[PATCH] Make .git directory validation code test HEAD

[git.git] / setup.c

diff --git a/setup.c b/setup.c
index b8789de..258da17 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -72,6 +72,24 @@ const char **get_pathspec(const char *prefix, char **pathspec)
        return (const char **) pathspec;
 }
 
+/*
+ * Test it it looks like we're at the top
+ * level git directory. We want to see a
+ *
+ *  - a HEAD symlink and a refs/ directory under ".git"
+ *  - either a .git/objects/ directory _or_ the proper
+ *    GIT_OBJECT_DIRECTORY environment variable
+ */
+static int is_toplevel_directory(void)
+{
+       struct stat st;
+
+       return  !lstat(".git/HEAD", &st) &&
+               S_ISLNK(st.st_mode) &&
+               !access(".git/refs/", X_OK) &&
+               (gitenv(DB_ENVIRONMENT) || !access(".git/objects/", X_OK));
+}
+
 const char *setup_git_directory(void)
 {
        static char cwd[PATH_MAX+1];
@@ -89,17 +107,8 @@ const char *setup_git_directory(void)
 
        offset = len = strlen(cwd);
        for (;;) {
-               /*
-                * We always want to see a .git/refs/ subdirectory
-                */
-               if (!access(".git/refs/", X_OK)) {
-                       /*
-                        * Then we need either a GIT_OBJECT_DIRECTORY define
-                        * or a .git/objects/ directory
-                        */
-                       if (gitenv(DB_ENVIRONMENT) || !access(".git/objects/", X_OK))
-                               break;
-               }
+               if (is_toplevel_directory())
+                       break;
                chdir("..");
                do {
                        if (!offset)