$GIT_COMMON_DIR: a new environment variable

[thirdparty/git.git] / environment.c

diff --git a/environment.c b/environment.c
index fee12a605d0c1432b9ad059340f6cdef5574ff78..050f1607d531460969e2f7d49d526c4176a9679b 100644 (file)
--- a/environment.c
+++ b/environment.c
@@ -81,9 +81,9 @@ static char *work_tree;
 static const char *namespace;
 static size_t namespace_len;
 
-static const char *git_dir;
+static const char *git_dir, *git_common_dir;
 static char *git_object_dir, *git_index_file, *git_graft_file;
-int git_db_env, git_index_env, git_graft_env;
+int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
 
 /*
  * Repository-local GIT_* environment variables; see cache.h for details.
@@ -101,6 +101,7 @@ const char * const local_repo_env[] = {
        NO_REPLACE_OBJECTS_ENVIRONMENT,
        GIT_PREFIX_ENVIRONMENT,
        GIT_SHALLOW_FILE_ENVIRONMENT,
+       GIT_COMMON_DIR_ENVIRONMENT,
        NULL
 };
 
@@ -125,8 +126,8 @@ static char *expand_namespace(const char *raw_namespace)
        return strbuf_detach(&buf, NULL);
 }
 
-static char *git_path_from_env(const char *envvar, const char *path,
-                              int *fromenv)
+static char *git_path_from_env(const char *envvar, const char *git_dir,
+                              const char *path, int *fromenv)
 {
        const char *value = getenv(envvar);
        if (!value) {
@@ -149,9 +150,18 @@ static void setup_git_env(void)
                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
        gitfile = read_gitfile(git_dir);
        git_dir = xstrdup(gitfile ? gitfile : git_dir);
-       git_object_dir = git_path_from_env(DB_ENVIRONMENT, "objects", &git_db_env);
-       git_index_file = git_path_from_env(INDEX_ENVIRONMENT, "index", &git_index_env);
-       git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, "info/grafts", &git_graft_env);
+       git_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT);
+       if (git_common_dir) {
+               git_common_dir_env = 1;
+               git_common_dir = xstrdup(git_common_dir);
+       } else
+               git_common_dir = git_dir;
+       git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
+                                          "objects", &git_db_env);
+       git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
+                                          "index", &git_index_env);
+       git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
+                                          "info/grafts", &git_graft_env);
        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
                check_replace_refs = 0;
        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
@@ -174,6 +184,11 @@ const char *get_git_dir(void)
        return git_dir;
 }
 
+const char *get_git_common_dir(void)
+{
+       return git_common_dir;
+}
+
 const char *get_git_namespace(void)
 {
        if (!namespace)