builtin/checkout-index.c

   1 /*
   2  * Check-out files from the "current cache directory"
   3  *
   4  * Copyright (C) 2005 Linus Torvalds
   5  *
   6  */
   7 #define USE_THE_INDEX_VARIABLE
   8 #include "builtin.h"
   9 #include "config.h"
  10 #include "dir.h"
  11 #include "gettext.h"
  12 #include "lockfile.h"
  13 #include "quote.h"
  14 #include "repository.h"
  15 #include "cache-tree.h"
  16 #include "parse-options.h"
  17 #include "entry.h"
  18 #include "parallel-checkout.h"
  19 #include "setup.h"
  20 #include "sparse-index.h"
  21
  22 #define CHECKOUT_ALL 4
  23 static int nul_term_line;
  24 static int checkout_stage; /* default to checkout stage0 */
  25 static int ignore_skip_worktree; /* default to 0 */
  26 static int to_tempfile;
  27 static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
  28
  29 static struct checkout state = CHECKOUT_INIT;
  30
  31 static void write_tempfile_record(const char *name, const char *prefix)
  32 {
  33         int i;
  34         int have_tempname = 0;
  35
  36         if (CHECKOUT_ALL == checkout_stage) {
  37                 for (i = 1; i < 4; i++)
  38                         if (topath[i][0]) {
  39                                 have_tempname = 1;
  40                                 break;
  41                         }
  42
  43                 if (have_tempname) {
  44                         for (i = 1; i < 4; i++) {
  45                                 if (i > 1)
  46                                         putchar(' ');
  47                                 if (topath[i][0])
  48                                         fputs(topath[i], stdout);
  49                                 else
  50                                         putchar('.');
  51                         }
  52                 }
  53         } else if (topath[checkout_stage][0]) {
  54                 have_tempname = 1;
  55                 fputs(topath[checkout_stage], stdout);
  56         }
  57
  58         if (have_tempname) {
  59                 putchar('\t');
  60                 write_name_quoted_relative(name, prefix, stdout,
  61                                            nul_term_line ? '\0' : '\n');
  62         }
  63
  64         for (i = 0; i < 4; i++) {
  65                 topath[i][0] = 0;
  66         }
  67 }
  68
  69 static int checkout_file(const char *name, const char *prefix)
  70 {
  71         int namelen = strlen(name);
  72         int pos = index_name_pos(&the_index, name, namelen);
  73         int has_same_name = 0;
  74         int is_file = 0;
  75         int is_skipped = 1;
  76         int did_checkout = 0;
  77         int errs = 0;
  78
  79         if (pos < 0)
  80                 pos = -pos - 1;
  81
  82         while (pos < the_index.cache_nr) {
  83                 struct cache_entry *ce = the_index.cache[pos];
  84                 if (ce_namelen(ce) != namelen ||
  85                     memcmp(ce->name, name, namelen))
  86                         break;
  87                 has_same_name = 1;
  88                 pos++;
  89                 if (S_ISSPARSEDIR(ce->ce_mode))
  90                         break;
  91                 is_file = 1;
  92                 if (!ignore_skip_worktree && ce_skip_worktree(ce))
  93                         break;
  94                 is_skipped = 0;
  95                 if (ce_stage(ce) != checkout_stage
  96                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
  97                         continue;
  98                 did_checkout = 1;
  99                 if (checkout_entry(ce, &state,
 100                                    to_tempfile ? topath[ce_stage(ce)] : NULL,
 101                                    NULL) < 0)
 102                         errs++;
 103         }
 104
 105         if (did_checkout) {
 106                 if (to_tempfile)
 107                         write_tempfile_record(name, prefix);
 108                 return errs > 0 ? -1 : 0;
 109         }
 110
 111         /*
 112          * At this point we know we didn't try to check anything out. If it was
 113          * because we did find an entry but it was stage 0, that's not an
 114          * error.
 115          */
 116         if (has_same_name && checkout_stage == CHECKOUT_ALL)
 117                 return 0;
 118
 119         if (!state.quiet) {
 120                 fprintf(stderr, "git checkout-index: %s ", name);
 121                 if (!has_same_name)
 122                         fprintf(stderr, "is not in the cache");
 123                 else if (!is_file)
 124                         fprintf(stderr, "is a sparse directory");
 125                 else if (is_skipped)
 126                         fprintf(stderr, "has skip-worktree enabled; "
 127                                         "use '--ignore-skip-worktree-bits' to checkout");
 128                 else if (checkout_stage)
 129                         fprintf(stderr, "does not exist at stage %d",
 130                                 checkout_stage);
 131                 else
 132                         fprintf(stderr, "is unmerged");
 133                 fputc('\n', stderr);
 134         }
 135         return -1;
 136 }
 137
 138 static int checkout_all(const char *prefix, int prefix_length)
 139 {
 140         int i, errs = 0;
 141         struct cache_entry *last_ce = NULL;
 142
 143         for (i = 0; i < the_index.cache_nr ; i++) {
 144                 struct cache_entry *ce = the_index.cache[i];
 145
 146                 if (S_ISSPARSEDIR(ce->ce_mode)) {
 147                         if (!ce_skip_worktree(ce))
 148                                 BUG("sparse directory '%s' does not have skip-worktree set", ce->name);
 149
 150                         /*
 151                          * If the current entry is a sparse directory and skip-worktree
 152                          * entries are being checked out, expand the index and continue
 153                          * the loop on the current index position (now pointing to the
 154                          * first entry inside the expanded sparse directory).
 155                          */
 156                         if (ignore_skip_worktree) {
 157                                 ensure_full_index(&the_index);
 158                                 ce = the_index.cache[i];
 159                         }
 160                 }
 161
 162                 if (!ignore_skip_worktree && ce_skip_worktree(ce))
 163                         continue;
 164                 if (ce_stage(ce) != checkout_stage
 165                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
 166                         continue;
 167                 if (prefix && *prefix &&
 168                     (ce_namelen(ce) <= prefix_length ||
 169                      memcmp(prefix, ce->name, prefix_length)))
 170                         continue;
 171                 if (last_ce && to_tempfile) {
 172                         if (ce_namelen(last_ce) != ce_namelen(ce)
 173                             || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
 174                                 write_tempfile_record(last_ce->name, prefix);
 175                 }
 176                 if (checkout_entry(ce, &state,
 177                                    to_tempfile ? topath[ce_stage(ce)] : NULL,
 178                                    NULL) < 0)
 179                         errs++;
 180                 last_ce = ce;
 181         }
 182         if (last_ce && to_tempfile)
 183                 write_tempfile_record(last_ce->name, prefix);
 184         return !!errs;
 185 }
 186
 187 static const char * const builtin_checkout_index_usage[] = {
 188         N_("git checkout-index [<options>] [--] [<file>...]"),
 189         NULL
 190 };
 191
 192 static int option_parse_stage(const struct option *opt,
 193                               const char *arg, int unset)
 194 {
 195         BUG_ON_OPT_NEG(unset);
 196
 197         if (!strcmp(arg, "all")) {
 198                 to_tempfile = 1;
 199                 checkout_stage = CHECKOUT_ALL;
 200         } else {
 201                 int ch = arg[0];
 202                 if ('1' <= ch && ch <= '3')
 203                         checkout_stage = arg[0] - '0';
 204                 else
 205                         die(_("stage should be between 1 and 3 or all"));
 206         }
 207         return 0;
 208 }
 209
 210 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 211 {
 212         int i;
 213         struct lock_file lock_file = LOCK_INIT;
 214         int all = 0;
 215         int read_from_stdin = 0;
 216         int prefix_length;
 217         int force = 0, quiet = 0, not_new = 0;
 218         int index_opt = 0;
 219         int err = 0;
 220         int pc_workers, pc_threshold;
 221         struct option builtin_checkout_index_options[] = {
 222                 OPT_BOOL('a', "all", &all,
 223                         N_("check out all files in the index")),
 224                 OPT_BOOL(0, "ignore-skip-worktree-bits", &ignore_skip_worktree,
 225                         N_("do not skip files with skip-worktree set")),
 226                 OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
 227                 OPT__QUIET(&quiet,
 228                         N_("no warning for existing files and files not in index")),
 229                 OPT_BOOL('n', "no-create", &not_new,
 230                         N_("don't checkout new files")),
 231                 OPT_BOOL('u', "index", &index_opt,
 232                          N_("update stat information in the index file")),
 233                 OPT_BOOL('z', NULL, &nul_term_line,
 234                         N_("paths are separated with NUL character")),
 235                 OPT_BOOL(0, "stdin", &read_from_stdin,
 236                         N_("read list of paths from the standard input")),
 237                 OPT_BOOL(0, "temp", &to_tempfile,
 238                         N_("write the content to temporary files")),
 239                 OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
 240                         N_("when creating files, prepend <string>")),
 241                 OPT_CALLBACK_F(0, "stage", NULL, "(1|2|3|all)",
 242                         N_("copy out the files from named stage"),
 243                         PARSE_OPT_NONEG, option_parse_stage),
 244                 OPT_END()
 245         };
 246
 247         if (argc == 2 && !strcmp(argv[1], "-h"))
 248                 usage_with_options(builtin_checkout_index_usage,
 249                                    builtin_checkout_index_options);
 250         git_config(git_default_config, NULL);
 251         prefix_length = prefix ? strlen(prefix) : 0;
 252
 253         prepare_repo_settings(the_repository);
 254         the_repository->settings.command_requires_full_index = 0;
 255
 256         if (repo_read_index(the_repository) < 0) {
 257                 die("invalid cache");
 258         }
 259
 260         argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 261                         builtin_checkout_index_usage, 0);
 262         state.istate = &the_index;
 263         state.force = force;
 264         state.quiet = quiet;
 265         state.not_new = not_new;
 266
 267         if (!state.base_dir)
 268                 state.base_dir = "";
 269         state.base_dir_len = strlen(state.base_dir);
 270
 271         /*
 272          * when --prefix is specified we do not want to update cache.
 273          */
 274         if (index_opt && !state.base_dir_len && !to_tempfile) {
 275                 state.refresh_cache = 1;
 276                 state.istate = &the_index;
 277                 repo_hold_locked_index(the_repository, &lock_file,
 278                                        LOCK_DIE_ON_ERROR);
 279         }
 280
 281         get_parallel_checkout_configs(&pc_workers, &pc_threshold);
 282         if (pc_workers > 1)
 283                 init_parallel_checkout();
 284
 285         /* Check out named files first */
 286         for (i = 0; i < argc; i++) {
 287                 const char *arg = argv[i];
 288                 char *p;
 289
 290                 if (all)
 291                         die("git checkout-index: don't mix '--all' and explicit filenames");
 292                 if (read_from_stdin)
 293                         die("git checkout-index: don't mix '--stdin' and explicit filenames");
 294                 p = prefix_path(prefix, prefix_length, arg);
 295                 err |= checkout_file(p, prefix);
 296                 free(p);
 297         }
 298
 299         if (read_from_stdin) {
 300                 struct strbuf buf = STRBUF_INIT;
 301                 struct strbuf unquoted = STRBUF_INIT;
 302                 strbuf_getline_fn getline_fn;
 303
 304                 if (all)
 305                         die("git checkout-index: don't mix '--all' and '--stdin'");
 306
 307                 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 308                 while (getline_fn(&buf, stdin) != EOF) {
 309                         char *p;
 310                         if (!nul_term_line && buf.buf[0] == '"') {
 311                                 strbuf_reset(&unquoted);
 312                                 if (unquote_c_style(&unquoted, buf.buf, NULL))
 313                                         die("line is badly quoted");
 314                                 strbuf_swap(&buf, &unquoted);
 315                         }
 316                         p = prefix_path(prefix, prefix_length, buf.buf);
 317                         err |= checkout_file(p, prefix);
 318                         free(p);
 319                 }
 320                 strbuf_release(&unquoted);
 321                 strbuf_release(&buf);
 322         }
 323
 324         if (all)
 325                 err |= checkout_all(prefix, prefix_length);
 326
 327         if (pc_workers > 1)
 328                 err |= run_parallel_checkout(&state, pc_workers, pc_threshold,
 329                                              NULL, NULL);
 330
 331         if (err)
 332                 return 1;
 333
 334         if (is_lock_file_locked(&lock_file) &&
 335             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 336                 die("Unable to write new index file");
 337         return 0;
 338 }