builtin/clean.c

   1 /*
   2  * "git clean" builtin command
   3  *
   4  * Copyright (C) 2007 Shawn Bohrer
   5  *
   6  * Based on git-clean.sh by Pavel Roskin
   7  */
   8
   9 #include "builtin.h"
  10 #include "cache.h"
  11 #include "config.h"
  12 #include "dir.h"
  13 #include "parse-options.h"
  14 #include "string-list.h"
  15 #include "quote.h"
  16 #include "column.h"
  17 #include "color.h"
  18 #include "pathspec.h"
  19
  20 static int force = -1; /* unset */
  21 static int interactive;
  22 static struct string_list del_list = STRING_LIST_INIT_DUP;
  23 static unsigned int colopts;
  24
  25 static const char *const builtin_clean_usage[] = {
  26         N_("git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <paths>..."),
  27         NULL
  28 };
  29
  30 static const char *msg_remove = N_("Removing %s\n");
  31 static const char *msg_would_remove = N_("Would remove %s\n");
  32 static const char *msg_skip_git_dir = N_("Skipping repository %s\n");
  33 static const char *msg_would_skip_git_dir = N_("Would skip repository %s\n");
  34 static const char *msg_warn_remove_failed = N_("failed to remove %s");
  35
  36 enum color_clean {
  37         CLEAN_COLOR_RESET = 0,
  38         CLEAN_COLOR_PLAIN = 1,
  39         CLEAN_COLOR_PROMPT = 2,
  40         CLEAN_COLOR_HEADER = 3,
  41         CLEAN_COLOR_HELP = 4,
  42         CLEAN_COLOR_ERROR = 5
  43 };
  44
  45 static int clean_use_color = -1;
  46 static char clean_colors[][COLOR_MAXLEN] = {
  47         [CLEAN_COLOR_ERROR] = GIT_COLOR_BOLD_RED,
  48         [CLEAN_COLOR_HEADER] = GIT_COLOR_BOLD,
  49         [CLEAN_COLOR_HELP] = GIT_COLOR_BOLD_RED,
  50         [CLEAN_COLOR_PLAIN] = GIT_COLOR_NORMAL,
  51         [CLEAN_COLOR_PROMPT] = GIT_COLOR_BOLD_BLUE,
  52         [CLEAN_COLOR_RESET] = GIT_COLOR_RESET,
  53 };
  54
  55 #define MENU_OPTS_SINGLETON             01
  56 #define MENU_OPTS_IMMEDIATE             02
  57 #define MENU_OPTS_LIST_ONLY             04
  58
  59 struct menu_opts {
  60         const char *header;
  61         const char *prompt;
  62         int flags;
  63 };
  64
  65 #define MENU_RETURN_NO_LOOP             10
  66
  67 struct menu_item {
  68         char hotkey;
  69         const char *title;
  70         int selected;
  71         int (*fn)(void);
  72 };
  73
  74 enum menu_stuff_type {
  75         MENU_STUFF_TYPE_STRING_LIST = 1,
  76         MENU_STUFF_TYPE_MENU_ITEM
  77 };
  78
  79 struct menu_stuff {
  80         enum menu_stuff_type type;
  81         int nr;
  82         void *stuff;
  83 };
  84
  85 static int parse_clean_color_slot(const char *var)
  86 {
  87         if (!strcasecmp(var, "reset"))
  88                 return CLEAN_COLOR_RESET;
  89         if (!strcasecmp(var, "plain"))
  90                 return CLEAN_COLOR_PLAIN;
  91         if (!strcasecmp(var, "prompt"))
  92                 return CLEAN_COLOR_PROMPT;
  93         if (!strcasecmp(var, "header"))
  94                 return CLEAN_COLOR_HEADER;
  95         if (!strcasecmp(var, "help"))
  96                 return CLEAN_COLOR_HELP;
  97         if (!strcasecmp(var, "error"))
  98                 return CLEAN_COLOR_ERROR;
  99         return -1;
 100 }
 101
 102 static int git_clean_config(const char *var, const char *value, void *cb)
 103 {
 104         const char *slot_name;
 105
 106         if (starts_with(var, "column."))
 107                 return git_column_config(var, value, "clean", &colopts);
 108
 109         /* honors the color.interactive* config variables which also
 110            applied in git-add--interactive and git-stash */
 111         if (!strcmp(var, "color.interactive")) {
 112                 clean_use_color = git_config_colorbool(var, value);
 113                 return 0;
 114         }
 115         if (skip_prefix(var, "color.interactive.", &slot_name)) {
 116                 int slot = parse_clean_color_slot(slot_name);
 117                 if (slot < 0)
 118                         return 0;
 119                 if (!value)
 120                         return config_error_nonbool(var);
 121                 return color_parse(value, clean_colors[slot]);
 122         }
 123
 124         if (!strcmp(var, "clean.requireforce")) {
 125                 force = !git_config_bool(var, value);
 126                 return 0;
 127         }
 128
 129         /* inspect the color.ui config variable and others */
 130         return git_color_default_config(var, value, cb);
 131 }
 132
 133 static const char *clean_get_color(enum color_clean ix)
 134 {
 135         if (want_color(clean_use_color))
 136                 return clean_colors[ix];
 137         return "";
 138 }
 139
 140 static void clean_print_color(enum color_clean ix)
 141 {
 142         printf("%s", clean_get_color(ix));
 143 }
 144
 145 static int exclude_cb(const struct option *opt, const char *arg, int unset)
 146 {
 147         struct string_list *exclude_list = opt->value;
 148         string_list_append(exclude_list, arg);
 149         return 0;
 150 }
 151
 152 static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 153                 int dry_run, int quiet, int *dir_gone)
 154 {
 155         DIR *dir;
 156         struct strbuf quoted = STRBUF_INIT;
 157         struct dirent *e;
 158         int res = 0, ret = 0, gone = 1, original_len = path->len, len;
 159         struct string_list dels = STRING_LIST_INIT_DUP;
 160
 161         *dir_gone = 1;
 162
 163         if ((force_flag & REMOVE_DIR_KEEP_NESTED_GIT) && is_nonbare_repository_dir(path)) {
 164                 if (!quiet) {
 165                         quote_path_relative(path->buf, prefix, &quoted);
 166                         printf(dry_run ?  _(msg_would_skip_git_dir) : _(msg_skip_git_dir),
 167                                         quoted.buf);
 168                 }
 169
 170                 *dir_gone = 0;
 171                 goto out;
 172         }
 173
 174         dir = opendir(path->buf);
 175         if (!dir) {
 176                 /* an empty dir could be removed even if it is unreadble */
 177                 res = dry_run ? 0 : rmdir(path->buf);
 178                 if (res) {
 179                         int saved_errno = errno;
 180                         quote_path_relative(path->buf, prefix, &quoted);
 181                         errno = saved_errno;
 182                         warning_errno(_(msg_warn_remove_failed), quoted.buf);
 183                         *dir_gone = 0;
 184                 }
 185                 ret = res;
 186                 goto out;
 187         }
 188
 189         strbuf_complete(path, '/');
 190
 191         len = path->len;
 192         while ((e = readdir(dir)) != NULL) {
 193                 struct stat st;
 194                 if (is_dot_or_dotdot(e->d_name))
 195                         continue;
 196
 197                 strbuf_setlen(path, len);
 198                 strbuf_addstr(path, e->d_name);
 199                 if (lstat(path->buf, &st))
 200                         ; /* fall thru */
 201                 else if (S_ISDIR(st.st_mode)) {
 202                         if (remove_dirs(path, prefix, force_flag, dry_run, quiet, &gone))
 203                                 ret = 1;
 204                         if (gone) {
 205                                 quote_path_relative(path->buf, prefix, &quoted);
 206                                 string_list_append(&dels, quoted.buf);
 207                         } else
 208                                 *dir_gone = 0;
 209                         continue;
 210                 } else {
 211                         res = dry_run ? 0 : unlink(path->buf);
 212                         if (!res) {
 213                                 quote_path_relative(path->buf, prefix, &quoted);
 214                                 string_list_append(&dels, quoted.buf);
 215                         } else {
 216                                 int saved_errno = errno;
 217                                 quote_path_relative(path->buf, prefix, &quoted);
 218                                 errno = saved_errno;
 219                                 warning_errno(_(msg_warn_remove_failed), quoted.buf);
 220                                 *dir_gone = 0;
 221                                 ret = 1;
 222                         }
 223                         continue;
 224                 }
 225
 226                 /* path too long, stat fails, or non-directory still exists */
 227                 *dir_gone = 0;
 228                 ret = 1;
 229                 break;
 230         }
 231         closedir(dir);
 232
 233         strbuf_setlen(path, original_len);
 234
 235         if (*dir_gone) {
 236                 res = dry_run ? 0 : rmdir(path->buf);
 237                 if (!res)
 238                         *dir_gone = 1;
 239                 else {
 240                         int saved_errno = errno;
 241                         quote_path_relative(path->buf, prefix, &quoted);
 242                         errno = saved_errno;
 243                         warning_errno(_(msg_warn_remove_failed), quoted.buf);
 244                         *dir_gone = 0;
 245                         ret = 1;
 246                 }
 247         }
 248
 249         if (!*dir_gone && !quiet) {
 250                 int i;
 251                 for (i = 0; i < dels.nr; i++)
 252                         printf(dry_run ?  _(msg_would_remove) : _(msg_remove), dels.items[i].string);
 253         }
 254 out:
 255         strbuf_release(&quoted);
 256         string_list_clear(&dels, 0);
 257         return ret;
 258 }
 259
 260 static void pretty_print_dels(void)
 261 {
 262         struct string_list list = STRING_LIST_INIT_DUP;
 263         struct string_list_item *item;
 264         struct strbuf buf = STRBUF_INIT;
 265         const char *qname;
 266         struct column_options copts;
 267
 268         for_each_string_list_item(item, &del_list) {
 269                 qname = quote_path_relative(item->string, NULL, &buf);
 270                 string_list_append(&list, qname);
 271         }
 272
 273         /*
 274          * always enable column display, we only consult column.*
 275          * about layout strategy and stuff
 276          */
 277         colopts = (colopts & ~COL_ENABLE_MASK) | COL_ENABLED;
 278         memset(&copts, 0, sizeof(copts));
 279         copts.indent = "  ";
 280         copts.padding = 2;
 281         print_columns(&list, colopts, &copts);
 282         strbuf_release(&buf);
 283         string_list_clear(&list, 0);
 284 }
 285
 286 static void pretty_print_menus(struct string_list *menu_list)
 287 {
 288         unsigned int local_colopts = 0;
 289         struct column_options copts;
 290
 291         local_colopts = COL_ENABLED | COL_ROW;
 292         memset(&copts, 0, sizeof(copts));
 293         copts.indent = "  ";
 294         copts.padding = 2;
 295         print_columns(menu_list, local_colopts, &copts);
 296 }
 297
 298 static void prompt_help_cmd(int singleton)
 299 {
 300         clean_print_color(CLEAN_COLOR_HELP);
 301         printf(singleton ?
 302                   _("Prompt help:\n"
 303                     "1          - select a numbered item\n"
 304                     "foo        - select item based on unique prefix\n"
 305                     "           - (empty) select nothing\n") :
 306                   _("Prompt help:\n"
 307                     "1          - select a single item\n"
 308                     "3-5        - select a range of items\n"
 309                     "2-3,6-9    - select multiple ranges\n"
 310                     "foo        - select item based on unique prefix\n"
 311                     "-...       - unselect specified items\n"
 312                     "*          - choose all items\n"
 313                     "           - (empty) finish selecting\n"));
 314         clean_print_color(CLEAN_COLOR_RESET);
 315 }
 316
 317 /*
 318  * display menu stuff with number prefix and hotkey highlight
 319  */
 320 static void print_highlight_menu_stuff(struct menu_stuff *stuff, int **chosen)
 321 {
 322         struct string_list menu_list = STRING_LIST_INIT_DUP;
 323         struct strbuf menu = STRBUF_INIT;
 324         struct menu_item *menu_item;
 325         struct string_list_item *string_list_item;
 326         int i;
 327
 328         switch (stuff->type) {
 329         default:
 330                 die("Bad type of menu_stuff when print menu");
 331         case MENU_STUFF_TYPE_MENU_ITEM:
 332                 menu_item = (struct menu_item *)stuff->stuff;
 333                 for (i = 0; i < stuff->nr; i++, menu_item++) {
 334                         const char *p;
 335                         int highlighted = 0;
 336
 337                         p = menu_item->title;
 338                         if ((*chosen)[i] < 0)
 339                                 (*chosen)[i] = menu_item->selected ? 1 : 0;
 340                         strbuf_addf(&menu, "%s%2d: ", (*chosen)[i] ? "*" : " ", i+1);
 341                         for (; *p; p++) {
 342                                 if (!highlighted && *p == menu_item->hotkey) {
 343                                         strbuf_addstr(&menu, clean_get_color(CLEAN_COLOR_PROMPT));
 344                                         strbuf_addch(&menu, *p);
 345                                         strbuf_addstr(&menu, clean_get_color(CLEAN_COLOR_RESET));
 346                                         highlighted = 1;
 347                                 } else {
 348                                         strbuf_addch(&menu, *p);
 349                                 }
 350                         }
 351                         string_list_append(&menu_list, menu.buf);
 352                         strbuf_reset(&menu);
 353                 }
 354                 break;
 355         case MENU_STUFF_TYPE_STRING_LIST:
 356                 i = 0;
 357                 for_each_string_list_item(string_list_item, (struct string_list *)stuff->stuff) {
 358                         if ((*chosen)[i] < 0)
 359                                 (*chosen)[i] = 0;
 360                         strbuf_addf(&menu, "%s%2d: %s",
 361                                     (*chosen)[i] ? "*" : " ", i+1, string_list_item->string);
 362                         string_list_append(&menu_list, menu.buf);
 363                         strbuf_reset(&menu);
 364                         i++;
 365                 }
 366                 break;
 367         }
 368
 369         pretty_print_menus(&menu_list);
 370
 371         strbuf_release(&menu);
 372         string_list_clear(&menu_list, 0);
 373 }
 374
 375 static int find_unique(const char *choice, struct menu_stuff *menu_stuff)
 376 {
 377         struct menu_item *menu_item;
 378         struct string_list_item *string_list_item;
 379         int i, len, found = 0;
 380
 381         len = strlen(choice);
 382         switch (menu_stuff->type) {
 383         default:
 384                 die("Bad type of menu_stuff when parse choice");
 385         case MENU_STUFF_TYPE_MENU_ITEM:
 386
 387                 menu_item = (struct menu_item *)menu_stuff->stuff;
 388                 for (i = 0; i < menu_stuff->nr; i++, menu_item++) {
 389                         if (len == 1 && *choice == menu_item->hotkey) {
 390                                 found = i + 1;
 391                                 break;
 392                         }
 393                         if (!strncasecmp(choice, menu_item->title, len)) {
 394                                 if (found) {
 395                                         if (len == 1) {
 396                                                 /* continue for hotkey matching */
 397                                                 found = -1;
 398                                         } else {
 399                                                 found = 0;
 400                                                 break;
 401                                         }
 402                                 } else {
 403                                         found = i + 1;
 404                                 }
 405                         }
 406                 }
 407                 break;
 408         case MENU_STUFF_TYPE_STRING_LIST:
 409                 string_list_item = ((struct string_list *)menu_stuff->stuff)->items;
 410                 for (i = 0; i < menu_stuff->nr; i++, string_list_item++) {
 411                         if (!strncasecmp(choice, string_list_item->string, len)) {
 412                                 if (found) {
 413                                         found = 0;
 414                                         break;
 415                                 }
 416                                 found = i + 1;
 417                         }
 418                 }
 419                 break;
 420         }
 421         return found;
 422 }
 423
 424
 425 /*
 426  * Parse user input, and return choice(s) for menu (menu_stuff).
 427  *
 428  * Input
 429  *     (for single choice)
 430  *         1          - select a numbered item
 431  *         foo        - select item based on menu title
 432  *                    - (empty) select nothing
 433  *
 434  *     (for multiple choice)
 435  *         1          - select a single item
 436  *         3-5        - select a range of items
 437  *         2-3,6-9    - select multiple ranges
 438  *         foo        - select item based on menu title
 439  *         -...       - unselect specified items
 440  *         *          - choose all items
 441  *                    - (empty) finish selecting
 442  *
 443  * The parse result will be saved in array **chosen, and
 444  * return number of total selections.
 445  */
 446 static int parse_choice(struct menu_stuff *menu_stuff,
 447                         int is_single,
 448                         struct strbuf input,
 449                         int **chosen)
 450 {
 451         struct strbuf **choice_list, **ptr;
 452         int nr = 0;
 453         int i;
 454
 455         if (is_single) {
 456                 choice_list = strbuf_split_max(&input, '\n', 0);
 457         } else {
 458                 char *p = input.buf;
 459                 do {
 460                         if (*p == ',')
 461                                 *p = ' ';
 462                 } while (*p++);
 463                 choice_list = strbuf_split_max(&input, ' ', 0);
 464         }
 465
 466         for (ptr = choice_list; *ptr; ptr++) {
 467                 char *p;
 468                 int choose = 1;
 469                 int bottom = 0, top = 0;
 470                 int is_range, is_number;
 471
 472                 strbuf_trim(*ptr);
 473                 if (!(*ptr)->len)
 474                         continue;
 475
 476                 /* Input that begins with '-'; unchoose */
 477                 if (*(*ptr)->buf == '-') {
 478                         choose = 0;
 479                         strbuf_remove((*ptr), 0, 1);
 480                 }
 481
 482                 is_range = 0;
 483                 is_number = 1;
 484                 for (p = (*ptr)->buf; *p; p++) {
 485                         if ('-' == *p) {
 486                                 if (!is_range) {
 487                                         is_range = 1;
 488                                         is_number = 0;
 489                                 } else {
 490                                         is_number = 0;
 491                                         is_range = 0;
 492                                         break;
 493                                 }
 494                         } else if (!isdigit(*p)) {
 495                                 is_number = 0;
 496                                 is_range = 0;
 497                                 break;
 498                         }
 499                 }
 500
 501                 if (is_number) {
 502                         bottom = atoi((*ptr)->buf);
 503                         top = bottom;
 504                 } else if (is_range) {
 505                         bottom = atoi((*ptr)->buf);
 506                         /* a range can be specified like 5-7 or 5- */
 507                         if (!*(strchr((*ptr)->buf, '-') + 1))
 508                                 top = menu_stuff->nr;
 509                         else
 510                                 top = atoi(strchr((*ptr)->buf, '-') + 1);
 511                 } else if (!strcmp((*ptr)->buf, "*")) {
 512                         bottom = 1;
 513                         top = menu_stuff->nr;
 514                 } else {
 515                         bottom = find_unique((*ptr)->buf, menu_stuff);
 516                         top = bottom;
 517                 }
 518
 519                 if (top <= 0 || bottom <= 0 || top > menu_stuff->nr || bottom > top ||
 520                     (is_single && bottom != top)) {
 521                         clean_print_color(CLEAN_COLOR_ERROR);
 522                         printf(_("Huh (%s)?\n"), (*ptr)->buf);
 523                         clean_print_color(CLEAN_COLOR_RESET);
 524                         continue;
 525                 }
 526
 527                 for (i = bottom; i <= top; i++)
 528                         (*chosen)[i-1] = choose;
 529         }
 530
 531         strbuf_list_free(choice_list);
 532
 533         for (i = 0; i < menu_stuff->nr; i++)
 534                 nr += (*chosen)[i];
 535         return nr;
 536 }
 537
 538 /*
 539  * Implement a git-add-interactive compatible UI, which is borrowed
 540  * from git-add--interactive.perl.
 541  *
 542  * Return value:
 543  *
 544  *   - Return an array of integers
 545  *   - , and it is up to you to free the allocated memory.
 546  *   - The array ends with EOF.
 547  *   - If user pressed CTRL-D (i.e. EOF), no selection returned.
 548  */
 549 static int *list_and_choose(struct menu_opts *opts, struct menu_stuff *stuff)
 550 {
 551         struct strbuf choice = STRBUF_INIT;
 552         int *chosen, *result;
 553         int nr = 0;
 554         int eof = 0;
 555         int i;
 556
 557         ALLOC_ARRAY(chosen, stuff->nr);
 558         /* set chosen as uninitialized */
 559         for (i = 0; i < stuff->nr; i++)
 560                 chosen[i] = -1;
 561
 562         for (;;) {
 563                 if (opts->header) {
 564                         printf_ln("%s%s%s",
 565                                   clean_get_color(CLEAN_COLOR_HEADER),
 566                                   _(opts->header),
 567                                   clean_get_color(CLEAN_COLOR_RESET));
 568                 }
 569
 570                 /* chosen will be initialized by print_highlight_menu_stuff */
 571                 print_highlight_menu_stuff(stuff, &chosen);
 572
 573                 if (opts->flags & MENU_OPTS_LIST_ONLY)
 574                         break;
 575
 576                 if (opts->prompt) {
 577                         printf("%s%s%s%s",
 578                                clean_get_color(CLEAN_COLOR_PROMPT),
 579                                _(opts->prompt),
 580                                opts->flags & MENU_OPTS_SINGLETON ? "> " : ">> ",
 581                                clean_get_color(CLEAN_COLOR_RESET));
 582                 }
 583
 584                 if (strbuf_getline_lf(&choice, stdin) != EOF) {
 585                         strbuf_trim(&choice);
 586                 } else {
 587                         eof = 1;
 588                         break;
 589                 }
 590
 591                 /* help for prompt */
 592                 if (!strcmp(choice.buf, "?")) {
 593                         prompt_help_cmd(opts->flags & MENU_OPTS_SINGLETON);
 594                         continue;
 595                 }
 596
 597                 /* for a multiple-choice menu, press ENTER (empty) will return back */
 598                 if (!(opts->flags & MENU_OPTS_SINGLETON) && !choice.len)
 599                         break;
 600
 601                 nr = parse_choice(stuff,
 602                                   opts->flags & MENU_OPTS_SINGLETON,
 603                                   choice,
 604                                   &chosen);
 605
 606                 if (opts->flags & MENU_OPTS_SINGLETON) {
 607                         if (nr)
 608                                 break;
 609                 } else if (opts->flags & MENU_OPTS_IMMEDIATE) {
 610                         break;
 611                 }
 612         }
 613
 614         if (eof) {
 615                 result = xmalloc(sizeof(int));
 616                 *result = EOF;
 617         } else {
 618                 int j = 0;
 619
 620                 /*
 621                  * recalculate nr, if return back from menu directly with
 622                  * default selections.
 623                  */
 624                 if (!nr) {
 625                         for (i = 0; i < stuff->nr; i++)
 626                                 nr += chosen[i];
 627                 }
 628
 629                 result = xcalloc(st_add(nr, 1), sizeof(int));
 630                 for (i = 0; i < stuff->nr && j < nr; i++) {
 631                         if (chosen[i])
 632                                 result[j++] = i;
 633                 }
 634                 result[j] = EOF;
 635         }
 636
 637         free(chosen);
 638         strbuf_release(&choice);
 639         return result;
 640 }
 641
 642 static int clean_cmd(void)
 643 {
 644         return MENU_RETURN_NO_LOOP;
 645 }
 646
 647 static int filter_by_patterns_cmd(void)
 648 {
 649         struct dir_struct dir;
 650         struct strbuf confirm = STRBUF_INIT;
 651         struct strbuf **ignore_list;
 652         struct string_list_item *item;
 653         struct exclude_list *el;
 654         int changed = -1, i;
 655
 656         for (;;) {
 657                 if (!del_list.nr)
 658                         break;
 659
 660                 if (changed)
 661                         pretty_print_dels();
 662
 663                 clean_print_color(CLEAN_COLOR_PROMPT);
 664                 printf(_("Input ignore patterns>> "));
 665                 clean_print_color(CLEAN_COLOR_RESET);
 666                 if (strbuf_getline_lf(&confirm, stdin) != EOF)
 667                         strbuf_trim(&confirm);
 668                 else
 669                         putchar('\n');
 670
 671                 /* quit filter_by_pattern mode if press ENTER or Ctrl-D */
 672                 if (!confirm.len)
 673                         break;
 674
 675                 memset(&dir, 0, sizeof(dir));
 676                 el = add_exclude_list(&dir, EXC_CMDL, "manual exclude");
 677                 ignore_list = strbuf_split_max(&confirm, ' ', 0);
 678
 679                 for (i = 0; ignore_list[i]; i++) {
 680                         strbuf_trim(ignore_list[i]);
 681                         if (!ignore_list[i]->len)
 682                                 continue;
 683
 684                         add_exclude(ignore_list[i]->buf, "", 0, el, -(i+1));
 685                 }
 686
 687                 changed = 0;
 688                 for_each_string_list_item(item, &del_list) {
 689                         int dtype = DT_UNKNOWN;
 690
 691                         if (is_excluded(&dir, &the_index, item->string, &dtype)) {
 692                                 *item->string = '\0';
 693                                 changed++;
 694                         }
 695                 }
 696
 697                 if (changed) {
 698                         string_list_remove_empty_items(&del_list, 0);
 699                 } else {
 700                         clean_print_color(CLEAN_COLOR_ERROR);
 701                         printf_ln(_("WARNING: Cannot find items matched by: %s"), confirm.buf);
 702                         clean_print_color(CLEAN_COLOR_RESET);
 703                 }
 704
 705                 strbuf_list_free(ignore_list);
 706                 clear_directory(&dir);
 707         }
 708
 709         strbuf_release(&confirm);
 710         return 0;
 711 }
 712
 713 static int select_by_numbers_cmd(void)
 714 {
 715         struct menu_opts menu_opts;
 716         struct menu_stuff menu_stuff;
 717         struct string_list_item *items;
 718         int *chosen;
 719         int i, j;
 720
 721         menu_opts.header = NULL;
 722         menu_opts.prompt = N_("Select items to delete");
 723         menu_opts.flags = 0;
 724
 725         menu_stuff.type = MENU_STUFF_TYPE_STRING_LIST;
 726         menu_stuff.stuff = &del_list;
 727         menu_stuff.nr = del_list.nr;
 728
 729         chosen = list_and_choose(&menu_opts, &menu_stuff);
 730         items = del_list.items;
 731         for (i = 0, j = 0; i < del_list.nr; i++) {
 732                 if (i < chosen[j]) {
 733                         *(items[i].string) = '\0';
 734                 } else if (i == chosen[j]) {
 735                         /* delete selected item */
 736                         j++;
 737                         continue;
 738                 } else {
 739                         /* end of chosen (chosen[j] == EOF), won't delete */
 740                         *(items[i].string) = '\0';
 741                 }
 742         }
 743
 744         string_list_remove_empty_items(&del_list, 0);
 745
 746         free(chosen);
 747         return 0;
 748 }
 749
 750 static int ask_each_cmd(void)
 751 {
 752         struct strbuf confirm = STRBUF_INIT;
 753         struct strbuf buf = STRBUF_INIT;
 754         struct string_list_item *item;
 755         const char *qname;
 756         int changed = 0, eof = 0;
 757
 758         for_each_string_list_item(item, &del_list) {
 759                 /* Ctrl-D should stop removing files */
 760                 if (!eof) {
 761                         qname = quote_path_relative(item->string, NULL, &buf);
 762                         /* TRANSLATORS: Make sure to keep [y/N] as is */
 763                         printf(_("Remove %s [y/N]? "), qname);
 764                         if (strbuf_getline_lf(&confirm, stdin) != EOF) {
 765                                 strbuf_trim(&confirm);
 766                         } else {
 767                                 putchar('\n');
 768                                 eof = 1;
 769                         }
 770                 }
 771                 if (!confirm.len || strncasecmp(confirm.buf, "yes", confirm.len)) {
 772                         *item->string = '\0';
 773                         changed++;
 774                 }
 775         }
 776
 777         if (changed)
 778                 string_list_remove_empty_items(&del_list, 0);
 779
 780         strbuf_release(&buf);
 781         strbuf_release(&confirm);
 782         return MENU_RETURN_NO_LOOP;
 783 }
 784
 785 static int quit_cmd(void)
 786 {
 787         string_list_clear(&del_list, 0);
 788         printf(_("Bye.\n"));
 789         return MENU_RETURN_NO_LOOP;
 790 }
 791
 792 static int help_cmd(void)
 793 {
 794         clean_print_color(CLEAN_COLOR_HELP);
 795         printf_ln(_(
 796                     "clean               - start cleaning\n"
 797                     "filter by pattern   - exclude items from deletion\n"
 798                     "select by numbers   - select items to be deleted by numbers\n"
 799                     "ask each            - confirm each deletion (like \"rm -i\")\n"
 800                     "quit                - stop cleaning\n"
 801                     "help                - this screen\n"
 802                     "?                   - help for prompt selection"
 803                    ));
 804         clean_print_color(CLEAN_COLOR_RESET);
 805         return 0;
 806 }
 807
 808 static void interactive_main_loop(void)
 809 {
 810         while (del_list.nr) {
 811                 struct menu_opts menu_opts;
 812                 struct menu_stuff menu_stuff;
 813                 struct menu_item menus[] = {
 814                         {'c', "clean",                  0, clean_cmd},
 815                         {'f', "filter by pattern",      0, filter_by_patterns_cmd},
 816                         {'s', "select by numbers",      0, select_by_numbers_cmd},
 817                         {'a', "ask each",               0, ask_each_cmd},
 818                         {'q', "quit",                   0, quit_cmd},
 819                         {'h', "help",                   0, help_cmd},
 820                 };
 821                 int *chosen;
 822
 823                 menu_opts.header = N_("*** Commands ***");
 824                 menu_opts.prompt = N_("What now");
 825                 menu_opts.flags = MENU_OPTS_SINGLETON;
 826
 827                 menu_stuff.type = MENU_STUFF_TYPE_MENU_ITEM;
 828                 menu_stuff.stuff = menus;
 829                 menu_stuff.nr = sizeof(menus) / sizeof(struct menu_item);
 830
 831                 clean_print_color(CLEAN_COLOR_HEADER);
 832                 printf_ln(Q_("Would remove the following item:",
 833                              "Would remove the following items:",
 834                              del_list.nr));
 835                 clean_print_color(CLEAN_COLOR_RESET);
 836
 837                 pretty_print_dels();
 838
 839                 chosen = list_and_choose(&menu_opts, &menu_stuff);
 840
 841                 if (*chosen != EOF) {
 842                         int ret;
 843                         ret = menus[*chosen].fn();
 844                         if (ret != MENU_RETURN_NO_LOOP) {
 845                                 FREE_AND_NULL(chosen);
 846                                 if (!del_list.nr) {
 847                                         clean_print_color(CLEAN_COLOR_ERROR);
 848                                         printf_ln(_("No more files to clean, exiting."));
 849                                         clean_print_color(CLEAN_COLOR_RESET);
 850                                         break;
 851                                 }
 852                                 continue;
 853                         }
 854                 } else {
 855                         quit_cmd();
 856                 }
 857
 858                 FREE_AND_NULL(chosen);
 859                 break;
 860         }
 861 }
 862
 863 static void correct_untracked_entries(struct dir_struct *dir)
 864 {
 865         int src, dst, ign;
 866
 867         for (src = dst = ign = 0; src < dir->nr; src++) {
 868                 /* skip paths in ignored[] that cannot be inside entries[src] */
 869                 while (ign < dir->ignored_nr &&
 870                        0 <= cmp_dir_entry(&dir->entries[src], &dir->ignored[ign]))
 871                         ign++;
 872
 873                 if (ign < dir->ignored_nr &&
 874                     check_dir_entry_contains(dir->entries[src], dir->ignored[ign])) {
 875                         /* entries[src] contains an ignored path, so we drop it */
 876                         free(dir->entries[src]);
 877                 } else {
 878                         struct dir_entry *ent = dir->entries[src++];
 879
 880                         /* entries[src] does not contain an ignored path, so we keep it */
 881                         dir->entries[dst++] = ent;
 882
 883                         /* then discard paths in entries[] contained inside entries[src] */
 884                         while (src < dir->nr &&
 885                                check_dir_entry_contains(ent, dir->entries[src]))
 886                                 free(dir->entries[src++]);
 887
 888                         /* compensate for the outer loop's loop control */
 889                         src--;
 890                 }
 891         }
 892         dir->nr = dst;
 893 }
 894
 895 int cmd_clean(int argc, const char **argv, const char *prefix)
 896 {
 897         int i, res;
 898         int dry_run = 0, remove_directories = 0, quiet = 0, ignored = 0;
 899         int ignored_only = 0, config_set = 0, errors = 0, gone = 1;
 900         int rm_flags = REMOVE_DIR_KEEP_NESTED_GIT;
 901         struct strbuf abs_path = STRBUF_INIT;
 902         struct dir_struct dir;
 903         struct pathspec pathspec;
 904         struct strbuf buf = STRBUF_INIT;
 905         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 906         struct exclude_list *el;
 907         struct string_list_item *item;
 908         const char *qname;
 909         struct option options[] = {
 910                 OPT__QUIET(&quiet, N_("do not print names of files removed")),
 911                 OPT__DRY_RUN(&dry_run, N_("dry run")),
 912                 OPT__FORCE(&force, N_("force")),
 913                 OPT_BOOL('i', "interactive", &interactive, N_("interactive cleaning")),
 914                 OPT_BOOL('d', NULL, &remove_directories,
 915                                 N_("remove whole directories")),
 916                 { OPTION_CALLBACK, 'e', "exclude", &exclude_list, N_("pattern"),
 917                   N_("add <pattern> to ignore rules"), PARSE_OPT_NONEG, exclude_cb },
 918                 OPT_BOOL('x', NULL, &ignored, N_("remove ignored files, too")),
 919                 OPT_BOOL('X', NULL, &ignored_only,
 920                                 N_("remove only ignored files")),
 921                 OPT_END()
 922         };
 923
 924         git_config(git_clean_config, NULL);
 925         if (force < 0)
 926                 force = 0;
 927         else
 928                 config_set = 1;
 929
 930         argc = parse_options(argc, argv, prefix, options, builtin_clean_usage,
 931                              0);
 932
 933         memset(&dir, 0, sizeof(dir));
 934         if (ignored_only)
 935                 dir.flags |= DIR_SHOW_IGNORED;
 936
 937         if (ignored && ignored_only)
 938                 die(_("-x and -X cannot be used together"));
 939
 940         if (!interactive && !dry_run && !force) {
 941                 if (config_set)
 942                         die(_("clean.requireForce set to true and neither -i, -n, nor -f given; "
 943                                   "refusing to clean"));
 944                 else
 945                         die(_("clean.requireForce defaults to true and neither -i, -n, nor -f given;"
 946                                   " refusing to clean"));
 947         }
 948
 949         if (force > 1)
 950                 rm_flags = 0;
 951
 952         dir.flags |= DIR_SHOW_OTHER_DIRECTORIES;
 953
 954         if (remove_directories)
 955                 dir.flags |= DIR_SHOW_IGNORED_TOO | DIR_KEEP_UNTRACKED_CONTENTS;
 956
 957         if (read_cache() < 0)
 958                 die(_("index file corrupt"));
 959
 960         if (!ignored)
 961                 setup_standard_excludes(&dir);
 962
 963         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 964         for (i = 0; i < exclude_list.nr; i++)
 965                 add_exclude(exclude_list.items[i].string, "", 0, el, -(i+1));
 966
 967         parse_pathspec(&pathspec, 0,
 968                        PATHSPEC_PREFER_CWD,
 969                        prefix, argv);
 970
 971         fill_directory(&dir, &the_index, &pathspec);
 972         correct_untracked_entries(&dir);
 973
 974         for (i = 0; i < dir.nr; i++) {
 975                 struct dir_entry *ent = dir.entries[i];
 976                 int matches = 0;
 977                 struct stat st;
 978                 const char *rel;
 979
 980                 if (!cache_name_is_other(ent->name, ent->len))
 981                         continue;
 982
 983                 if (pathspec.nr)
 984                         matches = dir_path_match(ent, &pathspec, 0, NULL);
 985
 986                 if (pathspec.nr && !matches)
 987                         continue;
 988
 989                 if (lstat(ent->name, &st))
 990                         die_errno("Cannot lstat '%s'", ent->name);
 991
 992                 if (S_ISDIR(st.st_mode) && !remove_directories &&
 993                     matches != MATCHED_EXACTLY)
 994                         continue;
 995
 996                 rel = relative_path(ent->name, prefix, &buf);
 997                 string_list_append(&del_list, rel);
 998         }
 999
1000         for (i = 0; i < dir.nr; i++)
1001                 free(dir.entries[i]);
1002
1003         for (i = 0; i < dir.ignored_nr; i++)
1004                 free(dir.ignored[i]);
1005
1006         if (interactive && del_list.nr > 0)
1007                 interactive_main_loop();
1008
1009         for_each_string_list_item(item, &del_list) {
1010                 struct stat st;
1011
1012                 if (prefix)
1013                         strbuf_addstr(&abs_path, prefix);
1014
1015                 strbuf_addstr(&abs_path, item->string);
1016
1017                 /*
1018                  * we might have removed this as part of earlier
1019                  * recursive directory removal, so lstat() here could
1020                  * fail with ENOENT.
1021                  */
1022                 if (lstat(abs_path.buf, &st))
1023                         continue;
1024
1025                 if (S_ISDIR(st.st_mode)) {
1026                         if (remove_dirs(&abs_path, prefix, rm_flags, dry_run, quiet, &gone))
1027                                 errors++;
1028                         if (gone && !quiet) {
1029                                 qname = quote_path_relative(item->string, NULL, &buf);
1030                                 printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
1031                         }
1032                 } else {
1033                         res = dry_run ? 0 : unlink(abs_path.buf);
1034                         if (res) {
1035                                 int saved_errno = errno;
1036                                 qname = quote_path_relative(item->string, NULL, &buf);
1037                                 errno = saved_errno;
1038                                 warning_errno(_(msg_warn_remove_failed), qname);
1039                                 errors++;
1040                         } else if (!quiet) {
1041                                 qname = quote_path_relative(item->string, NULL, &buf);
1042                                 printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
1043                         }
1044                 }
1045                 strbuf_reset(&abs_path);
1046         }
1047
1048         strbuf_release(&abs_path);
1049         strbuf_release(&buf);
1050         string_list_clear(&del_list, 0);
1051         string_list_clear(&exclude_list, 0);
1052         return (errors != 0);
1053 }