add status.relativePaths config variable

The output of git-status was recently changed to output relative
paths. Setting this variable to false restores the old behavior for
any old-timers that prefer it.
Signed-off-by: NJeff King <peff@peff.net>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -762,6 +762,12 @@ showbranch.default::
 	The default set of branches for gitlink:git-show-branch[1].
 	See gitlink:git-show-branch[1].
 
+status.relativePaths::
+	By default, gitlink:git-status[1] shows paths relative to the
+	current directory. Setting this variable to `false` shows paths
+	relative to the repository root (this was the default for git
+	prior to v1.5.4).
+
 tar.umask::
 	This variable can be used to restrict the permission bits of
 	tar archive entries.  The default is 0002, which turns off the

Documentation/git-status.txt

@@ -42,7 +42,8 @@ template comments, and all the output lines are prefixed with '#'.
 
 The paths mentioned in the output, unlike many other git commands, are
 made relative to the current directory, if you are working in a
-subdirectory (this is on purpose, to help cutting and pasting).
+subdirectory (this is on purpose, to help cutting and pasting). See
+the status.relativePaths config option below.
 
 
 CONFIGURATION
@@ -53,6 +54,10 @@ mean the same thing and the latter is kept for backward
 compatibility) and `color.status.<slot>` configuration variables
 to colorize its output.
 
+If the config variable `status.relativePaths` is set to false, then all
+paths shown are relative to the repository root, not to the current
+directory.
+
 See Also
 --------
 gitlink:gitignore[5]

builtin-commit.c

@@ -285,7 +285,8 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix)
 	struct wt_status s;
 
 	wt_status_prepare(&s);
-	s.prefix = prefix;
+	if (wt_status_relative_paths)
+		s.prefix = prefix;
 
 	if (amend) {
 		s.amend = 1;

t/t7502-status.sh

@@ -88,4 +88,35 @@ test_expect_success 'status with relative paths' '
 
 '
 
+cat > expect << \EOF
+# On branch master
+# Changes to be committed:
+#   (use "git reset HEAD <file>..." to unstage)
+#
+#	new file:   dir2/added
+#
+# Changed but not updated:
+#   (use "git add <file>..." to update what will be committed)
+#
+#	modified:   dir1/modified
+#
+# Untracked files:
+#   (use "git add <file>..." to include in what will be committed)
+#
+#	dir1/untracked
+#	dir2/modified
+#	dir2/untracked
+#	expect
+#	output
+#	untracked
+EOF
+
+test_expect_success 'status without relative paths' '
+
+	git config status.relativePaths false
+	(cd dir1 && git status) > output &&
+	git diff expect output
+
+'
+
 test_done

wt-status.c

@@ -8,6 +8,7 @@
 #include "revision.h"
 #include "diffcore.h"
 
+int wt_status_relative_paths = 1;
 int wt_status_use_color = 0;
 static char wt_status_colors[][COLOR_MAXLEN] = {
 	"",         /* WT_STATUS_HEADER: normal */
@@ -400,6 +401,11 @@ int git_status_config(const char *k, const char *v)
 	if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) {
 		int slot = parse_status_slot(k, 13);
 		color_parse(v, k, wt_status_colors[slot]);
+		return 0;
+	}
+	if (!strcmp(k, "status.relativepaths")) {
+		wt_status_relative_paths = git_config_bool(k, v);
+		return 0;
 	}
 	return git_default_config(k, v);
 }

wt-status.h

@@ -28,6 +28,7 @@ struct wt_status {
 
 int git_status_config(const char *var, const char *value);
 int wt_status_use_color;
+int wt_status_relative_paths;
 void wt_status_prepare(struct wt_status *s);
 void wt_status_print(struct wt_status *s);