Andrew's git - gitweb.git/blob - 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
  14static int nul_term_line;
  15static int checkout_stage; /* default to checkout stage0 */
  16static int to_tempfile;
  17static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
  18
  19static struct checkout state;
  20
  21static 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
  46static 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
  93static 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
 126static const char * const builtin_checkout_index_usage[] = {
 127        N_("git checkout-index [<options>] [--] [<file>...]"),
 128        NULL
 129};
 130
 131static struct lock_file lock_file;
 132
 133static 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
 145static int option_parse_z(const struct option *opt,
 146                          const char *arg, int unset)
 147{
 148        nul_term_line = !unset;
 149        return 0;
 150}
 151
 152static int option_parse_prefix(const struct option *opt,
 153                               const char *arg, int unset)
 154{
 155        state.base_dir = arg;
 156        state.base_dir_len = strlen(arg);
 157        return 0;
 158}
 159
 160static int option_parse_stage(const struct option *opt,
 161                              const char *arg, int unset)
 162{
 163        if (!strcmp(arg, "all")) {
 164                to_tempfile = 1;
 165                checkout_stage = CHECKOUT_ALL;
 166        } else {
 167                int ch = arg[0];
 168                if ('1' <= ch && ch <= '3')
 169                        checkout_stage = arg[0] - '0';
 170                else
 171                        die("stage should be between 1 and 3 or all");
 172        }
 173        return 0;
 174}
 175
 176int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 177{
 178        int i;
 179        int newfd = -1;
 180        int all = 0;
 181        int read_from_stdin = 0;
 182        int prefix_length;
 183        int force = 0, quiet = 0, not_new = 0;
 184        struct option builtin_checkout_index_options[] = {
 185                OPT_BOOL('a', "all", &all,
 186                        N_("check out all files in the index")),
 187                OPT__FORCE(&force, N_("force overwrite of existing files")),
 188                OPT__QUIET(&quiet,
 189                        N_("no warning for existing files and files not in index")),
 190                OPT_BOOL('n', "no-create", &not_new,
 191                        N_("don't checkout new files")),
 192                { OPTION_CALLBACK, 'u', "index", &newfd, NULL,
 193                        N_("update stat information in the index file"),
 194                        PARSE_OPT_NOARG, option_parse_u },
 195                { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
 196                        N_("paths are separated with NUL character"),
 197                        PARSE_OPT_NOARG, option_parse_z },
 198                OPT_BOOL(0, "stdin", &read_from_stdin,
 199                        N_("read list of paths from the standard input")),
 200                OPT_BOOL(0, "temp", &to_tempfile,
 201                        N_("write the content to temporary files")),
 202                OPT_CALLBACK(0, "prefix", NULL, N_("string"),
 203                        N_("when creating files, prepend <string>"),
 204                        option_parse_prefix),
 205                OPT_CALLBACK(0, "stage", NULL, NULL,
 206                        N_("copy out the files from named stage"),
 207                        option_parse_stage),
 208                OPT_END()
 209        };
 210
 211        if (argc == 2 && !strcmp(argv[1], "-h"))
 212                usage_with_options(builtin_checkout_index_usage,
 213                                   builtin_checkout_index_options);
 214        git_config(git_default_config, NULL);
 215        state.base_dir = "";
 216        prefix_length = prefix ? strlen(prefix) : 0;
 217
 218        if (read_cache() < 0) {
 219                die("invalid cache");
 220        }
 221
 222        argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 223                        builtin_checkout_index_usage, 0);
 224        state.force = force;
 225        state.quiet = quiet;
 226        state.not_new = not_new;
 227
 228        if (state.base_dir_len || to_tempfile) {
 229                /* when --prefix is specified we do not
 230                 * want to update cache.
 231                 */
 232                if (state.refresh_cache) {
 233                        rollback_lock_file(&lock_file);
 234                        newfd = -1;
 235                }
 236                state.refresh_cache = 0;
 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                checkout_file(p, prefix);
 250                free(p);
 251        }
 252
 253        if (read_from_stdin) {
 254                struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
 255                strbuf_getline_fn getline_fn;
 256
 257                if (all)
 258                        die("git checkout-index: don't mix '--all' and '--stdin'");
 259
 260                getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 261                while (getline_fn(&buf, stdin) != EOF) {
 262                        char *p;
 263                        if (!nul_term_line && 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);
 271                        free(p);
 272                }
 273                strbuf_release(&nbuf);
 274                strbuf_release(&buf);
 275        }
 276
 277        if (all)
 278                checkout_all(prefix, prefix_length);
 279
 280        if (0 <= newfd &&
 281            write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 282                die("Unable to write new index file");
 283        return 0;
 284}