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https://github.com/git/git
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![Miklos Vajna](/assets/img/avatar_default.png)
This had two problems with symrefs. First, it copied the actual sha1 instead of the "pointer", second it failed to remove the old ref after a successful rename. Given that till now delete_ref() always dereferenced symrefs, a new parameters has been introduced to delete_ref() to allow deleting refs without a dereference. Signed-off-by: Miklos Vajna <vmiklos@frugalware.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
593 lines
15 KiB
C
593 lines
15 KiB
C
/*
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* Builtin "git branch"
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*
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* Copyright (c) 2006 Kristian Høgsberg <krh@redhat.com>
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* Based on git-branch.sh by Junio C Hamano.
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*/
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#include "cache.h"
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#include "color.h"
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#include "refs.h"
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#include "commit.h"
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#include "builtin.h"
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#include "remote.h"
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#include "parse-options.h"
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#include "branch.h"
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#include "diff.h"
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#include "revision.h"
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static const char * const builtin_branch_usage[] = {
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"git branch [options] [-r | -a] [--merged | --no-merged]",
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"git branch [options] [-l] [-f] <branchname> [<start-point>]",
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"git branch [options] [-r] (-d | -D) <branchname>",
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"git branch [options] (-m | -M) [<oldbranch>] <newbranch>",
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NULL
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};
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#define REF_LOCAL_BRANCH 0x01
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#define REF_REMOTE_BRANCH 0x02
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static const char *head;
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static unsigned char head_sha1[20];
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static int branch_use_color = -1;
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static char branch_colors[][COLOR_MAXLEN] = {
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"\033[m", /* reset */
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"", /* PLAIN (normal) */
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"\033[31m", /* REMOTE (red) */
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"", /* LOCAL (normal) */
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"\033[32m", /* CURRENT (green) */
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};
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enum color_branch {
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COLOR_BRANCH_RESET = 0,
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COLOR_BRANCH_PLAIN = 1,
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COLOR_BRANCH_REMOTE = 2,
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COLOR_BRANCH_LOCAL = 3,
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COLOR_BRANCH_CURRENT = 4,
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};
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static enum merge_filter {
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NO_FILTER = 0,
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SHOW_NOT_MERGED,
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SHOW_MERGED,
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} merge_filter;
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static unsigned char merge_filter_ref[20];
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static int parse_branch_color_slot(const char *var, int ofs)
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{
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if (!strcasecmp(var+ofs, "plain"))
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return COLOR_BRANCH_PLAIN;
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if (!strcasecmp(var+ofs, "reset"))
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return COLOR_BRANCH_RESET;
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if (!strcasecmp(var+ofs, "remote"))
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return COLOR_BRANCH_REMOTE;
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if (!strcasecmp(var+ofs, "local"))
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return COLOR_BRANCH_LOCAL;
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if (!strcasecmp(var+ofs, "current"))
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return COLOR_BRANCH_CURRENT;
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die("bad config variable '%s'", var);
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}
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static int git_branch_config(const char *var, const char *value, void *cb)
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{
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if (!strcmp(var, "color.branch")) {
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branch_use_color = git_config_colorbool(var, value, -1);
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return 0;
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}
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if (!prefixcmp(var, "color.branch.")) {
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int slot = parse_branch_color_slot(var, 13);
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if (!value)
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return config_error_nonbool(var);
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color_parse(value, var, branch_colors[slot]);
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return 0;
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}
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return git_color_default_config(var, value, cb);
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}
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static const char *branch_get_color(enum color_branch ix)
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{
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if (branch_use_color > 0)
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return branch_colors[ix];
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return "";
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}
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static int delete_branches(int argc, const char **argv, int force, int kinds)
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{
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struct commit *rev, *head_rev = head_rev;
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unsigned char sha1[20];
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char *name = NULL;
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const char *fmt, *remote;
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char section[PATH_MAX];
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int i;
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int ret = 0;
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switch (kinds) {
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case REF_REMOTE_BRANCH:
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fmt = "refs/remotes/%s";
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remote = "remote ";
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force = 1;
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break;
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case REF_LOCAL_BRANCH:
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fmt = "refs/heads/%s";
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remote = "";
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break;
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default:
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die("cannot use -a with -d");
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}
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if (!force) {
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head_rev = lookup_commit_reference(head_sha1);
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if (!head_rev)
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die("Couldn't look up commit object for HEAD");
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}
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for (i = 0; i < argc; i++) {
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if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) {
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error("Cannot delete the branch '%s' "
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"which you are currently on.", argv[i]);
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ret = 1;
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continue;
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}
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free(name);
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name = xstrdup(mkpath(fmt, argv[i]));
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if (!resolve_ref(name, sha1, 1, NULL)) {
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error("%sbranch '%s' not found.",
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remote, argv[i]);
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ret = 1;
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continue;
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}
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rev = lookup_commit_reference(sha1);
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if (!rev) {
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error("Couldn't look up commit object for '%s'", name);
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ret = 1;
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continue;
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}
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/* This checks whether the merge bases of branch and
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* HEAD contains branch -- which means that the HEAD
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* contains everything in both.
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*/
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if (!force &&
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!in_merge_bases(rev, &head_rev, 1)) {
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error("The branch '%s' is not an ancestor of "
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"your current HEAD.\n"
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"If you are sure you want to delete it, "
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"run 'git branch -D %s'.", argv[i], argv[i]);
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ret = 1;
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continue;
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}
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if (delete_ref(name, sha1, 0)) {
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error("Error deleting %sbranch '%s'", remote,
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argv[i]);
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ret = 1;
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} else {
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printf("Deleted %sbranch %s.\n", remote, argv[i]);
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snprintf(section, sizeof(section), "branch.%s",
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argv[i]);
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if (git_config_rename_section(section, NULL) < 0)
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warning("Update of config-file failed");
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}
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}
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free(name);
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return(ret);
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}
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struct ref_item {
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char *name;
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unsigned int kind;
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struct commit *commit;
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};
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struct ref_list {
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struct rev_info revs;
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int index, alloc, maxwidth;
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struct ref_item *list;
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struct commit_list *with_commit;
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int kinds;
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};
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static int has_commit(struct commit *commit, struct commit_list *with_commit)
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{
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if (!with_commit)
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return 1;
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while (with_commit) {
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struct commit *other;
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other = with_commit->item;
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with_commit = with_commit->next;
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if (in_merge_bases(other, &commit, 1))
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return 1;
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}
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return 0;
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}
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static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
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{
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struct ref_list *ref_list = (struct ref_list*)(cb_data);
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struct ref_item *newitem;
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struct commit *commit;
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int kind;
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int len;
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/* Detect kind */
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if (!prefixcmp(refname, "refs/heads/")) {
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kind = REF_LOCAL_BRANCH;
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refname += 11;
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} else if (!prefixcmp(refname, "refs/remotes/")) {
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kind = REF_REMOTE_BRANCH;
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refname += 13;
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} else
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return 0;
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commit = lookup_commit_reference_gently(sha1, 1);
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if (!commit)
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return error("branch '%s' does not point at a commit", refname);
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/* Filter with with_commit if specified */
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if (!has_commit(commit, ref_list->with_commit))
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return 0;
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/* Don't add types the caller doesn't want */
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if ((kind & ref_list->kinds) == 0)
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return 0;
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if (merge_filter != NO_FILTER)
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add_pending_object(&ref_list->revs,
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(struct object *)commit, refname);
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/* Resize buffer */
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if (ref_list->index >= ref_list->alloc) {
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ref_list->alloc = alloc_nr(ref_list->alloc);
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ref_list->list = xrealloc(ref_list->list,
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ref_list->alloc * sizeof(struct ref_item));
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}
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/* Record the new item */
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newitem = &(ref_list->list[ref_list->index++]);
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newitem->name = xstrdup(refname);
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newitem->kind = kind;
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newitem->commit = commit;
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len = strlen(newitem->name);
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if (len > ref_list->maxwidth)
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ref_list->maxwidth = len;
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return 0;
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}
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static void free_ref_list(struct ref_list *ref_list)
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{
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int i;
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for (i = 0; i < ref_list->index; i++)
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free(ref_list->list[i].name);
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free(ref_list->list);
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}
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static int ref_cmp(const void *r1, const void *r2)
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{
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struct ref_item *c1 = (struct ref_item *)(r1);
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struct ref_item *c2 = (struct ref_item *)(r2);
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if (c1->kind != c2->kind)
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return c1->kind - c2->kind;
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return strcmp(c1->name, c2->name);
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}
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static void fill_tracking_info(char *stat, const char *branch_name)
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{
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int ours, theirs;
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struct branch *branch = branch_get(branch_name);
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if (!stat_tracking_info(branch, &ours, &theirs) || (!ours && !theirs))
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return;
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if (!ours)
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sprintf(stat, "[behind %d] ", theirs);
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else if (!theirs)
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sprintf(stat, "[ahead %d] ", ours);
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else
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sprintf(stat, "[ahead %d, behind %d] ", ours, theirs);
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}
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static int matches_merge_filter(struct commit *commit)
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{
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int is_merged;
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if (merge_filter == NO_FILTER)
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return 1;
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is_merged = !!(commit->object.flags & UNINTERESTING);
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return (is_merged == (merge_filter == SHOW_MERGED));
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}
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static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
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int abbrev, int current)
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{
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char c;
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int color;
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struct commit *commit = item->commit;
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if (!matches_merge_filter(commit))
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return;
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switch (item->kind) {
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case REF_LOCAL_BRANCH:
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color = COLOR_BRANCH_LOCAL;
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break;
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case REF_REMOTE_BRANCH:
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color = COLOR_BRANCH_REMOTE;
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break;
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default:
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color = COLOR_BRANCH_PLAIN;
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break;
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}
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c = ' ';
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if (current) {
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c = '*';
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color = COLOR_BRANCH_CURRENT;
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}
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if (verbose) {
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struct strbuf subject;
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const char *sub = " **** invalid ref ****";
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char stat[128];
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strbuf_init(&subject, 0);
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stat[0] = '\0';
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commit = item->commit;
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if (commit && !parse_commit(commit)) {
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pretty_print_commit(CMIT_FMT_ONELINE, commit,
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&subject, 0, NULL, NULL, 0, 0);
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sub = subject.buf;
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}
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if (item->kind == REF_LOCAL_BRANCH)
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fill_tracking_info(stat, item->name);
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printf("%c %s%-*s%s %s %s%s\n", c, branch_get_color(color),
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maxwidth, item->name,
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branch_get_color(COLOR_BRANCH_RESET),
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find_unique_abbrev(item->commit->object.sha1, abbrev),
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stat, sub);
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strbuf_release(&subject);
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} else {
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printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
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branch_get_color(COLOR_BRANCH_RESET));
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}
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}
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static int calc_maxwidth(struct ref_list *refs)
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{
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int i, l, w = 0;
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for (i = 0; i < refs->index; i++) {
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if (!matches_merge_filter(refs->list[i].commit))
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continue;
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l = strlen(refs->list[i].name);
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if (l > w)
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w = l;
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}
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return w;
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}
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static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
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{
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int i;
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struct ref_list ref_list;
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struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
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memset(&ref_list, 0, sizeof(ref_list));
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ref_list.kinds = kinds;
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ref_list.with_commit = with_commit;
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if (merge_filter != NO_FILTER)
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init_revisions(&ref_list.revs, NULL);
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for_each_ref(append_ref, &ref_list);
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if (merge_filter != NO_FILTER) {
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struct commit *filter;
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filter = lookup_commit_reference_gently(merge_filter_ref, 0);
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filter->object.flags |= UNINTERESTING;
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add_pending_object(&ref_list.revs,
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(struct object *) filter, "");
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ref_list.revs.limited = 1;
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prepare_revision_walk(&ref_list.revs);
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if (verbose)
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ref_list.maxwidth = calc_maxwidth(&ref_list);
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}
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qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
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detached = (detached && (kinds & REF_LOCAL_BRANCH));
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if (detached && head_commit && has_commit(head_commit, with_commit)) {
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struct ref_item item;
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item.name = xstrdup("(no branch)");
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item.kind = REF_LOCAL_BRANCH;
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item.commit = head_commit;
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if (strlen(item.name) > ref_list.maxwidth)
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ref_list.maxwidth = strlen(item.name);
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print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
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free(item.name);
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}
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for (i = 0; i < ref_list.index; i++) {
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int current = !detached &&
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(ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
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!strcmp(ref_list.list[i].name, head);
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print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
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abbrev, current);
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}
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free_ref_list(&ref_list);
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}
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static void rename_branch(const char *oldname, const char *newname, int force)
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{
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char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
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unsigned char sha1[20];
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char oldsection[PATH_MAX], newsection[PATH_MAX];
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if (!oldname)
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die("cannot rename the current branch while not on any.");
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if (snprintf(oldref, sizeof(oldref), "refs/heads/%s", oldname) > sizeof(oldref))
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die("Old branchname too long");
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if (check_ref_format(oldref))
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die("Invalid branch name: %s", oldref);
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if (snprintf(newref, sizeof(newref), "refs/heads/%s", newname) > sizeof(newref))
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die("New branchname too long");
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if (check_ref_format(newref))
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die("Invalid branch name: %s", newref);
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if (resolve_ref(newref, sha1, 1, NULL) && !force)
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die("A branch named '%s' already exists.", newname);
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snprintf(logmsg, sizeof(logmsg), "Branch: renamed %s to %s",
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oldref, newref);
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if (rename_ref(oldref, newref, logmsg))
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die("Branch rename failed");
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/* no need to pass logmsg here as HEAD didn't really move */
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if (!strcmp(oldname, head) && create_symref("HEAD", newref, NULL))
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die("Branch renamed to %s, but HEAD is not updated!", newname);
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snprintf(oldsection, sizeof(oldsection), "branch.%s", oldref + 11);
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snprintf(newsection, sizeof(newsection), "branch.%s", newref + 11);
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if (git_config_rename_section(oldsection, newsection) < 0)
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die("Branch is renamed, but update of config-file failed");
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}
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static int opt_parse_with_commit(const struct option *opt, const char *arg, int unset)
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{
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unsigned char sha1[20];
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struct commit *commit;
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if (!arg)
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return -1;
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if (get_sha1(arg, sha1))
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die("malformed object name %s", arg);
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commit = lookup_commit_reference(sha1);
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if (!commit)
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die("no such commit %s", arg);
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commit_list_insert(commit, opt->value);
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return 0;
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}
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static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
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{
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merge_filter = ((opt->long_name[0] == 'n')
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? SHOW_NOT_MERGED
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: SHOW_MERGED);
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if (unset)
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merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
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if (!arg)
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arg = "HEAD";
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if (get_sha1(arg, merge_filter_ref))
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die("malformed object name %s", arg);
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return 0;
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}
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int cmd_branch(int argc, const char **argv, const char *prefix)
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{
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int delete = 0, rename = 0, force_create = 0;
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int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
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int reflog = 0;
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enum branch_track track;
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int kinds = REF_LOCAL_BRANCH;
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struct commit_list *with_commit = NULL;
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struct option options[] = {
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OPT_GROUP("Generic options"),
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OPT__VERBOSE(&verbose),
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OPT_SET_INT( 0 , "track", &track, "set up tracking mode (see git-pull(1))",
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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),
|
|
{
|
|
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 | PARSE_OPT_LASTARG_DEFAULT,
|
|
opt_parse_with_commit, (intptr_t) "HEAD",
|
|
},
|
|
OPT__ABBREV(&abbrev),
|
|
|
|
OPT_GROUP("Specific git-branch actions:"),
|
|
OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches",
|
|
REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
|
|
OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1),
|
|
OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
|
|
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)"),
|
|
{
|
|
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, NULL);
|
|
|
|
if (branch_use_color == -1)
|
|
branch_use_color = git_use_color_default;
|
|
|
|
track = git_branch_track;
|
|
|
|
head = resolve_ref("HEAD", head_sha1, 0, NULL);
|
|
if (!head)
|
|
die("Failed to resolve HEAD as a valid ref.");
|
|
head = xstrdup(head);
|
|
if (!strcmp(head, "HEAD")) {
|
|
detached = 1;
|
|
} else {
|
|
if (prefixcmp(head, "refs/heads/"))
|
|
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);
|
|
else if (argc == 0)
|
|
print_ref_list(kinds, detached, verbose, abbrev, with_commit);
|
|
else if (rename && (argc == 1))
|
|
rename_branch(head, argv[0], rename > 1);
|
|
else if (rename && (argc == 2))
|
|
rename_branch(argv[0], argv[1], rename > 1);
|
|
else if (argc <= 2)
|
|
create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
|
|
force_create, reflog, track);
|
|
else
|
|
usage_with_options(builtin_branch_usage, options);
|
|
|
|
return 0;
|
|
}
|