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