If the file "$GIT_DIR/commondir" exists, it contains the value of
$GIT_COMMON_DIR.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
Documentation/gitrepository-layout.txt | 7 ++++++
setup.c | 43 +++++++++++++++++++++++++++++-----
2 files changed, 44 insertions(+), 6 deletions(-)
diff --git a/Documentation/gitrepository-layout.txt b/Documentation/gitrepository-layout.txt
index 2b5966a..2dc5667 100644
--- a/Documentation/gitrepository-layout.txt
+++ b/Documentation/gitrepository-layout.txt
@@ -240,6 +240,13 @@ shallow::
file is ignored if $GIT_COMMON_DIR is set and
"$GIT_COMMON_DIR/shallow" will be used instead.
+commondir::
+ If this file exists, $GIT_COMMON_DIR (see linkgit:git[1]) will
+ be set to the path specified in this file if it is not
+ explicitly set. If the specified path is relative, it is
+ relative to $GIT_DIR. The repository with commondir is
+ incomplete without the repository pointed by "commondir".
+
modules::
Contains the git-repositories of the submodules. This
directory is ignored if $GIT_COMMON_DIR is set and
diff --git a/setup.c b/setup.c
index afd6742..6c52f75 100644
--- a/setup.c
+++ b/setup.c
@@ -224,6 +224,33 @@ void verify_non_filename(const char *prefix, const char *arg)
"'git <command> [<revision>...] -- [<file>...]'", arg);
}
+static void get_common_dir(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);
+ if (git_common_dir) {
+ strbuf_addstr(sb, git_common_dir);
+ return;
+ }
+ strbuf_addf(&path, "%s/commondir", gitdir);
+ if (file_exists(path.buf)) {
+ if (strbuf_read_file(&data, path.buf, 0) <= 0)
+ die_errno(_("failed to read %s"), path.buf);
+ while (data.len && (data.buf[data.len - 1] == '\n' ||
+ data.buf[data.len - 1] == '\r'))
+ data.len--;
+ data.buf[data.len] = '\0';
+ strbuf_reset(&path);
+ if (!is_absolute_path(data.buf))
+ strbuf_addf(&path, "%s/", gitdir);
+ strbuf_addbuf(&path, &data);
+ strbuf_addstr(sb, real_path(path.buf));
+ } else
+ strbuf_addstr(sb, gitdir);
+ strbuf_release(&data);
+ strbuf_release(&path);
+}
/*
* Test if it looks like we're at a git directory.
@@ -242,13 +269,22 @@ int is_git_directory(const char *suspect)
int ret = 0;
size_t len;
- strbuf_addstr(&path, suspect);
+ /* Check worktree-related signatures */
+ strbuf_addf(&path, "%s/HEAD", suspect);
+ if (validate_headref(path.buf))
+ goto done;
+
+ strbuf_reset(&path);
+ get_common_dir(&path, suspect);
len = path.len;
+
+ /* Check non-worktree-related signatures */
if (getenv(DB_ENVIRONMENT)) {
if (access(getenv(DB_ENVIRONMENT), X_OK))
goto done;
}
else {
+ strbuf_setlen(&path, len);
strbuf_addstr(&path, "/objects");
if (access(path.buf, X_OK))
goto done;
@@ -259,11 +295,6 @@ int is_git_directory(const char *suspect)
if (access(path.buf, X_OK))
goto done;
- strbuf_setlen(&path, len);
- strbuf_addstr(&path, "/HEAD");
- if (validate_headref(path.buf))
- goto done;
-
ret = 1;
done:
strbuf_release(&path);
--
2.1.0.rc0.78.gc0d8480
--
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