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