Merge branch 'jx/clean-interactive'
[git/git.git] / builtin / clean.c
index e344137..dba8387 100644 (file)
 #include "refs.h"
 #include "string-list.h"
 #include "quote.h"
+#include "column.h"
+#include "color.h"
 
 static int force = -1; /* unset */
+static int interactive;
+static struct string_list del_list = STRING_LIST_INIT_DUP;
+static unsigned int colopts;
 
 static const char *const builtin_clean_usage[] = {
-       N_("git clean [-d] [-f] [-n] [-q] [-e <pattern>] [-x | -X] [--] <paths>..."),
+       N_("git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <paths>..."),
        NULL
 };
 
@@ -27,11 +32,112 @@ static const char *msg_skip_git_dir = N_("Skipping repository %s\n");
 static const char *msg_would_skip_git_dir = N_("Would skip repository %s\n");
 static const char *msg_warn_remove_failed = N_("failed to remove %s");
 
+static int clean_use_color = -1;
+static char clean_colors[][COLOR_MAXLEN] = {
+       GIT_COLOR_RESET,
+       GIT_COLOR_NORMAL,       /* PLAIN */
+       GIT_COLOR_BOLD_BLUE,    /* PROMPT */
+       GIT_COLOR_BOLD,         /* HEADER */
+       GIT_COLOR_BOLD_RED,     /* HELP */
+       GIT_COLOR_BOLD_RED,     /* ERROR */
+};
+enum color_clean {
+       CLEAN_COLOR_RESET = 0,
+       CLEAN_COLOR_PLAIN = 1,
+       CLEAN_COLOR_PROMPT = 2,
+       CLEAN_COLOR_HEADER = 3,
+       CLEAN_COLOR_HELP = 4,
+       CLEAN_COLOR_ERROR = 5,
+};
+
+#define MENU_OPTS_SINGLETON            01
+#define MENU_OPTS_IMMEDIATE            02
+#define MENU_OPTS_LIST_ONLY            04
+
+struct menu_opts {
+       const char *header;
+       const char *prompt;
+       int flags;
+};
+
+#define MENU_RETURN_NO_LOOP            10
+
+struct menu_item {
+       char hotkey;
+       const char *title;
+       int selected;
+       int (*fn)();
+};
+
+enum menu_stuff_type {
+       MENU_STUFF_TYPE_STRING_LIST = 1,
+       MENU_STUFF_TYPE_MENU_ITEM
+};
+
+struct menu_stuff {
+       enum menu_stuff_type type;
+       int nr;
+       void *stuff;
+};
+
+static int parse_clean_color_slot(const char *var)
+{
+       if (!strcasecmp(var, "reset"))
+               return CLEAN_COLOR_RESET;
+       if (!strcasecmp(var, "plain"))
+               return CLEAN_COLOR_PLAIN;
+       if (!strcasecmp(var, "prompt"))
+               return CLEAN_COLOR_PROMPT;
+       if (!strcasecmp(var, "header"))
+               return CLEAN_COLOR_HEADER;
+       if (!strcasecmp(var, "help"))
+               return CLEAN_COLOR_HELP;
+       if (!strcasecmp(var, "error"))
+               return CLEAN_COLOR_ERROR;
+       return -1;
+}
+
 static int git_clean_config(const char *var, const char *value, void *cb)
 {
-       if (!strcmp(var, "clean.requireforce"))
+       if (!prefixcmp(var, "column."))
+               return git_column_config(var, value, "clean", &colopts);
+
+       /* honors the color.interactive* config variables which also
+          applied in git-add--interactive and git-stash */
+       if (!strcmp(var, "color.interactive")) {
+               clean_use_color = git_config_colorbool(var, value);
+               return 0;
+       }
+       if (!prefixcmp(var, "color.interactive.")) {
+               int slot = parse_clean_color_slot(var +
+                                                 strlen("color.interactive."));
+               if (slot < 0)
+                       return 0;
+               if (!value)
+                       return config_error_nonbool(var);
+               color_parse(value, var, clean_colors[slot]);
+               return 0;
+       }
+
+       if (!strcmp(var, "clean.requireforce")) {
                force = !git_config_bool(var, value);
-       return git_default_config(var, value, cb);
+               return 0;
+       }
+
+       /* inspect the color.ui config variable and others */
+       return git_color_default_config(var, value, cb);
+}
+
+static const char *clean_get_color(enum color_clean ix)
+{
+       if (want_color(clean_use_color))
+               return clean_colors[ix];
+       return "";
+}
+
+static void clean_print_color(enum color_clean ix)
+{
+       printf("%s", clean_get_color(ix));
 }
 
 static int exclude_cb(const struct option *opt, const char *arg, int unset)
@@ -56,7 +162,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
        if ((force_flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
                        !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
                if (!quiet) {
-                       quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
+                       quote_path_relative(path->buf, prefix, &quoted);
                        printf(dry_run ?  _(msg_would_skip_git_dir) : _(msg_skip_git_dir),
                                        quoted.buf);
                }
@@ -70,7 +176,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
                /* an empty dir could be removed even if it is unreadble */
                res = dry_run ? 0 : rmdir(path->buf);
                if (res) {
-                       quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
+                       quote_path_relative(path->buf, prefix, &quoted);
                        warning(_(msg_warn_remove_failed), quoted.buf);
                        *dir_gone = 0;
                }
@@ -94,7 +200,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
                        if (remove_dirs(path, prefix, force_flag, dry_run, quiet, &gone))
                                ret = 1;
                        if (gone) {
-                               quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
+                               quote_path_relative(path->buf, prefix, &quoted);
                                string_list_append(&dels, quoted.buf);
                        } else
                                *dir_gone = 0;
@@ -102,10 +208,10 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
                } else {
                        res = dry_run ? 0 : unlink(path->buf);
                        if (!res) {
-                               quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
+                               quote_path_relative(path->buf, prefix, &quoted);
                                string_list_append(&dels, quoted.buf);
                        } else {
-                               quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
+                               quote_path_relative(path->buf, prefix, &quoted);
                                warning(_(msg_warn_remove_failed), quoted.buf);
                                *dir_gone = 0;
                                ret = 1;
@@ -127,7 +233,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
                if (!res)
                        *dir_gone = 1;
                else {
-                       quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
+                       quote_path_relative(path->buf, prefix, &quoted);
                        warning(_(msg_warn_remove_failed), quoted.buf);
                        *dir_gone = 0;
                        ret = 1;
@@ -142,24 +248,609 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
        return ret;
 }
 
+static void pretty_print_dels(void)
+{
+       struct string_list list = STRING_LIST_INIT_DUP;
+       struct string_list_item *item;
+       struct strbuf buf = STRBUF_INIT;
+       const char *qname;
+       struct column_options copts;
+
+       for_each_string_list_item(item, &del_list) {
+               qname = quote_path_relative(item->string, NULL, &buf);
+               string_list_append(&list, qname);
+       }
+
+       /*
+        * always enable column display, we only consult column.*
+        * about layout strategy and stuff
+        */
+       colopts = (colopts & ~COL_ENABLE_MASK) | COL_ENABLED;
+       memset(&copts, 0, sizeof(copts));
+       copts.indent = "  ";
+       copts.padding = 2;
+       print_columns(&list, colopts, &copts);
+       strbuf_release(&buf);
+       string_list_clear(&list, 0);
+}
+
+static void pretty_print_menus(struct string_list *menu_list)
+{
+       unsigned int local_colopts = 0;
+       struct column_options copts;
+
+       local_colopts = COL_ENABLED | COL_ROW;
+       memset(&copts, 0, sizeof(copts));
+       copts.indent = "  ";
+       copts.padding = 2;
+       print_columns(menu_list, local_colopts, &copts);
+}
+
+static void prompt_help_cmd(int singleton)
+{
+       clean_print_color(CLEAN_COLOR_HELP);
+       printf_ln(singleton ?
+                 _("Prompt help:\n"
+                   "1          - select a numbered item\n"
+                   "foo        - select item based on unique prefix\n"
+                   "           - (empty) select nothing") :
+                 _("Prompt help:\n"
+                   "1          - select a single item\n"
+                   "3-5        - select a range of items\n"
+                   "2-3,6-9    - select multiple ranges\n"
+                   "foo        - select item based on unique prefix\n"
+                   "-...       - unselect specified items\n"
+                   "*          - choose all items\n"
+                   "           - (empty) finish selecting"));
+       clean_print_color(CLEAN_COLOR_RESET);
+}
+
+/*
+ * display menu stuff with number prefix and hotkey highlight
+ */
+static void print_highlight_menu_stuff(struct menu_stuff *stuff, int **chosen)
+{
+       struct string_list menu_list = STRING_LIST_INIT_DUP;
+       struct strbuf menu = STRBUF_INIT;
+       struct strbuf buf = STRBUF_INIT;
+       struct menu_item *menu_item;
+       struct string_list_item *string_list_item;
+       int i;
+
+       switch (stuff->type) {
+       default:
+               die("Bad type of menu_staff when print menu");
+       case MENU_STUFF_TYPE_MENU_ITEM:
+               menu_item = (struct menu_item *)stuff->stuff;
+               for (i = 0; i < stuff->nr; i++, menu_item++) {
+                       const char *p;
+                       int highlighted = 0;
+
+                       p = menu_item->title;
+                       if ((*chosen)[i] < 0)
+                               (*chosen)[i] = menu_item->selected ? 1 : 0;
+                       strbuf_addf(&menu, "%s%2d: ", (*chosen)[i] ? "*" : " ", i+1);
+                       for (; *p; p++) {
+                               if (!highlighted && *p == menu_item->hotkey) {
+                                       strbuf_addstr(&menu, clean_get_color(CLEAN_COLOR_PROMPT));
+                                       strbuf_addch(&menu, *p);
+                                       strbuf_addstr(&menu, clean_get_color(CLEAN_COLOR_RESET));
+                                       highlighted = 1;
+                               } else {
+                                       strbuf_addch(&menu, *p);
+                               }
+                       }
+                       string_list_append(&menu_list, menu.buf);
+                       strbuf_reset(&menu);
+               }
+               break;
+       case MENU_STUFF_TYPE_STRING_LIST:
+               i = 0;
+               for_each_string_list_item(string_list_item, (struct string_list *)stuff->stuff) {
+                       if ((*chosen)[i] < 0)
+                               (*chosen)[i] = 0;
+                       strbuf_addf(&menu, "%s%2d: %s",
+                                   (*chosen)[i] ? "*" : " ", i+1, string_list_item->string);
+                       string_list_append(&menu_list, menu.buf);
+                       strbuf_reset(&menu);
+                       i++;
+               }
+               break;
+       }
+
+       pretty_print_menus(&menu_list);
+
+       strbuf_release(&menu);
+       strbuf_release(&buf);
+       string_list_clear(&menu_list, 0);
+}
+
+/*
+ * Parse user input, and return choice(s) for menu (menu_stuff).
+ *
+ * Input
+ *     (for single choice)
+ *         1          - select a numbered item
+ *         foo        - select item based on menu title
+ *                    - (empty) select nothing
+ *
+ *     (for multiple choice)
+ *         1          - select a single item
+ *         3-5        - select a range of items
+ *         2-3,6-9    - select multiple ranges
+ *         foo        - select item based on menu title
+ *         -...       - unselect specified items
+ *         *          - choose all items
+ *                    - (empty) finish selecting
+ *
+ * The parse result will be saved in array **chosen, and
+ * return number of total selections.
+ */
+static int parse_choice(struct menu_stuff *menu_stuff,
+                       int is_single,
+                       struct strbuf input,
+                       int **chosen)
+{
+       struct strbuf **choice_list, **ptr;
+       struct menu_item *menu_item;
+       struct string_list_item *string_list_item;
+       int nr = 0;
+       int i;
+
+       if (is_single) {
+               choice_list = strbuf_split_max(&input, '\n', 0);
+       } else {
+               char *p = input.buf;
+               do {
+                       if (*p == ',')
+                               *p = ' ';
+               } while (*p++);
+               choice_list = strbuf_split_max(&input, ' ', 0);
+       }
+
+       for (ptr = choice_list; *ptr; ptr++) {
+               char *p;
+               int choose = 1;
+               int bottom = 0, top = 0;
+               int is_range, is_number;
+
+               strbuf_trim(*ptr);
+               if (!(*ptr)->len)
+                       continue;
+
+               /* Input that begins with '-'; unchoose */
+               if (*(*ptr)->buf == '-') {
+                       choose = 0;
+                       strbuf_remove((*ptr), 0, 1);
+               }
+
+               is_range = 0;
+               is_number = 1;
+               for (p = (*ptr)->buf; *p; p++) {
+                       if ('-' == *p) {
+                               if (!is_range) {
+                                       is_range = 1;
+                                       is_number = 0;
+                               } else {
+                                       is_number = 0;
+                                       is_range = 0;
+                                       break;
+                               }
+                       } else if (!isdigit(*p)) {
+                               is_number = 0;
+                               is_range = 0;
+                               break;
+                       }
+               }
+
+               if (is_number) {
+                       bottom = atoi((*ptr)->buf);
+                       top = bottom;
+               } else if (is_range) {
+                       bottom = atoi((*ptr)->buf);
+                       /* a range can be specified like 5-7 or 5- */
+                       if (!*(strchr((*ptr)->buf, '-') + 1))
+                               top = menu_stuff->nr;
+                       else
+                               top = atoi(strchr((*ptr)->buf, '-') + 1);
+               } else if (!strcmp((*ptr)->buf, "*")) {
+                       bottom = 1;
+                       top = menu_stuff->nr;
+               } else {
+                       switch (menu_stuff->type) {
+                       default:
+                               die("Bad type of menu_stuff when parse choice");
+                       case MENU_STUFF_TYPE_MENU_ITEM:
+                               menu_item = (struct menu_item *)menu_stuff->stuff;
+                               for (i = 0; i < menu_stuff->nr; i++, menu_item++) {
+                                       if (((*ptr)->len == 1 &&
+                                            *(*ptr)->buf == menu_item->hotkey) ||
+                                           !strcasecmp((*ptr)->buf, menu_item->title)) {
+                                               bottom = i + 1;
+                                               top = bottom;
+                                               break;
+                                       }
+                               }
+                               break;
+                       case MENU_STUFF_TYPE_STRING_LIST:
+                               string_list_item = ((struct string_list *)menu_stuff->stuff)->items;
+                               for (i = 0; i < menu_stuff->nr; i++, string_list_item++) {
+                                       if (!strcasecmp((*ptr)->buf, string_list_item->string)) {
+                                               bottom = i + 1;
+                                               top = bottom;
+                                               break;
+                                       }
+                               }
+                               break;
+                       }
+               }
+
+               if (top <= 0 || bottom <= 0 || top > menu_stuff->nr || bottom > top ||
+                   (is_single && bottom != top)) {
+                       clean_print_color(CLEAN_COLOR_ERROR);
+                       printf_ln(_("Huh (%s)?"), (*ptr)->buf);
+                       clean_print_color(CLEAN_COLOR_RESET);
+                       continue;
+               }
+
+               for (i = bottom; i <= top; i++)
+                       (*chosen)[i-1] = choose;
+       }
+
+       strbuf_list_free(choice_list);
+
+       for (i = 0; i < menu_stuff->nr; i++)
+               nr += (*chosen)[i];
+       return nr;
+}
+
+/*
+ * Implement a git-add-interactive compatible UI, which is borrowed
+ * from git-add--interactive.perl.
+ *
+ * Return value:
+ *
+ *   - Return an array of integers
+ *   - , and it is up to you to free the allocated memory.
+ *   - The array ends with EOF.
+ *   - If user pressed CTRL-D (i.e. EOF), no selection returned.
+ */
+static int *list_and_choose(struct menu_opts *opts, struct menu_stuff *stuff)
+{
+       struct strbuf choice = STRBUF_INIT;
+       int *chosen, *result;
+       int nr = 0;
+       int eof = 0;
+       int i;
+
+       chosen = xmalloc(sizeof(int) * stuff->nr);
+       /* set chosen as uninitialized */
+       for (i = 0; i < stuff->nr; i++)
+               chosen[i] = -1;
+
+       for (;;) {
+               if (opts->header) {
+                       printf_ln("%s%s%s",
+                                 clean_get_color(CLEAN_COLOR_HEADER),
+                                 _(opts->header),
+                                 clean_get_color(CLEAN_COLOR_RESET));
+               }
+
+               /* chosen will be initialized by print_highlight_menu_stuff */
+               print_highlight_menu_stuff(stuff, &chosen);
+
+               if (opts->flags & MENU_OPTS_LIST_ONLY)
+                       break;
+
+               if (opts->prompt) {
+                       printf("%s%s%s%s",
+                              clean_get_color(CLEAN_COLOR_PROMPT),
+                              _(opts->prompt),
+                              opts->flags & MENU_OPTS_SINGLETON ? "> " : ">> ",
+                              clean_get_color(CLEAN_COLOR_RESET));
+               }
+
+               if (strbuf_getline(&choice, stdin, '\n') != EOF) {
+                       strbuf_trim(&choice);
+               } else {
+                       eof = 1;
+                       break;
+               }
+
+               /* help for prompt */
+               if (!strcmp(choice.buf, "?")) {
+                       prompt_help_cmd(opts->flags & MENU_OPTS_SINGLETON);
+                       continue;
+               }
+
+               /* for a multiple-choice menu, press ENTER (empty) will return back */
+               if (!(opts->flags & MENU_OPTS_SINGLETON) && !choice.len)
+                       break;
+
+               nr = parse_choice(stuff,
+                                 opts->flags & MENU_OPTS_SINGLETON,
+                                 choice,
+                                 &chosen);
+
+               if (opts->flags & MENU_OPTS_SINGLETON) {
+                       if (nr)
+                               break;
+               } else if (opts->flags & MENU_OPTS_IMMEDIATE) {
+                       break;
+               }
+       }
+
+       if (eof) {
+               result = xmalloc(sizeof(int));
+               *result = EOF;
+       } else {
+               int j = 0;
+
+               /*
+                * recalculate nr, if return back from menu directly with
+                * default selections.
+                */
+               if (!nr) {
+                       for (i = 0; i < stuff->nr; i++)
+                               nr += chosen[i];
+               }
+
+               result = xmalloc(sizeof(int) * (nr + 1));
+               memset(result, 0, sizeof(int) * (nr + 1));
+               for (i = 0; i < stuff->nr && j < nr; i++) {
+                       if (chosen[i])
+                               result[j++] = i;
+               }
+               result[j] = EOF;
+       }
+
+       free(chosen);
+       strbuf_release(&choice);
+       return result;
+}
+
+static int clean_cmd(void)
+{
+       return MENU_RETURN_NO_LOOP;
+}
+
+static int filter_by_patterns_cmd(void)
+{
+       struct dir_struct dir;
+       struct strbuf confirm = STRBUF_INIT;
+       struct strbuf **ignore_list;
+       struct string_list_item *item;
+       struct exclude_list *el;
+       int changed = -1, i;
+
+       for (;;) {
+               if (!del_list.nr)
+                       break;
+
+               if (changed)
+                       pretty_print_dels();
+
+               clean_print_color(CLEAN_COLOR_PROMPT);
+               printf(_("Input ignore patterns>> "));
+               clean_print_color(CLEAN_COLOR_RESET);
+               if (strbuf_getline(&confirm, stdin, '\n') != EOF)
+                       strbuf_trim(&confirm);
+               else
+                       putchar('\n');
+
+               /* quit filter_by_pattern mode if press ENTER or Ctrl-D */
+               if (!confirm.len)
+                       break;
+
+               memset(&dir, 0, sizeof(dir));
+               el = add_exclude_list(&dir, EXC_CMDL, "manual exclude");
+               ignore_list = strbuf_split_max(&confirm, ' ', 0);
+
+               for (i = 0; ignore_list[i]; i++) {
+                       strbuf_trim(ignore_list[i]);
+                       if (!ignore_list[i]->len)
+                               continue;
+
+                       add_exclude(ignore_list[i]->buf, "", 0, el, -(i+1));
+               }
+
+               changed = 0;
+               for_each_string_list_item(item, &del_list) {
+                       int dtype = DT_UNKNOWN;
+
+                       if (is_excluded(&dir, item->string, &dtype)) {
+                               *item->string = '\0';
+                               changed++;
+                       }
+               }
+
+               if (changed) {
+                       string_list_remove_empty_items(&del_list, 0);
+               } else {
+                       clean_print_color(CLEAN_COLOR_ERROR);
+                       printf_ln(_("WARNING: Cannot find items matched by: %s"), confirm.buf);
+                       clean_print_color(CLEAN_COLOR_RESET);
+               }
+
+               strbuf_list_free(ignore_list);
+               clear_directory(&dir);
+       }
+
+       strbuf_release(&confirm);
+       return 0;
+}
+
+static int select_by_numbers_cmd(void)
+{
+       struct menu_opts menu_opts;
+       struct menu_stuff menu_stuff;
+       struct string_list_item *items;
+       int *chosen;
+       int i, j;
+
+       menu_opts.header = NULL;
+       menu_opts.prompt = N_("Select items to delete");
+       menu_opts.flags = 0;
+
+       menu_stuff.type = MENU_STUFF_TYPE_STRING_LIST;
+       menu_stuff.stuff = &del_list;
+       menu_stuff.nr = del_list.nr;
+
+       chosen = list_and_choose(&menu_opts, &menu_stuff);
+       items = del_list.items;
+       for (i = 0, j = 0; i < del_list.nr; i++) {
+               if (i < chosen[j]) {
+                       *(items[i].string) = '\0';
+               } else if (i == chosen[j]) {
+                       /* delete selected item */
+                       j++;
+                       continue;
+               } else {
+                       /* end of chosen (chosen[j] == EOF), won't delete */
+                       *(items[i].string) = '\0';
+               }
+       }
+
+       string_list_remove_empty_items(&del_list, 0);
+
+       free(chosen);
+       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);
+       printf_ln(_("Bye."));
+       return MENU_RETURN_NO_LOOP;
+}
+
+static int help_cmd(void)
+{
+       clean_print_color(CLEAN_COLOR_HELP);
+       printf_ln(_(
+                   "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"
+                  ));
+       clean_print_color(CLEAN_COLOR_RESET);
+       return 0;
+}
+
+static void interactive_main_loop(void)
+{
+       while (del_list.nr) {
+               struct menu_opts menu_opts;
+               struct menu_stuff menu_stuff;
+               struct menu_item menus[] = {
+                       {'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},
+               };
+               int *chosen;
+
+               menu_opts.header = N_("*** Commands ***");
+               menu_opts.prompt = N_("What now");
+               menu_opts.flags = MENU_OPTS_SINGLETON;
+
+               menu_stuff.type = MENU_STUFF_TYPE_MENU_ITEM;
+               menu_stuff.stuff = menus;
+               menu_stuff.nr = sizeof(menus) / sizeof(struct menu_item);
+
+               clean_print_color(CLEAN_COLOR_HEADER);
+               printf_ln(Q_("Would remove the following item:",
+                            "Would remove the following items:",
+                            del_list.nr));
+               clean_print_color(CLEAN_COLOR_RESET);
+
+               pretty_print_dels();
+
+               chosen = list_and_choose(&menu_opts, &menu_stuff);
+
+               if (*chosen != EOF) {
+                       int ret;
+                       ret = menus[*chosen].fn();
+                       if (ret != MENU_RETURN_NO_LOOP) {
+                               free(chosen);
+                               chosen = NULL;
+                               if (!del_list.nr) {
+                                       clean_print_color(CLEAN_COLOR_ERROR);
+                                       printf_ln(_("No more files to clean, exiting."));
+                                       clean_print_color(CLEAN_COLOR_RESET);
+                                       break;
+                               }
+                               continue;
+                       }
+               } else {
+                       quit_cmd();
+               }
+
+               free(chosen);
+               chosen = NULL;
+               break;
+       }
+}
+
 int cmd_clean(int argc, const char **argv, const char *prefix)
 {
        int i, res;
        int dry_run = 0, remove_directories = 0, quiet = 0, ignored = 0;
        int ignored_only = 0, config_set = 0, errors = 0, gone = 1;
        int rm_flags = REMOVE_DIR_KEEP_NESTED_GIT;
-       struct strbuf directory = STRBUF_INIT;
+       struct strbuf abs_path = STRBUF_INIT;
        struct dir_struct dir;
        static const char **pathspec;
        struct strbuf buf = STRBUF_INIT;
        struct string_list exclude_list = STRING_LIST_INIT_NODUP;
        struct exclude_list *el;
+       struct string_list_item *item;
        const char *qname;
        char *seen = NULL;
        struct option options[] = {
                OPT__QUIET(&quiet, N_("do not print names of files removed")),
                OPT__DRY_RUN(&dry_run, N_("dry run")),
                OPT__FORCE(&force, N_("force")),
+               OPT_BOOL('i', "interactive", &interactive, N_("interactive cleaning")),
                OPT_BOOLEAN('d', NULL, &remove_directories,
                                N_("remove whole directories")),
                { OPTION_CALLBACK, 'e', "exclude", &exclude_list, N_("pattern"),
@@ -186,12 +877,12 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
        if (ignored && ignored_only)
                die(_("-x and -X cannot be used together"));
 
-       if (!dry_run && !force) {
+       if (!interactive && !dry_run && !force) {
                if (config_set)
-                       die(_("clean.requireForce set to true and neither -n nor -f given; "
+                       die(_("clean.requireForce set to true and neither -i, -n nor -f given; "
                                  "refusing to clean"));
                else
-                       die(_("clean.requireForce defaults to true and neither -n nor -f given; "
+                       die(_("clean.requireForce defaults to true and neither -i, -n nor -f given; "
                                  "refusing to clean"));
        }
 
@@ -223,6 +914,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
                int matches = 0;
                const struct cache_entry *ce;
                struct stat st;
+               const char *rel;
 
                /*
                 * Remove the '/' at the end that directory
@@ -242,13 +934,8 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
                                continue; /* Yup, this one exists unmerged */
                }
 
-               /*
-                * we might have removed this as part of earlier
-                * recursive directory removal, so lstat() here could
-                * fail with ENOENT.
-                */
                if (lstat(ent->name, &st))
-                       continue;
+                       die_errno("Cannot lstat '%s'", ent->name);
 
                if (pathspec) {
                        memset(seen, 0, argc > 0 ? argc : 1);
@@ -257,33 +944,62 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
                }
 
                if (S_ISDIR(st.st_mode)) {
-                       strbuf_addstr(&directory, ent->name);
                        if (remove_directories || (matches == MATCHED_EXACTLY)) {
-                               if (remove_dirs(&directory, prefix, rm_flags, dry_run, quiet, &gone))
-                                       errors++;
-                               if (gone && !quiet) {
-                                       qname = quote_path_relative(directory.buf, directory.len, &buf, prefix);
-                                       printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
-                               }
+                               rel = relative_path(ent->name, prefix, &buf);
+                               string_list_append(&del_list, rel);
                        }
-                       strbuf_reset(&directory);
                } else {
                        if (pathspec && !matches)
                                continue;
-                       res = dry_run ? 0 : unlink(ent->name);
+                       rel = relative_path(ent->name, prefix, &buf);
+                       string_list_append(&del_list, rel);
+               }
+       }
+
+       if (interactive && del_list.nr > 0)
+               interactive_main_loop();
+
+       for_each_string_list_item(item, &del_list) {
+               struct stat st;
+
+               if (prefix)
+                       strbuf_addstr(&abs_path, prefix);
+
+               strbuf_addstr(&abs_path, item->string);
+
+               /*
+                * we might have removed this as part of earlier
+                * recursive directory removal, so lstat() here could
+                * fail with ENOENT.
+                */
+               if (lstat(abs_path.buf, &st))
+                       continue;
+
+               if (S_ISDIR(st.st_mode)) {
+                       if (remove_dirs(&abs_path, prefix, rm_flags, dry_run, quiet, &gone))
+                               errors++;
+                       if (gone && !quiet) {
+                               qname = quote_path_relative(item->string, NULL, &buf);
+                               printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
+                       }
+               } else {
+                       res = dry_run ? 0 : unlink(abs_path.buf);
                        if (res) {
-                               qname = quote_path_relative(ent->name, -1, &buf, prefix);
+                               qname = quote_path_relative(item->string, NULL, &buf);
                                warning(_(msg_warn_remove_failed), qname);
                                errors++;
                        } else if (!quiet) {
-                               qname = quote_path_relative(ent->name, -1, &buf, prefix);
+                               qname = quote_path_relative(item->string, NULL, &buf);
                                printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
                        }
                }
+               strbuf_reset(&abs_path);
        }
        free(seen);
 
-       strbuf_release(&directory);
+       strbuf_release(&abs_path);
+       strbuf_release(&buf);
+       string_list_clear(&del_list, 0);
        string_list_clear(&exclude_list, 0);
        return (errors != 0);
 }