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![Junio C Hamano](/assets/img/avatar_default.png)
This is to resolve conflicts early in preparation for possible inclusion of "reflog on detached HEAD" series by Nico, as having it in 1.5.0 would really help us remove confusion between detached and attached states. Signed-off-by: Junio C Hamano <junkio@cox.net>
501 lines
12 KiB
C
501 lines
12 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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static const char builtin_branch_usage[] =
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"git-branch [-r] (-d | -D) <branchname> | [-l] [-f] <branchname> [<start-point>] | (-m | -M) [<oldbranch>] <newbranch> | [--color | --no-color] [-r | -a] [-v [--abbrev=<length>]]";
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#define REF_UNKNOWN_TYPE 0x00
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#define REF_LOCAL_BRANCH 0x01
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#define REF_REMOTE_BRANCH 0x02
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#define REF_TAG 0x04
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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;
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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 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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int git_branch_config(const char *var, const char *value)
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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);
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return 0;
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}
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if (!strncmp(var, "color.branch.", 13)) {
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int slot = parse_branch_color_slot(var, 13);
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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_default_config(var, value);
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}
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const char *branch_get_color(enum color_branch ix)
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{
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if (branch_use_color)
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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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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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if (name)
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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)) {
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error("The branch '%s' is not a strict subset 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)) {
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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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}
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if (name)
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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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unsigned char sha1[20];
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};
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struct ref_list {
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int index, alloc, maxwidth;
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struct ref_item *list;
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int kinds;
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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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int kind = REF_UNKNOWN_TYPE;
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int len;
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/* Detect kind */
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if (!strncmp(refname, "refs/heads/", 11)) {
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kind = REF_LOCAL_BRANCH;
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refname += 11;
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} else if (!strncmp(refname, "refs/remotes/", 13)) {
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kind = REF_REMOTE_BRANCH;
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refname += 13;
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} else if (!strncmp(refname, "refs/tags/", 10)) {
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kind = REF_TAG;
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refname += 10;
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}
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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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/* 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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hashcpy(newitem->sha1, sha1);
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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 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;
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char subject[256];
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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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commit = lookup_commit(item->sha1);
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if (commit && !parse_commit(commit))
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pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
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subject, sizeof(subject), 0,
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NULL, NULL, 0);
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else
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strcpy(subject, " **** invalid ref ****");
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printf("%c %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->sha1, abbrev), 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 void print_ref_list(int kinds, int detached, int verbose, int abbrev)
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{
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int i;
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struct ref_list ref_list;
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memset(&ref_list, 0, sizeof(ref_list));
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ref_list.kinds = kinds;
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for_each_ref(append_ref, &ref_list);
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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) {
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struct ref_item item;
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item.name = "(no branch)";
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item.kind = REF_LOCAL_BRANCH;
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hashcpy(item.sha1, head_sha1);
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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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}
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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 create_branch(const char *name, const char *start_name,
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unsigned char *start_sha1,
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int force, int reflog)
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{
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struct ref_lock *lock;
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struct commit *commit;
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unsigned char sha1[20];
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char ref[PATH_MAX], msg[PATH_MAX + 20];
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int forcing = 0;
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snprintf(ref, sizeof ref, "refs/heads/%s", name);
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if (check_ref_format(ref))
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die("'%s' is not a valid branch name.", name);
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if (resolve_ref(ref, sha1, 1, NULL)) {
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if (!force)
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die("A branch named '%s' already exists.", name);
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else if (!is_bare_repository() && !strcmp(head, name))
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die("Cannot force update the current branch.");
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forcing = 1;
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}
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if (start_sha1)
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/* detached HEAD */
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hashcpy(sha1, start_sha1);
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else if (get_sha1(start_name, sha1))
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die("Not a valid object name: '%s'.", start_name);
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if ((commit = lookup_commit_reference(sha1)) == NULL)
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die("Not a valid branch point: '%s'.", start_name);
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hashcpy(sha1, commit->object.sha1);
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lock = lock_any_ref_for_update(ref, NULL);
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if (!lock)
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die("Failed to lock ref for update: %s.", strerror(errno));
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if (reflog)
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log_all_ref_updates = 1;
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if (forcing)
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snprintf(msg, sizeof msg, "branch: Reset from %s",
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start_name);
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else
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snprintf(msg, sizeof msg, "branch: Created from %s",
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start_name);
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if (write_ref_sha1(lock, sha1, msg) < 0)
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die("Failed to write ref: %s.", strerror(errno));
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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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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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}
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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, force_delete = 0, force_create = 0;
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int rename = 0, force_rename = 0;
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int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
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int reflog = 0;
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int kinds = REF_LOCAL_BRANCH;
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int i;
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git_config(git_branch_config);
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (arg[0] != '-')
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break;
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if (!strcmp(arg, "--")) {
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i++;
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break;
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}
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if (!strcmp(arg, "-d")) {
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delete = 1;
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continue;
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}
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if (!strcmp(arg, "-D")) {
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delete = 1;
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force_delete = 1;
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continue;
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}
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if (!strcmp(arg, "-f")) {
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force_create = 1;
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continue;
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}
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if (!strcmp(arg, "-m")) {
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rename = 1;
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continue;
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}
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if (!strcmp(arg, "-M")) {
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rename = 1;
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force_rename = 1;
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continue;
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}
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if (!strcmp(arg, "-r")) {
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kinds = REF_REMOTE_BRANCH;
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continue;
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}
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if (!strcmp(arg, "-a")) {
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kinds = REF_REMOTE_BRANCH | REF_LOCAL_BRANCH;
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continue;
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}
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if (!strcmp(arg, "-l")) {
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reflog = 1;
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continue;
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}
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if (!strncmp(arg, "--abbrev=", 9)) {
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abbrev = atoi(arg+9);
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continue;
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}
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if (!strcmp(arg, "-v")) {
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verbose = 1;
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continue;
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}
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if (!strcmp(arg, "--color")) {
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branch_use_color = 1;
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continue;
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}
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if (!strcmp(arg, "--no-color")) {
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branch_use_color = 0;
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continue;
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}
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usage(builtin_branch_usage);
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}
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if ((delete && rename) || (delete && force_create) ||
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(rename && force_create))
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usage(builtin_branch_usage);
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head = xstrdup(resolve_ref("HEAD", head_sha1, 0, NULL));
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if (!head)
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die("Failed to resolve HEAD as a valid ref.");
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if (!strcmp(head, "HEAD")) {
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detached = 1;
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}
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else {
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if (strncmp(head, "refs/heads/", 11))
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die("HEAD not found below refs/heads!");
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head += 11;
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}
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if (delete)
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return delete_branches(argc - i, argv + i, force_delete, kinds);
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else if (i == argc)
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print_ref_list(kinds, detached, verbose, abbrev);
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else if (rename && (i == argc - 1))
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rename_branch(head, argv[i], force_rename);
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else if (rename && (i == argc - 2))
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rename_branch(argv[i], argv[i + 1], force_rename);
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else if (i == argc - 1)
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create_branch(argv[i], head, head_sha1, force_create, reflog);
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else if (i == argc - 2)
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create_branch(argv[i], argv[i+1], NULL, force_create, reflog);
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else
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usage(builtin_branch_usage);
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return 0;
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}
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