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 "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
  15static int nul_term_line;
  16static int checkout_stage; /* default to checkout stage0 */
  17static int to_tempfile;
  18static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
  19
  20static struct checkout state = CHECKOUT_INIT;
  21
  22static 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
  47static 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,
  71                                   NULL) < 0)
  72                        errs++;
  73        }
  74
  75        if (did_checkout) {
  76                if (to_tempfile)
  77                        write_tempfile_record(name, prefix);
  78                return errs > 0 ? -1 : 0;
  79        }
  80
  81        if (!state.quiet) {
  82                fprintf(stderr, "git checkout-index: %s ", name);
  83                if (!has_same_name)
  84                        fprintf(stderr, "is not in the cache");
  85                else if (checkout_stage)
  86                        fprintf(stderr, "does not exist at stage %d",
  87                                checkout_stage);
  88                else
  89                        fprintf(stderr, "is unmerged");
  90                fputc('\n', stderr);
  91        }
  92        return -1;
  93}
  94
  95static void checkout_all(const char *prefix, int prefix_length)
  96{
  97        int i, errs = 0;
  98        struct cache_entry *last_ce = NULL;
  99
 100        for (i = 0; i < active_nr ; i++) {
 101                struct cache_entry *ce = active_cache[i];
 102                if (ce_stage(ce) != checkout_stage
 103                    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
 104                        continue;
 105                if (prefix && *prefix &&
 106                    (ce_namelen(ce) <= prefix_length ||
 107                     memcmp(prefix, ce->name, prefix_length)))
 108                        continue;
 109                if (last_ce && to_tempfile) {
 110                        if (ce_namelen(last_ce) != ce_namelen(ce)
 111                            || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
 112                                write_tempfile_record(last_ce->name, prefix);
 113                }
 114                if (checkout_entry(ce, &state,
 115                                   to_tempfile ? topath[ce_stage(ce)] : NULL,
 116                                   NULL) < 0)
 117                        errs++;
 118                last_ce = ce;
 119        }
 120        if (last_ce && to_tempfile)
 121                write_tempfile_record(last_ce->name, prefix);
 122        if (errs)
 123                /* we have already done our error reporting.
 124                 * exit with the same code as die().
 125                 */
 126                exit(128);
 127}
 128
 129static const char * const builtin_checkout_index_usage[] = {
 130        N_("git checkout-index [<options>] [--] [<file>...]"),
 131        NULL
 132};
 133
 134static int option_parse_stage(const struct option *opt,
 135                              const char *arg, int unset)
 136{
 137        BUG_ON_OPT_NEG(unset);
 138
 139        if (!strcmp(arg, "all")) {
 140                to_tempfile = 1;
 141                checkout_stage = CHECKOUT_ALL;
 142        } else {
 143                int ch = arg[0];
 144                if ('1' <= ch && ch <= '3')
 145                        checkout_stage = arg[0] - '0';
 146                else
 147                        die(_("stage should be between 1 and 3 or all"));
 148        }
 149        return 0;
 150}
 151
 152int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 153{
 154        int i;
 155        struct lock_file lock_file = LOCK_INIT;
 156        int all = 0;
 157        int read_from_stdin = 0;
 158        int prefix_length;
 159        int force = 0, quiet = 0, not_new = 0;
 160        int index_opt = 0;
 161        struct option builtin_checkout_index_options[] = {
 162                OPT_BOOL('a', "all", &all,
 163                        N_("check out all files in the index")),
 164                OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
 165                OPT__QUIET(&quiet,
 166                        N_("no warning for existing files and files not in index")),
 167                OPT_BOOL('n', "no-create", &not_new,
 168                        N_("don't checkout new files")),
 169                OPT_BOOL('u', "index", &index_opt,
 170                         N_("update stat information in the index file")),
 171                OPT_BOOL('z', NULL, &nul_term_line,
 172                        N_("paths are separated with NUL character")),
 173                OPT_BOOL(0, "stdin", &read_from_stdin,
 174                        N_("read list of paths from the standard input")),
 175                OPT_BOOL(0, "temp", &to_tempfile,
 176                        N_("write the content to temporary files")),
 177                OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
 178                        N_("when creating files, prepend <string>")),
 179                { OPTION_CALLBACK, 0, "stage", NULL, "(1|2|3|all)",
 180                        N_("copy out the files from named stage"),
 181                        PARSE_OPT_NONEG, option_parse_stage },
 182                OPT_END()
 183        };
 184
 185        if (argc == 2 && !strcmp(argv[1], "-h"))
 186                usage_with_options(builtin_checkout_index_usage,
 187                                   builtin_checkout_index_options);
 188        git_config(git_default_config, NULL);
 189        prefix_length = prefix ? strlen(prefix) : 0;
 190
 191        if (read_cache() < 0) {
 192                die("invalid cache");
 193        }
 194
 195        argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 196                        builtin_checkout_index_usage, 0);
 197        state.istate = &the_index;
 198        state.force = force;
 199        state.quiet = quiet;
 200        state.not_new = not_new;
 201
 202        if (!state.base_dir)
 203                state.base_dir = "";
 204        state.base_dir_len = strlen(state.base_dir);
 205
 206        /*
 207         * when --prefix is specified we do not want to update cache.
 208         */
 209        if (index_opt && !state.base_dir_len && !to_tempfile) {
 210                state.refresh_cache = 1;
 211                state.istate = &the_index;
 212                hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 213        }
 214
 215        /* Check out named files first */
 216        for (i = 0; i < argc; i++) {
 217                const char *arg = argv[i];
 218                char *p;
 219
 220                if (all)
 221                        die("git checkout-index: don't mix '--all' and explicit filenames");
 222                if (read_from_stdin)
 223                        die("git checkout-index: don't mix '--stdin' and explicit filenames");
 224                p = prefix_path(prefix, prefix_length, arg);
 225                checkout_file(p, prefix);
 226                free(p);
 227        }
 228
 229        if (read_from_stdin) {
 230                struct strbuf buf = STRBUF_INIT;
 231                struct strbuf unquoted = STRBUF_INIT;
 232                strbuf_getline_fn getline_fn;
 233
 234                if (all)
 235                        die("git checkout-index: don't mix '--all' and '--stdin'");
 236
 237                getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 238                while (getline_fn(&buf, stdin) != EOF) {
 239                        char *p;
 240                        if (!nul_term_line && buf.buf[0] == '"') {
 241                                strbuf_reset(&unquoted);
 242                                if (unquote_c_style(&unquoted, buf.buf, NULL))
 243                                        die("line is badly quoted");
 244                                strbuf_swap(&buf, &unquoted);
 245                        }
 246                        p = prefix_path(prefix, prefix_length, buf.buf);
 247                        checkout_file(p, prefix);
 248                        free(p);
 249                }
 250                strbuf_release(&unquoted);
 251                strbuf_release(&buf);
 252        }
 253
 254        if (all)
 255                checkout_all(prefix, prefix_length);
 256
 257        if (is_lock_file_locked(&lock_file) &&
 258            write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 259                die("Unable to write new index file");
 260        return 0;
 261}