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 #define USE_THE_INDEX_COMPATIBILITY_MACROS
  10 #include "builtin.h"
  11 #include "cache.h"
  12 #include "config.h"
  13 #include "dir.h"
  14 #include "parse-options.h"
  15 #include "string-list.h"
  16 #include "quote.h"
  17 #include "column.h"
  18 #include "color.h"
  19 #include "pathspec.h"
  20 #include "help.h"
  21 #include "prompt.h"
  22
  23 static int force = -1; /* unset */
  24 static int interactive;
  25 static struct string_list del_list = STRING_LIST_INIT_DUP;
  26 static unsigned int colopts;
  27
  28 static const char *const builtin_clean_usage[] = {
  29         N_("git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <paths>..."),
  30         NULL
  31 };
  32
  33 static const char *msg_remove = N_("Removing %s\n");
  34 static const char *msg_would_remove = N_("Would remove %s\n");
  35 static const char *msg_skip_git_dir = N_("Skipping repository %s\n");
  36 static const char *msg_would_skip_git_dir = N_("Would skip repository %s\n");
  37 static const char *msg_warn_remove_failed = N_("failed to remove %s");
  38 static const char *msg_warn_lstat_failed = N_("could not lstat %s\n");
  39
  40 enum color_clean {
  41         CLEAN_COLOR_RESET = 0,
  42         CLEAN_COLOR_PLAIN = 1,
  43         CLEAN_COLOR_PROMPT = 2,
  44         CLEAN_COLOR_HEADER = 3,
  45         CLEAN_COLOR_HELP = 4,
  46         CLEAN_COLOR_ERROR = 5
  47 };
  48
  49 static const char *color_interactive_slots[] = {
  50         [CLEAN_COLOR_ERROR]  = "error",
  51         [CLEAN_COLOR_HEADER] = "header",
  52         [CLEAN_COLOR_HELP]   = "help",
  53         [CLEAN_COLOR_PLAIN]  = "plain",
  54         [CLEAN_COLOR_PROMPT] = "prompt",
  55         [CLEAN_COLOR_RESET]  = "reset",
  56 };
  57
  58 static int clean_use_color = -1;
  59 static char clean_colors[][COLOR_MAXLEN] = {
  60         [CLEAN_COLOR_ERROR] = GIT_COLOR_BOLD_RED,
  61         [CLEAN_COLOR_HEADER] = GIT_COLOR_BOLD,
  62         [CLEAN_COLOR_HELP] = GIT_COLOR_BOLD_RED,
  63         [CLEAN_COLOR_PLAIN] = GIT_COLOR_NORMAL,
  64         [CLEAN_COLOR_PROMPT] = GIT_COLOR_BOLD_BLUE,
  65         [CLEAN_COLOR_RESET] = GIT_COLOR_RESET,
  66 };
  67
  68 #define MENU_OPTS_SINGLETON             01
  69 #define MENU_OPTS_IMMEDIATE             02
  70 #define MENU_OPTS_LIST_ONLY             04
  71
  72 struct menu_opts {
  73         const char *header;
  74         const char *prompt;
  75         int flags;
  76 };
  77
  78 #define MENU_RETURN_NO_LOOP             10
  79
  80 struct menu_item {
  81         char hotkey;
  82         const char *title;
  83         int selected;
  84         int (*fn)(void);
  85 };
  86
  87 enum menu_stuff_type {
  88         MENU_STUFF_TYPE_STRING_LIST = 1,
  89         MENU_STUFF_TYPE_MENU_ITEM
  90 };
  91
  92 struct menu_stuff {
  93         enum menu_stuff_type type;
  94         int nr;
  95         void *stuff;
  96 };
  97
  98 define_list_config_array(color_interactive_slots);
  99
 100 static int git_clean_config(const char *var, const char *value, void *cb)
 101 {
 102         const char *slot_name;
 103
 104         if (starts_with(var, "column."))
 105                 return git_column_config(var, value, "clean", &colopts);
 106
 107         /* honors the color.interactive* config variables which also
 108            applied in git-add--interactive and git-stash */
 109         if (!strcmp(var, "color.interactive")) {
 110                 clean_use_color = git_config_colorbool(var, value);
 111                 return 0;
 112         }
 113         if (skip_prefix(var, "color.interactive.", &slot_name)) {
 114                 int slot = LOOKUP_CONFIG(color_interactive_slots, slot_name);
 115                 if (slot < 0)
 116                         return 0;
 117                 if (!value)
 118                         return config_error_nonbool(var);
 119                 return color_parse(value, clean_colors[slot]);
 120         }
 121
 122         if (!strcmp(var, "clean.requireforce")) {
 123                 force = !git_config_bool(var, value);
 124                 return 0;
 125         }
 126
 127         /* inspect the color.ui config variable and others */
 128         return git_color_default_config(var, value, cb);
 129 }
 130
 131 static const char *clean_get_color(enum color_clean ix)
 132 {
 133         if (want_color(clean_use_color))
 134                 return clean_colors[ix];
 135         return "";
 136 }
 137
 138 static void clean_print_color(enum color_clean ix)
 139 {
 140         printf("%s", clean_get_color(ix));
 141 }
 142
 143 static int exclude_cb(const struct option *opt, const char *arg, int unset)
 144 {
 145         struct string_list *exclude_list = opt->value;
 146         BUG_ON_OPT_NEG(unset);
 147         string_list_append(exclude_list, arg);
 148         return 0;
 149 }
 150
 151 static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 152                 int dry_run, int quiet, int *dir_gone)
 153 {
 154         DIR *dir;
 155         struct strbuf quoted = STRBUF_INIT;
 156         struct dirent *e;
 157         int res = 0, ret = 0, gone = 1, original_len = path->len, len;
 158         struct string_list dels = STRING_LIST_INIT_DUP;
 159
 160         *dir_gone = 1;
 161
 162         if ((force_flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
 163             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                         warning_errno(_(msg_warn_lstat_failed), path->buf);
 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  * Parse user input, and return choice(s) for menu (menu_stuff).
 426  *
 427  * Input
 428  *     (for single choice)
 429  *         1          - select a numbered item
 430  *         foo        - select item based on menu title
 431  *                    - (empty) select nothing
 432  *
 433  *     (for multiple choice)
 434  *         1          - select a single item
 435  *         3-5        - select a range of items
 436  *         2-3,6-9    - select multiple ranges
 437  *         foo        - select item based on menu title
 438  *         -...       - unselect specified items
 439  *         *          - choose all items
 440  *                    - (empty) finish selecting
 441  *
 442  * The parse result will be saved in array **chosen, and
 443  * return number of total selections.
 444  */
 445 static int parse_choice(struct menu_stuff *menu_stuff,
 446                         int is_single,
 447                         struct strbuf input,
 448                         int **chosen)
 449 {
 450         struct strbuf **choice_list, **ptr;
 451         int nr = 0;
 452         int i;
 453
 454         if (is_single) {
 455                 choice_list = strbuf_split_max(&input, '\n', 0);
 456         } else {
 457                 char *p = input.buf;
 458                 do {
 459                         if (*p == ',')
 460                                 *p = ' ';
 461                 } while (*p++);
 462                 choice_list = strbuf_split_max(&input, ' ', 0);
 463         }
 464
 465         for (ptr = choice_list; *ptr; ptr++) {
 466                 char *p;
 467                 int choose = 1;
 468                 int bottom = 0, top = 0;
 469                 int is_range, is_number;
 470
 471                 strbuf_trim(*ptr);
 472                 if (!(*ptr)->len)
 473                         continue;
 474
 475                 /* Input that begins with '-'; unchoose */
 476                 if (*(*ptr)->buf == '-') {
 477                         choose = 0;
 478                         strbuf_remove((*ptr), 0, 1);
 479                 }
 480
 481                 is_range = 0;
 482                 is_number = 1;
 483                 for (p = (*ptr)->buf; *p; p++) {
 484                         if ('-' == *p) {
 485                                 if (!is_range) {
 486                                         is_range = 1;
 487                                         is_number = 0;
 488                                 } else {
 489                                         is_number = 0;
 490                                         is_range = 0;
 491                                         break;
 492                                 }
 493                         } else if (!isdigit(*p)) {
 494                                 is_number = 0;
 495                                 is_range = 0;
 496                                 break;
 497                         }
 498                 }
 499
 500                 if (is_number) {
 501                         bottom = atoi((*ptr)->buf);
 502                         top = bottom;
 503                 } else if (is_range) {
 504                         bottom = atoi((*ptr)->buf);
 505                         /* a range can be specified like 5-7 or 5- */
 506                         if (!*(strchr((*ptr)->buf, '-') + 1))
 507                                 top = menu_stuff->nr;
 508                         else
 509                                 top = atoi(strchr((*ptr)->buf, '-') + 1);
 510                 } else if (!strcmp((*ptr)->buf, "*")) {
 511                         bottom = 1;
 512                         top = menu_stuff->nr;
 513                 } else {
 514                         bottom = find_unique((*ptr)->buf, menu_stuff);
 515                         top = bottom;
 516                 }
 517
 518                 if (top <= 0 || bottom <= 0 || top > menu_stuff->nr || bottom > top ||
 519                     (is_single && bottom != top)) {
 520                         clean_print_color(CLEAN_COLOR_ERROR);
 521                         printf(_("Huh (%s)?\n"), (*ptr)->buf);
 522                         clean_print_color(CLEAN_COLOR_RESET);
 523                         continue;
 524                 }
 525
 526                 for (i = bottom; i <= top; i++)
 527                         (*chosen)[i-1] = choose;
 528         }
 529
 530         strbuf_list_free(choice_list);
 531
 532         for (i = 0; i < menu_stuff->nr; i++)
 533                 nr += (*chosen)[i];
 534         return nr;
 535 }
 536
 537 /*
 538  * Implement a git-add-interactive compatible UI, which is borrowed
 539  * from git-add--interactive.perl.
 540  *
 541  * Return value:
 542  *
 543  *   - Return an array of integers
 544  *   - , and it is up to you to free the allocated memory.
 545  *   - The array ends with EOF.
 546  *   - If user pressed CTRL-D (i.e. EOF), no selection returned.
 547  */
 548 static int *list_and_choose(struct menu_opts *opts, struct menu_stuff *stuff)
 549 {
 550         struct strbuf choice = STRBUF_INIT;
 551         int *chosen, *result;
 552         int nr = 0;
 553         int eof = 0;
 554         int i;
 555
 556         ALLOC_ARRAY(chosen, stuff->nr);
 557         /* set chosen as uninitialized */
 558         for (i = 0; i < stuff->nr; i++)
 559                 chosen[i] = -1;
 560
 561         for (;;) {
 562                 if (opts->header) {
 563                         printf_ln("%s%s%s",
 564                                   clean_get_color(CLEAN_COLOR_HEADER),
 565                                   _(opts->header),
 566                                   clean_get_color(CLEAN_COLOR_RESET));
 567                 }
 568
 569                 /* chosen will be initialized by print_highlight_menu_stuff */
 570                 print_highlight_menu_stuff(stuff, &chosen);
 571
 572                 if (opts->flags & MENU_OPTS_LIST_ONLY)
 573                         break;
 574
 575                 if (opts->prompt) {
 576                         printf("%s%s%s%s",
 577                                clean_get_color(CLEAN_COLOR_PROMPT),
 578                                _(opts->prompt),
 579                                opts->flags & MENU_OPTS_SINGLETON ? "> " : ">> ",
 580                                clean_get_color(CLEAN_COLOR_RESET));
 581                 }
 582
 583                 if (git_read_line_interactively(&choice) == EOF) {
 584                         eof = 1;
 585                         break;
 586                 }
 587
 588                 /* help for prompt */
 589                 if (!strcmp(choice.buf, "?")) {
 590                         prompt_help_cmd(opts->flags & MENU_OPTS_SINGLETON);
 591                         continue;
 592                 }
 593
 594                 /* for a multiple-choice menu, press ENTER (empty) will return back */
 595                 if (!(opts->flags & MENU_OPTS_SINGLETON) && !choice.len)
 596                         break;
 597
 598                 nr = parse_choice(stuff,
 599                                   opts->flags & MENU_OPTS_SINGLETON,
 600                                   choice,
 601                                   &chosen);
 602
 603                 if (opts->flags & MENU_OPTS_SINGLETON) {
 604                         if (nr)
 605                                 break;
 606                 } else if (opts->flags & MENU_OPTS_IMMEDIATE) {
 607                         break;
 608                 }
 609         }
 610
 611         if (eof) {
 612                 result = xmalloc(sizeof(int));
 613                 *result = EOF;
 614         } else {
 615                 int j = 0;
 616
 617                 /*
 618                  * recalculate nr, if return back from menu directly with
 619                  * default selections.
 620                  */
 621                 if (!nr) {
 622                         for (i = 0; i < stuff->nr; i++)
 623                                 nr += chosen[i];
 624                 }
 625
 626                 result = xcalloc(st_add(nr, 1), sizeof(int));
 627                 for (i = 0; i < stuff->nr && j < nr; i++) {
 628                         if (chosen[i])
 629                                 result[j++] = i;
 630                 }
 631                 result[j] = EOF;
 632         }
 633
 634         free(chosen);
 635         strbuf_release(&choice);
 636         return result;
 637 }
 638
 639 static int clean_cmd(void)
 640 {
 641         return MENU_RETURN_NO_LOOP;
 642 }
 643
 644 static int filter_by_patterns_cmd(void)
 645 {
 646         struct dir_struct dir;
 647         struct strbuf confirm = STRBUF_INIT;
 648         struct strbuf **ignore_list;
 649         struct string_list_item *item;
 650         struct pattern_list *pl;
 651         int changed = -1, i;
 652
 653         for (;;) {
 654                 if (!del_list.nr)
 655                         break;
 656
 657                 if (changed)
 658                         pretty_print_dels();
 659
 660                 clean_print_color(CLEAN_COLOR_PROMPT);
 661                 printf(_("Input ignore patterns>> "));
 662                 clean_print_color(CLEAN_COLOR_RESET);
 663                 if (git_read_line_interactively(&confirm) == EOF)
 664                         putchar('\n');
 665
 666                 /* quit filter_by_pattern mode if press ENTER or Ctrl-D */
 667                 if (!confirm.len)
 668                         break;
 669
 670                 memset(&dir, 0, sizeof(dir));
 671                 pl = add_pattern_list(&dir, EXC_CMDL, "manual exclude");
 672                 ignore_list = strbuf_split_max(&confirm, ' ', 0);
 673
 674                 for (i = 0; ignore_list[i]; i++) {
 675                         strbuf_trim(ignore_list[i]);
 676                         if (!ignore_list[i]->len)
 677                                 continue;
 678
 679                         add_pattern(ignore_list[i]->buf, "", 0, pl, -(i+1));
 680                 }
 681
 682                 changed = 0;
 683                 for_each_string_list_item(item, &del_list) {
 684                         int dtype = DT_UNKNOWN;
 685
 686                         if (is_excluded(&dir, &the_index, item->string, &dtype)) {
 687                                 *item->string = '\0';
 688                                 changed++;
 689                         }
 690                 }
 691
 692                 if (changed) {
 693                         string_list_remove_empty_items(&del_list, 0);
 694                 } else {
 695                         clean_print_color(CLEAN_COLOR_ERROR);
 696                         printf_ln(_("WARNING: Cannot find items matched by: %s"), confirm.buf);
 697                         clean_print_color(CLEAN_COLOR_RESET);
 698                 }
 699
 700                 strbuf_list_free(ignore_list);
 701                 clear_directory(&dir);
 702         }
 703
 704         strbuf_release(&confirm);
 705         return 0;
 706 }
 707
 708 static int select_by_numbers_cmd(void)
 709 {
 710         struct menu_opts menu_opts;
 711         struct menu_stuff menu_stuff;
 712         struct string_list_item *items;
 713         int *chosen;
 714         int i, j;
 715
 716         menu_opts.header = NULL;
 717         menu_opts.prompt = N_("Select items to delete");
 718         menu_opts.flags = 0;
 719
 720         menu_stuff.type = MENU_STUFF_TYPE_STRING_LIST;
 721         menu_stuff.stuff = &del_list;
 722         menu_stuff.nr = del_list.nr;
 723
 724         chosen = list_and_choose(&menu_opts, &menu_stuff);
 725         items = del_list.items;
 726         for (i = 0, j = 0; i < del_list.nr; i++) {
 727                 if (i < chosen[j]) {
 728                         *(items[i].string) = '\0';
 729                 } else if (i == chosen[j]) {
 730                         /* delete selected item */
 731                         j++;
 732                         continue;
 733                 } else {
 734                         /* end of chosen (chosen[j] == EOF), won't delete */
 735                         *(items[i].string) = '\0';
 736                 }
 737         }
 738
 739         string_list_remove_empty_items(&del_list, 0);
 740
 741         free(chosen);
 742         return 0;
 743 }
 744
 745 static int ask_each_cmd(void)
 746 {
 747         struct strbuf confirm = STRBUF_INIT;
 748         struct strbuf buf = STRBUF_INIT;
 749         struct string_list_item *item;
 750         const char *qname;
 751         int changed = 0, eof = 0;
 752
 753         for_each_string_list_item(item, &del_list) {
 754                 /* Ctrl-D should stop removing files */
 755                 if (!eof) {
 756                         qname = quote_path_relative(item->string, NULL, &buf);
 757                         /* TRANSLATORS: Make sure to keep [y/N] as is */
 758                         printf(_("Remove %s [y/N]? "), qname);
 759                         if (git_read_line_interactively(&confirm) == EOF) {
 760                                 putchar('\n');
 761                                 eof = 1;
 762                         }
 763                 }
 764                 if (!confirm.len || strncasecmp(confirm.buf, "yes", confirm.len)) {
 765                         *item->string = '\0';
 766                         changed++;
 767                 }
 768         }
 769
 770         if (changed)
 771                 string_list_remove_empty_items(&del_list, 0);
 772
 773         strbuf_release(&buf);
 774         strbuf_release(&confirm);
 775         return MENU_RETURN_NO_LOOP;
 776 }
 777
 778 static int quit_cmd(void)
 779 {
 780         string_list_clear(&del_list, 0);
 781         printf(_("Bye.\n"));
 782         return MENU_RETURN_NO_LOOP;
 783 }
 784
 785 static int help_cmd(void)
 786 {
 787         clean_print_color(CLEAN_COLOR_HELP);
 788         printf_ln(_(
 789                     "clean               - start cleaning\n"
 790                     "filter by pattern   - exclude items from deletion\n"
 791                     "select by numbers   - select items to be deleted by numbers\n"
 792                     "ask each            - confirm each deletion (like \"rm -i\")\n"
 793                     "quit                - stop cleaning\n"
 794                     "help                - this screen\n"
 795                     "?                   - help for prompt selection"
 796                    ));
 797         clean_print_color(CLEAN_COLOR_RESET);
 798         return 0;
 799 }
 800
 801 static void interactive_main_loop(void)
 802 {
 803         while (del_list.nr) {
 804                 struct menu_opts menu_opts;
 805                 struct menu_stuff menu_stuff;
 806                 struct menu_item menus[] = {
 807                         {'c', "clean",                  0, clean_cmd},
 808                         {'f', "filter by pattern",      0, filter_by_patterns_cmd},
 809                         {'s', "select by numbers",      0, select_by_numbers_cmd},
 810                         {'a', "ask each",               0, ask_each_cmd},
 811                         {'q', "quit",                   0, quit_cmd},
 812                         {'h', "help",                   0, help_cmd},
 813                 };
 814                 int *chosen;
 815
 816                 menu_opts.header = N_("*** Commands ***");
 817                 menu_opts.prompt = N_("What now");
 818                 menu_opts.flags = MENU_OPTS_SINGLETON;
 819
 820                 menu_stuff.type = MENU_STUFF_TYPE_MENU_ITEM;
 821                 menu_stuff.stuff = menus;
 822                 menu_stuff.nr = sizeof(menus) / sizeof(struct menu_item);
 823
 824                 clean_print_color(CLEAN_COLOR_HEADER);
 825                 printf_ln(Q_("Would remove the following item:",
 826                              "Would remove the following items:",
 827                              del_list.nr));
 828                 clean_print_color(CLEAN_COLOR_RESET);
 829
 830                 pretty_print_dels();
 831
 832                 chosen = list_and_choose(&menu_opts, &menu_stuff);
 833
 834                 if (*chosen != EOF) {
 835                         int ret;
 836                         ret = menus[*chosen].fn();
 837                         if (ret != MENU_RETURN_NO_LOOP) {
 838                                 FREE_AND_NULL(chosen);
 839                                 if (!del_list.nr) {
 840                                         clean_print_color(CLEAN_COLOR_ERROR);
 841                                         printf_ln(_("No more files to clean, exiting."));
 842                                         clean_print_color(CLEAN_COLOR_RESET);
 843                                         break;
 844                                 }
 845                                 continue;
 846                         }
 847                 } else {
 848                         quit_cmd();
 849                 }
 850
 851                 FREE_AND_NULL(chosen);
 852                 break;
 853         }
 854 }
 855
 856 static void correct_untracked_entries(struct dir_struct *dir)
 857 {
 858         int src, dst, ign;
 859
 860         for (src = dst = ign = 0; src < dir->nr; src++) {
 861                 /* skip paths in ignored[] that cannot be inside entries[src] */
 862                 while (ign < dir->ignored_nr &&
 863                        0 <= cmp_dir_entry(&dir->entries[src], &dir->ignored[ign]))
 864                         ign++;
 865
 866                 if (ign < dir->ignored_nr &&
 867                     check_dir_entry_contains(dir->entries[src], dir->ignored[ign])) {
 868                         /* entries[src] contains an ignored path, so we drop it */
 869                         free(dir->entries[src]);
 870                 } else {
 871                         struct dir_entry *ent = dir->entries[src++];
 872
 873                         /* entries[src] does not contain an ignored path, so we keep it */
 874                         dir->entries[dst++] = ent;
 875
 876                         /* then discard paths in entries[] contained inside entries[src] */
 877                         while (src < dir->nr &&
 878                                check_dir_entry_contains(ent, dir->entries[src]))
 879                                 free(dir->entries[src++]);
 880
 881                         /* compensate for the outer loop's loop control */
 882                         src--;
 883                 }
 884         }
 885         dir->nr = dst;
 886 }
 887
 888 int cmd_clean(int argc, const char **argv, const char *prefix)
 889 {
 890         int i, res;
 891         int dry_run = 0, remove_directories = 0, quiet = 0, ignored = 0;
 892         int ignored_only = 0, config_set = 0, errors = 0, gone = 1;
 893         int rm_flags = REMOVE_DIR_KEEP_NESTED_GIT;
 894         struct strbuf abs_path = STRBUF_INIT;
 895         struct dir_struct dir;
 896         struct pathspec pathspec;
 897         struct strbuf buf = STRBUF_INIT;
 898         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 899         struct pattern_list *pl;
 900         struct string_list_item *item;
 901         const char *qname;
 902         struct option options[] = {
 903                 OPT__QUIET(&quiet, N_("do not print names of files removed")),
 904                 OPT__DRY_RUN(&dry_run, N_("dry run")),
 905                 OPT__FORCE(&force, N_("force"), PARSE_OPT_NOCOMPLETE),
 906                 OPT_BOOL('i', "interactive", &interactive, N_("interactive cleaning")),
 907                 OPT_BOOL('d', NULL, &remove_directories,
 908                                 N_("remove whole directories")),
 909                 OPT_CALLBACK_F('e', "exclude", &exclude_list, N_("pattern"),
 910                   N_("add <pattern> to ignore rules"), PARSE_OPT_NONEG, exclude_cb),
 911                 OPT_BOOL('x', NULL, &ignored, N_("remove ignored files, too")),
 912                 OPT_BOOL('X', NULL, &ignored_only,
 913                                 N_("remove only ignored files")),
 914                 OPT_END()
 915         };
 916
 917         git_config(git_clean_config, NULL);
 918         if (force < 0)
 919                 force = 0;
 920         else
 921                 config_set = 1;
 922
 923         argc = parse_options(argc, argv, prefix, options, builtin_clean_usage,
 924                              0);
 925
 926         memset(&dir, 0, sizeof(dir));
 927         if (!interactive && !dry_run && !force) {
 928                 if (config_set)
 929                         die(_("clean.requireForce set to true and neither -i, -n, nor -f given; "
 930                                   "refusing to clean"));
 931                 else
 932                         die(_("clean.requireForce defaults to true and neither -i, -n, nor -f given;"
 933                                   " refusing to clean"));
 934         }
 935
 936         if (force > 1)
 937                 rm_flags = 0;
 938         else
 939                 dir.flags |= DIR_SKIP_NESTED_GIT;
 940
 941         dir.flags |= DIR_SHOW_OTHER_DIRECTORIES;
 942
 943         if (ignored && ignored_only)
 944                 die(_("-x and -X cannot be used together"));
 945         if (!ignored)
 946                 setup_standard_excludes(&dir);
 947         if (ignored_only)
 948                 dir.flags |= DIR_SHOW_IGNORED;
 949
 950         if (argc) {
 951                 /*
 952                  * Remaining args implies pathspecs specified, and we should
 953                  * recurse within those.
 954                  */
 955                 remove_directories = 1;
 956         }
 957
 958         if (remove_directories && !ignored_only) {
 959                 /*
 960                  * We need to know about ignored files too:
 961                  *
 962                  * If (ignored), then we will delete ignored files as well.
 963                  *
 964                  * If (!ignored), then even though we not are doing
 965                  * anything with ignored files, we need to know about them
 966                  * so that we can avoid deleting a directory of untracked
 967                  * files that also contains an ignored file within it.
 968                  *
 969                  * For the (!ignored) case, since we only need to avoid
 970                  * deleting ignored files, we can set
 971                  * DIR_SHOW_IGNORED_TOO_MODE_MATCHING in order to avoid
 972                  * recursing into a directory which is itself ignored.
 973                  */
 974                 dir.flags |= DIR_SHOW_IGNORED_TOO;
 975                 if (!ignored)
 976                         dir.flags |= DIR_SHOW_IGNORED_TOO_MODE_MATCHING;
 977
 978                 /*
 979                  * Let the fill_directory() machinery know that we aren't
 980                  * just recursing to collect the ignored files; we want all
 981                  * the untracked ones so that we can delete them.  (Note:
 982                  * we could also set DIR_KEEP_UNTRACKED_CONTENTS when
 983                  * ignored_only is true, since DIR_KEEP_UNTRACKED_CONTENTS
 984                  * only has effect in combination with DIR_SHOW_IGNORED_TOO.  It makes
 985                  * the code clearer to exclude it, though.
 986                  */
 987                 dir.flags |= DIR_KEEP_UNTRACKED_CONTENTS;
 988         }
 989
 990         if (read_cache() < 0)
 991                 die(_("index file corrupt"));
 992
 993         pl = add_pattern_list(&dir, EXC_CMDL, "--exclude option");
 994         for (i = 0; i < exclude_list.nr; i++)
 995                 add_pattern(exclude_list.items[i].string, "", 0, pl, -(i+1));
 996
 997         parse_pathspec(&pathspec, 0,
 998                        PATHSPEC_PREFER_CWD,
 999                        prefix, argv);
1000
1001         fill_directory(&dir, &the_index, &pathspec);
1002         correct_untracked_entries(&dir);
1003
1004         for (i = 0; i < dir.nr; i++) {
1005                 struct dir_entry *ent = dir.entries[i];
1006                 int matches = 0;
1007                 struct stat st;
1008                 const char *rel;
1009
1010                 if (!cache_name_is_other(ent->name, ent->len))
1011                         continue;
1012
1013                 if (lstat(ent->name, &st))
1014                         die_errno("Cannot lstat '%s'", ent->name);
1015
1016                 if (S_ISDIR(st.st_mode) && !remove_directories &&
1017                     matches != MATCHED_EXACTLY)
1018                         continue;
1019
1020                 rel = relative_path(ent->name, prefix, &buf);
1021                 string_list_append(&del_list, rel);
1022         }
1023
1024         for (i = 0; i < dir.nr; i++)
1025                 free(dir.entries[i]);
1026
1027         for (i = 0; i < dir.ignored_nr; i++)
1028                 free(dir.ignored[i]);
1029
1030         if (interactive && del_list.nr > 0)
1031                 interactive_main_loop();
1032
1033         for_each_string_list_item(item, &del_list) {
1034                 struct stat st;
1035
1036                 strbuf_reset(&abs_path);
1037                 if (prefix)
1038                         strbuf_addstr(&abs_path, prefix);
1039
1040                 strbuf_addstr(&abs_path, item->string);
1041
1042                 /*
1043                  * we might have removed this as part of earlier
1044                  * recursive directory removal, so lstat() here could
1045                  * fail with ENOENT.
1046                  */
1047                 if (lstat(abs_path.buf, &st))
1048                         continue;
1049
1050                 if (S_ISDIR(st.st_mode)) {
1051                         if (remove_dirs(&abs_path, prefix, rm_flags, dry_run, quiet, &gone))
1052                                 errors++;
1053                         if (gone && !quiet) {
1054                                 qname = quote_path_relative(item->string, NULL, &buf);
1055                                 printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
1056                         }
1057                 } else {
1058                         res = dry_run ? 0 : unlink(abs_path.buf);
1059                         if (res) {
1060                                 int saved_errno = errno;
1061                                 qname = quote_path_relative(item->string, NULL, &buf);
1062                                 errno = saved_errno;
1063                                 warning_errno(_(msg_warn_remove_failed), qname);
1064                                 errors++;
1065                         } else if (!quiet) {
1066                                 qname = quote_path_relative(item->string, NULL, &buf);
1067                                 printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
1068                         }
1069                 }
1070         }
1071
1072         strbuf_release(&abs_path);
1073         strbuf_release(&buf);
1074         string_list_clear(&del_list, 0);
1075         string_list_clear(&exclude_list, 0);
1076         return (errors != 0);
1077 }