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_prefix(const struct option *opt,
 146                                const char *arg, int unset)
 147 {
 148         state.base_dir = arg;
 149         state.base_dir_len = strlen(arg);
 150         return 0;
 151 }
 152
 153 static int option_parse_stage(const struct option *opt,
 154                               const char *arg, int unset)
 155 {
 156         if (!strcmp(arg, "all")) {
 157                 to_tempfile = 1;
 158                 checkout_stage = CHECKOUT_ALL;
 159         } else {
 160                 int ch = arg[0];
 161                 if ('1' <= ch && ch <= '3')
 162                         checkout_stage = arg[0] - '0';
 163                 else
 164                         die("stage should be between 1 and 3 or all");
 165         }
 166         return 0;
 167 }
 168
 169 int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 170 {
 171         int i;
 172         int newfd = -1;
 173         int all = 0;
 174         int read_from_stdin = 0;
 175         int prefix_length;
 176         int force = 0, quiet = 0, not_new = 0;
 177         struct option builtin_checkout_index_options[] = {
 178                 OPT_BOOL('a', "all", &all,
 179                         N_("check out all files in the index")),
 180                 OPT__FORCE(&force, N_("force overwrite of existing files")),
 181                 OPT__QUIET(&quiet,
 182                         N_("no warning for existing files and files not in index")),
 183                 OPT_BOOL('n', "no-create", &not_new,
 184                         N_("don't checkout new files")),
 185                 { OPTION_CALLBACK, 'u', "index", &newfd, NULL,
 186                         N_("update stat information in the index file"),
 187                         PARSE_OPT_NOARG, option_parse_u },
 188                 OPT_BOOL('z', NULL, &nul_term_line,
 189                         N_("paths are separated with NUL character")),
 190                 OPT_BOOL(0, "stdin", &read_from_stdin,
 191                         N_("read list of paths from the standard input")),
 192                 OPT_BOOL(0, "temp", &to_tempfile,
 193                         N_("write the content to temporary files")),
 194                 OPT_CALLBACK(0, "prefix", NULL, N_("string"),
 195                         N_("when creating files, prepend <string>"),
 196                         option_parse_prefix),
 197                 OPT_CALLBACK(0, "stage", NULL, NULL,
 198                         N_("copy out the files from named stage"),
 199                         option_parse_stage),
 200                 OPT_END()
 201         };
 202
 203         if (argc == 2 && !strcmp(argv[1], "-h"))
 204                 usage_with_options(builtin_checkout_index_usage,
 205                                    builtin_checkout_index_options);
 206         git_config(git_default_config, NULL);
 207         state.base_dir = "";
 208         prefix_length = prefix ? strlen(prefix) : 0;
 209
 210         if (read_cache() < 0) {
 211                 die("invalid cache");
 212         }
 213
 214         argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 215                         builtin_checkout_index_usage, 0);
 216         state.force = force;
 217         state.quiet = quiet;
 218         state.not_new = not_new;
 219
 220         if (state.base_dir_len || to_tempfile) {
 221                 /* when --prefix is specified we do not
 222                  * want to update cache.
 223                  */
 224                 if (state.refresh_cache) {
 225                         rollback_lock_file(&lock_file);
 226                         newfd = -1;
 227                 }
 228                 state.refresh_cache = 0;
 229         }
 230
 231         /* Check out named files first */
 232         for (i = 0; i < argc; i++) {
 233                 const char *arg = argv[i];
 234                 char *p;
 235
 236                 if (all)
 237                         die("git checkout-index: don't mix '--all' and explicit filenames");
 238                 if (read_from_stdin)
 239                         die("git checkout-index: don't mix '--stdin' and explicit filenames");
 240                 p = prefix_path(prefix, prefix_length, arg);
 241                 checkout_file(p, prefix);
 242                 free(p);
 243         }
 244
 245         if (read_from_stdin) {
 246                 struct strbuf buf = STRBUF_INIT;
 247                 struct strbuf unquoted = STRBUF_INIT;
 248                 strbuf_getline_fn getline_fn;
 249
 250                 if (all)
 251                         die("git checkout-index: don't mix '--all' and '--stdin'");
 252
 253                 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 254                 while (getline_fn(&buf, stdin) != EOF) {
 255                         char *p;
 256                         if (!nul_term_line && buf.buf[0] == '"') {
 257                                 strbuf_reset(&unquoted);
 258                                 if (unquote_c_style(&unquoted, buf.buf, NULL))
 259                                         die("line is badly quoted");
 260                                 strbuf_swap(&buf, &unquoted);
 261                         }
 262                         p = prefix_path(prefix, prefix_length, buf.buf);
 263                         checkout_file(p, prefix);
 264                         free(p);
 265                 }
 266                 strbuf_release(&unquoted);
 267                 strbuf_release(&buf);
 268         }
 269
 270         if (all)
 271                 checkout_all(prefix, prefix_length);
 272
 273         if (0 <= newfd &&
 274             write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 275                 die("Unable to write new index file");
 276         return 0;
 277 }