Merge 1.5.3.7 in

[git.git] / setup.c

diff --git a/setup.c b/setup.c
index 06004f15874fbcbab50eafd272c5898a34fcdcfe..2c7b5cb200414a0fa3f2727c68ea60e51b39c261 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -59,7 +59,7 @@ const char *prefix_path(const char *prefix, int len, const char *path)
 const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
 {
        static char path[PATH_MAX];
-       if (!pfx || !*pfx || arg[0] == '/')
+       if (!pfx || !*pfx || is_absolute_path(arg))
                return arg;
        memcpy(path, pfx, pfx_len);
        strcpy(path + pfx_len, arg);
@@ -206,6 +206,22 @@ static const char *set_work_tree(const char *dir)
        return NULL;
 }
 
+void setup_work_tree(void)
+{
+       const char *work_tree, *git_dir;
+       static int initialized = 0;
+
+       if (initialized)
+               return;
+       work_tree = get_git_work_tree();
+       git_dir = get_git_dir();
+       if (!is_absolute_path(git_dir))
+               set_git_dir(make_absolute_path(git_dir));
+       if (!work_tree || chdir(work_tree))
+               die("This operation must be run in a work tree");
+       initialized = 1;
+}
+
 /*
  * We cannot decide in this function whether we are in the work tree or
  * not, since the config can only be read _after_ this function was called.
@@ -227,9 +243,20 @@ const char *setup_git_directory_gently(int *nongit_ok)
                if (PATH_MAX - 40 < strlen(gitdirenv))
                        die("'$%s' too big", GIT_DIR_ENVIRONMENT);
                if (is_git_directory(gitdirenv)) {
+                       static char buffer[1024 + 1];
+                       const char *retval;
+
                        if (!work_tree_env)
                                return set_work_tree(gitdirenv);
-                       return NULL;
+                       retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
+                                       get_git_work_tree());
+                       if (!retval || !*retval)
+                               return NULL;
+                       set_git_dir(make_absolute_path(gitdirenv));
+                       if (chdir(work_tree_env) < 0)
+                               die ("Could not chdir to %s", work_tree_env);
+                       strcat(buffer, "/");
+                       return retval;
                }
                if (nongit_ok) {
                        *nongit_ok = 1;