Make git-branch a builtin
This replaces git-branch.sh with builtin-branch.c The changes is basically a patch from Kristian Hgsberg, updated to apply onto current 'next' Signed-off-by: Lars Hjemli <hjemli@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Lars Hjemli
Junio C Hamano
parent
3b463c3f02
commit
c31820c26b
3
Makefile
3
Makefile
@ -156,7 +156,7 @@ BASIC_CFLAGS =
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BASIC_LDFLAGS =
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SCRIPT_SH = \
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git-bisect.sh git-branch.sh git-checkout.sh \
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git-bisect.sh git-checkout.sh \
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git-cherry.sh git-clean.sh git-clone.sh git-commit.sh \
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git-fetch.sh \
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git-ls-remote.sh \
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@ -267,6 +267,7 @@ BUILTIN_OBJS = \
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builtin-add.o \
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builtin-apply.o \
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builtin-archive.o \
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builtin-branch.o \
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builtin-cat-file.o \
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builtin-checkout-index.o \
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builtin-check-ref-format.o \
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219
builtin-branch.c
Normal file
219
builtin-branch.c
Normal file
@ -0,0 +1,219 @@
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/*
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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 "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 (-d | -D) <branchname> | [-l] [-f] <branchname> [<start-point>] | [-r]";
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static const char *head;
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static unsigned char head_sha1[20];
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static int in_merge_bases(const unsigned char *sha1,
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struct commit *rev1,
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struct commit *rev2)
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{
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struct commit_list *bases, *b;
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int ret = 0;
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bases = get_merge_bases(rev1, rev2, 1);
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for (b = bases; b; b = b->next) {
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if (!hashcmp(sha1, b->item->object.sha1)) {
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ret = 1;
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break;
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}
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}
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free_commit_list(bases);
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return ret;
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}
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static void delete_branches(int argc, const char **argv, int force)
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{
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struct commit *rev, *head_rev;
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unsigned char sha1[20];
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char *name;
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int i;
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head_rev = lookup_commit_reference(head_sha1);
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for (i = 0; i < argc; i++) {
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if (!strcmp(head, argv[i]))
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die("Cannot delete the branch you are currently on.");
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name = xstrdup(mkpath("refs/heads/%s", argv[i]));
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if (!resolve_ref(name, sha1, 1, NULL))
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die("Branch '%s' not found.", argv[i]);
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rev = lookup_commit_reference(sha1);
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if (!rev || !head_rev)
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die("Couldn't look up commit objects.");
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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(sha1, rev, head_rev)) {
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fprintf(stderr,
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"The branch '%s' is not a strict subset of your current HEAD.\n"
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"If you are sure you want to delete it, run 'git branch -D %s'.\n",
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argv[i], argv[i]);
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exit(1);
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}
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if (delete_ref(name, sha1))
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printf("Error deleting branch '%s'\n", argv[i]);
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else
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printf("Deleted branch %s.\n", argv[i]);
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free(name);
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}
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}
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static int ref_index, ref_alloc;
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static char **ref_list;
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static int append_ref(const char *refname, const unsigned char *sha1, int flags,
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void *cb_data)
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{
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if (ref_index >= ref_alloc) {
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ref_alloc = alloc_nr(ref_alloc);
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ref_list = xrealloc(ref_list, ref_alloc * sizeof(char *));
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}
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ref_list[ref_index++] = xstrdup(refname);
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return 0;
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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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return strcmp(*(char **)r1, *(char **)r2);
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}
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static void print_ref_list(int remote_only)
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{
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int i;
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if (remote_only)
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for_each_remote_ref(append_ref, NULL);
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else
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for_each_branch_ref(append_ref, NULL);
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qsort(ref_list, ref_index, sizeof(char *), ref_cmp);
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for (i = 0; i < ref_index; i++) {
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if (!strcmp(ref_list[i], head))
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printf("* %s\n", ref_list[i]);
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else
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printf(" %s\n", ref_list[i]);
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}
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}
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static void create_branch(const char *name, const char *start,
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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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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 (!strcmp(head, name))
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die("Cannot force update the current branch.");
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}
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if (get_sha1(start, sha1) ||
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(commit = lookup_commit_reference(sha1)) == NULL)
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die("Not a valid branch point: '%s'.", start);
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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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snprintf(msg, sizeof msg, "branch: Created from %s", start);
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}
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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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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, remote_only = 0;
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int reflog = 0;
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int i;
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git_config(git_default_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, "-r")) {
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remote_only = 1;
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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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usage(builtin_branch_usage);
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}
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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 (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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if (delete)
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delete_branches(argc - i, argv + i, force_delete);
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else if (i == argc)
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print_ref_list(remote_only);
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else if (i == argc - 1)
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create_branch(argv[i], head, force_create, reflog);
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else if (i == argc - 2)
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create_branch(argv[i], argv[i + 1], 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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@ -15,6 +15,7 @@ extern int write_tree(unsigned char *sha1, int missing_ok, const char *prefix);
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extern int cmd_add(int argc, const char **argv, const char *prefix);
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extern int cmd_apply(int argc, const char **argv, const char *prefix);
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extern int cmd_archive(int argc, const char **argv, const char *prefix);
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extern int cmd_branch(int argc, const char **argv, const char *prefix);
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extern int cmd_cat_file(int argc, const char **argv, const char *prefix);
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extern int cmd_checkout_index(int argc, const char **argv, const char *prefix);
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extern int cmd_check_ref_format(int argc, const char **argv, const char *prefix);
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131
git-branch.sh
131
git-branch.sh
@ -1,131 +0,0 @@
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#!/bin/sh
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USAGE='[-l] [(-d | -D) <branchname>] | [[-f] <branchname> [<start-point>]] | -r'
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LONG_USAGE='If no arguments, show available branches and mark current branch with a star.
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If one argument, create a new branch <branchname> based off of current HEAD.
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If two arguments, create a new branch <branchname> based off of <start-point>.'
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SUBDIRECTORY_OK='Yes'
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. git-sh-setup
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headref=$(git-symbolic-ref HEAD | sed -e 's|^refs/heads/||')
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delete_branch () {
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option="$1"
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shift
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for branch_name
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do
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case ",$headref," in
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",$branch_name,")
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die "Cannot delete the branch you are on." ;;
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,,)
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die "What branch are you on anyway?" ;;
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esac
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branch=$(git-show-ref --verify --hash -- "refs/heads/$branch_name") &&
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branch=$(git-rev-parse --verify "$branch^0") ||
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die "Seriously, what branch are you talking about?"
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case "$option" in
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-D)
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;;
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*)
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mbs=$(git-merge-base -a "$branch" HEAD | tr '\012' ' ')
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case " $mbs " in
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*' '$branch' '*)
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# the merge base of branch and HEAD contains branch --
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# which means that the HEAD contains everything in both.
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;;
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*)
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echo >&2 "The branch '$branch_name' is not a strict subset of your current HEAD.
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If you are sure you want to delete it, run 'git branch -D $branch_name'."
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exit 1
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;;
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esac
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;;
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esac
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git update-ref -d "refs/heads/$branch_name" "$branch"
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echo "Deleted branch $branch_name."
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done
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exit 0
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}
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ls_remote_branches () {
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git-rev-parse --symbolic --all |
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sed -ne 's|^refs/\(remotes/\)|\1|p' |
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sort
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}
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force=
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create_log=
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while case "$#,$1" in 0,*) break ;; *,-*) ;; *) break ;; esac
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do
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case "$1" in
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-d | -D)
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delete_branch "$@"
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exit
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;;
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-r)
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ls_remote_branches
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exit
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;;
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-f)
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force="$1"
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;;
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-l)
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create_log="yes"
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;;
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--)
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shift
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break
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;;
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-*)
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usage
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;;
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esac
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shift
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done
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case "$#" in
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0)
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git-rev-parse --symbolic --branches |
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sort |
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while read ref
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do
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if test "$headref" = "$ref"
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then
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pfx='*'
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else
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pfx=' '
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fi
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echo "$pfx $ref"
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done
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exit 0 ;;
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1)
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head=HEAD ;;
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2)
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head="$2^0" ;;
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esac
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branchname="$1"
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rev=$(git-rev-parse --verify "$head") || exit
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git-check-ref-format "heads/$branchname" ||
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die "we do not like '$branchname' as a branch name."
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prev=''
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if git-show-ref --verify --quiet -- "refs/heads/$branchname"
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then
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if test '' = "$force"
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then
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die "$branchname already exists."
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elif test "$branchname" = "$headref"
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then
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die "cannot force-update the current branch."
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fi
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prev=`git rev-parse --verify "refs/heads/$branchname"`
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fi
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if test "$create_log" = 'yes'
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then
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mkdir -p $(dirname "$GIT_DIR/logs/refs/heads/$branchname")
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touch "$GIT_DIR/logs/refs/heads/$branchname"
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fi
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git update-ref -m "branch: Created from $head" "refs/heads/$branchname" "$rev" "$prev"
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1
git.c
1
git.c
@ -221,6 +221,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp)
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{ "add", cmd_add, RUN_SETUP },
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{ "apply", cmd_apply },
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{ "archive", cmd_archive },
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{ "branch", cmd_branch },
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{ "cat-file", cmd_cat_file, RUN_SETUP },
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{ "checkout-index", cmd_checkout_index, RUN_SETUP },
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{ "check-ref-format", cmd_check_ref_format },
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Block a user