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