builtin/checkout-index.c

   1 /*
   2  * Check-out files from the "current cache directory"
   3  *
   4  * Copyright (C) 2005 Linus Torvalds
   5  *
   6  */
   7 #include "builtin.h"
   8 #include "lockfile.h"
   9 #include "quote.h"
  10 #include "cache-tree.h"
  11 #include "parse-options.h"
  12
  13 #define CHECKOUT_ALL 4
  14 static int nul_term_line;
  15 static int checkout_stage; /* default to checkout stage0 */
  16 static int to_tempfile;
  17 static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
  18
  19 static struct checkout state;
  20
  21 static void write_tempfile_record(const char *name, const char *prefix)
  22 {
  23         int i;
  24
  25         if (CHECKOUT_ALL == checkout_stage) {
  26                 for (i = 1; i < 4; i++) {
  27                         if (i > 1)
  28                                 putchar(' ');
  29                         if (topath[i][0])
  30                                 fputs(topath[i], stdout);
  31                         else
  32                                 putchar('.');
  33                 }
  34         } else
  35                 fputs(topath[checkout_stage], stdout);
  36
  37         putchar('\t');
  38         write_name_quoted_relative(name, prefix, stdout,
  39                                    nul_term_line ? '\0' : '\n');
  40
  41         for (i = 0; i < 4; i++) {
  42                 topath[i][0] = 0;
  43         }
  44 }
  45
  46 static int checkout_file(const char *name, const char *prefix)
  47 {
  48         int namelen = strlen(name);
  49         int pos = cache_name_pos(name, namelen);
  50         int has_same_name = 0;
  51         int did_checkout = 0;
  52         int errs = 0;
  53
  54         if (pos < 0)
  55                 pos = -pos - 1;
  56
  57         while (pos < active_nr) {
  58                 struct cache_entry *ce = active_cache[pos];
  59                 if (ce_namelen(ce) != namelen ||
  60                     memcmp(ce->name, name, namelen))
  61                         break;
  62                 has_same_name = 1;
  63                 pos++;
  64                 if (ce_stage(ce) != checkout_stage
  65                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
  66                         continue;
  67                 did_checkout = 1;
  68                 if (checkout_entry(ce, &state,
  69                     to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
  70                         errs++;
  71         }
  72
  73         if (did_checkout) {
  74                 if (to_tempfile)
  75                         write_tempfile_record(name, prefix);
  76                 return errs > 0 ? -1 : 0;
  77         }
  78
  79         if (!state.quiet) {
  80                 fprintf(stderr, "git checkout-index: %s ", name);
  81                 if (!has_same_name)
  82                         fprintf(stderr, "is not in the cache");
  83                 else if (checkout_stage)
  84                         fprintf(stderr, "does not exist at stage %d",
  85                                 checkout_stage);
  86                 else
  87                         fprintf(stderr, "is unmerged");
  88                 fputc('\n', stderr);
  89         }
  90         return -1;
  91 }
  92
  93 static void checkout_all(const char *prefix, int prefix_length)
  94 {
  95         int i, errs = 0;
  96         struct cache_entry *last_ce = NULL;
  97
  98         for (i = 0; i < active_nr ; i++) {
  99                 struct cache_entry *ce = active_cache[i];
 100                 if (ce_stage(ce) != checkout_stage
 101                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
 102                         continue;
 103                 if (prefix && *prefix &&
 104                     (ce_namelen(ce) <= prefix_length ||
 105                      memcmp(prefix, ce->name, prefix_length)))
 106                         continue;
 107                 if (last_ce && to_tempfile) {
 108                         if (ce_namelen(last_ce) != ce_namelen(ce)
 109                             || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
 110                                 write_tempfile_record(last_ce->name, prefix);
 111                 }
 112                 if (checkout_entry(ce, &state,
 113                     to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
 114                         errs++;
 115                 last_ce = ce;
 116         }
 117         if (last_ce && to_tempfile)
 118                 write_tempfile_record(last_ce->name, prefix);
 119         if (errs)
 120                 /* we have already done our error reporting.
 121                  * exit with the same code as die().
 122                  */
 123                 exit(128);
 124 }
 125
 126 static const char * const builtin_checkout_index_usage[] = {
 127         N_("git checkout-index [<options>] [--] [<file>...]"),
 128         NULL
 129 };
 130
 131 static struct lock_file lock_file;
 132
 133 static int option_parse_u(const struct option *opt,
 134                               const char *arg, int unset)
 135 {
 136         int *newfd = opt->value;
 137
 138         state.refresh_cache = 1;
 139         state.istate = &the_index;
 140         if (*newfd < 0)
 141                 *newfd = hold_locked_index(&lock_file, 1);
 142         return 0;
 143 }
 144
 145 static int option_parse_z(const struct option *opt,
 146                           const char *arg, int unset)
 147 {
 148         nul_term_line = !unset;
 149         return 0;
 150 }
 151
 152 static int option_parse_prefix(const struct option *opt,
 153                                const char *arg, int unset)
 154 {
 155         state.base_dir = arg;
 156         state.base_dir_len = strlen(arg);
 157         return 0;
 158 }
 159
 160 static int option_parse_stage(const struct option *opt,
 161                               const char *arg, int unset)
 162 {
 163         if (!strcmp(arg, "all")) {
 164                 to_tempfile = 1;
 165                 checkout_stage = CHECKOUT_ALL;
 166         } else {
 167                 int ch = arg[0];
 168                 if ('1' <= ch && ch <= '3')
 169                         checkout_stage = arg[0] - '0';
 170                 else
 171                         die("stage should be between 1 and 3 or all");
 172         }
 173         return 0;
 174 }
 175
 176 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 177 {
 178         int i;
 179         int newfd = -1;
 180         int all = 0;
 181         int read_from_stdin = 0;
 182         int prefix_length;
 183         int force = 0, quiet = 0, not_new = 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")),
 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                 { OPTION_CALLBACK, 'u', "index", &newfd, NULL,
 193                         N_("update stat information in the index file"),
 194                         PARSE_OPT_NOARG, option_parse_u },
 195                 { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
 196                         N_("paths are separated with NUL character"),
 197                         PARSE_OPT_NOARG, option_parse_z },
 198                 OPT_BOOL(0, "stdin", &read_from_stdin,
 199                         N_("read list of paths from the standard input")),
 200                 OPT_BOOL(0, "temp", &to_tempfile,
 201                         N_("write the content to temporary files")),
 202                 OPT_CALLBACK(0, "prefix", NULL, N_("string"),
 203                         N_("when creating files, prepend <string>"),
 204                         option_parse_prefix),
 205                 OPT_CALLBACK(0, "stage", NULL, NULL,
 206                         N_("copy out the files from named stage"),
 207                         option_parse_stage),
 208                 OPT_END()
 209         };
 210
 211         if (argc == 2 && !strcmp(argv[1], "-h"))
 212                 usage_with_options(builtin_checkout_index_usage,
 213                                    builtin_checkout_index_options);
 214         git_config(git_default_config, NULL);
 215         state.base_dir = "";
 216         prefix_length = prefix ? strlen(prefix) : 0;
 217
 218         if (read_cache() < 0) {
 219                 die("invalid cache");
 220         }
 221
 222         argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 223                         builtin_checkout_index_usage, 0);
 224         state.force = force;
 225         state.quiet = quiet;
 226         state.not_new = not_new;
 227
 228         if (state.base_dir_len || to_tempfile) {
 229                 /* when --prefix is specified we do not
 230                  * want to update cache.
 231                  */
 232                 if (state.refresh_cache) {
 233                         rollback_lock_file(&lock_file);
 234                         newfd = -1;
 235                 }
 236                 state.refresh_cache = 0;
 237         }
 238
 239         /* Check out named files first */
 240         for (i = 0; i < argc; i++) {
 241                 const char *arg = argv[i];
 242                 char *p;
 243
 244                 if (all)
 245                         die("git checkout-index: don't mix '--all' and explicit filenames");
 246                 if (read_from_stdin)
 247                         die("git checkout-index: don't mix '--stdin' and explicit filenames");
 248                 p = prefix_path(prefix, prefix_length, arg);
 249                 checkout_file(p, prefix);
 250                 free(p);
 251         }
 252
 253         if (read_from_stdin) {
 254                 struct strbuf buf = STRBUF_INIT, nbuf = 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(&nbuf);
 265                                 if (unquote_c_style(&nbuf, buf.buf, NULL))
 266                                         die("line is badly quoted");
 267                                 strbuf_swap(&buf, &nbuf);
 268                         }
 269                         p = prefix_path(prefix, prefix_length, buf.buf);
 270                         checkout_file(p, prefix);
 271                         free(p);
 272                 }
 273                 strbuf_release(&nbuf);
 274                 strbuf_release(&buf);
 275         }
 276
 277         if (all)
 278                 checkout_all(prefix, prefix_length);
 279
 280         if (0 <= newfd &&
 281             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 282                 die("Unable to write new index file");
 283         return 0;
 284 }