From f4953fa0c187ddc3b9dc5b7f61650112c3b3963a Mon Sep 17 00:00:00 2001
From: Jonas Fonseca <fonseca@diku.dk>
Date: Mon, 9 Feb 2009 01:55:40 +0100
Subject: [PATCH] Add support for handling core.worktree

If this option is found set up GIT_DIR and GIT_WORK_TREE. Also, pass
the known git directory path to git ls-remote.

Requested-by: bill lam
---
 NEWS  |  1 +
 tig.c | 29 ++++++++++++++++++++++++++++-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/NEWS b/NEWS
index d96ef77..ea3296c 100644
--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,7 @@ Improvements:
    code in git's bash completion script.
  - Colors for 256-capable terminals can be specified as colorN.
  - Entering a number in the prompt will jump to that line number.
+ - Handle core.worktree by setting GIT_DIR and GIT_WORK_TREE.
 
 Bug fixes:
 
diff --git a/tig.c b/tig.c
index 9537208..613a734 100644
--- a/tig.c
+++ b/tig.c
@@ -6657,7 +6657,7 @@ static int
 load_refs(void)
 {
 	static const char *ls_remote_argv[SIZEOF_ARG] = {
-		"git", "ls-remote", ".", NULL
+		"git", "ls-remote", opt_git_dir, NULL
 	};
 	static bool init = FALSE;
 
@@ -6710,6 +6710,30 @@ set_repo_config_option(char *name, char *value, int (*cmd)(int, const char **))
 		warn("Option 'tig.%s': %s", name, config_msg);
 }
 
+static void
+set_work_tree(const char *value)
+{
+	char cwd[SIZEOF_STR];
+
+	if (!getcwd(cwd, sizeof(cwd)))
+		die("Failed to get cwd path: %s", strerror(errno));
+	if (chdir(opt_git_dir) < 0)
+		die("Failed to chdir(%s): %s", strerror(errno));
+	if (!getcwd(opt_git_dir, sizeof(opt_git_dir)))
+		die("Failed to get git path: %s", strerror(errno));
+	if (chdir(cwd) < 0)
+		die("Failed to chdir(%s): %s", cwd, strerror(errno));
+	if (chdir(value) < 0)
+		die("Failed to chdir(%s): %s", value, strerror(errno));
+	if (!getcwd(cwd, sizeof(cwd)))
+		die("Failed to get cwd path: %s", strerror(errno));
+	if (setenv("GIT_WORK_TREE", cwd, TRUE) < 0)
+		die("Failed to set GIT_WORK_TREE to '%s'", cwd);
+	if (setenv("GIT_DIR", opt_git_dir, TRUE) < 0)
+		die("Failed to set GIT_DIR to '%s'", opt_git_dir);
+	opt_is_inside_work_tree = TRUE;
+}
+
 static int
 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
 {
@@ -6719,6 +6743,9 @@ read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen
 	else if (!strcmp(name, "core.editor"))
 		string_ncopy(opt_editor, value, valuelen);
 
+	else if (!strcmp(name, "core.worktree"))
+		set_work_tree(value);
+
 	else if (!prefixcmp(name, "tig.color."))
 		set_repo_config_option(name + 10, value, option_color_command);
 
-- 
2.30.2