It can be useful to have grafts or replace refs for specific use-cases while
keeping the default "view" of the repository pristine (or with a different
set of grafts/replace refs).
It is possible to use a different graft file with GIT_GRAFT_FILE, but while
replace refs are more powerful, they don't have an equivalent override.
Add a GIT_REPLACE_NAMESPACE environment variable to control where git is
going to look for replace refs.
Signed-off-by: Mike Hommey <mh@xxxxxxxxxxxx>
---
I'm not sure if I need to care about avoiding strlen in log-tree.c, or if I
should handle the lack of a / at the end of GIT_REPLACE_NAMESPACE.
builtin/replace.c | 6 +++---
cache.h | 2 ++
environment.c | 6 ++++++
log-tree.c | 5 +++--
refs.c | 3 ++-
5 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/builtin/replace.c b/builtin/replace.c
index 54bf01a..bb5bc84 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -104,9 +104,9 @@ static int for_each_replace_name(const char **argv, each_replace_name_fn fn)
continue;
}
full_hex = sha1_to_hex(sha1);
- snprintf(ref, sizeof(ref), "refs/replace/%s", full_hex);
+ snprintf(ref, sizeof(ref), "%s%s", git_replace_namespace, full_hex);
/* read_ref() may reuse the buffer */
- full_hex = ref + strlen("refs/replace/");
+ full_hex = ref + strlen(git_replace_namespace);
if (read_ref(ref, sha1)) {
error("replace ref '%s' not found.", full_hex);
had_error = 1;
@@ -134,7 +134,7 @@ static void check_ref_valid(unsigned char object[20],
int force)
{
if (snprintf(ref, ref_size,
- "refs/replace/%s",
+ "%s%s", git_replace_namespace,
sha1_to_hex(object)) > ref_size - 1)
die("replace ref name too long: %.*s...", 50, ref);
if (check_refname_format(ref, 0))
diff --git a/cache.h b/cache.h
index badf3da..9553edc 100644
--- a/cache.h
+++ b/cache.h
@@ -384,6 +384,7 @@ static inline enum object_type object_type(unsigned int mode)
#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
+#define GIT_REPLACE_NAMESPACE_ENVIRONMENT "GIT_REPLACE_NAMESPACE"
#define GITATTRIBUTES_FILE ".gitattributes"
#define INFOATTRIBUTES_FILE "info/attributes"
#define ATTRIBUTE_MACRO_PREFIX "[attr]"
@@ -605,6 +606,7 @@ extern unsigned long pack_size_limit_cfg;
* been sought but there were none.
*/
extern int check_replace_refs;
+extern char *git_replace_namespace;
extern int fsync_object_files;
extern int core_preload_index;
diff --git a/environment.c b/environment.c
index a40044c..c836b61 100644
--- a/environment.c
+++ b/environment.c
@@ -47,6 +47,7 @@ const char *askpass_program;
const char *excludes_file;
enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
int check_replace_refs = 1;
+char *git_replace_namespace;
enum eol core_eol = EOL_UNSET;
enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
@@ -109,6 +110,7 @@ const char * const local_repo_env[] = {
GRAFT_ENVIRONMENT,
INDEX_ENVIRONMENT,
NO_REPLACE_OBJECTS_ENVIRONMENT,
+ GIT_REPLACE_NAMESPACE_ENVIRONMENT,
GIT_PREFIX_ENVIRONMENT,
GIT_SHALLOW_FILE_ENVIRONMENT,
NULL
@@ -145,6 +147,7 @@ static void setup_git_env(void)
{
const char *gitfile;
const char *shallow_file;
+ const char *replace_namespace;
git_dir = getenv(GIT_DIR_ENVIRONMENT);
if (!git_dir)
@@ -156,6 +159,9 @@ static void setup_git_env(void)
git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, "info/grafts");
if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
check_replace_refs = 0;
+ replace_namespace = getenv(GIT_REPLACE_NAMESPACE_ENVIRONMENT);
+ git_replace_namespace = xstrdup(replace_namespace ? replace_namespace
+ : "refs/replace/");
namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
namespace_len = strlen(namespace);
shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
diff --git a/log-tree.c b/log-tree.c
index c931615..9e60137 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -96,11 +96,12 @@ static int add_ref_decoration(const char *refname, const unsigned char *sha1, in
assert(cb_data == NULL);
- if (starts_with(refname, "refs/replace/")) {
+ if (starts_with(refname, git_replace_namespace)) {
unsigned char original_sha1[20];
if (!check_replace_refs)
return 0;
- if (get_sha1_hex(refname + 13, original_sha1)) {
+ if (get_sha1_hex(refname + strlen(git_replace_namespace),
+ original_sha1)) {
warning("invalid replace ref %s", refname);
return 0;
}
diff --git a/refs.c b/refs.c
index 67d6745..0993d1c 100644
--- a/refs.c
+++ b/refs.c
@@ -2089,7 +2089,8 @@ int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *c
int for_each_replace_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref(&ref_cache, "refs/replace/", fn, 13, 0, cb_data);
+ return do_for_each_ref(&ref_cache, git_replace_namespace, fn,
+ strlen(git_replace_namespace), 0, cb_data);
}
int head_ref_namespaced(each_ref_fn fn, void *cb_data)
--
2.4.3.1.gb3b6c0d.dirty
--
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