git_path(): be aware of file relocation in $GIT_DIR

[thirdparty/git.git] / environment.c

diff --git a/environment.c b/environment.c
index 565f65293bb25ebdcb6ada262bcca9164c3ea113..fee12a605d0c1432b9ad059340f6cdef5574ff78 100644 (file)
--- a/environment.c
+++ b/environment.c
@@ -83,6 +83,7 @@ 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.
@@ -124,10 +125,18 @@ 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)
+static char *git_path_from_env(const char *envvar, const char *path,
+                              int *fromenv)
 {
        const char *value = getenv(envvar);
-       return value ? xstrdup(value) : git_pathdup("%s", path);
+       if (!value) {
+               char *buf = xmalloc(strlen(git_dir) + strlen(path) + 2);
+               sprintf(buf, "%s/%s", git_dir, path);
+               return buf;
+       }
+       if (fromenv)
+               *fromenv = 1;
+       return xstrdup(value);
 }
 
 static void setup_git_env(void)
@@ -140,9 +149,9 @@ 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_index_file = git_path_from_env(INDEX_ENVIRONMENT, "index");
-       git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, "info/grafts");
+       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);
        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
                check_replace_refs = 0;
        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));