refs.c: avoid repeated git_path calls in rename_tmp_log

diff --git a/environment.c b/environment.c
index a40044c3bf8040a36ddfb5c260b389ec63683abd..a533aed630c20a5e0718bcea4375875a44896416 100644 (file)
--- 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_ref_base;
 enum eol core_eol = EOL_UNSET;
 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
@@ -92,8 +93,9 @@ 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, git_common_dir_env;
 
 /*
  * Repository-local GIT_* environment variables; see cache.h for details.
@@ -109,8 +111,10 @@ const char * const local_repo_env[] = {
        GRAFT_ENVIRONMENT,
        INDEX_ENVIRONMENT,
        NO_REPLACE_OBJECTS_ENVIRONMENT,
+       GIT_REPLACE_REF_BASE_ENVIRONMENT,
        GIT_PREFIX_ENVIRONMENT,
        GIT_SHALLOW_FILE_ENVIRONMENT,
+       GIT_COMMON_DIR_ENVIRONMENT,
        NULL
 };
 
@@ -135,27 +139,46 @@ 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 *git_dir,
+                              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)
 {
+       struct strbuf sb = STRBUF_INIT;
        const char *gitfile;
        const char *shallow_file;
+       const char *replace_ref_base;
 
        git_dir = getenv(GIT_DIR_ENVIRONMENT);
        if (!git_dir)
                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");
+       if (get_common_dir(&sb, git_dir))
+               git_common_dir_env = 1;
+       git_common_dir = strbuf_detach(&sb, NULL);
+       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;
+       replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
+       git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
+                                                         : "refs/replace/");
        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
        namespace_len = strlen(namespace);
        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
@@ -176,6 +199,11 @@ 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)
@@ -209,6 +237,8 @@ void set_git_work_tree(const char *new_work_tree)
        }
        git_work_tree_initialized = 1;
        work_tree = xstrdup(real_path(new_work_tree));
+       if (setenv(GIT_WORK_TREE_ENVIRONMENT, work_tree, 1))
+               die("could not set GIT_WORK_TREE to '%s'", work_tree);
 }
 
 const char *get_git_work_tree(void)