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][PATH_MAX + 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         "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         if (*newfd < 0)
 139                 *newfd = hold_locked_index(&lock_file, 1);
 140         return 0;
 141 }
 142
 143 static int option_parse_z(const struct option *opt,
 144                           const char *arg, int unset)
 145 {
 146         if (unset)
 147                 line_termination = '\n';
 148         else
 149                 line_termination = 0;
 150         return 0;
 151 }
 152
 153 static int option_parse_prefix(const struct option *opt,
 154                                const char *arg, int unset)
 155 {
 156         state.base_dir = arg;
 157         state.base_dir_len = strlen(arg);
 158         return 0;
 159 }
 160
 161 static int option_parse_stage(const struct option *opt,
 162                               const char *arg, int unset)
 163 {
 164         if (!strcmp(arg, "all")) {
 165                 to_tempfile = 1;
 166                 checkout_stage = CHECKOUT_ALL;
 167         } else {
 168                 int ch = arg[0];
 169                 if ('1' <= ch && ch <= '3')
 170                         checkout_stage = arg[0] - '0';
 171                 else
 172                         die("stage should be between 1 and 3 or all");
 173         }
 174         return 0;
 175 }
 176
 177 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 178 {
 179         int i;
 180         int newfd = -1;
 181         int all = 0;
 182         int read_from_stdin = 0;
 183         int prefix_length;
 184         int force = 0, quiet = 0, not_new = 0;
 185         struct option builtin_checkout_index_options[] = {
 186                 OPT_BOOLEAN('a', "all", &all,
 187                         "checks out all files in the index"),
 188                 OPT__FORCE(&force, "forces overwrite of existing files"),
 189                 OPT__QUIET(&quiet,
 190                         "no warning for existing files and files not in index"),
 191                 OPT_BOOLEAN('n', "no-create", &not_new,
 192                         "don't checkout new files"),
 193                 { OPTION_CALLBACK, 'u', "index", &newfd, NULL,
 194                         "update stat information in the index file",
 195                         PARSE_OPT_NOARG, option_parse_u },
 196                 { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
 197                         "paths are separated with NUL character",
 198                         PARSE_OPT_NOARG, option_parse_z },
 199                 OPT_BOOLEAN(0, "stdin", &read_from_stdin,
 200                         "read list of paths from the standard input"),
 201                 OPT_BOOLEAN(0, "temp", &to_tempfile,
 202                         "write the content to temporary files"),
 203                 OPT_CALLBACK(0, "prefix", NULL, "string",
 204                         "when creating files, prepend <string>",
 205                         option_parse_prefix),
 206                 OPT_CALLBACK(0, "stage", NULL, NULL,
 207                         "copy out the files from named stage",
 208                         option_parse_stage),
 209                 OPT_END()
 210         };
 211
 212         if (argc == 2 && !strcmp(argv[1], "-h"))
 213                 usage_with_options(builtin_checkout_index_usage,
 214                                    builtin_checkout_index_options);
 215         git_config(git_default_config, NULL);
 216         state.base_dir = "";
 217         prefix_length = prefix ? strlen(prefix) : 0;
 218
 219         if (read_cache() < 0) {
 220                 die("invalid cache");
 221         }
 222
 223         argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 224                         builtin_checkout_index_usage, 0);
 225         state.force = force;
 226         state.quiet = quiet;
 227         state.not_new = not_new;
 228
 229         if (state.base_dir_len || to_tempfile) {
 230                 /* when --prefix is specified we do not
 231                  * want to update cache.
 232                  */
 233                 if (state.refresh_cache) {
 234                         rollback_lock_file(&lock_file);
 235                         newfd = -1;
 236                 }
 237                 state.refresh_cache = 0;
 238         }
 239
 240         /* Check out named files first */
 241         for (i = 0; i < argc; i++) {
 242                 const char *arg = argv[i];
 243                 const char *p;
 244
 245                 if (all)
 246                         die("git checkout-index: don't mix '--all' and explicit filenames");
 247                 if (read_from_stdin)
 248                         die("git checkout-index: don't mix '--stdin' and explicit filenames");
 249                 p = prefix_path(prefix, prefix_length, arg);
 250                 checkout_file(p, prefix_length);
 251                 if (p < arg || p > arg + strlen(arg))
 252                         free((char *)p);
 253         }
 254
 255         if (read_from_stdin) {
 256                 struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
 257
 258                 if (all)
 259                         die("git checkout-index: don't mix '--all' and '--stdin'");
 260
 261                 while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
 262                         const char *p;
 263                         if (line_termination && 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_length);
 271                         if (p < buf.buf || p > buf.buf + buf.len)
 272                                 free((char *)p);
 273                 }
 274                 strbuf_release(&nbuf);
 275                 strbuf_release(&buf);
 276         }
 277
 278         if (all)
 279                 checkout_all(prefix, prefix_length);
 280
 281         if (0 <= newfd &&
 282             (write_cache(newfd, active_cache, active_nr) ||
 283              commit_locked_index(&lock_file)))
 284                 die("Unable to write new index file");
 285         return 0;
 286 }