git/checkout-index.c
Johannes Schindelin 6244b24906 Close the index file between writing and committing
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-07-08 03:28:19 -07:00

318 lines
7.6 KiB
C

/*
* 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 --
*
* or:
*
* find . -name '*.h' -print0 | git-checkout-index -f -z --stdin
*
* 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"
#include "strbuf.h"
#include "quote.h"
#include "cache-tree.h"
#define CHECKOUT_ALL 4
static const char *prefix;
static int prefix_length;
static int line_termination = '\n';
static int checkout_stage; /* default to checkout stage0 */
static int to_tempfile;
static char topath[4][MAXPATHLEN+1];
static struct checkout state = {
.base_dir = "",
.base_dir_len = 0,
.force = 0,
.quiet = 0,
.not_new = 0,
.refresh_cache = 0,
};
static void write_tempfile_record (const char *name)
{
int i;
if (CHECKOUT_ALL == checkout_stage) {
for (i = 1; i < 4; i++) {
if (i > 1)
putchar(' ');
if (topath[i][0])
fputs(topath[i], stdout);
else
putchar('.');
}
} else
fputs(topath[checkout_stage], stdout);
putchar('\t');
write_name_quoted("", 0, name + prefix_length,
line_termination, stdout);
putchar(line_termination);
for (i = 0; i < 4; i++) {
topath[i][0] = 0;
}
}
static int checkout_file(const char *name)
{
int namelen = strlen(name);
int pos = cache_name_pos(name, namelen);
int has_same_name = 0;
int did_checkout = 0;
int errs = 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;
pos++;
if (ce_stage(ce) != checkout_stage
&& (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
continue;
did_checkout = 1;
if (checkout_entry(ce, &state,
to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
errs++;
}
if (did_checkout) {
if (to_tempfile)
write_tempfile_record(name);
return errs > 0 ? -1 : 0;
}
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;
struct cache_entry* last_ce = NULL;
for (i = 0; i < active_nr ; i++) {
struct cache_entry *ce = active_cache[i];
if (ce_stage(ce) != checkout_stage
&& (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
continue;
if (prefix && *prefix &&
(ce_namelen(ce) <= prefix_length ||
memcmp(prefix, ce->name, prefix_length)))
continue;
if (last_ce && to_tempfile) {
if (ce_namelen(last_ce) != ce_namelen(ce)
|| memcmp(last_ce->name, ce->name, ce_namelen(ce)))
write_tempfile_record(last_ce->name);
}
if (checkout_entry(ce, &state,
to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
errs++;
last_ce = ce;
}
if (last_ce && to_tempfile)
write_tempfile_record(last_ce->name);
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]|all] [--prefix=<string>] [--temp] [--] <file>...";
static struct lock_file lock_file;
int main(int argc, char **argv)
{
int i;
int newfd = -1;
int all = 0;
int read_from_stdin = 0;
prefix = setup_git_directory();
git_config(git_default_config);
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_lock_file_for_update
(&lock_file, get_index_file());
if (newfd < 0)
die("cannot open index.lock file.");
continue;
}
if (!strcmp(arg, "-z")) {
line_termination = 0;
continue;
}
if (!strcmp(arg, "--stdin")) {
if (i != argc - 1)
die("--stdin must be at the end");
read_from_stdin = 1;
i++; /* do not consider arg as a file name */
break;
}
if (!strcmp(arg, "--temp")) {
to_tempfile = 1;
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)) {
if (!strcmp(arg + 8, "all")) {
to_tempfile = 1;
checkout_stage = CHECKOUT_ALL;
} else {
int ch = arg[8];
if ('1' <= ch && ch <= '3')
checkout_stage = arg[8] - '0';
else
die("stage should be between 1 and 3 or all");
}
continue;
}
if (arg[0] == '-')
usage(checkout_cache_usage);
break;
}
if (state.base_dir_len || to_tempfile) {
/* when --prefix is specified we do not
* want to update cache.
*/
if (state.refresh_cache) {
close(newfd); newfd = -1;
rollback_lock_file(&lock_file);
}
state.refresh_cache = 0;
}
/* Check out named files first */
for ( ; i < argc; i++) {
const char *arg = argv[i];
const char *p;
if (all)
die("git-checkout-index: don't mix '--all' and explicit filenames");
if (read_from_stdin)
die("git-checkout-index: don't mix '--stdin' and explicit filenames");
p = prefix_path(prefix, prefix_length, arg);
checkout_file(p);
if (p < arg || p > arg + strlen(arg))
free((char*)p);
}
if (read_from_stdin) {
struct strbuf buf;
if (all)
die("git-checkout-index: don't mix '--all' and '--stdin'");
strbuf_init(&buf);
while (1) {
char *path_name;
const char *p;
read_line(&buf, stdin, line_termination);
if (buf.eof)
break;
if (line_termination && buf.buf[0] == '"')
path_name = unquote_c_style(buf.buf, NULL);
else
path_name = buf.buf;
p = prefix_path(prefix, prefix_length, path_name);
checkout_file(p);
if (p < path_name || p > path_name + strlen(path_name))
free((char *)p);
if (path_name != buf.buf)
free(path_name);
}
}
if (all)
checkout_all();
if (0 <= newfd &&
(write_cache(newfd, active_cache, active_nr) ||
close(newfd) || commit_lock_file(&lock_file)))
die("Unable to write new index file");
return 0;
}