mirror of
https://github.com/git/git
synced 2024-08-25 10:45:59 +00:00
branch --track: code cleanup and saner handling of local branches
This patch cleans up some complicated code, and replaces it with a cleaner version, using code from remote.[ch], which got extended a little in the process. This also enables us to fix two cases: The earlier "fix" to setup tracking only when the original ref started with "refs/remotes" is wrong. You are absolutely allowed to use a separate layout for your tracking branches. The correct fix, of course, is to set up tracking information only when there is a matching remote.<nick>.fetch line containing a colon. Another corner case was not handled properly. If two remotes write to the original ref, just warn the user and do not set up tracking. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
parent
b42f69273b
commit
6f084a56fc
|
@ -309,10 +309,7 @@ branch.autosetupmerge::
|
|||
so that gitlink:git-pull[1] will appropriately merge from that
|
||||
remote branch. Note that even if this option is not set,
|
||||
this behavior can be chosen per-branch using the `--track`
|
||||
and `--no-track` options. This option can have values
|
||||
'false' (never touch the configuration), 'all' (do this
|
||||
for all branches), or 'true' (do this only when
|
||||
branching from a remote tracking branch), and defaults to 'true'.
|
||||
and `--no-track` options. This option defaults to false.
|
||||
|
||||
branch.<name>.remote::
|
||||
When in branch <name>, it tells `git fetch` which remote to fetch.
|
||||
|
|
|
@ -52,9 +52,8 @@ OPTIONS
|
|||
set up configuration so that git-pull will automatically
|
||||
retrieve data from the remote branch. Set the
|
||||
branch.autosetupmerge configuration variable to true if you
|
||||
want git-checkout and git-branch to behave as if
|
||||
'--track' were given when you branch from a remote
|
||||
tracking branch.
|
||||
want git-checkout and git-branch to always behave as if
|
||||
'--track' were given.
|
||||
|
||||
--no-track::
|
||||
When -b is given and a branch is created off a remote branch,
|
||||
|
|
168
builtin-branch.c
168
builtin-branch.c
|
@ -10,6 +10,7 @@
|
|||
#include "refs.h"
|
||||
#include "commit.h"
|
||||
#include "builtin.h"
|
||||
#include "remote.h"
|
||||
|
||||
static const char builtin_branch_usage[] =
|
||||
"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]]";
|
||||
|
@ -22,7 +23,7 @@ static const char builtin_branch_usage[] =
|
|||
static const char *head;
|
||||
static unsigned char head_sha1[20];
|
||||
|
||||
static int branch_track = 1; /* 0 = none, 1 = remotes, 2 = all */
|
||||
static int branch_track = 1;
|
||||
|
||||
static int branch_use_color;
|
||||
static char branch_colors[][COLOR_MAXLEN] = {
|
||||
|
@ -66,12 +67,8 @@ static int git_branch_config(const char *var, const char *value)
|
|||
color_parse(value, var, branch_colors[slot]);
|
||||
return 0;
|
||||
}
|
||||
if (!strcmp(var, "branch.autosetupmerge")) {
|
||||
if (!strcmp(value, "all"))
|
||||
branch_track = 2;
|
||||
else
|
||||
if (!strcmp(var, "branch.autosetupmerge"))
|
||||
branch_track = git_config_bool(var, value);
|
||||
}
|
||||
|
||||
return git_default_config(var, value);
|
||||
}
|
||||
|
@ -328,125 +325,70 @@ static void print_ref_list(int kinds, int detached, int verbose, int abbrev)
|
|||
free_ref_list(&ref_list);
|
||||
}
|
||||
|
||||
static char *config_repo;
|
||||
static char *config_remote;
|
||||
static const char *start_ref;
|
||||
struct tracking {
|
||||
struct refspec spec;
|
||||
char *src;
|
||||
const char *remote;
|
||||
int matches;
|
||||
};
|
||||
|
||||
static int get_remote_branch_name(const char *value)
|
||||
static int find_tracked_branch(struct remote *remote, void *priv)
|
||||
{
|
||||
const char *colon;
|
||||
const char *end;
|
||||
struct tracking *tracking = priv;
|
||||
|
||||
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 $anything.
|
||||
*/
|
||||
if (!strcmp(colon + 1, start_ref)) {
|
||||
/* Truncate the value before the colon. */
|
||||
nfasprintf(&config_repo, "%.*s", colon - value, value);
|
||||
return 1;
|
||||
if (!remote_find_tracking(remote, &tracking->spec)) {
|
||||
if (++tracking->matches == 1) {
|
||||
tracking->src = tracking->spec.src;
|
||||
tracking->remote = remote->name;
|
||||
} else {
|
||||
free(tracking->spec.src);
|
||||
if (tracking->src) {
|
||||
free(tracking->src);
|
||||
tracking->src = NULL;
|
||||
}
|
||||
}
|
||||
tracking->spec.src = NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Is this a wildcard match?
|
||||
*/
|
||||
if ((end - 2 <= value) || end[-2] != '/' || end[-1] != '*' ||
|
||||
(colon - 2 <= value) || colon[-2] != '/' || colon[-1] != '*')
|
||||
return 0;
|
||||
|
||||
/*
|
||||
* Value is "refs/foo/bar/<asterisk>:refs/baz/boa/<asterisk>"
|
||||
* and start_ref begins with "refs/baz/boa/"; the name at the
|
||||
* remote is refs/foo/bar/ with the remaining part of the
|
||||
* start_ref. The length of the prefix on the RHS is (end -
|
||||
* colon - 2), including the slash immediately before the
|
||||
* asterisk.
|
||||
*/
|
||||
if ((strlen(start_ref) < end - colon - 2) ||
|
||||
memcmp(start_ref, colon + 1, end - colon - 2))
|
||||
return 0; /* does not match prefix */
|
||||
|
||||
/* Replace the asterisk with the remote branch name. */
|
||||
nfasprintf(&config_repo, "%.*s%s",
|
||||
(colon - 1) - value, value,
|
||||
start_ref + (end - colon - 2));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int get_remote_config(const char *key, const char *value)
|
||||
{
|
||||
const char *var;
|
||||
if (prefixcmp(key, "remote."))
|
||||
return 0;
|
||||
|
||||
var = strrchr(key, '.');
|
||||
if (var == key + 6 || strcmp(var, ".fetch"))
|
||||
return 0;
|
||||
/*
|
||||
* Ok, we are looking at key == "remote.$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)
|
||||
|
||||
/*
|
||||
* This is called when new_ref is branched off of orig_ref, and tries
|
||||
* to infer the settings for branch.<new_ref>.{remote,merge} from the
|
||||
* config.
|
||||
*/
|
||||
static int setup_tracking(const char *new_ref, const char *orig_ref)
|
||||
{
|
||||
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);
|
||||
struct tracking tracking;
|
||||
|
||||
/*
|
||||
* 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);
|
||||
}
|
||||
if (strlen(new_ref) > 1024 - 7 - 7 - 1)
|
||||
return error("Tracking not set up: name too long: %s",
|
||||
new_ref);
|
||||
|
||||
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);
|
||||
}
|
||||
memset(&tracking, 0, sizeof(tracking));
|
||||
tracking.spec.dst = (char *)orig_ref;
|
||||
if (for_each_remote(find_tracked_branch, &tracking) ||
|
||||
!tracking.matches)
|
||||
return 1;
|
||||
|
||||
if (config_repo && config_remote) {
|
||||
set_branch_merge(name, config_remote, config_repo);
|
||||
if (tracking.matches > 1)
|
||||
return error("Not tracking: ambiguous information for ref %s",
|
||||
orig_ref);
|
||||
|
||||
if (tracking.matches == 1) {
|
||||
sprintf(key, "branch.%s.remote", new_ref);
|
||||
git_config_set(key, tracking.remote ? tracking.remote : ".");
|
||||
sprintf(key, "branch.%s.merge", new_ref);
|
||||
git_config_set(key, tracking.src);
|
||||
free(tracking.src);
|
||||
printf("Branch %s set up to track remote branch %s.\n",
|
||||
name, real_ref);
|
||||
new_ref, orig_ref);
|
||||
}
|
||||
|
||||
if (config_repo)
|
||||
free(config_repo);
|
||||
if (config_remote)
|
||||
free(config_remote);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void create_branch(const char *name, const char *start_name,
|
||||
|
@ -508,10 +450,8 @@ static void create_branch(const char *name, const char *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 == 2 ||
|
||||
(track == 1 &&
|
||||
!prefixcmp(real_ref, "refs/remotes/"))))
|
||||
set_branch_defaults(name, real_ref);
|
||||
if (real_ref && track)
|
||||
setup_tracking(name, real_ref);
|
||||
|
||||
if (write_ref_sha1(lock, sha1, msg) < 0)
|
||||
die("Failed to write ref: %s.", strerror(errno));
|
||||
|
@ -582,7 +522,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
|
|||
break;
|
||||
}
|
||||
if (!strcmp(arg, "--track")) {
|
||||
track = 2;
|
||||
track = 1;
|
||||
continue;
|
||||
}
|
||||
if (!strcmp(arg, "--no-track")) {
|
||||
|
|
|
@ -148,13 +148,14 @@ test_expect_success 'test tracking setup via config' \
|
|||
test $(git config branch.my3.remote) = local &&
|
||||
test $(git config branch.my3.merge) = refs/heads/master'
|
||||
|
||||
test_expect_success 'autosetupmerge = all' '
|
||||
test_expect_success 'avoid ambiguous track' '
|
||||
git config branch.autosetupmerge true &&
|
||||
git config remote.ambi1.url = lalala &&
|
||||
git config remote.ambi1.fetch = refs/heads/lalala:refs/heads/master &&
|
||||
git config remote.ambi2.url = lilili &&
|
||||
git config remote.ambi2.fetch = refs/heads/lilili:refs/heads/master &&
|
||||
git branch all1 master &&
|
||||
test -z "$(git config branch.all1.merge)" &&
|
||||
git config branch.autosetupmerge all &&
|
||||
git branch all2 master &&
|
||||
test $(git config branch.all2.merge) = refs/heads/master
|
||||
test -z "$(git config branch.all1.merge)"
|
||||
'
|
||||
|
||||
test_expect_success 'test overriding tracking setup via --no-track' \
|
||||
|
@ -167,10 +168,10 @@ test_expect_success 'test overriding tracking setup via --no-track' \
|
|||
! test "$(git config branch.my2.remote)" = local &&
|
||||
! test "$(git config branch.my2.merge)" = refs/heads/master'
|
||||
|
||||
test_expect_success 'test local tracking setup' \
|
||||
test_expect_success 'no tracking without .fetch entries' \
|
||||
'git branch --track my6 s &&
|
||||
test $(git config branch.my6.remote) = . &&
|
||||
test $(git config branch.my6.merge) = refs/heads/s'
|
||||
test -z "$(git config branch.my6.remote)" &&
|
||||
test -z "$(git config branch.my6.merge)"'
|
||||
|
||||
test_expect_success 'test tracking setup via --track but deeper' \
|
||||
'git config remote.local.url . &&
|
||||
|
@ -182,8 +183,8 @@ test_expect_success 'test tracking setup via --track but deeper' \
|
|||
|
||||
test_expect_success 'test deleting branch deletes branch config' \
|
||||
'git branch -d my7 &&
|
||||
test "$(git config branch.my7.remote)" = "" &&
|
||||
test "$(git config branch.my7.merge)" = ""'
|
||||
test -z "$(git config branch.my7.remote)" &&
|
||||
test -z "$(git config branch.my7.merge)"'
|
||||
|
||||
test_expect_success 'test deleting branch without config' \
|
||||
'git branch my7 s &&
|
||||
|
|
Loading…
Reference in a new issue