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/*
* Check-out files from the "current cache directory"
*
* Copyright (C) 2005 Linus Torvalds
*
* Careful: order of argument flags does matter. For example,
*
* git-checkout-index -a -f file.c
*
* Will first check out all files listed in the cache (but not
* overwrite any old ones), and then force-checkout "file.c" a
* second time (ie that one _will_ overwrite any old contents
* with the same filename).
*
* Also, just doing "git-checkout-index" does nothing. You probably
* meant "git-checkout-index -a". And if you want to force it, you
* want "git-checkout-index -f -a".
*
* Intuitiveness is not the goal here. Repeatability is. The
* reason for the "no arguments means no work" thing is that
* from scripts you are supposed to be able to do things like
*
* find . -name '*.h' -print0 | xargs -0 git-checkout-index -f --
*
* which will force all existing *.h files to be replaced with
* their cached copies. If an empty command line implied "all",
* then this would force-refresh everything in the cache, which
* was not the point.
*
* Oh, and the "--" is just a good idea when you know the rest
* will be filenames. Just so that you wouldn't have a filename
* of "-a" causing problems (not possible in the above example,
* but get used to it in scripting!).
*/
#include "cache.h"
static const char *prefix;
static int prefix_length;
static int checkout_stage; /* default to checkout stage0 */
static struct checkout state = {
.base_dir = "",
.base_dir_len = 0,
.force = 0,
.quiet = 0,
.not_new = 0,
.refresh_cache = 0,
};
static int checkout_file(const char *name)
{
int namelen = strlen(name);
int pos = cache_name_pos(name, namelen);
int has_same_name = 0;
if (pos < 0)
pos = -pos - 1;
while (pos < active_nr) {
struct cache_entry *ce = active_cache[pos];
if (ce_namelen(ce) != namelen &&
memcmp(ce->name, name, namelen))
break;
has_same_name = 1;
if (checkout_stage == ce_stage(ce))
return checkout_entry(ce, &state);
pos++;
}
if (!state.quiet) {
fprintf(stderr, "git-checkout-index: %s ", name);
if (!has_same_name)
fprintf(stderr, "is not in the cache");
else if (checkout_stage)
fprintf(stderr, "does not exist at stage %d",
checkout_stage);
else
fprintf(stderr, "is unmerged");
fputc('\n', stderr);
}
return -1;
}
static int checkout_all(void)
{
int i, errs = 0;
for (i = 0; i < active_nr ; i++) {
struct cache_entry *ce = active_cache[i];
if (ce_stage(ce) != checkout_stage)
continue;
if (prefix && *prefix &&
(ce_namelen(ce) <= prefix_length ||
memcmp(prefix, ce->name, prefix_length)))
continue;
if (checkout_entry(ce, &state) < 0)
errs++;
}
if (errs)
/* we have already done our error reporting.
* exit with the same code as die().
*/
exit(128);
return 0;
}
static const char checkout_cache_usage[] =
"git-checkout-index [-u] [-q] [-a] [-f] [-n] [--stage=[123]] [--prefix=<string>] [--] <file>...";
static struct cache_file cache_file;
int main(int argc, char **argv)
{
int i;
int newfd = -1;
int all = 0;
prefix = setup_git_directory();
prefix_length = prefix ? strlen(prefix) : 0;
if (read_cache() < 0) {
die("invalid cache");
}
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--")) {
i++;
break;
}
if (!strcmp(arg, "-a") || !strcmp(arg, "--all")) {
all = 1;
continue;
}
if (!strcmp(arg, "-f") || !strcmp(arg, "--force")) {
state.force = 1;
continue;
}
if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
state.quiet = 1;
continue;
}
if (!strcmp(arg, "-n") || !strcmp(arg, "--no-create")) {
state.not_new = 1;
continue;
}
if (!strcmp(arg, "-u") || !strcmp(arg, "--index")) {
state.refresh_cache = 1;
if (newfd < 0)
newfd = hold_index_file_for_update
(&cache_file,
get_index_file());
if (newfd < 0)
die("cannot open index.lock file.");
continue;
}
if (!strncmp(arg, "--prefix=", 9)) {
state.base_dir = arg+9;
state.base_dir_len = strlen(state.base_dir);
continue;
}
if (!strncmp(arg, "--stage=", 8)) {
int ch = arg[8];
if ('1' <= ch && ch <= '3')
checkout_stage = arg[8] - '0';
else
die("stage should be between 1 and 3");
continue;
}
if (arg[0] == '-')
usage(checkout_cache_usage);
break;
}
if (state.base_dir_len) {
/* when --prefix is specified we do not
* want to update cache.
*/
if (state.refresh_cache) {
close(newfd); newfd = -1;
rollback_index_file(&cache_file);
}
state.refresh_cache = 0;
}
/* Check out named files first */
for ( ; i < argc; i++) {
const char *arg = argv[i];
if (all)
die("git-checkout-index: don't mix '--all' and explicit filenames");
checkout_file(prefix_path(prefix, prefix_length, arg));
}
if (all)
checkout_all();
if (0 <= newfd &&
(write_cache(newfd, active_cache, active_nr) ||
commit_index_file(&cache_file)))
die("Unable to write new cachefile");
return 0;
}
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