[PATCH v6 6/7] git-clean: rm -i style interactive cleaning

[Jiang Xin <worldhello.net@gmail.com>]

Add a "rm -i" style interactive cleaning method. User must confirm one
by one before starting to delete.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
---
 builtin/clean.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/builtin/clean.c b/builtin/clean.c
index 3b07f..f36ad 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -659,6 +659,40 @@ int edit_by_numbers_cmd()
 	return 0;
 }
 
+int rm_i_cmd()
+{
+	struct strbuf confirm = STRBUF_INIT;
+	struct strbuf buf = STRBUF_INIT;
+	struct string_list_item *item;
+	const char *qname;
+	int changed = 0, eof = 0;
+
+	for_each_string_list_item(item, &del_list) {
+		/* Ctrl-D should stop removing files */
+		if (!eof) {
+			qname = quote_path_relative(item->string, -1, &buf, *the_prefix);
+			printf(_("remove %s ? "), qname);
+			if (strbuf_getline(&confirm, stdin, '\n') != EOF) {
+				strbuf_trim(&confirm);
+			} else {
+				putchar('\n');
+				eof = 1;
+			}
+		}
+		if (!confirm.len || !strncasecmp(confirm.buf, "no", confirm.len)) {
+			*item->string = '\0';
+			changed++;
+		}
+	}
+
+	if (changed)
+		string_list_remove_empty_items(&del_list, 0);
+
+	strbuf_release(&buf);
+	strbuf_release(&confirm);
+	return MENU_RETURN_NO_LOOP;
+}
+
 int quit_cmd()
 {
 	string_list_clear(&del_list, 0);
@@ -673,6 +707,7 @@ int help_cmd(int x)
 		    "clean            - start cleaning\n"
 		    "edit by patterns - exclude items from deletion\n"
 		    "edit by numbers  - select items to be deleted by numbers\n"
+		    "rm -i            - delete items one by one, like \"rm -i\"\n"
 		    "quit             - stop cleaning\n"
 		    "help             - this screen\n"
 		    "?                - help for prompt selection"
@@ -691,6 +726,7 @@ void interactive_main_loop()
 			{'c', "clean",			clean_cmd},
 			{'p', "edit by patterns",	edit_by_patterns_cmd},
 			{'n', "edit by numbers",	edit_by_numbers_cmd},
+			{'i', "rm -i",			rm_i_cmd},
 			{'q', "quit",			quit_cmd},
 			{'h', "help",			help_cmd},
 		};
-- 
1.8.3.rc1.338.gb35aa5d