       } 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(sha1, ref_list->with_commit))
+       if (!has_commit(commit, ref_list->with_commit))
                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);
+
        /* Resize buffer */
        if (ref_list->index >= ref_list->alloc) {
                ref_list->alloc = alloc_nr(ref_list->alloc);
@@ -249,7 +252,7 @@ static int append_ref(const char *refname, const unsigned char *sha1, int flags,
        newitem = &(ref_list->list[ref_list->index++]);
        newitem->name = xstrdup(refname);
        newitem->kind = kind;
-       hashcpy(newitem->sha1, sha1);
+       newitem->commit = commit;
        len = strlen(newitem->name);
        if (len > ref_list->maxwidth)
                ref_list->maxwidth = len;
@@ -276,12 +279,41 @@ static int ref_cmp(const void *r1, const void *r2)
        return strcmp(c1->name, c2->name);
 }
 
+static void fill_tracking_info(char *stat, const char *branch_name)
+{
+       int ours, theirs;
+       struct branch *branch = branch_get(branch_name);
+
+       if (!stat_tracking_info(branch, &ours, &theirs) || (!ours && !theirs))
+               return;
+       if (!ours)
+               sprintf(stat, "[behind %d] ", theirs);
+       else if (!theirs)
+               sprintf(stat, "[ahead %d] ", ours);
+       else
+               sprintf(stat, "[ahead %d, behind %d] ", ours, theirs);
+}
+
+static int matches_merge_filter(struct commit *commit)
+{
+       int is_merged;
+
+       if (merge_filter == NO_FILTER)
+               return 1;
+
+       is_merged = !!(commit->object.flags & UNINTERESTING);
+       return (is_merged == (merge_filter == SHOW_MERGED));
+}
+
 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
                           int abbrev, int current)
 {
        char c;
        int color;
-       struct commit *commit;
+       struct commit *commit = item->commit;
+
+       if (!matches_merge_filter(commit))
+               return;
 
        switch (item->kind) {
        case REF_LOCAL_BRANCH:
@@ -304,19 +336,26 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
        if (verbose) {
                struct strbuf subject;
                const char *sub = " **** invalid ref ****";
+               char stat[128];
 
                strbuf_init(&subject, 0);
+               stat[0] = '\0';
 
-               commit = lookup_commit(item->sha1);
+               commit = item->commit;
                if (commit && !parse_commit(commit)) {
                        pretty_print_commit(CMIT_FMT_ONELINE, commit,
                                            &subject, 0, NULL, NULL, 0, 0);
                        sub = subject.buf;
                }
-               printf("%c %s%-*s%s %s %s\n", c, branch_get_color(color),
+
+               if (item->kind == REF_LOCAL_BRANCH)
+                       fill_tracking_info(stat, item->name);
+
+               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->sha1, abbrev), sub);
+                      find_unique_abbrev(item->commit->object.sha1, abbrev),
+                      stat, sub);
                strbuf_release(&subject);
        } else {
                printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
@@ -324,26 +363,53 @@ static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
        }
 }
 
+static int calc_maxwidth(struct ref_list *refs)
+{
+       int i, l, 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;
+       }
+       return w;
+}
+
 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.with_commit = with_commit;
+       if (merge_filter != NO_FILTER)
+               init_revisions(&ref_list.revs, NULL);
        for_each_ref(append_ref, &ref_list);
+       if (merge_filter != NO_FILTER) {
+               struct commit *filter;
+               filter = lookup_commit_reference_gently(merge_filter_ref, 0);
+               filter->object.flags |= UNINTERESTING;
+               add_pending_object(&ref_list.revs,
+                                  (struct object *) filter, "");
+               ref_list.revs.limited = 1;
+               prepare_revision_walk(&ref_list.revs);
+               if (verbose)
+                       ref_list.maxwidth = calc_maxwidth(&ref_list);
+       }
 
        qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 
        detached = (detached && (kinds & REF_LOCAL_BRANCH));
-       if (detached && has_commit(head_sha1, with_commit)) {
+       if (detached && head_commit && has_commit(head_commit, with_commit)) {
                struct ref_item item;
                item.name = xstrdup("(no branch)");
                item.kind = REF_LOCAL_BRANCH;
-               hashcpy(item.sha1, head_sha1);
+               item.commit = head_commit;
                if (strlen(item.name) > ref_list.maxwidth)
-                             ref_list.maxwidth = strlen(item.name);
+                       ref_list.maxwidth = strlen(item.name);
                print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
                free(item.name);
        }
@@ -359,141 +425,6 @@ static void print_ref_list(int kinds, int detached, int verbose, int abbrev, str
        free_ref_list(&ref_list);
 }
 
-struct tracking {
-       struct refspec spec;
-       char *src;
-       const char *remote;
-       int matches;
-};
-
-static int find_tracked_branch(struct remote *remote, void *priv)
-{
-       struct tracking *tracking = priv;
-
-       if (!remote_find_tracking(remote, &tracking->spec)) {
-               if (++tracking->matches == 1) {
-                       tracking->src = tracking->spec.src;
-                       tracking->remote = remote->name;
-               } else {
-                       free(tracking->spec.src);
-                       if (tracking->src) {
-                               free(tracking->src);
-                               tracking->src = NULL;
-                       }
-               }
-               tracking->spec.src = NULL;
-       }
-
-       return 0;
-}
-
-
-/*
- * This is called when new_ref is branched off of orig_ref, and tries
- * to infer the settings for branch.<new_ref>.{remote,merge} from the
- * config.
- */
-static int setup_tracking(const char *new_ref, const char *orig_ref)
-{
-       char key[1024];
-       struct tracking tracking;
-
-       if (strlen(new_ref) > 1024 - 7 - 7 - 1)
-               return error("Tracking not set up: name too long: %s",
-                               new_ref);
-
-       memset(&tracking, 0, sizeof(tracking));
-       tracking.spec.dst = (char *)orig_ref;
-       if (for_each_remote(find_tracked_branch, &tracking) ||
-                       !tracking.matches)
-               return 1;
-
-       if (tracking.matches > 1)
-               return error("Not tracking: ambiguous information for ref %s",
-                               orig_ref);
-
-       if (tracking.matches == 1) {
-               sprintf(key, "branch.%s.remote", new_ref);
-               git_config_set(key, tracking.remote ?  tracking.remote : ".");
-               sprintf(key, "branch.%s.merge", new_ref);
-               git_config_set(key, tracking.src);
-               free(tracking.src);
-               printf("Branch %s set up to track remote branch %s.\n",
-                              new_ref, orig_ref);
-       }
-
-       return 0;
-}
-
-static void create_branch(const char *name, const char *start_name,
-                         int force, int reflog, int track)
-{
-       struct ref_lock *lock;
-       struct commit *commit;
-       unsigned char sha1[20];
-       char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20];
-       int forcing = 0;
-
-       snprintf(ref, sizeof ref, "refs/heads/%s", name);
-       if (check_ref_format(ref))
-               die("'%s' is not a valid branch name.", name);
-
-       if (resolve_ref(ref, sha1, 1, NULL)) {
-               if (!force)
-                       die("A branch named '%s' already exists.", name);
-               else if (!is_bare_repository() && !strcmp(head, name))
-                       die("Cannot force update the current branch.");
-               forcing = 1;
-       }
-
-       real_ref = NULL;
-       if (get_sha1(start_name, sha1))
-               die("Not a valid object name: '%s'.", start_name);
-
-       switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
-       case 0:
-               /* Not branching from any existing branch */
-               real_ref = NULL;
-               break;
-       case 1:
-               /* Unique completion -- good */
-               break;
-       default:
-               die("Ambiguous object name: '%s'.", start_name);
-               break;
-       }
-
-       if ((commit = lookup_commit_reference(sha1)) == NULL)
-               die("Not a valid branch point: '%s'.", start_name);
-       hashcpy(sha1, commit->object.sha1);
-
-       lock = lock_any_ref_for_update(ref, NULL, 0);
-       if (!lock)
-               die("Failed to lock ref for update: %s.", strerror(errno));
-
-       if (reflog)
-               log_all_ref_updates = 1;
-
-       if (forcing)
-               snprintf(msg, sizeof msg, "branch: Reset from %s",
-                        start_name);
-       else
-               snprintf(msg, sizeof msg, "branch: Created from %s",
-                        start_name);
-
-       /* When branching off a remote branch, set up so that git-pull
-          automatically merges from there.  So far, this is only done for
-          remotes registered via .git/config.  */
-       if (real_ref && track)
-               setup_tracking(name, real_ref);
-
-       if (write_ref_sha1(lock, sha1, msg) < 0)
-               die("Failed to write ref: %s.", strerror(errno));
-
-       if (real_ref)
-               free(real_ref);
-}
-
 static void rename_branch(const char *oldname, const char *newname, int force)
 {
        char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
@@ -550,28 +481,48 @@ static int opt_parse_with_commit(const struct option *opt, const char *arg, int
        return 0;
 }
 
+static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
+{
+       merge_filter = ((opt->long_name[0] == 'n')
+                       ? SHOW_NOT_MERGED
+                       : SHOW_MERGED);
+       if (unset)
+               merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
+       if (!arg)
+               arg = "HEAD";
+       if (get_sha1(arg, merge_filter_ref))
+               die("malformed object name %s", arg);
+       return 0;
+}
+
 int cmd_branch(int argc, const char **argv, const char *prefix)
 {
        int delete = 0, rename = 0, force_create = 0;
        int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
-       int reflog = 0, track;
+       int reflog = 0;
+       enum branch_track track;
        int kinds = REF_LOCAL_BRANCH;
        struct commit_list *with_commit = NULL;
 
        struct option options[] = {
                OPT_GROUP("Generic options"),
                OPT__VERBOSE(&verbose),
-               OPT_BOOLEAN( 0 , "track",  &track, "set up tracking mode (see git-pull(1))"),
+               OPT_SET_INT( 0 , "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",
                        REF_REMOTE_BRANCH),
-               OPT_CALLBACK(0, "contains", &with_commit, "commit",
-                            "print only branches that contain the commit",
-                            opt_parse_with_commit),
+               {
+                       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",
+               },
                {
                        OPTION_CALLBACK, 0, "with", &with_commit, "commit",
                        "print only branches that contain the commit",
-                       PARSE_OPT_HIDDEN, opt_parse_with_commit,
+                       PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
+                       opt_parse_with_commit, (intptr_t) "HEAD",
                },
                OPT__ABBREV(&abbrev),
 
@@ -584,18 +535,27 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
                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)"),
+               {
+                       OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
+                       "commit", "print only not merged branches",
+                       PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
+                       opt_parse_merge_filter, (intptr_t) "HEAD",
+               },
+               {
+                       OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
+                       "commit", "print only merged branches",
+                       PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
+                       opt_parse_merge_filter, (intptr_t) "HEAD",
+               },
                OPT_END(),
        };
 
-       git_config(git_branch_config);
+       git_config(git_branch_config, NULL);
 
        if (branch_use_color == -1)
                branch_use_color = git_use_color_default;
 
-       track = branch_track;
-       argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
-       if (!!delete + !!rename + !!force_create > 1)
-               usage_with_options(builtin_branch_usage, options);
+       track = git_branch_track;
 
        head = resolve_ref("HEAD", head_sha1, 0, NULL);
        if (!head)
@@ -608,6 +568,11 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
                        die("HEAD not found below refs/heads!");
                head += 11;
        }
+       hashcpy(merge_filter_ref, head_sha1);
+
+       argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
+       if (!!delete + !!rename + !!force_create > 1)
+               usage_with_options(builtin_branch_usage, options);
 
        if (delete)
                return delete_branches(argc, argv, delete > 1, kinds);
@@ -618,7 +583,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
        else if (rename && (argc == 2))
                rename_branch(argv[0], argv[1], rename > 1);
        else if (argc <= 2)
-               create_branch(argv[0], (argc == 2) ? argv[1] : head,
+               create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
                              force_create, reflog, track);
        else
                usage_with_options(builtin_branch_usage, options);