Andrew's git - gitweb.git/blob - builtin-ls-files.c

   1/*
   2 * This merges the file listing in the directory cache index
   3 * with the actual working directory list, and shows different
   4 * combinations of the two.
   5 *
   6 * Copyright (C) Linus Torvalds, 2005
   7 */
   8#include <fnmatch.h>
   9
  10#include "cache.h"
  11#include "quote.h"
  12#include "dir.h"
  13#include "builtin.h"
  14
  15static int abbrev = 0;
  16static int show_deleted = 0;
  17static int show_cached = 0;
  18static int show_others = 0;
  19static int show_stage = 0;
  20static int show_unmerged = 0;
  21static int show_modified = 0;
  22static int show_killed = 0;
  23static int show_valid_bit = 0;
  24static int line_terminator = '\n';
  25
  26static int prefix_len = 0, prefix_offset = 0;
  27static const char **pathspec = NULL;
  28static int error_unmatch = 0;
  29static char *ps_matched = NULL;
  30
  31static const char *tag_cached = "";
  32static const char *tag_unmerged = "";
  33static const char *tag_removed = "";
  34static const char *tag_other = "";
  35static const char *tag_killed = "";
  36static const char *tag_modified = "";
  37
  38
  39/*
  40 * Match a pathspec against a filename. The first "len" characters
  41 * are the common prefix
  42 */
  43static int match(const char **spec, char *ps_matched,
  44                 const char *filename, int len)
  45{
  46        const char *m;
  47
  48        while ((m = *spec++) != NULL) {
  49                int matchlen = strlen(m + len);
  50
  51                if (!matchlen)
  52                        goto matched;
  53                if (!strncmp(m + len, filename + len, matchlen)) {
  54                        if (m[len + matchlen - 1] == '/')
  55                                goto matched;
  56                        switch (filename[len + matchlen]) {
  57                        case '/': case '\0':
  58                                goto matched;
  59                        }
  60                }
  61                if (!fnmatch(m + len, filename + len, 0))
  62                        goto matched;
  63                if (ps_matched)
  64                        ps_matched++;
  65                continue;
  66        matched:
  67                if (ps_matched)
  68                        *ps_matched = 1;
  69                return 1;
  70        }
  71        return 0;
  72}
  73
  74static void show_dir_entry(const char *tag, struct dir_entry *ent)
  75{
  76        int len = prefix_len;
  77        int offset = prefix_offset;
  78
  79        if (len >= ent->len)
  80                die("git-ls-files: internal error - directory entry not superset of prefix");
  81
  82        if (pathspec && !match(pathspec, ps_matched, ent->name, len))
  83                return;
  84
  85        fputs(tag, stdout);
  86        write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
  87        putchar(line_terminator);
  88}
  89
  90static void show_other_files(struct dir_struct *dir)
  91{
  92        int i;
  93        for (i = 0; i < dir->nr; i++) {
  94                /* We should not have a matching entry, but we
  95                 * may have an unmerged entry for this path.
  96                 */
  97                struct dir_entry *ent = dir->entries[i];
  98                int pos = cache_name_pos(ent->name, ent->len);
  99                struct cache_entry *ce;
 100                if (0 <= pos)
 101                        die("bug in show-other-files");
 102                pos = -pos - 1;
 103                if (pos < active_nr) { 
 104                        ce = active_cache[pos];
 105                        if (ce_namelen(ce) == ent->len &&
 106                            !memcmp(ce->name, ent->name, ent->len))
 107                                continue; /* Yup, this one exists unmerged */
 108                }
 109                show_dir_entry(tag_other, ent);
 110        }
 111}
 112
 113static void show_killed_files(struct dir_struct *dir)
 114{
 115        int i;
 116        for (i = 0; i < dir->nr; i++) {
 117                struct dir_entry *ent = dir->entries[i];
 118                char *cp, *sp;
 119                int pos, len, killed = 0;
 120
 121                for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
 122                        sp = strchr(cp, '/');
 123                        if (!sp) {
 124                                /* If ent->name is prefix of an entry in the
 125                                 * cache, it will be killed.
 126                                 */
 127                                pos = cache_name_pos(ent->name, ent->len);
 128                                if (0 <= pos)
 129                                        die("bug in show-killed-files");
 130                                pos = -pos - 1;
 131                                while (pos < active_nr &&
 132                                       ce_stage(active_cache[pos]))
 133                                        pos++; /* skip unmerged */
 134                                if (active_nr <= pos)
 135                                        break;
 136                                /* pos points at a name immediately after
 137                                 * ent->name in the cache.  Does it expect
 138                                 * ent->name to be a directory?
 139                                 */
 140                                len = ce_namelen(active_cache[pos]);
 141                                if ((ent->len < len) &&
 142                                    !strncmp(active_cache[pos]->name,
 143                                             ent->name, ent->len) &&
 144                                    active_cache[pos]->name[ent->len] == '/')
 145                                        killed = 1;
 146                                break;
 147                        }
 148                        if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
 149                                /* If any of the leading directories in
 150                                 * ent->name is registered in the cache,
 151                                 * ent->name will be killed.
 152                                 */
 153                                killed = 1;
 154                                break;
 155                        }
 156                }
 157                if (killed)
 158                        show_dir_entry(tag_killed, dir->entries[i]);
 159        }
 160}
 161
 162static void show_ce_entry(const char *tag, struct cache_entry *ce)
 163{
 164        int len = prefix_len;
 165        int offset = prefix_offset;
 166
 167        if (len >= ce_namelen(ce))
 168                die("git-ls-files: internal error - cache entry not superset of prefix");
 169
 170        if (pathspec && !match(pathspec, ps_matched, ce->name, len))
 171                return;
 172
 173        if (tag && *tag && show_valid_bit &&
 174            (ce->ce_flags & htons(CE_VALID))) {
 175                static char alttag[4];
 176                memcpy(alttag, tag, 3);
 177                if (isalpha(tag[0]))
 178                        alttag[0] = tolower(tag[0]);
 179                else if (tag[0] == '?')
 180                        alttag[0] = '!';
 181                else {
 182                        alttag[0] = 'v';
 183                        alttag[1] = tag[0];
 184                        alttag[2] = ' ';
 185                        alttag[3] = 0;
 186                }
 187                tag = alttag;
 188        }
 189
 190        if (!show_stage) {
 191                fputs(tag, stdout);
 192                write_name_quoted("", 0, ce->name + offset,
 193                                  line_terminator, stdout);
 194                putchar(line_terminator);
 195        }
 196        else {
 197                printf("%s%06o %s %d\t",
 198                       tag,
 199                       ntohl(ce->ce_mode),
 200                       abbrev ? find_unique_abbrev(ce->sha1,abbrev)
 201                                : sha1_to_hex(ce->sha1),
 202                       ce_stage(ce));
 203                write_name_quoted("", 0, ce->name + offset,
 204                                  line_terminator, stdout);
 205                putchar(line_terminator);
 206        }
 207}
 208
 209static void show_files(struct dir_struct *dir, const char *prefix)
 210{
 211        int i;
 212
 213        /* For cached/deleted files we don't need to even do the readdir */
 214        if (show_others || show_killed) {
 215                const char *path = ".", *base = "";
 216                int baselen = prefix_len;
 217
 218                if (baselen)
 219                        path = base = prefix;
 220                read_directory(dir, path, base, baselen);
 221                if (show_others)
 222                        show_other_files(dir);
 223                if (show_killed)
 224                        show_killed_files(dir);
 225        }
 226        if (show_cached | show_stage) {
 227                for (i = 0; i < active_nr; i++) {
 228                        struct cache_entry *ce = active_cache[i];
 229                        if (excluded(dir, ce->name) != dir->show_ignored)
 230                                continue;
 231                        if (show_unmerged && !ce_stage(ce))
 232                                continue;
 233                        show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
 234                }
 235        }
 236        if (show_deleted | show_modified) {
 237                for (i = 0; i < active_nr; i++) {
 238                        struct cache_entry *ce = active_cache[i];
 239                        struct stat st;
 240                        int err;
 241                        if (excluded(dir, ce->name) != dir->show_ignored)
 242                                continue;
 243                        err = lstat(ce->name, &st);
 244                        if (show_deleted && err)
 245                                show_ce_entry(tag_removed, ce);
 246                        if (show_modified && ce_modified(ce, &st, 0))
 247                                show_ce_entry(tag_modified, ce);
 248                }
 249        }
 250}
 251
 252/*
 253 * Prune the index to only contain stuff starting with "prefix"
 254 */
 255static void prune_cache(const char *prefix)
 256{
 257        int pos = cache_name_pos(prefix, prefix_len);
 258        unsigned int first, last;
 259
 260        if (pos < 0)
 261                pos = -pos-1;
 262        active_cache += pos;
 263        active_nr -= pos;
 264        first = 0;
 265        last = active_nr;
 266        while (last > first) {
 267                int next = (last + first) >> 1;
 268                struct cache_entry *ce = active_cache[next];
 269                if (!strncmp(ce->name, prefix, prefix_len)) {
 270                        first = next+1;
 271                        continue;
 272                }
 273                last = next;
 274        }
 275        active_nr = last;
 276}
 277
 278static const char *verify_pathspec(const char *prefix)
 279{
 280        const char **p, *n, *prev;
 281        char *real_prefix;
 282        unsigned long max;
 283
 284        prev = NULL;
 285        max = PATH_MAX;
 286        for (p = pathspec; (n = *p) != NULL; p++) {
 287                int i, len = 0;
 288                for (i = 0; i < max; i++) {
 289                        char c = n[i];
 290                        if (prev && prev[i] != c)
 291                                break;
 292                        if (!c || c == '*' || c == '?')
 293                                break;
 294                        if (c == '/')
 295                                len = i+1;
 296                }
 297                prev = n;
 298                if (len < max) {
 299                        max = len;
 300                        if (!max)
 301                                break;
 302                }
 303        }
 304
 305        if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
 306                die("git-ls-files: cannot generate relative filenames containing '..'");
 307
 308        real_prefix = NULL;
 309        prefix_len = max;
 310        if (max) {
 311                real_prefix = xmalloc(max + 1);
 312                memcpy(real_prefix, prev, max);
 313                real_prefix[max] = 0;
 314        }
 315        return real_prefix;
 316}
 317
 318static const char ls_files_usage[] =
 319        "git-ls-files [-z] [-t] [-v] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
 320        "[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
 321        "[ --exclude-per-directory=<filename> ] [--full-name] [--abbrev] "
 322        "[--] [<file>]*";
 323
 324int cmd_ls_files(int argc, const char **argv, const char *prefix)
 325{
 326        int i;
 327        int exc_given = 0;
 328        struct dir_struct dir;
 329
 330        memset(&dir, 0, sizeof(dir));
 331        if (prefix)
 332                prefix_offset = strlen(prefix);
 333        git_config(git_default_config);
 334
 335        for (i = 1; i < argc; i++) {
 336                const char *arg = argv[i];
 337
 338                if (!strcmp(arg, "--")) {
 339                        i++;
 340                        break;
 341                }
 342                if (!strcmp(arg, "-z")) {
 343                        line_terminator = 0;
 344                        continue;
 345                }
 346                if (!strcmp(arg, "-t") || !strcmp(arg, "-v")) {
 347                        tag_cached = "H ";
 348                        tag_unmerged = "M ";
 349                        tag_removed = "R ";
 350                        tag_modified = "C ";
 351                        tag_other = "? ";
 352                        tag_killed = "K ";
 353                        if (arg[1] == 'v')
 354                                show_valid_bit = 1;
 355                        continue;
 356                }
 357                if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
 358                        show_cached = 1;
 359                        continue;
 360                }
 361                if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
 362                        show_deleted = 1;
 363                        continue;
 364                }
 365                if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
 366                        show_modified = 1;
 367                        continue;
 368                }
 369                if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
 370                        show_others = 1;
 371                        continue;
 372                }
 373                if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
 374                        dir.show_ignored = 1;
 375                        continue;
 376                }
 377                if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
 378                        show_stage = 1;
 379                        continue;
 380                }
 381                if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
 382                        show_killed = 1;
 383                        continue;
 384                }
 385                if (!strcmp(arg, "--directory")) {
 386                        dir.show_other_directories = 1;
 387                        continue;
 388                }
 389                if (!strcmp(arg, "--no-empty-directory")) {
 390                        dir.hide_empty_directories = 1;
 391                        continue;
 392                }
 393                if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
 394                        /* There's no point in showing unmerged unless
 395                         * you also show the stage information.
 396                         */
 397                        show_stage = 1;
 398                        show_unmerged = 1;
 399                        continue;
 400                }
 401                if (!strcmp(arg, "-x") && i+1 < argc) {
 402                        exc_given = 1;
 403                        add_exclude(argv[++i], "", 0, &dir.exclude_list[EXC_CMDL]);
 404                        continue;
 405                }
 406                if (!strncmp(arg, "--exclude=", 10)) {
 407                        exc_given = 1;
 408                        add_exclude(arg+10, "", 0, &dir.exclude_list[EXC_CMDL]);
 409                        continue;
 410                }
 411                if (!strcmp(arg, "-X") && i+1 < argc) {
 412                        exc_given = 1;
 413                        add_excludes_from_file(&dir, argv[++i]);
 414                        continue;
 415                }
 416                if (!strncmp(arg, "--exclude-from=", 15)) {
 417                        exc_given = 1;
 418                        add_excludes_from_file(&dir, arg+15);
 419                        continue;
 420                }
 421                if (!strncmp(arg, "--exclude-per-directory=", 24)) {
 422                        exc_given = 1;
 423                        dir.exclude_per_dir = arg + 24;
 424                        continue;
 425                }
 426                if (!strcmp(arg, "--full-name")) {
 427                        prefix_offset = 0;
 428                        continue;
 429                }
 430                if (!strcmp(arg, "--error-unmatch")) {
 431                        error_unmatch = 1;
 432                        continue;
 433                }
 434                if (!strncmp(arg, "--abbrev=", 9)) {
 435                        abbrev = strtoul(arg+9, NULL, 10);
 436                        if (abbrev && abbrev < MINIMUM_ABBREV)
 437                                abbrev = MINIMUM_ABBREV;
 438                        else if (abbrev > 40)
 439                                abbrev = 40;
 440                        continue;
 441                }
 442                if (!strcmp(arg, "--abbrev")) {
 443                        abbrev = DEFAULT_ABBREV;
 444                        continue;
 445                }
 446                if (*arg == '-')
 447                        usage(ls_files_usage);
 448                break;
 449        }
 450
 451        pathspec = get_pathspec(prefix, argv + i);
 452
 453        /* Verify that the pathspec matches the prefix */
 454        if (pathspec)
 455                prefix = verify_pathspec(prefix);
 456
 457        /* Treat unmatching pathspec elements as errors */
 458        if (pathspec && error_unmatch) {
 459                int num;
 460                for (num = 0; pathspec[num]; num++)
 461                        ;
 462                ps_matched = xcalloc(1, num);
 463        }
 464
 465        if (dir.show_ignored && !exc_given) {
 466                fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
 467                        argv[0]);
 468                exit(1);
 469        }
 470
 471        /* With no flags, we default to showing the cached files */
 472        if (!(show_stage | show_deleted | show_others | show_unmerged |
 473              show_killed | show_modified))
 474                show_cached = 1;
 475
 476        read_cache();
 477        if (prefix)
 478                prune_cache(prefix);
 479        show_files(&dir, prefix);
 480
 481        if (ps_matched) {
 482                /* We need to make sure all pathspec matched otherwise
 483                 * it is an error.
 484                 */
 485                int num, errors = 0;
 486                for (num = 0; pathspec[num]; num++) {
 487                        if (ps_matched[num])
 488                                continue;
 489                        error("pathspec '%s' did not match any.",
 490                              pathspec[num] + prefix_offset);
 491                        errors++;
 492                }
 493                return errors ? 1 : 0;
 494        }
 495
 496        return 0;
 497}