git-add: Add support for --refresh option.

This allows to refresh only a subset of the project files, based on
the specified pathspecs.

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 27 insertions, 1 deletions

diff --git a/builtin-add.c b/builtin-add.c
index de5c108f8f..82c806acf0 100644
--- a/builtin-add.c
+++ b/builtin-add.c
@@ -123,6 +123,23 @@ static void update(int verbose, const char **files)
 	run_diff_files(&rev, 0);
 }
 
+static void refresh(int verbose, const char **pathspec)
+{
+	char *seen;
+	int i, specs;
+
+	for (specs = 0; pathspec[specs];  specs++)
+		/* nothing */;
+	seen = xcalloc(specs, 1);
+	if (read_cache() < 0)
+		die("index file corrupt");
+	refresh_index(&the_index, verbose ? 0 : REFRESH_QUIET, pathspec, seen);
+	for (i = 0; i < specs; i++) {
+		if (!seen[i])
+			die("pathspec '%s' did not match any files", pathspec[i]);
+	}
+}
+
 static int git_add_config(const char *var, const char *value)
 {
 	if (!strcmp(var, "core.excludesfile")) {
@@ -143,7 +160,7 @@ static const char ignore_warning[] =
 int cmd_add(int argc, const char **argv, const char *prefix)
 {
 	int i, newfd;
-	int verbose = 0, show_only = 0, ignored_too = 0;
+	int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 	const char **pathspec;
 	struct dir_struct dir;
 	int add_interactive = 0;
@@ -191,6 +208,10 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 			take_worktree_changes = 1;
 			continue;
 		}
+		if (!strcmp(arg, "--refresh")) {
+			refresh_only = 1;
+			continue;
+		}
 		usage(builtin_add_usage);
 	}
 
@@ -206,6 +227,11 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	}
 	pathspec = get_pathspec(prefix, argv + i);
 
+	if (refresh_only) {
+		refresh(verbose, pathspec);
+		goto finish;
+	}
+
 	fill_directory(&dir, pathspec, ignored_too);
 
 	if (show_only) {