#include "builtin.h"
static const char builtin_branch_usage[] =
- "git-branch [-r] (-d | -D) <branchname> | [-l] [-f] <branchname> [<start-point>] | (-m | -M) [<oldbranch>] <newbranch> | [--color | --no-color] [-r | -a] [-v [--abbrev=<length> | --no-abbrev]]";
+ "git-branch [-r] (-d | -D) <branchname> | [-
-track | --no-track] [-l] [-f] <branchname> [<start-point>] | (-m | -M) [<oldbranch>] <newbranch> | [--color | --no-color] [-r | -a] [-v [--abbrev=<length> | --no-abbrev]]";
#define REF_UNKNOWN_TYPE 0x00
#define REF_LOCAL_BRANCH 0x01
static const char *head;
static unsigned char head_sha1[20];
+static int branch_track_remotes;
+
static int branch_use_color;
static char branch_colors[][COLOR_MAXLEN] = {
"\033[m", /* reset */
color_parse(value, var, branch_colors[slot]);
return 0;
}
+ if (!strcmp(var, "branch.autosetupmerge"))
+ branch_track_remotes = git_config_bool(var, value);
+
return git_default_config(var, value);
}
detached = (detached && (kinds & REF_LOCAL_BRANCH));
if (detached) {
struct ref_item item;
- item.name = "(no branch)";
+ 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++) {
free_ref_list(&ref_list);
}
+static char *config_repo;
+static char *config_remote;
+static const char *start_ref;
+
+static int get_remote_branch_name(const char *value)
+{
+ const char *colon;
+ const char *end;
+
+ if (*value == '+')
+ value++;
+
+ colon = strchr(value, ':');
+ if (!colon)
+ return 0;
+
+ end = value + strlen(value);
+
+ /*
+ * Try an exact match first. I.e. handle the case where the
+ * value is "$anything:refs/foo/bar/baz" and start_ref is exactly
+ * "refs/foo/bar/baz". Then the name at the remote is $anything.
+ */
+ if (!strcmp(colon + 1, start_ref)) {
+ /* Truncate the value before the colon. */
+ nfasprintf(&config_repo, "%.*s", colon - value, value);
+ return 1;
+ }
+
+ /*
+ * Is this a wildcard match?
+ */
+ if ((end - 2 <= value) || end[-2] != '/' || end[-1] != '*' ||
+ (colon - 2 <= value) || colon[-2] != '/' || colon[-1] != '*')
+ return 0;
+
+ /*
+ * Value is "refs/foo/bar/<asterisk>:refs/baz/boa/<asterisk>"
+ * and start_ref begins with "refs/baz/boa/"; the name at the
+ * remote is refs/foo/bar/ with the remaining part of the
+ * start_ref. The length of the prefix on the RHS is (end -
+ * colon - 2), including the slash immediately before the
+ * asterisk.
+ */
+ if ((strlen(start_ref) < end - colon - 2) ||
+ memcmp(start_ref, colon + 1, end - colon - 2))
+ return 0; /* does not match prefix */
+
+ /* Replace the asterisk with the remote branch name. */
+ nfasprintf(&config_repo, "%.*s%s",
+ (colon - 1) - value, value,
+ start_ref + (end - colon - 2));
+ return 1;
+}
+
+static int get_remote_config(const char *key, const char *value)
+{
+ const char *var;
+ if (prefixcmp(key, "remote."))
+ return 0;
+
+ var = strrchr(key, '.');
+ if (var == key + 6 || strcmp(var, ".fetch"))
+ return 0;
+ /*
+ * Ok, we are looking at key == "remote.$foo.fetch";
+ */
+ if (get_remote_branch_name(value))
+ nfasprintf(&config_remote, "%.*s", var - (key + 7), key + 7);
+
+ return 0;
+}
+
+static void set_branch_merge(const char *name, const char *config_remote,
+ const char *config_repo)
+{
+ char key[1024];
+ if (sizeof(key) <=
+ snprintf(key, sizeof(key), "branch.%s.remote", name))
+ die("what a long branch name you have!");
+ git_config_set(key, config_remote);
+
+ /*
+ * We do not have to check if we have enough space for
+ * the 'merge' key, since it's shorter than the
+ * previous 'remote' key, which we already checked.
+ */
+ snprintf(key, sizeof(key), "branch.%s.merge", name);
+ git_config_set(key, config_repo);
+}
+
+static void set_branch_defaults(const char *name, const char *real_ref)
+{
+ /*
+ * name is the name of new branch under refs/heads;
+ * real_ref is typically refs/remotes/$foo/$bar, where
+ * $foo is the remote name (there typically are no slashes)
+ * and $bar is the branch name we map from the remote
+ * (it could have slashes).
+ */
+ start_ref = real_ref;
+ git_config(get_remote_config);
+ if (!config_repo && !config_remote &&
+ !prefixcmp(real_ref, "refs/heads/")) {
+ set_branch_merge(name, ".", real_ref);
+ printf("Branch %s set up to track local branch %s.\n",
+ name, real_ref);
+ }
+
+ if (config_repo && config_remote) {
+ set_branch_merge(name, config_remote, config_repo);
+ printf("Branch %s set up to track remote branch %s.\n",
+ name, real_ref);
+ }
+
+ if (config_repo)
+ free(config_repo);
+ if (config_remote)
+ free(config_remote);
+}
+
static void create_branch(const char *name, const char *start_name,
- unsigned char *start_sha1,
- int force, int reflog)
+ int force, int reflog, int track)
{
struct ref_lock *lock;
struct commit *commit;
unsigned char sha1[20];
- char ref[PATH_MAX], msg[PATH_MAX + 20];
+ char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20];
int forcing = 0;
snprintf(ref, sizeof ref, "refs/heads/%s", name);
forcing = 1;
}
- if (start_sha1)
- /* detached HEAD */
- hashcpy(sha1, start_sha1);
- else if (get_sha1(start_name, sha1))
+ real_ref = NULL;
+ if (get_sha1(start_name, sha1))
die("Not a valid object name: '%s'.", start_name);
+ switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
+ case 0:
+ /* Not branching from any existing branch */
+ real_ref = NULL;
+ break;
+ case 1:
+ /* Unique completion -- good */
+ break;
+ default:
+ die("Ambiguous object name: '%s'.", start_name);
+ break;
+ }
+
if ((commit = lookup_commit_reference(sha1)) == NULL)
die("Not a valid branch point: '%s'.", start_name);
hashcpy(sha1, commit->object.sha1);
- lock = lock_any_ref_for_update(ref, NULL);
+ lock = lock_any_ref_for_update(ref, NULL, 0);
if (!lock)
die("Failed to lock ref for update: %s.", strerror(errno));
snprintf(msg, sizeof msg, "branch: Created from %s",
start_name);
+ /* When branching off a remote branch, set up so that git-pull
+ automatically merges from there. So far, this is only done for
+ remotes registered via .git/config. */
+ if (real_ref && track)
+ set_branch_defaults(name, real_ref);
+
if (write_ref_sha1(lock, sha1, msg) < 0)
die("Failed to write ref: %s.", strerror(errno));
+
+ if (real_ref)
+ free(real_ref);
}
static void rename_branch(const char *oldname, const char *newname, int force)
{
char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
unsigned char sha1[20];
+ char oldsection[PATH_MAX], newsection[PATH_MAX];
if (!oldname)
die("cannot rename the current branch while not on any.");
/* 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");
}
int cmd_branch(int argc, const char **argv, const char *prefix)
int delete = 0, force_delete = 0, force_create = 0;
int rename = 0, force_rename = 0;
int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
- int reflog = 0;
+ int reflog = 0, track;
int kinds = REF_LOCAL_BRANCH;
int i;
git_config(git_branch_config);
+ track = branch_track_remotes;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
i++;
break;
}
+ if (!strcmp(arg, "--track")) {
+ track = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--no-track")) {
+ track = 0;
+ continue;
+ }
if (!strcmp(arg, "-d")) {
delete = 1;
continue;
(rename && force_create))
usage(builtin_branch_usage);
- head = xstrdup(resolve_ref("HEAD", head_sha1, 0, NULL));
+ 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;
}
rename_branch(head, argv[i], force_rename);
else if (rename && (i == argc - 2))
rename_branch(argv[i], argv[i + 1], force_rename);
- else if (i == argc - 1)
- create_branch(argv[i], head, head_sha1, force_create, reflog);
- else if (i == argc - 2)
- create_branch(argv[i], argv[i+1], NULL, force_create, reflog);
+ else if (i == argc - 1 || i == argc - 2)
+ create_branch(argv[i], (i == argc - 2) ? argv[i+1] : head,
+ force_create, reflog, track);
else
usage(builtin_branch_usage);