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git/builtin-branch.c

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/*
* Builtin "git branch"
*
* Copyright (c) 2006 Kristian Høgsberg <krh@redhat.com>
* Based on git-branch.sh by Junio C Hamano.
*/
#include "cache.h"
#include "color.h"
#include "refs.h"
#include "commit.h"
#include "builtin.h"
#include "remote.h"
#include "parse-options.h"
#include "branch.h"
static const char * const builtin_branch_usage[] = {
"git-branch [options] [-r | -a] [--merged | --no-merged]",
"git-branch [options] [-l] [-f] <branchname> [<start-point>]",
"git-branch [options] [-r] (-d | -D) <branchname>",
"git-branch [options] (-m | -M) [<oldbranch>] <newbranch>",
NULL
};
#define REF_UNKNOWN_TYPE 0x00
#define REF_LOCAL_BRANCH 0x01
#define REF_REMOTE_BRANCH 0x02
#define REF_TAG 0x04
static const char *head;
static unsigned char head_sha1[20];
static int branch_use_color = -1;
static char branch_colors[][COLOR_MAXLEN] = {
"\033[m", /* reset */
"", /* PLAIN (normal) */
"\033[31m", /* REMOTE (red) */
"", /* LOCAL (normal) */
"\033[32m", /* CURRENT (green) */
};
enum color_branch {
COLOR_BRANCH_RESET = 0,
COLOR_BRANCH_PLAIN = 1,
COLOR_BRANCH_REMOTE = 2,
COLOR_BRANCH_LOCAL = 3,
COLOR_BRANCH_CURRENT = 4,
};
static int mergefilter = -1;
static int parse_branch_color_slot(const char *var, int ofs)
{
if (!strcasecmp(var+ofs, "plain"))
return COLOR_BRANCH_PLAIN;
if (!strcasecmp(var+ofs, "reset"))
return COLOR_BRANCH_RESET;
if (!strcasecmp(var+ofs, "remote"))
return COLOR_BRANCH_REMOTE;
if (!strcasecmp(var+ofs, "local"))
return COLOR_BRANCH_LOCAL;
if (!strcasecmp(var+ofs, "current"))
return COLOR_BRANCH_CURRENT;
die("bad config variable '%s'", var);
}
static int git_branch_config(const char *var, const char *value)
{
if (!strcmp(var, "color.branch")) {
branch_use_color = git_config_colorbool(var, value, -1);
return 0;
}
if (!prefixcmp(var, "color.branch.")) {
int slot = parse_branch_color_slot(var, 13);
if (!value)
return config_error_nonbool(var);
color_parse(value, var, branch_colors[slot]);
return 0;
}
return git_color_default_config(var, value);
}
static const char *branch_get_color(enum color_branch ix)
{
if (branch_use_color > 0)
return branch_colors[ix];
return "";
}
static int delete_branches(int argc, const char **argv, int force, int kinds)
{
struct commit *rev, *head_rev = head_rev;
unsigned char sha1[20];
char *name = NULL;
const char *fmt, *remote;
char section[PATH_MAX];
int i;
int ret = 0;
switch (kinds) {
case REF_REMOTE_BRANCH:
fmt = "refs/remotes/%s";
remote = "remote ";
force = 1;
break;
case REF_LOCAL_BRANCH:
fmt = "refs/heads/%s";
remote = "";
break;
default:
die("cannot use -a with -d");
}
if (!force) {
head_rev = lookup_commit_reference(head_sha1);
if (!head_rev)
die("Couldn't look up commit object for HEAD");
}
for (i = 0; i < argc; i++) {
if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) {
error("Cannot delete the branch '%s' "
"which you are currently on.", argv[i]);
ret = 1;
continue;
}
free(name);
name = xstrdup(mkpath(fmt, argv[i]));
if (!resolve_ref(name, sha1, 1, NULL)) {
error("%sbranch '%s' not found.",
remote, argv[i]);
ret = 1;
continue;
}
rev = lookup_commit_reference(sha1);
if (!rev) {
error("Couldn't look up commit object for '%s'", name);
ret = 1;
continue;
}
/* This checks whether the merge bases of branch and
* HEAD contains branch -- which means that the HEAD
* contains everything in both.
*/
if (!force &&
!in_merge_bases(rev, &head_rev, 1)) {
error("The branch '%s' is not an ancestor of "
"your current HEAD.\n"
"If you are sure you want to delete it, "
"run 'git branch -D %s'.", argv[i], argv[i]);
ret = 1;
continue;
}
if (delete_ref(name, sha1)) {
error("Error deleting %sbranch '%s'", remote,
argv[i]);
ret = 1;
} else {
printf("Deleted %sbranch %s.\n", remote, argv[i]);
snprintf(section, sizeof(section), "branch.%s",
argv[i]);
if (git_config_rename_section(section, NULL) < 0)
warning("Update of config-file failed");
}
}
free(name);
return(ret);
}
struct ref_item {
char *name;
unsigned int kind;
unsigned char sha1[20];
};
struct ref_list {
int index, alloc, maxwidth;
struct ref_item *list;
struct commit_list *with_commit;
int kinds;
};
static int has_commit(const unsigned char *sha1, struct commit_list *with_commit)
{
struct commit *commit;
if (!with_commit)
return 1;
commit = lookup_commit_reference_gently(sha1, 1);
if (!commit)
return 0;
while (with_commit) {
struct commit *other;
other = with_commit->item;
with_commit = with_commit->next;
if (in_merge_bases(other, &commit, 1))
return 1;
}
return 0;
}
static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
{
struct ref_list *ref_list = (struct ref_list*)(cb_data);
struct ref_item *newitem;
int kind = REF_UNKNOWN_TYPE;
int len;
static struct commit_list branch;
/* Detect kind */
if (!prefixcmp(refname, "refs/heads/")) {
kind = REF_LOCAL_BRANCH;
refname += 11;
} else if (!prefixcmp(refname, "refs/remotes/")) {
kind = REF_REMOTE_BRANCH;
refname += 13;
} else if (!prefixcmp(refname, "refs/tags/")) {
kind = REF_TAG;
refname += 10;
}
/* Filter with with_commit if specified */
if (!has_commit(sha1, ref_list->with_commit))
return 0;
/* Don't add types the caller doesn't want */
if ((kind & ref_list->kinds) == 0)
return 0;
if (mergefilter > -1) {
branch.item = lookup_commit_reference_gently(sha1, 1);
if (!branch.item)
die("Unable to lookup tip of branch %s", refname);
if (mergefilter == 0 && has_commit(head_sha1, &branch))
return 0;
if (mergefilter == 1 && !has_commit(head_sha1, &branch))
return 0;
}
/* Resize buffer */
if (ref_list->index >= ref_list->alloc) {
ref_list->alloc = alloc_nr(ref_list->alloc);
ref_list->list = xrealloc(ref_list->list,
ref_list->alloc * sizeof(struct ref_item));
}
/* Record the new item */
newitem = &(ref_list->list[ref_list->index++]);
newitem->name = xstrdup(refname);
newitem->kind = kind;
hashcpy(newitem->sha1, sha1);
len = strlen(newitem->name);
if (len > ref_list->maxwidth)
ref_list->maxwidth = len;
return 0;
}
static void free_ref_list(struct ref_list *ref_list)
{
int i;
for (i = 0; i < ref_list->index; i++)
free(ref_list->list[i].name);
free(ref_list->list);
}
static int ref_cmp(const void *r1, const void *r2)
{
struct ref_item *c1 = (struct ref_item *)(r1);
struct ref_item *c2 = (struct ref_item *)(r2);
if (c1->kind != c2->kind)
return c1->kind - c2->kind;
return strcmp(c1->name, c2->name);
}
static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
int abbrev, int current)
{
char c;
int color;
struct commit *commit;
switch (item->kind) {
case REF_LOCAL_BRANCH:
color = COLOR_BRANCH_LOCAL;
break;
case REF_REMOTE_BRANCH:
color = COLOR_BRANCH_REMOTE;
break;
default:
color = COLOR_BRANCH_PLAIN;
break;
}
c = ' ';
if (current) {
c = '*';
color = COLOR_BRANCH_CURRENT;
}
if (verbose) {
struct strbuf subject;
const char *sub = " **** invalid ref ****";
strbuf_init(&subject, 0);
commit = lookup_commit(item->sha1);
if (commit && !parse_commit(commit)) {
pretty_print_commit(CMIT_FMT_ONELINE, commit,
&subject, 0, NULL, NULL, 0, 0);
sub = subject.buf;
}
printf("%c %s%-*s%s %s %s\n", c, branch_get_color(color),
maxwidth, item->name,
branch_get_color(COLOR_BRANCH_RESET),
find_unique_abbrev(item->sha1, abbrev), sub);
strbuf_release(&subject);
} else {
printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
branch_get_color(COLOR_BRANCH_RESET));
}
}
static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
{
int i;
struct ref_list ref_list;
memset(&ref_list, 0, sizeof(ref_list));
ref_list.kinds = kinds;
ref_list.with_commit = with_commit;
for_each_ref(append_ref, &ref_list);
qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
detached = (detached && (kinds & REF_LOCAL_BRANCH));
if (detached && has_commit(head_sha1, with_commit)) {
struct ref_item item;
item.name = xstrdup("(no branch)");
item.kind = REF_LOCAL_BRANCH;
hashcpy(item.sha1, head_sha1);
if (strlen(item.name) > ref_list.maxwidth)
ref_list.maxwidth = strlen(item.name);
print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
free(item.name);
}
for (i = 0; i < ref_list.index; i++) {
int current = !detached &&
(ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
!strcmp(ref_list.list[i].name, head);
print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
abbrev, current);
}
free_ref_list(&ref_list);
}
static void rename_branch(const char *oldname, const char *newname, int force)
{
char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
unsigned char sha1[20];
char oldsection[PATH_MAX], newsection[PATH_MAX];
if (!oldname)
die("cannot rename the current branch while not on any.");
if (snprintf(oldref, sizeof(oldref), "refs/heads/%s", oldname) > sizeof(oldref))
die("Old branchname too long");
if (check_ref_format(oldref))
die("Invalid branch name: %s", oldref);
if (snprintf(newref, sizeof(newref), "refs/heads/%s", newname) > sizeof(newref))
die("New branchname too long");
if (check_ref_format(newref))
die("Invalid branch name: %s", newref);
if (resolve_ref(newref, sha1, 1, NULL) && !force)
die("A branch named '%s' already exists.", newname);
snprintf(logmsg, sizeof(logmsg), "Branch: renamed %s to %s",
oldref, newref);
if (rename_ref(oldref, newref, logmsg))
die("Branch rename failed");
/* no need to pass logmsg here as HEAD didn't really move */
if (!strcmp(oldname, head) && create_symref("HEAD", newref, NULL))
die("Branch renamed to %s, but HEAD is not updated!", newname);
snprintf(oldsection, sizeof(oldsection), "branch.%s", oldref + 11);
snprintf(newsection, sizeof(newsection), "branch.%s", newref + 11);
if (git_config_rename_section(oldsection, newsection) < 0)
die("Branch is renamed, but update of config-file failed");
}
static int opt_parse_with_commit(const struct option *opt, const char *arg, int unset)
{
unsigned char sha1[20];
struct commit *commit;
if (!arg)
return -1;
if (get_sha1(arg, sha1))
die("malformed object name %s", arg);
commit = lookup_commit_reference(sha1);
if (!commit)
die("no such commit %s", arg);
commit_list_insert(commit, opt->value);
return 0;
}
int cmd_branch(int argc, const char **argv, const char *prefix)
{
int delete = 0, rename = 0, force_create = 0;
int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
int reflog = 0;
enum branch_track track;
int kinds = REF_LOCAL_BRANCH;
struct commit_list *with_commit = NULL;
struct option options[] = {
OPT_GROUP("Generic options"),
OPT__VERBOSE(&verbose),
OPT_SET_INT( 0 , "track", &track, "set up tracking mode (see git-pull(1))",
BRANCH_TRACK_EXPLICIT),
OPT_BOOLEAN( 0 , "color", &branch_use_color, "use colored output"),
OPT_SET_INT('r', NULL, &kinds, "act on remote-tracking branches",
REF_REMOTE_BRANCH),
OPT_CALLBACK(0, "contains", &with_commit, "commit",
"print only branches that contain the commit",
opt_parse_with_commit),
{
OPTION_CALLBACK, 0, "with", &with_commit, "commit",
"print only branches that contain the commit",
PARSE_OPT_HIDDEN, opt_parse_with_commit,
},
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)"),
OPT_SET_INT(0, "merged", &mergefilter, "list only merged branches", 1),
OPT_END(),
};
git_config(git_branch_config);
if (branch_use_color == -1)
branch_use_color = git_use_color_default;
track = git_branch_track;
argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
if (!!delete + !!rename + !!force_create > 1)
usage_with_options(builtin_branch_usage, options);
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;
}
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;
}
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