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 * git-checkout-index -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 "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".
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 git-checkout-index -f --
27 * find . -name '*.h' -print0 | git-checkout-index -f -z --stdin
29 * which will force all existing *.h files to be replaced with
30 * their cached copies. If an empty command line implied "all",
31 * then this would force-refresh everything in the cache, which
34 * Oh, and the "--" is just a good idea when you know the rest
35 * will be filenames. Just so that you wouldn't have a filename
36 * of "-a" causing problems (not possible in the above example,
37 * but get used to it in scripting!).
43 static const char *prefix;
44 static int prefix_length;
45 static int checkout_stage; /* default to checkout stage0 */
47 static struct checkout state = {
56 static int checkout_file(const char *name)
58 int namelen = strlen(name);
59 int pos = cache_name_pos(name, namelen);
60 int has_same_name = 0;
65 while (pos < active_nr) {
66 struct cache_entry *ce = active_cache[pos];
67 if (ce_namelen(ce) != namelen ||
68 memcmp(ce->name, name, namelen))
71 if (checkout_stage == ce_stage(ce))
72 return checkout_entry(ce, &state);
77 fprintf(stderr, "git-checkout-index: %s ", name);
79 fprintf(stderr, "is not in the cache");
80 else if (checkout_stage)
81 fprintf(stderr, "does not exist at stage %d",
84 fprintf(stderr, "is unmerged");
90 static int checkout_all(void)
94 for (i = 0; i < active_nr ; i++) {
95 struct cache_entry *ce = active_cache[i];
96 if (ce_stage(ce) != checkout_stage)
98 if (prefix && *prefix &&
99 (ce_namelen(ce) <= prefix_length ||
100 memcmp(prefix, ce->name, prefix_length)))
102 if (checkout_entry(ce, &state) < 0)
106 /* we have already done our error reporting.
107 * exit with the same code as die().
113 static const char checkout_cache_usage[] =
114 "git-checkout-index [-u] [-q] [-a] [-f] [-n] [--stage=[123]] [--prefix=<string>] [--] <file>...";
116 static struct cache_file cache_file;
118 int main(int argc, char **argv)
123 int read_from_stdin = 0;
124 int line_termination = '\n';
126 prefix = setup_git_directory();
127 git_config(git_default_config);
128 prefix_length = prefix ? strlen(prefix) : 0;
130 if (read_cache() < 0) {
131 die("invalid cache");
134 for (i = 1; i < argc; i++) {
135 const char *arg = argv[i];
137 if (!strcmp(arg, "--")) {
141 if (!strcmp(arg, "-a") || !strcmp(arg, "--all")) {
145 if (!strcmp(arg, "-f") || !strcmp(arg, "--force")) {
149 if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
153 if (!strcmp(arg, "-n") || !strcmp(arg, "--no-create")) {
157 if (!strcmp(arg, "-u") || !strcmp(arg, "--index")) {
158 state.refresh_cache = 1;
160 newfd = hold_index_file_for_update
164 die("cannot open index.lock file.");
167 if (!strcmp(arg, "-z")) {
168 line_termination = 0;
171 if (!strcmp(arg, "--stdin")) {
173 die("--stdin must be at the end");
175 i++; /* do not consider arg as a file name */
178 if (!strncmp(arg, "--prefix=", 9)) {
179 state.base_dir = arg+9;
180 state.base_dir_len = strlen(state.base_dir);
183 if (!strncmp(arg, "--stage=", 8)) {
185 if ('1' <= ch && ch <= '3')
186 checkout_stage = arg[8] - '0';
188 die("stage should be between 1 and 3");
192 usage(checkout_cache_usage);
196 if (state.base_dir_len) {
197 /* when --prefix is specified we do not
198 * want to update cache.
200 if (state.refresh_cache) {
201 close(newfd); newfd = -1;
202 rollback_index_file(&cache_file);
204 state.refresh_cache = 0;
207 /* Check out named files first */
208 for ( ; i < argc; i++) {
209 const char *arg = argv[i];
212 die("git-checkout-index: don't mix '--all' and explicit filenames");
214 die("git-checkout-index: don't mix '--stdin' and explicit filenames");
215 checkout_file(prefix_path(prefix, prefix_length, arg));
218 if (read_from_stdin) {
221 die("git-checkout-index: don't mix '--all' and '--stdin'");
225 read_line(&buf, stdin, line_termination);
228 if (line_termination && buf.buf[0] == '"')
229 path_name = unquote_c_style(buf.buf, NULL);
232 checkout_file(prefix_path(prefix, prefix_length, path_name));
233 if (path_name != buf.buf)
242 (write_cache(newfd, active_cache, active_nr) ||
243 commit_index_file(&cache_file)))
244 die("Unable to write new cachefile");