diff mbox series

[06/13] submodule--helper: get remote names from any repository

Message ID 20220301000816.56177-7-chooglen@google.com (mailing list archive)
State Superseded
Headers show
Series submodule: convert parts of 'update' to C | expand

Commit Message

Glen Choo March 1, 2022, 12:08 a.m. UTC
From: Atharva Raykar <raykar.ath@gmail.com>

`get_default_remote()` retrieves the name of a remote by resolving the
refs from of the current repository's ref store.

Thus in order to use it for retrieving the remote name of a submodule,
we have to start a new subprocess which runs from the submodule
directory.

Let's instead introduce a function called `repo_get_default_remote()`
which takes any repository object and retrieves the remote accordingly.

`get_default_remote()` is then defined as a call to
`repo_get_default_remote()` with 'the_repository' passed to it.

Now that we have `repo_get_default_remote()`, we no longer have to start
a subprocess that called `submodule--helper get-default-remote` from
within the submodule directory.

So let's make a function called `get_default_remote_submodule()` which
takes a submodule path, and returns the default remote for that
submodule, all within the same process.

We can now use this function to save an unnecessary subprocess spawn in
`sync_submodule()`, and also in the next patch, which will require this
functionality.

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Shourya Shukla <periperidip@gmail.com>
Helped-by: Glen Choo <chooglen@google.com>
Signed-off-by: Atharva Raykar <raykar.ath@gmail.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Glen Choo <chooglen@google.com>
---
 builtin/submodule--helper.c | 39 +++++++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 15 deletions(-)

Comments

Junio C Hamano March 1, 2022, 2:46 a.m. UTC | #1
Glen Choo <chooglen@google.com> writes:

> +	struct ref_store *store = get_main_ref_store(repo);
> +	int ignore_errno;
> +	const char *refname = refs_resolve_ref_unsafe(store, "HEAD", 0, NULL,
> +						      NULL, &ignore_errno);

Given that 00/13 says this series is based on 715d08a9 (The eighth
batch, 2022-02-25), which includes 03bdcfcc (Merge branch
'ab/no-errno-from-resolve-ref-unsafe', 2022-02-11), I think the
above two lines are result of incorrect rebasing or something.

Have you compiled after you rebased?

It seems that after applying the band-aid below, t7406 seems to fail
for two of its tests, too, but if this were not even compiled, that
is to be expected X-<.




 builtin/submodule--helper.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git c/builtin/submodule--helper.c w/builtin/submodule--helper.c
index ea88f39fb4..21401ad99e 100644
--- c/builtin/submodule--helper.c
+++ w/builtin/submodule--helper.c
@@ -36,9 +36,7 @@ static char *repo_get_default_remote(struct repository *repo)
 	char *dest = NULL, *ret;
 	struct strbuf sb = STRBUF_INIT;
 	struct ref_store *store = get_main_ref_store(repo);
-	int ignore_errno;
-	const char *refname = refs_resolve_ref_unsafe(store, "HEAD", 0, NULL,
-						      NULL, &ignore_errno);
+	const char *refname = refs_resolve_ref_unsafe(store, "HEAD", 0, NULL, NULL);
 
 	if (!refname)
 		die(_("No such ref: %s"), "HEAD");
Glen Choo March 1, 2022, 4:26 a.m. UTC | #2
Junio C Hamano <gitster@pobox.com> writes:

> Glen Choo <chooglen@google.com> writes:
>
>> +	struct ref_store *store = get_main_ref_store(repo);
>> +	int ignore_errno;
>> +	const char *refname = refs_resolve_ref_unsafe(store, "HEAD", 0, NULL,
>> +						      NULL, &ignore_errno);
>
> Given that 00/13 says this series is based on 715d08a9 (The eighth
> batch, 2022-02-25), which includes 03bdcfcc (Merge branch
> 'ab/no-errno-from-resolve-ref-unsafe', 2022-02-11), I think the
> above two lines are result of incorrect rebasing or something.
>
> Have you compiled after you rebased?

It turns out that I didn't.. I got complacent after doing this merge a
few times.

> It seems that after applying the band-aid below, t7406 seems to fail
> for two of its tests, too, but if this were not even compiled, that
> is to be expected X-<.

This is an even sillier mistake.. patch 12 accidentally includes some
tests from es/superproject-aware-submodules (probably a bad merge
conflict resolution).

>
>
>
>  builtin/submodule--helper.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git c/builtin/submodule--helper.c w/builtin/submodule--helper.c
> index ea88f39fb4..21401ad99e 100644
> --- c/builtin/submodule--helper.c
> +++ w/builtin/submodule--helper.c
> @@ -36,9 +36,7 @@ static char *repo_get_default_remote(struct repository *repo)
>  	char *dest = NULL, *ret;
>  	struct strbuf sb = STRBUF_INIT;
>  	struct ref_store *store = get_main_ref_store(repo);
> -	int ignore_errno;
> -	const char *refname = refs_resolve_ref_unsafe(store, "HEAD", 0, NULL,
> -						      NULL, &ignore_errno);
> +	const char *refname = refs_resolve_ref_unsafe(store, "HEAD", 0, NULL, NULL);
>  
>  	if (!refname)
>  		die(_("No such ref: %s"), "HEAD");
diff mbox series

Patch

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 6b473fc0d2..f934e33c7e 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -31,11 +31,14 @@ 
 typedef void (*each_submodule_fn)(const struct cache_entry *list_item,
 				  void *cb_data);
 
-static char *get_default_remote(void)
+static char *repo_get_default_remote(struct repository *repo)
 {
 	char *dest = NULL, *ret;
 	struct strbuf sb = STRBUF_INIT;
-	const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
+	struct ref_store *store = get_main_ref_store(repo);
+	int ignore_errno;
+	const char *refname = refs_resolve_ref_unsafe(store, "HEAD", 0, NULL,
+						      NULL, &ignore_errno);
 
 	if (!refname)
 		die(_("No such ref: %s"), "HEAD");
@@ -48,7 +51,7 @@  static char *get_default_remote(void)
 		die(_("Expecting a full ref name, got %s"), refname);
 
 	strbuf_addf(&sb, "branch.%s.remote", refname);
-	if (git_config_get_string(sb.buf, &dest))
+	if (repo_config_get_string(repo, sb.buf, &dest))
 		ret = xstrdup("origin");
 	else
 		ret = dest;
@@ -57,6 +60,19 @@  static char *get_default_remote(void)
 	return ret;
 }
 
+static char *get_default_remote_submodule(const char *module_path)
+{
+	struct repository subrepo;
+
+	repo_submodule_init(&subrepo, the_repository, module_path, null_oid());
+	return repo_get_default_remote(&subrepo);
+}
+
+static char *get_default_remote(void)
+{
+	return repo_get_default_remote(the_repository);
+}
+
 static int print_default_remote(int argc, const char **argv, const char *prefix)
 {
 	char *remote;
@@ -1343,9 +1359,8 @@  static void sync_submodule(const char *path, const char *prefix,
 {
 	const struct submodule *sub;
 	char *remote_key = NULL;
-	char *sub_origin_url, *super_config_url, *displaypath;
+	char *sub_origin_url, *super_config_url, *displaypath, *default_remote;
 	struct strbuf sb = STRBUF_INIT;
-	struct child_process cp = CHILD_PROCESS_INIT;
 	char *sub_config_path = NULL;
 
 	if (!is_submodule_active(the_repository, path))
@@ -1384,21 +1399,15 @@  static void sync_submodule(const char *path, const char *prefix,
 	if (!is_submodule_populated_gently(path, NULL))
 		goto cleanup;
 
-	prepare_submodule_repo_env(&cp.env_array);
-	cp.git_cmd = 1;
-	cp.dir = path;
-	strvec_pushl(&cp.args, "submodule--helper",
-		     "print-default-remote", NULL);
-
 	strbuf_reset(&sb);
-	if (capture_command(&cp, &sb, 0))
+	default_remote = get_default_remote_submodule(path);
+	if (!default_remote)
 		die(_("failed to get the default remote for submodule '%s'"),
 		      path);
 
-	strbuf_strip_suffix(&sb, "\n");
-	remote_key = xstrfmt("remote.%s.url", sb.buf);
+	remote_key = xstrfmt("remote.%s.url", default_remote);
+	free(default_remote);
 
-	strbuf_reset(&sb);
 	submodule_to_gitdir(&sb, path);
 	strbuf_addstr(&sb, "/config");