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path: implement common_dir handling in git_pathdup_submodule()

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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_pathdup_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@max630.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Max Kirillov
2015-09-14 01:17:42 +03:00
committed by Junio C Hamano
parent 35fb4d2e3d
commit 11f9dd7191
4 changed files with 41 additions and 9 deletions
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17
setup.c
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@ -228,15 +228,22 @@ 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)