On Tue, Aug 4, 2015 at 3:05 PM, Max Kirillov <max@xxxxxxxxxx> wrote:
> When submodule is a linked worktree, "git diff --submodule" and other
> calls which directly access the submodule's object database do not correctly
> calculate its path. Fix it by changing the git_path_submodule() behavior,
> to use either common or per-worktree directory.
>
> Do it similarly as for parent repository, but ignore the GIT_COMMON_DIR
> environment variable, because it would mean common directory for the parent
> repository and does not make sense for submodule.
>
> Also add test for functionality which uses this call.
>
> Signed-off-by: Max Kirillov <max@xxxxxxxxxx>
> ---
> cache.h | 1 +
> path.c | 24 ++++++++++++++++++++----
> setup.c | 17 ++++++++++++-----
> t/t7410-submodule-checkout-to.sh | 10 ++++++++++
> 4 files changed, 43 insertions(+), 9 deletions(-)
>
> diff --git a/cache.h b/cache.h
> index 4f55466..b87ec75 100644
> --- a/cache.h
> +++ b/cache.h
> @@ -442,6 +442,7 @@ extern char *get_object_directory(void);
> extern char *get_index_file(void);
> extern char *get_graft_file(void);
> extern int set_git_dir(const char *path);
> +extern int get_common_dir_noenv(struct strbuf *sb, const char *gitdir);
> extern int get_common_dir(struct strbuf *sb, const char *gitdir);
> extern const char *get_git_namespace(void);
> extern const char *strip_namespace(const char *namespaced_ref);
> diff --git a/path.c b/path.c
> index 10f4cbf..b0cf444 100644
> --- a/path.c
> +++ b/path.c
> @@ -98,7 +98,7 @@ static const char *common_list[] = {
> NULL
> };
>
> -static void update_common_dir(struct strbuf *buf, int git_dir_len)
> +static void update_common_dir(struct strbuf *buf, int git_dir_len, const char *common_dir)
> {
> char *base = buf->buf + git_dir_len;
> const char **p;
> @@ -115,12 +115,17 @@ static void update_common_dir(struct strbuf *buf, int git_dir_len)
> path++;
> is_dir = 1;
> }
> +
> + if (!common_dir) {
> + common_dir = get_git_common_dir();
> + }
Usually we omit the braces for blocks with just one command.
> +
> if (is_dir && dir_prefix(base, path)) {
> - replace_dir(buf, git_dir_len, get_git_common_dir());
> + replace_dir(buf, git_dir_len, common_dir);
> return;
> }
> if (!is_dir && !strcmp(base, path)) {
> - replace_dir(buf, git_dir_len, get_git_common_dir());
> + replace_dir(buf, git_dir_len, common_dir);
> return;
> }
> }
> @@ -160,7 +165,7 @@ static void adjust_git_path(struct strbuf *buf, int git_dir_len)
> else if (git_db_env && dir_prefix(base, "objects"))
> replace_dir(buf, git_dir_len + 7, get_object_directory());
> else if (git_common_dir_env)
> - update_common_dir(buf, git_dir_len);
> + update_common_dir(buf, git_dir_len, NULL);
> }
>
> static void do_git_path(struct strbuf *buf, const char *fmt, va_list args)
> @@ -228,6 +233,8 @@ const char *git_path_submodule(const char *path, const char *fmt, ...)
> {
> struct strbuf *buf = get_pathname();
> const char *git_dir;
> + struct strbuf git_submodule_common_dir = STRBUF_INIT;
> + struct strbuf git_submodule_dir = STRBUF_INIT;
> va_list args;
>
> strbuf_addstr(buf, path);
> @@ -241,11 +248,20 @@ const char *git_path_submodule(const char *path, const char *fmt, ...)
> strbuf_addstr(buf, git_dir);
> }
> strbuf_addch(buf, '/');
> + strbuf_addstr(&git_submodule_dir, buf->buf);
>
> va_start(args, fmt);
> strbuf_vaddf(buf, fmt, args);
> va_end(args);
> +
> + if (get_common_dir_noenv(&git_submodule_common_dir, git_submodule_dir.buf)) {
> + update_common_dir(buf, git_submodule_dir.len, git_submodule_common_dir.buf);
> + }
> +
> strbuf_cleanup_path(buf);
> +
> + strbuf_release(&git_submodule_dir);
> + strbuf_release(&git_submodule_common_dir);
> return buf->buf;
> }
>
> diff --git a/setup.c b/setup.c
> index 82c0cc2..39ea06b 100644
> --- a/setup.c
> +++ b/setup.c
> @@ -229,14 +229,21 @@ void verify_non_filename(const char *prefix, const char *arg)
>
> int get_common_dir(struct strbuf *sb, const char *gitdir)
> {
> + const char *git_env_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT);
> + if (git_env_common_dir) {
> + strbuf_addstr(sb, git_env_common_dir);
> + return 1;
> + } else {
> + return get_common_dir_noenv(sb, gitdir);
> + }
> +}
> +
> +int get_common_dir_noenv(struct strbuf *sb, const char *gitdir)
> +{
> struct strbuf data = STRBUF_INIT;
> struct strbuf path = STRBUF_INIT;
> - const char *git_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT);
> int ret = 0;
> - if (git_common_dir) {
> - strbuf_addstr(sb, git_common_dir);
> - return 1;
> - }
> +
> strbuf_addf(&path, "%s/commondir", gitdir);
> if (file_exists(path.buf)) {
> if (strbuf_read_file(&data, path.buf, 0) <= 0)
> diff --git a/t/t7410-submodule-checkout-to.sh b/t/t7410-submodule-checkout-to.sh
> index 3f609e8..1acef32 100755
> --- a/t/t7410-submodule-checkout-to.sh
> +++ b/t/t7410-submodule-checkout-to.sh
> @@ -47,4 +47,14 @@ test_expect_success 'checkout main and initialize independed clones' \
> test_expect_success 'can see submodule diffs after independed cloning' \
> '(cd fully_cloned_submodule/main && git diff --submodule master"^!" | grep "file1 updated")'
>
> +test_expect_success 'checkout sub manually' \
> + 'mkdir linked_submodule &&
> + (cd clone/main &&
> + git worktree add "$base_path/linked_submodule/main" "$rev1_hash_main") &&
> + (cd clone/main/sub &&
> + git worktree add "$base_path/linked_submodule/main/sub" "$rev1_hash_sub")'
> +
> +test_expect_success 'can see submodule diffs after manual checkout of linked submodule' \
> + '(cd linked_submodule/main && git diff --submodule master"^!" | grep "file1 updated")'
> +
> test_done
> --
> 2.3.4.2801.g3d0809b
Looks good to me otherwise.
>
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