This patch started as a refactoring to make 'get_next_submodule' more
readable, but upon doing so, I realized that "git fetch" of the submodule
actually doesn't need to be run in the submodules worktree. So let's run
it in its git dir instead.
That should pave the way towards fetching submodules that are currently
not checked out.
Signed-off-by: Stefan Beller <sbel...@google.com>
---
submodule.c | 45 +++++++++++++++++++++++++++----------
t/t5526-fetch-submodules.sh | 7 +++++-
2 files changed, 39 insertions(+), 13 deletions(-)
diff --git a/submodule.c b/submodule.c
index 00a9a3c6b12..88bce534268 100644
--- a/submodule.c
+++ b/submodule.c
@@ -481,6 +481,12 @@ void prepare_submodule_repo_env(struct argv_array *out)
DEFAULT_GIT_DIR_ENVIRONMENT);
}
+static void prepare_submodule_repo_env_in_gitdir(struct argv_array *out)
+{
+ prepare_submodule_repo_env_no_git_dir(out);
+ argv_array_pushf(out, "%s=.", GIT_DIR_ENVIRONMENT);
+}
+
/* Helper function to display the submodule header line prior to the full
* summary output. If it can locate the submodule objects directory it will
* attempt to lookup both the left and right commits and put them into the
@@ -1227,6 +1233,27 @@ static int get_fetch_recurse_config(const struct
submodule *submodule,
return spf->default_option;
}
+static char *get_submodule_git_dir(struct repository *r, const char *path)
+{
+ struct repository subrepo;
+ const char *ret;
+
+ if (repo_submodule_init(&subrepo, r, path)) {
+ /* no entry in .gitmodules? */
+ struct strbuf gitdir = STRBUF_INIT;
+ strbuf_repo_worktree_path(&gitdir, r, "%s/.git", path);
+ if (repo_init(&subrepo, gitdir.buf, NULL)) {
+ strbuf_release(&gitdir);
+ return NULL;
+ }
+ }
+
+ ret = xstrdup(subrepo.gitdir);
+ repo_clear(&subrepo);
+
+ return ret;
+}
+
static int get_next_submodule(struct child_process *cp,
struct strbuf *err, void *data, void **task_cb)
{
@@ -1234,8 +1261,6 @@ static int get_next_submodule(struct child_process *cp,
struct submodule_parallel_fetch *spf = data;
for (; spf->count < spf->r->index->cache_nr; spf->count++) {
- struct strbuf submodule_path = STRBUF_INIT;
- struct strbuf submodule_git_dir = STRBUF_INIT;
struct strbuf submodule_prefix = STRBUF_INIT;
const struct cache_entry *ce = spf->r->index->cache[spf->count];
const char *git_dir, *default_argv;
@@ -1274,16 +1299,12 @@ static int get_next_submodule(struct child_process *cp,
continue;
}
- strbuf_repo_worktree_path(&submodule_path, spf->r, "%s",
ce->name);
- strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
strbuf_addf(&submodule_prefix, "%s%s/", spf->prefix, ce->name);
- git_dir = read_gitfile(submodule_git_dir.buf);
- if (!git_dir)
- git_dir = submodule_git_dir.buf;
- if (is_directory(git_dir)) {
+ git_dir = get_submodule_git_dir(spf->r, ce->name);
+ if (git_dir) {
child_process_init(cp);
- cp->dir = strbuf_detach(&submodule_path, NULL);
- prepare_submodule_repo_env(&cp->env_array);
+ prepare_submodule_repo_env_in_gitdir(&cp->env_array);
+ cp->dir = git_dir;
cp->git_cmd = 1;
if (!spf->quiet)
strbuf_addf(err, "Fetching submodule %s%s\n",
@@ -1293,10 +1314,10 @@ static int get_next_submodule(struct child_process *cp,
argv_array_push(&cp->args, default_argv);
argv_array_push(&cp->args, "--submodule-prefix");
argv_array_push(&cp->args, submodule_prefix.buf);
+
+ free(git_dir);
ret = 1;
}
- strbuf_release(&submodule_path);
- strbuf_release(&submodule_git_dir);
strbuf_release(&submodule_prefix);
if (ret) {
spf->count++;
diff --git a/t/t5526-fetch-submodules.sh b/t/t5526-fetch-submodules.sh
index 6c2f9b2ba26..42692219a1a 100755
--- a/t/t5526-fetch-submodules.sh
+++ b/t/t5526-fetch-submodules.sh
@@ -566,7 +566,12 @@ test_expect_success 'fetching submodule into a broken
repository' '
test_must_fail git -C dst status &&
test_must_fail git -C dst diff &&
- test_must_fail git -C dst fetch --recurse-submodules
+
+ # git-fetch cannot find the git directory of the submodule,
+ # so it will do nothing, successfully, as it cannot distinguish between
+ # this broken submodule and a submodule that was just set active but
+ # not cloned yet
+ git -C dst fetch --recurse-submodules
'
test_expect_success "fetch new commits when submodule got renamed" '
--
2.19.0.397.gdd90340f6a-goog
