We allow the user to relocate certain paths out of $GIT_DIR via
environment variables, e.g. GIT_OBJECT_DIRECTORY, GIT_INDEX_FILE and
GIT_GRAFT_FILE. All callers are not supposed to use git_path() or
git_pathdup() to get those paths. Instead they must use
get_object_directory(), get_index_file() and get_graft_file()
respectively. This is inconvenient and could be missed in review
(there's git_path(objects/info/alternates) somewhere in
sha1_file.c).
This patch makes git_path() and git_pathdup() understand those
environment variables. So if you set GIT_OBJECT_DIRECTORY to /foo/bar,
git_path(objects/abc) should return /tmp/bar/abc. The same is done
for the two remaining env variables.
git rev-parse --git-path is the wrapper for script use.
Signed-off-by: Nguyễn Thái Ngọc Duy pclo...@gmail.com
---
Documentation/git-rev-parse.txt | 5 +
builtin/rev-parse.c | 7 +++
cache.h | 1 +
environment.c | 9 ++--
path.c | 46 +
t/t0060-path-utils.sh | 19 +
6 files changed, 85 insertions(+), 2 deletions(-)
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index 0d2cdcd..33e4e90 100644
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -232,6 +232,11 @@ print a message to stderr and exit with nonzero status.
repository. If path is a gitfile then the resolved path
to the real repository is printed.
+--git-path path::
+ Resolve $GIT_DIR/path and takes other path relocation
+ variables such as $GIT_OBJECT_DIRECTORY,
+ $GIT_INDEX_FILE... into account.
+
--show-cdup::
When the command is invoked from a subdirectory, show the
path of the top-level directory relative to the current
diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index aaeb611..e50bc65 100644
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -518,6 +518,13 @@ int cmd_rev_parse(int argc, const char **argv, const char
*prefix)
for (i = 1; i argc; i++) {
const char *arg = argv[i];
+ if (!strcmp(arg, --git-path)) {
+ if (!argv[i + 1])
+ die(--git-path requires an argument);
+ puts(git_path(%s, argv[i + 1]));
+ i++;
+ continue;
+ }
if (as_is) {
if (show_file(arg, output_prefix) as_is 2)
verify_filename(prefix, arg, 0);
diff --git a/cache.h b/cache.h
index 8d3697e..6c08e4a 100644
--- a/cache.h
+++ b/cache.h
@@ -585,6 +585,7 @@ extern int fsync_object_files;
extern int core_preload_index;
extern int core_apply_sparse_checkout;
extern int precomposed_unicode;
+extern int git_db_env, git_index_env, git_graft_env;
/*
* The character that begins a commented line in user-editable file
diff --git a/environment.c b/environment.c
index 4a3437d..f513479 100644
--- a/environment.c
+++ b/environment.c
@@ -82,6 +82,7 @@ static size_t namespace_len;
static const char *git_dir;
static char *git_object_dir, *git_index_file, *git_graft_file;
+int git_db_env, git_index_env, git_graft_env;
/*
* Repository-local GIT_* environment variables; see cache.h for details.
@@ -137,15 +138,19 @@ static void setup_git_env(void)
if (!git_object_dir) {
git_object_dir = xmalloc(strlen(git_dir) + 9);
sprintf(git_object_dir, %s/objects, git_dir);
- }
+ } else
+ git_db_env = 1;
git_index_file = getenv(INDEX_ENVIRONMENT);
if (!git_index_file) {
git_index_file = xmalloc(strlen(git_dir) + 7);
sprintf(git_index_file, %s/index, git_dir);
- }
+ } else
+ git_index_env = 1;
git_graft_file = getenv(GRAFT_ENVIRONMENT);
if (!git_graft_file)
git_graft_file = git_pathdup(info/grafts);
+ else
+ git_graft_env = 1;
if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
read_replace_refs = 0;
namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
diff --git a/path.c b/path.c
index ccd7228..e020530 100644
--- a/path.c
+++ b/path.c
@@ -60,13 +60,59 @@ char *mksnpath(char *buf, size_t n, const char *fmt, ...)
return cleanup_path(buf);
}
+static int dir_prefix(const char *buf, const char *dir)
+{
+ int len = strlen(dir);
+ return !strncmp(buf, dir, len)
+ (is_dir_sep(buf[len]) || buf[len] == '\0');
+}
+
+/* $buf =~ m|$dir/+$file| but without regex */
+static int is_dir_file(const char *buf, const char *dir, const char *file)
+{
+ int len = strlen(dir);
+ if (strncmp(buf, dir, len) || !is_dir_sep(buf[len]))
+ return 0;
+ while (is_dir_sep(buf[len]))
+ len++;
+ return
