checkout-index.con commit sha1_file.c: make sure packs in an alternate odb is named properly. (1494e03)
   1/*
   2 * Check-out files from the "current cache directory"
   3 *
   4 * Copyright (C) 2005 Linus Torvalds
   5 *
   6 * Careful: order of argument flags does matter. For example,
   7 *
   8 *      git-checkout-index -a -f file.c
   9 *
  10 * Will first check out all files listed in the cache (but not
  11 * overwrite any old ones), and then force-checkout "file.c" a
  12 * second time (ie that one _will_ overwrite any old contents
  13 * with the same filename).
  14 *
  15 * Also, just doing "git-checkout-index" does nothing. You probably
  16 * meant "git-checkout-index -a". And if you want to force it, you
  17 * want "git-checkout-index -f -a".
  18 *
  19 * Intuitiveness is not the goal here. Repeatability is. The
  20 * reason for the "no arguments means no work" thing is that
  21 * from scripts you are supposed to be able to do things like
  22 *
  23 *      find . -name '*.h' -print0 | xargs -0 git-checkout-index -f --
  24 *
  25 * which will force all existing *.h files to be replaced with
  26 * their cached copies. If an empty command line implied "all",
  27 * then this would force-refresh everything in the cache, which
  28 * was not the point.
  29 *
  30 * Oh, and the "--" is just a good idea when you know the rest
  31 * will be filenames. Just so that you wouldn't have a filename
  32 * of "-a" causing problems (not possible in the above example,
  33 * but get used to it in scripting!).
  34 */
  35#include "cache.h"
  36
  37static const char *prefix;
  38static int prefix_length;
  39
  40static struct checkout state = {
  41        .base_dir = "",
  42        .base_dir_len = 0,
  43        .force = 0,
  44        .quiet = 0,
  45        .not_new = 0,
  46        .refresh_cache = 0,
  47};
  48
  49static int checkout_file(const char *name)
  50{
  51        int pos = cache_name_pos(name, strlen(name));
  52        if (pos < 0) {
  53                if (!state.quiet) {
  54                        pos = -pos - 1;
  55                        fprintf(stderr,
  56                                "git-checkout-index: %s is %s.\n",
  57                                name,
  58                                (pos < active_nr &&
  59                                 !strcmp(active_cache[pos]->name, name)) ?
  60                                "unmerged" : "not in the cache");
  61                }
  62                return -1;
  63        }
  64        return checkout_entry(active_cache[pos], &state);
  65}
  66
  67static int checkout_all(void)
  68{
  69        int i, errs = 0;
  70
  71        for (i = 0; i < active_nr ; i++) {
  72                struct cache_entry *ce = active_cache[i];
  73                if (ce_stage(ce))
  74                        continue;
  75                if (prefix && *prefix &&
  76                    ( ce_namelen(ce) <= prefix_length ||
  77                      memcmp(prefix, ce->name, prefix_length) ))
  78                        continue;
  79                if (checkout_entry(ce, &state) < 0)
  80                        errs++;
  81        }
  82        if (errs)
  83                /* we have already done our error reporting.
  84                 * exit with the same code as die().
  85                 */
  86                exit(128);
  87        return 0;
  88}
  89
  90static const char checkout_cache_usage[] =
  91"git-checkout-index [-u] [-q] [-a] [-f] [-n] [--prefix=<string>] [--] <file>...";
  92
  93static struct cache_file cache_file;
  94
  95int main(int argc, char **argv)
  96{
  97        int i;
  98        int newfd = -1;
  99        int all = 0;
 100
 101        prefix = setup_git_directory();
 102        prefix_length = prefix ? strlen(prefix) : 0;
 103
 104        if (read_cache() < 0) {
 105                die("invalid cache");
 106        }
 107
 108        for (i = 1; i < argc; i++) {
 109                const char *arg = argv[i];
 110
 111                if (!strcmp(arg, "--")) {
 112                        i++;
 113                        break;
 114                }
 115                if (!strcmp(arg, "-a") || !strcmp(arg, "--all")) {
 116                        all = 1;
 117                        continue;
 118                }
 119                if (!strcmp(arg, "-f") || !strcmp(arg, "--force")) {
 120                        state.force = 1;
 121                        continue;
 122                }
 123                if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
 124                        state.quiet = 1;
 125                        continue;
 126                }
 127                if (!strcmp(arg, "-n") || !strcmp(arg, "--no-create")) {
 128                        state.not_new = 1;
 129                        continue;
 130                }
 131                if (!strcmp(arg, "-u") || !strcmp(arg, "--index")) {
 132                        state.refresh_cache = 1;
 133                        if (newfd < 0)
 134                                newfd = hold_index_file_for_update
 135                                        (&cache_file,
 136                                         get_index_file());
 137                        if (newfd < 0)
 138                                die("cannot open index.lock file.");
 139                        continue;
 140                }
 141                if (!memcmp(arg, "--prefix=", 9)) {
 142                        state.base_dir = arg+9;
 143                        state.base_dir_len = strlen(state.base_dir);
 144                        continue;
 145                }
 146                if (arg[0] == '-')
 147                        usage(checkout_cache_usage);
 148                break;
 149        }
 150
 151        if (state.base_dir_len) {
 152                /* when --prefix is specified we do not
 153                 * want to update cache.
 154                 */
 155                if (state.refresh_cache) {
 156                        close(newfd); newfd = -1;
 157                        rollback_index_file(&cache_file);
 158                }
 159                state.refresh_cache = 0;
 160        }
 161
 162        /* Check out named files first */
 163        for ( ; i < argc; i++) {
 164                const char *arg = argv[i];
 165
 166                if (all)
 167                        die("git-checkout-index: don't mix '--all' and explicit filenames");
 168                checkout_file(prefix_path(prefix, prefix_length, arg));
 169        }
 170
 171        if (all)
 172                checkout_all();
 173
 174        if (0 <= newfd &&
 175            (write_cache(newfd, active_cache, active_nr) ||
 176             commit_index_file(&cache_file)))
 177                die("Unable to write new cachefile");
 178        return 0;
 179}