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 "cache.h"
   9#include "quote.h"
  10#include "cache-tree.h"
  11#include "parse-options.h"
  12
  13#define CHECKOUT_ALL 4
  14static int line_termination = '\n';
  15static int checkout_stage; /* default to checkout stage0 */
  16static int to_tempfile;
  17static char topath[4][PATH_MAX + 1];
  18
  19static struct checkout state;
  20
  21static void write_tempfile_record(const char *name, int prefix_length)
  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(name + prefix_length, stdout, line_termination);
  39
  40        for (i = 0; i < 4; i++) {
  41                topath[i][0] = 0;
  42        }
  43}
  44
  45static int checkout_file(const char *name, int prefix_length)
  46{
  47        int namelen = strlen(name);
  48        int pos = cache_name_pos(name, namelen);
  49        int has_same_name = 0;
  50        int did_checkout = 0;
  51        int errs = 0;
  52
  53        if (pos < 0)
  54                pos = -pos - 1;
  55
  56        while (pos < active_nr) {
  57                struct cache_entry *ce = active_cache[pos];
  58                if (ce_namelen(ce) != namelen ||
  59                    memcmp(ce->name, name, namelen))
  60                        break;
  61                has_same_name = 1;
  62                pos++;
  63                if (ce_stage(ce) != checkout_stage
  64                    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
  65                        continue;
  66                did_checkout = 1;
  67                if (checkout_entry(ce, &state,
  68                    to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
  69                        errs++;
  70        }
  71
  72        if (did_checkout) {
  73                if (to_tempfile)
  74                        write_tempfile_record(name, prefix_length);
  75                return errs > 0 ? -1 : 0;
  76        }
  77
  78        if (!state.quiet) {
  79                fprintf(stderr, "git checkout-index: %s ", name);
  80                if (!has_same_name)
  81                        fprintf(stderr, "is not in the cache");
  82                else if (checkout_stage)
  83                        fprintf(stderr, "does not exist at stage %d",
  84                                checkout_stage);
  85                else
  86                        fprintf(stderr, "is unmerged");
  87                fputc('\n', stderr);
  88        }
  89        return -1;
  90}
  91
  92static void checkout_all(const char *prefix, int prefix_length)
  93{
  94        int i, errs = 0;
  95        struct cache_entry *last_ce = NULL;
  96
  97        for (i = 0; i < active_nr ; i++) {
  98                struct cache_entry *ce = active_cache[i];
  99                if (ce_stage(ce) != checkout_stage
 100                    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
 101                        continue;
 102                if (prefix && *prefix &&
 103                    (ce_namelen(ce) <= prefix_length ||
 104                     memcmp(prefix, ce->name, prefix_length)))
 105                        continue;
 106                if (last_ce && to_tempfile) {
 107                        if (ce_namelen(last_ce) != ce_namelen(ce)
 108                            || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
 109                                write_tempfile_record(last_ce->name, prefix_length);
 110                }
 111                if (checkout_entry(ce, &state,
 112                    to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
 113                        errs++;
 114                last_ce = ce;
 115        }
 116        if (last_ce && to_tempfile)
 117                write_tempfile_record(last_ce->name, prefix_length);
 118        if (errs)
 119                /* we have already done our error reporting.
 120                 * exit with the same code as die().
 121                 */
 122                exit(128);
 123}
 124
 125static const char * const builtin_checkout_index_usage[] = {
 126        "git checkout-index [options] [--] [<file>...]",
 127        NULL
 128};
 129
 130static struct lock_file lock_file;
 131
 132static int option_parse_u(const struct option *opt,
 133                              const char *arg, int unset)
 134{
 135        int *newfd = opt->value;
 136
 137        state.refresh_cache = 1;
 138        if (*newfd < 0)
 139                *newfd = hold_locked_index(&lock_file, 1);
 140        return 0;
 141}
 142
 143static int option_parse_z(const struct option *opt,
 144                          const char *arg, int unset)
 145{
 146        if (unset)
 147                line_termination = '\n';
 148        else
 149                line_termination = 0;
 150        return 0;
 151}
 152
 153static int option_parse_prefix(const struct option *opt,
 154                               const char *arg, int unset)
 155{
 156        state.base_dir = arg;
 157        state.base_dir_len = strlen(arg);
 158        return 0;
 159}
 160
 161static int option_parse_stage(const struct option *opt,
 162                              const char *arg, int unset)
 163{
 164        if (!strcmp(arg, "all")) {
 165                to_tempfile = 1;
 166                checkout_stage = CHECKOUT_ALL;
 167        } else {
 168                int ch = arg[0];
 169                if ('1' <= ch && ch <= '3')
 170                        checkout_stage = arg[0] - '0';
 171                else
 172                        die("stage should be between 1 and 3 or all");
 173        }
 174        return 0;
 175}
 176
 177int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 178{
 179        int i;
 180        int newfd = -1;
 181        int all = 0;
 182        int read_from_stdin = 0;
 183        int prefix_length;
 184        int force = 0, quiet = 0, not_new = 0;
 185        struct option builtin_checkout_index_options[] = {
 186                OPT_BOOLEAN('a', "all", &all,
 187                        "checks out all files in the index"),
 188                OPT__FORCE(&force, "forces overwrite of existing files"),
 189                OPT__QUIET(&quiet,
 190                        "no warning for existing files and files not in index"),
 191                OPT_BOOLEAN('n', "no-create", &not_new,
 192                        "don't checkout new files"),
 193                { OPTION_CALLBACK, 'u', "index", &newfd, NULL,
 194                        "update stat information in the index file",
 195                        PARSE_OPT_NOARG, option_parse_u },
 196                { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
 197                        "paths are separated with NUL character",
 198                        PARSE_OPT_NOARG, option_parse_z },
 199                OPT_BOOLEAN(0, "stdin", &read_from_stdin,
 200                        "read list of paths from the standard input"),
 201                OPT_BOOLEAN(0, "temp", &to_tempfile,
 202                        "write the content to temporary files"),
 203                OPT_CALLBACK(0, "prefix", NULL, "string",
 204                        "when creating files, prepend <string>",
 205                        option_parse_prefix),
 206                OPT_CALLBACK(0, "stage", NULL, NULL,
 207                        "copy out the files from named stage",
 208                        option_parse_stage),
 209                OPT_END()
 210        };
 211
 212        if (argc == 2 && !strcmp(argv[1], "-h"))
 213                usage_with_options(builtin_checkout_index_usage,
 214                                   builtin_checkout_index_options);
 215        git_config(git_default_config, NULL);
 216        state.base_dir = "";
 217        prefix_length = prefix ? strlen(prefix) : 0;
 218
 219        if (read_cache() < 0) {
 220                die("invalid cache");
 221        }
 222
 223        argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 224                        builtin_checkout_index_usage, 0);
 225        state.force = force;
 226        state.quiet = quiet;
 227        state.not_new = not_new;
 228
 229        if (state.base_dir_len || to_tempfile) {
 230                /* when --prefix is specified we do not
 231                 * want to update cache.
 232                 */
 233                if (state.refresh_cache) {
 234                        rollback_lock_file(&lock_file);
 235                        newfd = -1;
 236                }
 237                state.refresh_cache = 0;
 238        }
 239
 240        /* Check out named files first */
 241        for (i = 0; i < argc; i++) {
 242                const char *arg = argv[i];
 243                const char *p;
 244
 245                if (all)
 246                        die("git checkout-index: don't mix '--all' and explicit filenames");
 247                if (read_from_stdin)
 248                        die("git checkout-index: don't mix '--stdin' and explicit filenames");
 249                p = prefix_path(prefix, prefix_length, arg);
 250                checkout_file(p, prefix_length);
 251                if (p < arg || p > arg + strlen(arg))
 252                        free((char *)p);
 253        }
 254
 255        if (read_from_stdin) {
 256                struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
 257
 258                if (all)
 259                        die("git checkout-index: don't mix '--all' and '--stdin'");
 260
 261                while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
 262                        const char *p;
 263                        if (line_termination && 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_length);
 271                        if (p < buf.buf || p > buf.buf + buf.len)
 272                                free((char *)p);
 273                }
 274                strbuf_release(&nbuf);
 275                strbuf_release(&buf);
 276        }
 277
 278        if (all)
 279                checkout_all(prefix, prefix_length);
 280
 281        if (0 <= newfd &&
 282            (write_cache(newfd, active_cache, active_nr) ||
 283             commit_locked_index(&lock_file)))
 284                die("Unable to write new index file");
 285        return 0;
 286}