[PATCH 5/5] With work-trees possibly inside git-dir, be more generous

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

The earlier work-tree behaviour was seriously bogus.  For regular working
tree operations, it checked if inside git dir.  That makes no sense, of
course, since the check should be for a work tree, and nothing else.

Fix that.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---

	Please consider giving this a real hard beating.  I think the
	old series was so bad only because nobody cared (including me).

 builtin-ls-files.c  |    8 +++++---
 builtin-rev-parse.c |    6 ++++++
 git-sh-setup.sh     |    3 +--
 git.c               |    7 +++++--
 4 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/builtin-ls-files.c b/builtin-ls-files.c
index 61577ea..d36181a 100644
--- a/builtin-ls-files.c
+++ b/builtin-ls-files.c
@@ -469,9 +469,11 @@ int cmd_ls_files(int argc, const char **argv, const char *prefix)
 		break;
 	}
 
-	if (require_work_tree &&
-			(!is_inside_work_tree() || is_inside_git_dir()))
-		die("This operation must be run in a work tree");
+	if (require_work_tree && !is_inside_work_tree()) {
+		const char *work_tree = get_git_work_tree();
+		if (!work_tree || chdir(work_tree))
+			die("This operation must be run in a work tree");
+	}
 
 	pathspec = get_pathspec(prefix, argv + i);
 
diff --git a/builtin-rev-parse.c b/builtin-rev-parse.c
index 497903a..3804541 100644
--- a/builtin-rev-parse.c
+++ b/builtin-rev-parse.c
@@ -320,7 +320,13 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 				continue;
 			}
 			if (!strcmp(arg, "--show-cdup")) {
+				const char *work_tree = get_git_work_tree();
 				const char *pfx = prefix;
+
+				if (work_tree) {
+					printf("%s\n", work_tree);
+					continue;
+				}
 				while (pfx) {
 					pfx = strchr(pfx, '/');
 					if (pfx) {
diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index c51985e..7bef43f 100755
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -59,8 +59,7 @@ cd_to_toplevel () {
 }
 
 require_work_tree () {
-	test $(git rev-parse --is-inside-work-tree) = true &&
-	test $(git rev-parse --is-inside-git-dir) = false ||
+	test $(git rev-parse --is-inside-work-tree) = true ||
 	die "fatal: $0 cannot be used without a working tree."
 }
 
diff --git a/git.c b/git.c
index 5df10d3..03ce3bb 100644
--- a/git.c
+++ b/git.c
@@ -273,8 +273,11 @@ static int run_command(struct cmd_struct *p, int argc, const char **argv)
 	if (p->option & USE_PAGER)
 		setup_pager();
 	if ((p->option & NEED_WORK_TREE) &&
-	    (!is_inside_work_tree() || is_inside_git_dir()))
-		die("%s must be run in a work tree", p->cmd);
+	    !is_inside_work_tree()) {
+		const char *work_tree = get_git_work_tree();
+		if (!work_tree || chdir(work_tree))
+			die("%s must be run in a work tree", p->cmd);
+	}
 	trace_argv_printf(argv, argc, "trace: built-in: git");
 
 	status = p->fn(argc, argv, prefix);
-- 
1.5.3.rc2.42.gda8d-dirty