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#define USE_THE_INDEX_COMPATIBILITY_MACROS
   8#include "builtin.h"
   9#include "config.h"
  10#include "lockfile.h"
  11#include "quote.h"
  12#include "cache-tree.h"
  13#include "parse-options.h"
  14
  15#define CHECKOUT_ALL 4
  16static int nul_term_line;
  17static int checkout_stage; /* default to checkout stage0 */
  18static int to_tempfile;
  19static char topath[4][TEMPORARY_FILENAME_LENGTH + 1];
  20
  21static struct checkout state = CHECKOUT_INIT;
  22
  23static void write_tempfile_record(const char *name, const char *prefix)
  24{
  25        int i;
  26
  27        if (CHECKOUT_ALL == checkout_stage) {
  28                for (i = 1; i < 4; i++) {
  29                        if (i > 1)
  30                                putchar(' ');
  31                        if (topath[i][0])
  32                                fputs(topath[i], stdout);
  33                        else
  34                                putchar('.');
  35                }
  36        } else
  37                fputs(topath[checkout_stage], stdout);
  38
  39        putchar('\t');
  40        write_name_quoted_relative(name, prefix, stdout,
  41                                   nul_term_line ? '\0' : '\n');
  42
  43        for (i = 0; i < 4; i++) {
  44                topath[i][0] = 0;
  45        }
  46}
  47
  48static int checkout_file(const char *name, const char *prefix)
  49{
  50        int namelen = strlen(name);
  51        int pos = cache_name_pos(name, namelen);
  52        int has_same_name = 0;
  53        int did_checkout = 0;
  54        int errs = 0;
  55
  56        if (pos < 0)
  57                pos = -pos - 1;
  58
  59        while (pos < active_nr) {
  60                struct cache_entry *ce = active_cache[pos];
  61                if (ce_namelen(ce) != namelen ||
  62                    memcmp(ce->name, name, namelen))
  63                        break;
  64                has_same_name = 1;
  65                pos++;
  66                if (ce_stage(ce) != checkout_stage
  67                    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
  68                        continue;
  69                did_checkout = 1;
  70                if (checkout_entry(ce, &state,
  71                                   to_tempfile ? topath[ce_stage(ce)] : NULL,
  72                                   NULL) < 0)
  73                        errs++;
  74        }
  75
  76        if (did_checkout) {
  77                if (to_tempfile)
  78                        write_tempfile_record(name, prefix);
  79                return errs > 0 ? -1 : 0;
  80        }
  81
  82        if (!state.quiet) {
  83                fprintf(stderr, "git checkout-index: %s ", name);
  84                if (!has_same_name)
  85                        fprintf(stderr, "is not in the cache");
  86                else if (checkout_stage)
  87                        fprintf(stderr, "does not exist at stage %d",
  88                                checkout_stage);
  89                else
  90                        fprintf(stderr, "is unmerged");
  91                fputc('\n', stderr);
  92        }
  93        return -1;
  94}
  95
  96static void checkout_all(const char *prefix, int prefix_length)
  97{
  98        int i, errs = 0;
  99        struct cache_entry *last_ce = NULL;
 100
 101        for (i = 0; i < active_nr ; i++) {
 102                struct cache_entry *ce = active_cache[i];
 103                if (ce_stage(ce) != checkout_stage
 104                    && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
 105                        continue;
 106                if (prefix && *prefix &&
 107                    (ce_namelen(ce) <= prefix_length ||
 108                     memcmp(prefix, ce->name, prefix_length)))
 109                        continue;
 110                if (last_ce && to_tempfile) {
 111                        if (ce_namelen(last_ce) != ce_namelen(ce)
 112                            || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
 113                                write_tempfile_record(last_ce->name, prefix);
 114                }
 115                if (checkout_entry(ce, &state,
 116                                   to_tempfile ? topath[ce_stage(ce)] : NULL,
 117                                   NULL) < 0)
 118                        errs++;
 119                last_ce = ce;
 120        }
 121        if (last_ce && to_tempfile)
 122                write_tempfile_record(last_ce->name, prefix);
 123        if (errs)
 124                /* we have already done our error reporting.
 125                 * exit with the same code as die().
 126                 */
 127                exit(128);
 128}
 129
 130static const char * const builtin_checkout_index_usage[] = {
 131        N_("git checkout-index [<options>] [--] [<file>...]"),
 132        NULL
 133};
 134
 135static int option_parse_stage(const struct option *opt,
 136                              const char *arg, int unset)
 137{
 138        BUG_ON_OPT_NEG(unset);
 139
 140        if (!strcmp(arg, "all")) {
 141                to_tempfile = 1;
 142                checkout_stage = CHECKOUT_ALL;
 143        } else {
 144                int ch = arg[0];
 145                if ('1' <= ch && ch <= '3')
 146                        checkout_stage = arg[0] - '0';
 147                else
 148                        die(_("stage should be between 1 and 3 or all"));
 149        }
 150        return 0;
 151}
 152
 153int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 154{
 155        int i;
 156        struct lock_file lock_file = LOCK_INIT;
 157        int all = 0;
 158        int read_from_stdin = 0;
 159        int prefix_length;
 160        int force = 0, quiet = 0, not_new = 0;
 161        int index_opt = 0;
 162        struct option builtin_checkout_index_options[] = {
 163                OPT_BOOL('a', "all", &all,
 164                        N_("check out all files in the index")),
 165                OPT__FORCE(&force, N_("force overwrite of existing files"), 0),
 166                OPT__QUIET(&quiet,
 167                        N_("no warning for existing files and files not in index")),
 168                OPT_BOOL('n', "no-create", &not_new,
 169                        N_("don't checkout new files")),
 170                OPT_BOOL('u', "index", &index_opt,
 171                         N_("update stat information in the index file")),
 172                OPT_BOOL('z', NULL, &nul_term_line,
 173                        N_("paths are separated with NUL character")),
 174                OPT_BOOL(0, "stdin", &read_from_stdin,
 175                        N_("read list of paths from the standard input")),
 176                OPT_BOOL(0, "temp", &to_tempfile,
 177                        N_("write the content to temporary files")),
 178                OPT_STRING(0, "prefix", &state.base_dir, N_("string"),
 179                        N_("when creating files, prepend <string>")),
 180                { OPTION_CALLBACK, 0, "stage", NULL, "(1|2|3|all)",
 181                        N_("copy out the files from named stage"),
 182                        PARSE_OPT_NONEG, option_parse_stage },
 183                OPT_END()
 184        };
 185
 186        if (argc == 2 && !strcmp(argv[1], "-h"))
 187                usage_with_options(builtin_checkout_index_usage,
 188                                   builtin_checkout_index_options);
 189        git_config(git_default_config, NULL);
 190        prefix_length = prefix ? strlen(prefix) : 0;
 191
 192        if (read_cache() < 0) {
 193                die("invalid cache");
 194        }
 195
 196        argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 197                        builtin_checkout_index_usage, 0);
 198        state.istate = &the_index;
 199        state.force = force;
 200        state.quiet = quiet;
 201        state.not_new = not_new;
 202
 203        if (!state.base_dir)
 204                state.base_dir = "";
 205        state.base_dir_len = strlen(state.base_dir);
 206
 207        /*
 208         * when --prefix is specified we do not want to update cache.
 209         */
 210        if (index_opt && !state.base_dir_len && !to_tempfile) {
 211                state.refresh_cache = 1;
 212                state.istate = &the_index;
 213                hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 214        }
 215
 216        /* Check out named files first */
 217        for (i = 0; i < argc; i++) {
 218                const char *arg = argv[i];
 219                char *p;
 220
 221                if (all)
 222                        die("git checkout-index: don't mix '--all' and explicit filenames");
 223                if (read_from_stdin)
 224                        die("git checkout-index: don't mix '--stdin' and explicit filenames");
 225                p = prefix_path(prefix, prefix_length, arg);
 226                checkout_file(p, prefix);
 227                free(p);
 228        }
 229
 230        if (read_from_stdin) {
 231                struct strbuf buf = STRBUF_INIT;
 232                struct strbuf unquoted = STRBUF_INIT;
 233                strbuf_getline_fn getline_fn;
 234
 235                if (all)
 236                        die("git checkout-index: don't mix '--all' and '--stdin'");
 237
 238                getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
 239                while (getline_fn(&buf, stdin) != EOF) {
 240                        char *p;
 241                        if (!nul_term_line && buf.buf[0] == '"') {
 242                                strbuf_reset(&unquoted);
 243                                if (unquote_c_style(&unquoted, buf.buf, NULL))
 244                                        die("line is badly quoted");
 245                                strbuf_swap(&buf, &unquoted);
 246                        }
 247                        p = prefix_path(prefix, prefix_length, buf.buf);
 248                        checkout_file(p, prefix);
 249                        free(p);
 250                }
 251                strbuf_release(&unquoted);
 252                strbuf_release(&buf);
 253        }
 254
 255        if (all)
 256                checkout_all(prefix, prefix_length);
 257
 258        if (is_lock_file_locked(&lock_file) &&
 259            write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 260                die("Unable to write new index file");
 261        return 0;
 262}