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 #include "entry.h"
  15
  16 #define CHECKOUT_ALL 4
  17 static int nul_term_line;
  18 static int checkout_stage; /* default to checkout stage0 */
  19 static int to_tempfile;
  20 static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
  21
  22 static struct checkout state = CHECKOUT_INIT;
  23
  24 static void write_tempfile_record(const char *name, const char *prefix)
  25 {
  26         int i;
  27         int have_tempname = 0;
  28
  29         if (CHECKOUT_ALL == checkout_stage) {
  30                 for (i = 1; i < 4; i++)
  31                         if (topath[i][0]) {
  32                                 have_tempname = 1;
  33                                 break;
  34                         }
  35
  36                 if (have_tempname) {
  37                         for (i = 1; i < 4; i++) {
  38                                 if (i > 1)
  39                                         putchar(' ');
  40                                 if (topath[i][0])
  41                                         fputs(topath[i], stdout);
  42                                 else
  43                                         putchar('.');
  44                         }
  45                 }
  46         } else if (topath[checkout_stage][0]) {
  47                 have_tempname = 1;
  48                 fputs(topath[checkout_stage], stdout);
  49         }
  50
  51         if (have_tempname) {
  52                 putchar('\t');
  53                 write_name_quoted_relative(name, prefix, stdout,
  54                                            nul_term_line ? '\0' : '\n');
  55         }
  56
  57         for (i = 0; i < 4; i++) {
  58                 topath[i][0] = 0;
  59         }
  60 }
  61
  62 static int checkout_file(const char *name, const char *prefix)
  63 {
  64         int namelen = strlen(name);
  65         int pos = cache_name_pos(name, namelen);
  66         int has_same_name = 0;
  67         int did_checkout = 0;
  68         int errs = 0;
  69
  70         if (pos < 0)
  71                 pos = -pos - 1;
  72
  73         while (pos < active_nr) {
  74                 struct cache_entry *ce = active_cache[pos];
  75                 if (ce_namelen(ce) != namelen ||
  76                     memcmp(ce->name, name, namelen))
  77                         break;
  78                 has_same_name = 1;
  79                 pos++;
  80                 if (ce_stage(ce) != checkout_stage
  81                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
  82                         continue;
  83                 did_checkout = 1;
  84                 if (checkout_entry(ce, &state,
  85                                    to_tempfile ? topath[ce_stage(ce)] : NULL,
  86                                    NULL) < 0)
  87                         errs++;
  88         }
  89
  90         if (did_checkout) {
  91                 if (to_tempfile)
  92                         write_tempfile_record(name, prefix);
  93                 return errs > 0 ? -1 : 0;
  94         }
  95
  96         /*
  97          * At this point we know we didn't try to check anything out. If it was
  98          * because we did find an entry but it was stage 0, that's not an
  99          * error.
 100          */
 101         if (has_same_name && checkout_stage == CHECKOUT_ALL)
 102                 return 0;
 103
 104         if (!state.quiet) {
 105                 fprintf(stderr, "git checkout-index: %s ", name);
 106                 if (!has_same_name)
 107                         fprintf(stderr, "is not in the cache");
 108                 else if (checkout_stage)
 109                         fprintf(stderr, "does not exist at stage %d",
 110                                 checkout_stage);
 111                 else
 112                         fprintf(stderr, "is unmerged");
 113                 fputc('\n', stderr);
 114         }
 115         return -1;
 116 }
 117
 118 static void checkout_all(const char *prefix, int prefix_length)
 119 {
 120         int i, errs = 0;
 121         struct cache_entry *last_ce = NULL;
 122
 123         for (i = 0; i < active_nr ; i++) {
 124                 struct cache_entry *ce = active_cache[i];
 125                 if (ce_stage(ce) != checkout_stage
 126                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
 127                         continue;
 128                 if (prefix && *prefix &&
 129                     (ce_namelen(ce) <= prefix_length ||
 130                      memcmp(prefix, ce->name, prefix_length)))
 131                         continue;
 132                 if (last_ce && to_tempfile) {
 133                         if (ce_namelen(last_ce) != ce_namelen(ce)
 134                             || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
 135                                 write_tempfile_record(last_ce->name, prefix);
 136                 }
 137                 if (checkout_entry(ce, &state,
 138                                    to_tempfile ? topath[ce_stage(ce)] : NULL,
 139                                    NULL) < 0)
 140                         errs++;
 141                 last_ce = ce;
 142         }
 143         if (last_ce && to_tempfile)
 144                 write_tempfile_record(last_ce->name, prefix);
 145         if (errs)
 146                 /* we have already done our error reporting.
 147                  * exit with the same code as die().
 148                  */
 149                 exit(128);
 150 }
 151
 152 static const char * const builtin_checkout_index_usage[] = {
 153         N_("git checkout-index [<options>] [--] [<file>...]"),
 154         NULL
 155 };
 156
 157 static int option_parse_stage(const struct option *opt,
 158                               const char *arg, int unset)
 159 {
 160         BUG_ON_OPT_NEG(unset);
 161
 162         if (!strcmp(arg, "all")) {
 163                 to_tempfile = 1;
 164                 checkout_stage = CHECKOUT_ALL;
 165         } else {
 166                 int ch = arg[0];
 167                 if ('1' <= ch && ch <= '3')
 168                         checkout_stage = arg[0] - '0';
 169                 else
 170                         die(_("stage should be between 1 and 3 or all"));
 171         }
 172         return 0;
 173 }
 174
 175 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 176 {
 177         int i;
 178         struct lock_file lock_file = LOCK_INIT;
 179         int all = 0;
 180         int read_from_stdin = 0;
 181         int prefix_length;
 182         int force = 0, quiet = 0, not_new = 0;
 183         int index_opt = 0;
 184         int err = 0;
 185         struct option builtin_checkout_index_options[] = {
 186                 OPT_BOOL('a', "all", &all,
 187                         N_("check out all files in the index")),
 188                 OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
 189                 OPT__QUIET(&quiet,
 190                         N_("no warning for existing files and files not in index")),
 191                 OPT_BOOL('n', "no-create", &not_new,
 192                         N_("don't checkout new files")),
 193                 OPT_BOOL('u', "index", &index_opt,
 194                          N_("update stat information in the index file")),
 195                 OPT_BOOL('z', NULL, &nul_term_line,
 196                         N_("paths are separated with NUL character")),
 197                 OPT_BOOL(0, "stdin", &read_from_stdin,
 198                         N_("read list of paths from the standard input")),
 199                 OPT_BOOL(0, "temp", &to_tempfile,
 200                         N_("write the content to temporary files")),
 201                 OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
 202                         N_("when creating files, prepend <string>")),
 203                 OPT_CALLBACK_F(0, "stage", NULL, "(1|2|3|all)",
 204                         N_("copy out the files from named stage"),
 205                         PARSE_OPT_NONEG, option_parse_stage),
 206                 OPT_END()
 207         };
 208
 209         if (argc == 2 && !strcmp(argv[1], "-h"))
 210                 usage_with_options(builtin_checkout_index_usage,
 211                                    builtin_checkout_index_options);
 212         git_config(git_default_config, NULL);
 213         prefix_length = prefix ? strlen(prefix) : 0;
 214
 215         if (read_cache() < 0) {
 216                 die("invalid cache");
 217         }
 218
 219         argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 220                         builtin_checkout_index_usage, 0);
 221         state.istate = &the_index;
 222         state.force = force;
 223         state.quiet = quiet;
 224         state.not_new = not_new;
 225
 226         if (!state.base_dir)
 227                 state.base_dir = "";
 228         state.base_dir_len = strlen(state.base_dir);
 229
 230         /*
 231          * when --prefix is specified we do not want to update cache.
 232          */
 233         if (index_opt && !state.base_dir_len && !to_tempfile) {
 234                 state.refresh_cache = 1;
 235                 state.istate = &the_index;
 236                 hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 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                 err |= checkout_file(p, prefix);
 250                 free(p);
 251         }
 252
 253         if (read_from_stdin) {
 254                 struct strbuf buf = STRBUF_INIT;
 255                 struct strbuf unquoted = STRBUF_INIT;
 256                 strbuf_getline_fn getline_fn;
 257
 258                 if (all)
 259                         die("git checkout-index: don't mix '--all' and '--stdin'");
 260
 261                 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 262                 while (getline_fn(&buf, stdin) != EOF) {
 263                         char *p;
 264                         if (!nul_term_line && buf.buf[0] == '"') {
 265                                 strbuf_reset(&unquoted);
 266                                 if (unquote_c_style(&unquoted, buf.buf, NULL))
 267                                         die("line is badly quoted");
 268                                 strbuf_swap(&buf, &unquoted);
 269                         }
 270                         p = prefix_path(prefix, prefix_length, buf.buf);
 271                         err |= checkout_file(p, prefix);
 272                         free(p);
 273                 }
 274                 strbuf_release(&unquoted);
 275                 strbuf_release(&buf);
 276         }
 277
 278         if (err)
 279                 return 1;
 280
 281         if (all)
 282                 checkout_all(prefix, prefix_length);
 283
 284         if (is_lock_file_locked(&lock_file) &&
 285             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 286                 die("Unable to write new index file");
 287         return 0;
 288 }