Add a new action for interactive git-clean: ask each. It's just like
the "rm -i" command, that the user must confirm one by one for each
file or directory to be cleaned.

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

diff --git a/builtin/clean.c b/builtin/clean.c
index 037cc..44378 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -717,6 +717,40 @@ static int select_by_numbers_cmd(void)
        return 0;
 }
 
+static int ask_each_cmd(void)
+{
+       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, NULL, &buf);
+                       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, "yes", 
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;
+}
+
 static int quit_cmd(void)
 {
        string_list_clear(&del_list, 0);
@@ -731,6 +765,7 @@ static int help_cmd(void)
                    "clean               - start cleaning\n"
                    "filter by pattern   - exclude items from deletion\n"
                    "select by numbers   - select items to be deleted by 
numbers\n"
+                   "ask each            - confirm each deletion (like \"rm 
-i\")\n"
                    "quit                - stop cleaning\n"
                    "help                - this screen\n"
                    "?                   - help for prompt selection"
@@ -748,6 +783,7 @@ static void interactive_main_loop(void)
                        {'c', "clean",                  0, clean_cmd},
                        {'f', "filter by pattern",      0, 
filter_by_patterns_cmd},
                        {'s', "select by numbers",      0, 
select_by_numbers_cmd},
+                       {'a', "ask each",               0, ask_each_cmd},
                        {'q', "quit",                   0, quit_cmd},
                        {'h', "help",                   0, help_cmd},
                };
-- 
1.8.3.rc2.380.g956c2b2

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