2 * Check-out files from the "current cache directory"
4 * Copyright (C) 2005 Linus Torvalds
6 * Careful: order of argument flags does matter. For example,
8 * checkout-cache -a -f file.c
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).
15 * Also, just doing "checkout-cache" does nothing. You probably
16 * meant "checkout-cache -a". And if you want to force it, you
17 * want "checkout-cache -f -a".
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
23 * find . -name '*.h' -print0 | xargs -0 checkout-cache -f --
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
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!).
37 static int force = 0, quiet = 0;
39 static int write_entry(struct cache_entry *ce)
46 new = read_sha1_file(ce->sha1, "blob", &size);
48 fprintf(stderr, "checkout-cache: unable to read sha1 file of %s (%s)",
49 ce->name, sha1_to_hex(ce->sha1));
52 fd = open(ce->name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
54 fprintf(stderr, "checkout-cache: unable to create %s (%s)",
55 ce->name, strerror(errno));
59 wrote = write(fd, new, size);
64 fprintf(stderr, "checkout-cache: unable to write %s", ce->name);
68 static int checkout_entry(struct cache_entry *ce)
73 if (!stat(ce->name, &st)) {
74 unsigned changed = cache_match_stat(ce, &st);
78 fprintf(stderr, "checkout-cache: %s already exists", ce->name);
82 return write_entry(ce);
85 static int checkout_file(const char *name)
87 int pos = cache_name_pos(name, strlen(name));
90 fprintf(stderr, "checkout-cache: %s is not in the cache", name);
93 return checkout_entry(active_cache[pos]);
96 static int checkout_all(void)
100 for (i = 0; i < active_nr ; i++) {
101 struct cache_entry *ce = active_cache[i];
102 if (checkout_entry(ce) < 0)
108 int main(int argc, char **argv)
110 int i, force_filename = 0;
112 if (read_cache() < 0) {
113 fprintf(stderr, "Invalid cache");
117 for (i = 1; i < argc; i++) {
118 const char *arg = argv[i];
119 if (!force_filename) {
120 if (!strcmp(arg, "-a")) {
124 if (!strcmp(arg, "--")) {
128 if (!strcmp(arg, "-f")) {
132 if (!strcmp(arg, "-q")) {