146 lines
3.4 KiB
C
146 lines
3.4 KiB
C
/*
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* Check-out files from the "current cache directory"
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*
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* Copyright (C) 2005 Linus Torvalds
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*
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* Careful: order of argument flags does matter. For example,
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*
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* git-checkout-cache -a -f file.c
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*
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* Will first check out all files listed in the cache (but not
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* overwrite any old ones), and then force-checkout "file.c" a
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* second time (ie that one _will_ overwrite any old contents
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* with the same filename).
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*
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* Also, just doing "git-checkout-cache" does nothing. You probably
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* meant "git-checkout-cache -a". And if you want to force it, you
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* want "git-checkout-cache -f -a".
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*
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* Intuitiveness is not the goal here. Repeatability is. The
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* reason for the "no arguments means no work" thing is that
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* from scripts you are supposed to be able to do things like
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*
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* find . -name '*.h' -print0 | xargs -0 git-checkout-cache -f --
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*
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* which will force all existing *.h files to be replaced with
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* their cached copies. If an empty command line implied "all",
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* then this would force-refresh everything in the cache, which
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* was not the point.
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*
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* Oh, and the "--" is just a good idea when you know the rest
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* will be filenames. Just so that you wouldn't have a filename
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* of "-a" causing problems (not possible in the above example,
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* but get used to it in scripting!).
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*/
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#include "cache.h"
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static struct checkout state = {
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.base_dir = "",
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.base_dir_len = 0,
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.force = 0,
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.quiet = 0,
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.not_new = 0,
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.refresh_cache = 0,
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};
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static int checkout_file(const char *name)
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{
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int pos = cache_name_pos(name, strlen(name));
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if (pos < 0) {
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if (!state.quiet) {
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pos = -pos - 1;
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fprintf(stderr,
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"git-checkout-cache: %s is %s.\n",
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name,
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(pos < active_nr &&
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!strcmp(active_cache[pos]->name, name)) ?
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"unmerged" : "not in the cache");
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}
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return -1;
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}
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return checkout_entry(active_cache[pos], &state);
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}
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static int checkout_all(void)
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{
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int i;
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for (i = 0; i < active_nr ; i++) {
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struct cache_entry *ce = active_cache[i];
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if (ce_stage(ce))
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continue;
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if (checkout_entry(ce, &state) < 0)
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return -1;
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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int i, force_filename = 0;
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struct cache_file cache_file;
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int newfd = -1;
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if (read_cache() < 0) {
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die("invalid cache");
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}
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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if (!force_filename) {
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if (!strcmp(arg, "-a")) {
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checkout_all();
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continue;
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}
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if (!strcmp(arg, "--")) {
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force_filename = 1;
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continue;
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}
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if (!strcmp(arg, "-f")) {
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state.force = 1;
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continue;
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}
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if (!strcmp(arg, "-q")) {
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state.quiet = 1;
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continue;
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}
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if (!strcmp(arg, "-n")) {
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state.not_new = 1;
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continue;
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}
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if (!strcmp(arg, "-u")) {
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state.refresh_cache = 1;
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if (newfd < 0)
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newfd = hold_index_file_for_update
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(&cache_file,
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get_index_file());
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if (newfd < 0)
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die("cannot open index.lock file.");
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continue;
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}
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if (!memcmp(arg, "--prefix=", 9)) {
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state.base_dir = arg+9;
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state.base_dir_len = strlen(state.base_dir);
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continue;
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}
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}
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if (state.base_dir_len) {
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/* when --prefix is specified we do not
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* want to update cache.
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*/
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if (state.refresh_cache) {
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close(newfd); newfd = -1;
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rollback_index_file(&cache_file);
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}
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state.refresh_cache = 0;
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}
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checkout_file(arg);
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}
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if (0 <= newfd &&
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(write_cache(newfd, active_cache, active_nr) ||
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commit_index_file(&cache_file)))
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die("Unable to write new cachefile");
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return 0;
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}
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