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 "read-cache-ll.h"
  20 #include "setup.h"
  21 #include "sparse-index.h"
  22
  23 #define CHECKOUT_ALL 4
  24 static int nul_term_line;
  25 static int checkout_stage; /* default to checkout stage0 */
  26 static int ignore_skip_worktree; /* default to 0 */
  27 static int to_tempfile;
  28 static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
  29
  30 static struct checkout state = CHECKOUT_INIT;
  31
  32 static void write_tempfile_record(const char *name, const char *prefix)
  33 {
  34         int i;
  35         int have_tempname = 0;
  36
  37         if (CHECKOUT_ALL == checkout_stage) {
  38                 for (i = 1; i < 4; i++)
  39                         if (topath[i][0]) {
  40                                 have_tempname = 1;
  41                                 break;
  42                         }
  43
  44                 if (have_tempname) {
  45                         for (i = 1; i < 4; i++) {
  46                                 if (i > 1)
  47                                         putchar(' ');
  48                                 if (topath[i][0])
  49                                         fputs(topath[i], stdout);
  50                                 else
  51                                         putchar('.');
  52                         }
  53                 }
  54         } else if (topath[checkout_stage][0]) {
  55                 have_tempname = 1;
  56                 fputs(topath[checkout_stage], stdout);
  57         }
  58
  59         if (have_tempname) {
  60                 putchar('\t');
  61                 write_name_quoted_relative(name, prefix, stdout,
  62                                            nul_term_line ? '\0' : '\n');
  63         }
  64
  65         for (i = 0; i < 4; i++) {
  66                 topath[i][0] = 0;
  67         }
  68 }
  69
  70 static int checkout_file(const char *name, const char *prefix)
  71 {
  72         int namelen = strlen(name);
  73         int pos = index_name_pos(&the_index, name, namelen);
  74         int has_same_name = 0;
  75         int is_file = 0;
  76         int is_skipped = 1;
  77         int did_checkout = 0;
  78         int errs = 0;
  79
  80         if (pos < 0)
  81                 pos = -pos - 1;
  82
  83         while (pos < the_index.cache_nr) {
  84                 struct cache_entry *ce = the_index.cache[pos];
  85                 if (ce_namelen(ce) != namelen ||
  86                     memcmp(ce->name, name, namelen))
  87                         break;
  88                 has_same_name = 1;
  89                 pos++;
  90                 if (S_ISSPARSEDIR(ce->ce_mode))
  91                         break;
  92                 is_file = 1;
  93                 if (!ignore_skip_worktree && ce_skip_worktree(ce))
  94                         break;
  95                 is_skipped = 0;
  96                 if (ce_stage(ce) != checkout_stage
  97                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
  98                         continue;
  99                 did_checkout = 1;
 100                 if (checkout_entry(ce, &state,
 101                                    to_tempfile ? topath[ce_stage(ce)] : NULL,
 102                                    NULL) < 0)
 103                         errs++;
 104         }
 105
 106         if (did_checkout) {
 107                 if (to_tempfile)
 108                         write_tempfile_record(name, prefix);
 109                 return errs > 0 ? -1 : 0;
 110         }
 111
 112         /*
 113          * At this point we know we didn't try to check anything out. If it was
 114          * because we did find an entry but it was stage 0, that's not an
 115          * error.
 116          */
 117         if (has_same_name && checkout_stage == CHECKOUT_ALL)
 118                 return 0;
 119
 120         if (!state.quiet) {
 121                 fprintf(stderr, "git checkout-index: %s ", name);
 122                 if (!has_same_name)
 123                         fprintf(stderr, "is not in the cache");
 124                 else if (!is_file)
 125                         fprintf(stderr, "is a sparse directory");
 126                 else if (is_skipped)
 127                         fprintf(stderr, "has skip-worktree enabled; "
 128                                         "use '--ignore-skip-worktree-bits' to checkout");
 129                 else if (checkout_stage)
 130                         fprintf(stderr, "does not exist at stage %d",
 131                                 checkout_stage);
 132                 else
 133                         fprintf(stderr, "is unmerged");
 134                 fputc('\n', stderr);
 135         }
 136         return -1;
 137 }
 138
 139 static int checkout_all(const char *prefix, int prefix_length)
 140 {
 141         int i, errs = 0;
 142         struct cache_entry *last_ce = NULL;
 143
 144         for (i = 0; i < the_index.cache_nr ; i++) {
 145                 struct cache_entry *ce = the_index.cache[i];
 146
 147                 if (S_ISSPARSEDIR(ce->ce_mode)) {
 148                         if (!ce_skip_worktree(ce))
 149                                 BUG("sparse directory '%s' does not have skip-worktree set", ce->name);
 150
 151                         /*
 152                          * If the current entry is a sparse directory and skip-worktree
 153                          * entries are being checked out, expand the index and continue
 154                          * the loop on the current index position (now pointing to the
 155                          * first entry inside the expanded sparse directory).
 156                          */
 157                         if (ignore_skip_worktree) {
 158                                 ensure_full_index(&the_index);
 159                                 ce = the_index.cache[i];
 160                         }
 161                 }
 162
 163                 if (!ignore_skip_worktree && ce_skip_worktree(ce))
 164                         continue;
 165                 if (ce_stage(ce) != checkout_stage
 166                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
 167                         continue;
 168                 if (prefix && *prefix &&
 169                     (ce_namelen(ce) <= prefix_length ||
 170                      memcmp(prefix, ce->name, prefix_length)))
 171                         continue;
 172                 if (last_ce && to_tempfile) {
 173                         if (ce_namelen(last_ce) != ce_namelen(ce)
 174                             || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
 175                                 write_tempfile_record(last_ce->name, prefix);
 176                 }
 177                 if (checkout_entry(ce, &state,
 178                                    to_tempfile ? topath[ce_stage(ce)] : NULL,
 179                                    NULL) < 0)
 180                         errs++;
 181                 last_ce = ce;
 182         }
 183         if (last_ce && to_tempfile)
 184                 write_tempfile_record(last_ce->name, prefix);
 185         return !!errs;
 186 }
 187
 188 static const char * const builtin_checkout_index_usage[] = {
 189         N_("git checkout-index [<options>] [--] [<file>...]"),
 190         NULL
 191 };
 192
 193 static int option_parse_stage(const struct option *opt,
 194                               const char *arg, int unset)
 195 {
 196         BUG_ON_OPT_NEG(unset);
 197
 198         if (!strcmp(arg, "all")) {
 199                 to_tempfile = 1;
 200                 checkout_stage = CHECKOUT_ALL;
 201         } else {
 202                 int ch = arg[0];
 203                 if ('1' <= ch && ch <= '3')
 204                         checkout_stage = arg[0] - '0';
 205                 else
 206                         die(_("stage should be between 1 and 3 or all"));
 207         }
 208         return 0;
 209 }
 210
 211 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 212 {
 213         int i;
 214         struct lock_file lock_file = LOCK_INIT;
 215         int all = 0;
 216         int read_from_stdin = 0;
 217         int prefix_length;
 218         int force = 0, quiet = 0, not_new = 0;
 219         int index_opt = 0;
 220         int err = 0;
 221         int pc_workers, pc_threshold;
 222         struct option builtin_checkout_index_options[] = {
 223                 OPT_BOOL('a', "all", &all,
 224                         N_("check out all files in the index")),
 225                 OPT_BOOL(0, "ignore-skip-worktree-bits", &ignore_skip_worktree,
 226                         N_("do not skip files with skip-worktree set")),
 227                 OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
 228                 OPT__QUIET(&quiet,
 229                         N_("no warning for existing files and files not in index")),
 230                 OPT_BOOL('n', "no-create", &not_new,
 231                         N_("don't checkout new files")),
 232                 OPT_BOOL('u', "index", &index_opt,
 233                          N_("update stat information in the index file")),
 234                 OPT_BOOL('z', NULL, &nul_term_line,
 235                         N_("paths are separated with NUL character")),
 236                 OPT_BOOL(0, "stdin", &read_from_stdin,
 237                         N_("read list of paths from the standard input")),
 238                 OPT_BOOL(0, "temp", &to_tempfile,
 239                         N_("write the content to temporary files")),
 240                 OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
 241                         N_("when creating files, prepend <string>")),
 242                 OPT_CALLBACK_F(0, "stage", NULL, "(1|2|3|all)",
 243                         N_("copy out the files from named stage"),
 244                         PARSE_OPT_NONEG, option_parse_stage),
 245                 OPT_END()
 246         };
 247
 248         if (argc == 2 && !strcmp(argv[1], "-h"))
 249                 usage_with_options(builtin_checkout_index_usage,
 250                                    builtin_checkout_index_options);
 251         git_config(git_default_config, NULL);
 252         prefix_length = prefix ? strlen(prefix) : 0;
 253
 254         prepare_repo_settings(the_repository);
 255         the_repository->settings.command_requires_full_index = 0;
 256
 257         if (repo_read_index(the_repository) < 0) {
 258                 die("invalid cache");
 259         }
 260
 261         argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 262                         builtin_checkout_index_usage, 0);
 263         state.istate = &the_index;
 264         state.force = force;
 265         state.quiet = quiet;
 266         state.not_new = not_new;
 267
 268         if (!state.base_dir)
 269                 state.base_dir = "";
 270         state.base_dir_len = strlen(state.base_dir);
 271
 272         /*
 273          * when --prefix is specified we do not want to update cache.
 274          */
 275         if (index_opt && !state.base_dir_len && !to_tempfile) {
 276                 state.refresh_cache = 1;
 277                 state.istate = &the_index;
 278                 repo_hold_locked_index(the_repository, &lock_file,
 279                                        LOCK_DIE_ON_ERROR);
 280         }
 281
 282         get_parallel_checkout_configs(&pc_workers, &pc_threshold);
 283         if (pc_workers > 1)
 284                 init_parallel_checkout();
 285
 286         /* Check out named files first */
 287         for (i = 0; i < argc; i++) {
 288                 const char *arg = argv[i];
 289                 char *p;
 290
 291                 if (all)
 292                         die("git checkout-index: don't mix '--all' and explicit filenames");
 293                 if (read_from_stdin)
 294                         die("git checkout-index: don't mix '--stdin' and explicit filenames");
 295                 p = prefix_path(prefix, prefix_length, arg);
 296                 err |= checkout_file(p, prefix);
 297                 free(p);
 298         }
 299
 300         if (read_from_stdin) {
 301                 struct strbuf buf = STRBUF_INIT;
 302                 struct strbuf unquoted = STRBUF_INIT;
 303                 strbuf_getline_fn getline_fn;
 304
 305                 if (all)
 306                         die("git checkout-index: don't mix '--all' and '--stdin'");
 307
 308                 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 309                 while (getline_fn(&buf, stdin) != EOF) {
 310                         char *p;
 311                         if (!nul_term_line && buf.buf[0] == '"') {
 312                                 strbuf_reset(&unquoted);
 313                                 if (unquote_c_style(&unquoted, buf.buf, NULL))
 314                                         die("line is badly quoted");
 315                                 strbuf_swap(&buf, &unquoted);
 316                         }
 317                         p = prefix_path(prefix, prefix_length, buf.buf);
 318                         err |= checkout_file(p, prefix);
 319                         free(p);
 320                 }
 321                 strbuf_release(&unquoted);
 322                 strbuf_release(&buf);
 323         }
 324
 325         if (all)
 326                 err |= checkout_all(prefix, prefix_length);
 327
 328         if (pc_workers > 1)
 329                 err |= run_parallel_checkout(&state, pc_workers, pc_threshold,
 330                                              NULL, NULL);
 331
 332         if (err)
 333                 return 1;
 334
 335         if (is_lock_file_locked(&lock_file) &&
 336             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 337                 die("Unable to write new index file");
 338         return 0;
 339 }