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