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 "config.h"
   9 #include "lockfile.h"
  10 #include "quote.h"
  11 #include "cache-tree.h"
  12 #include "parse-options.h"
  13
  14 #define CHECKOUT_ALL 4
  15 static int nul_term_line;
  16 static int checkout_stage; /* default to checkout stage0 */
  17 static int to_tempfile;
  18 static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
  19
  20 static struct checkout state = CHECKOUT_INIT;
  21
  22 static void write_tempfile_record(const char *name, const char *prefix)
  23 {
  24         int i;
  25
  26         if (CHECKOUT_ALL == checkout_stage) {
  27                 for (i = 1; i < 4; i++) {
  28                         if (i > 1)
  29                                 putchar(' ');
  30                         if (topath[i][0])
  31                                 fputs(topath[i], stdout);
  32                         else
  33                                 putchar('.');
  34                 }
  35         } else
  36                 fputs(topath[checkout_stage], stdout);
  37
  38         putchar('\t');
  39         write_name_quoted_relative(name, prefix, stdout,
  40                                    nul_term_line ? '\0' : '\n');
  41
  42         for (i = 0; i < 4; i++) {
  43                 topath[i][0] = 0;
  44         }
  45 }
  46
  47 static int checkout_file(const char *name, const char *prefix)
  48 {
  49         int namelen = strlen(name);
  50         int pos = cache_name_pos(name, namelen);
  51         int has_same_name = 0;
  52         int did_checkout = 0;
  53         int errs = 0;
  54
  55         if (pos < 0)
  56                 pos = -pos - 1;
  57
  58         while (pos < active_nr) {
  59                 struct cache_entry *ce = active_cache[pos];
  60                 if (ce_namelen(ce) != namelen ||
  61                     memcmp(ce->name, name, namelen))
  62                         break;
  63                 has_same_name = 1;
  64                 pos++;
  65                 if (ce_stage(ce) != checkout_stage
  66                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
  67                         continue;
  68                 did_checkout = 1;
  69                 if (checkout_entry(ce, &state,
  70                     to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
  71                         errs++;
  72         }
  73
  74         if (did_checkout) {
  75                 if (to_tempfile)
  76                         write_tempfile_record(name, prefix);
  77                 return errs > 0 ? -1 : 0;
  78         }
  79
  80         if (!state.quiet) {
  81                 fprintf(stderr, "git checkout-index: %s ", name);
  82                 if (!has_same_name)
  83                         fprintf(stderr, "is not in the cache");
  84                 else if (checkout_stage)
  85                         fprintf(stderr, "does not exist at stage %d",
  86                                 checkout_stage);
  87                 else
  88                         fprintf(stderr, "is unmerged");
  89                 fputc('\n', stderr);
  90         }
  91         return -1;
  92 }
  93
  94 static void checkout_all(const char *prefix, int prefix_length)
  95 {
  96         int i, errs = 0;
  97         struct cache_entry *last_ce = NULL;
  98
  99         for (i = 0; i < active_nr ; i++) {
 100                 struct cache_entry *ce = active_cache[i];
 101                 if (ce_stage(ce) != checkout_stage
 102                     && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
 103                         continue;
 104                 if (prefix && *prefix &&
 105                     (ce_namelen(ce) <= prefix_length ||
 106                      memcmp(prefix, ce->name, prefix_length)))
 107                         continue;
 108                 if (last_ce && to_tempfile) {
 109                         if (ce_namelen(last_ce) != ce_namelen(ce)
 110                             || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
 111                                 write_tempfile_record(last_ce->name, prefix);
 112                 }
 113                 if (checkout_entry(ce, &state,
 114                     to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
 115                         errs++;
 116                 last_ce = ce;
 117         }
 118         if (last_ce && to_tempfile)
 119                 write_tempfile_record(last_ce->name, prefix);
 120         if (errs)
 121                 /* we have already done our error reporting.
 122                  * exit with the same code as die().
 123                  */
 124                 exit(128);
 125 }
 126
 127 static const char * const builtin_checkout_index_usage[] = {
 128         N_("git checkout-index [<options>] [--] [<file>...]"),
 129         NULL
 130 };
 131
 132 static int option_parse_stage(const struct option *opt,
 133                               const char *arg, int unset)
 134 {
 135         BUG_ON_OPT_NEG(unset);
 136
 137         if (!strcmp(arg, "all")) {
 138                 to_tempfile = 1;
 139                 checkout_stage = CHECKOUT_ALL;
 140         } else {
 141                 int ch = arg[0];
 142                 if ('1' <= ch && ch <= '3')
 143                         checkout_stage = arg[0] - '0';
 144                 else
 145                         die(_("stage should be between 1 and 3 or all"));
 146         }
 147         return 0;
 148 }
 149
 150 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 151 {
 152         int i;
 153         struct lock_file lock_file = LOCK_INIT;
 154         int all = 0;
 155         int read_from_stdin = 0;
 156         int prefix_length;
 157         int force = 0, quiet = 0, not_new = 0;
 158         int index_opt = 0;
 159         struct option builtin_checkout_index_options[] = {
 160                 OPT_BOOL('a', "all", &all,
 161                         N_("check out all files in the index")),
 162                 OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
 163                 OPT__QUIET(&quiet,
 164                         N_("no warning for existing files and files not in index")),
 165                 OPT_BOOL('n', "no-create", &not_new,
 166                         N_("don't checkout new files")),
 167                 OPT_BOOL('u', "index", &index_opt,
 168                          N_("update stat information in the index file")),
 169                 OPT_BOOL('z', NULL, &nul_term_line,
 170                         N_("paths are separated with NUL character")),
 171                 OPT_BOOL(0, "stdin", &read_from_stdin,
 172                         N_("read list of paths from the standard input")),
 173                 OPT_BOOL(0, "temp", &to_tempfile,
 174                         N_("write the content to temporary files")),
 175                 OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
 176                         N_("when creating files, prepend <string>")),
 177                 { OPTION_CALLBACK, 0, "stage", NULL, "(1|2|3|all)",
 178                         N_("copy out the files from named stage"),
 179                         PARSE_OPT_NONEG, option_parse_stage },
 180                 OPT_END()
 181         };
 182
 183         if (argc == 2 && !strcmp(argv[1], "-h"))
 184                 usage_with_options(builtin_checkout_index_usage,
 185                                    builtin_checkout_index_options);
 186         git_config(git_default_config, NULL);
 187         prefix_length = prefix ? strlen(prefix) : 0;
 188
 189         if (read_cache() < 0) {
 190                 die("invalid cache");
 191         }
 192
 193         argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 194                         builtin_checkout_index_usage, 0);
 195         state.istate = &the_index;
 196         state.force = force;
 197         state.quiet = quiet;
 198         state.not_new = not_new;
 199
 200         if (!state.base_dir)
 201                 state.base_dir = "";
 202         state.base_dir_len = strlen(state.base_dir);
 203
 204         /*
 205          * when --prefix is specified we do not want to update cache.
 206          */
 207         if (index_opt && !state.base_dir_len && !to_tempfile) {
 208                 state.refresh_cache = 1;
 209                 state.istate = &the_index;
 210                 hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 211         }
 212
 213         /* Check out named files first */
 214         for (i = 0; i < argc; i++) {
 215                 const char *arg = argv[i];
 216                 char *p;
 217
 218                 if (all)
 219                         die("git checkout-index: don't mix '--all' and explicit filenames");
 220                 if (read_from_stdin)
 221                         die("git checkout-index: don't mix '--stdin' and explicit filenames");
 222                 p = prefix_path(prefix, prefix_length, arg);
 223                 checkout_file(p, prefix);
 224                 free(p);
 225         }
 226
 227         if (read_from_stdin) {
 228                 struct strbuf buf = STRBUF_INIT;
 229                 struct strbuf unquoted = STRBUF_INIT;
 230                 strbuf_getline_fn getline_fn;
 231
 232                 if (all)
 233                         die("git checkout-index: don't mix '--all' and '--stdin'");
 234
 235                 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 236                 while (getline_fn(&buf, stdin) != EOF) {
 237                         char *p;
 238                         if (!nul_term_line && buf.buf[0] == '"') {
 239                                 strbuf_reset(&unquoted);
 240                                 if (unquote_c_style(&unquoted, buf.buf, NULL))
 241                                         die("line is badly quoted");
 242                                 strbuf_swap(&buf, &unquoted);
 243                         }
 244                         p = prefix_path(prefix, prefix_length, buf.buf);
 245                         checkout_file(p, prefix);
 246                         free(p);
 247                 }
 248                 strbuf_release(&unquoted);
 249                 strbuf_release(&buf);
 250         }
 251
 252         if (all)
 253                 checkout_all(prefix, prefix_length);
 254
 255         if (is_lock_file_locked(&lock_file) &&
 256             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 257                 die("Unable to write new index file");
 258         return 0;
 259 }