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Tip revision: 9159afbfce955db86373dab95b5f8e31fb763dae authored by Junio C Hamano on 06 May 2007, 08:07:04 UTC
GIT v1.5.2-rc2
GIT v1.5.2-rc2
Tip revision: 9159afb
builtin-write-tree.c
/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "builtin.h"
#include "cache.h"
#include "tree.h"
#include "cache-tree.h"
static const char write_tree_usage[] =
"git-write-tree [--missing-ok] [--prefix=<prefix>/]";
int write_tree(unsigned char *sha1, int missing_ok, const char *prefix)
{
int entries, was_valid, newfd;
/* We can't free this memory, it becomes part of a linked list parsed atexit() */
struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
newfd = hold_locked_index(lock_file, 1);
entries = read_cache();
if (entries < 0)
die("git-write-tree: error reading cache");
if (!active_cache_tree)
active_cache_tree = cache_tree();
was_valid = cache_tree_fully_valid(active_cache_tree);
if (!was_valid) {
if (cache_tree_update(active_cache_tree,
active_cache, active_nr,
missing_ok, 0) < 0)
die("git-write-tree: error building trees");
if (0 <= newfd) {
if (!write_cache(newfd, active_cache, active_nr)
&& !close(newfd)) {
commit_lock_file(lock_file);
newfd = -1;
}
}
/* Not being able to write is fine -- we are only interested
* in updating the cache-tree part, and if the next caller
* ends up using the old index with unupdated cache-tree part
* it misses the work we did here, but that is just a
* performance penalty and not a big deal.
*/
}
if (prefix) {
struct cache_tree *subtree =
cache_tree_find(active_cache_tree, prefix);
hashcpy(sha1, subtree->sha1);
}
else
hashcpy(sha1, active_cache_tree->sha1);
if (0 <= newfd)
close(newfd);
rollback_lock_file(lock_file);
return 0;
}
int cmd_write_tree(int argc, const char **argv, const char *unused_prefix)
{
int missing_ok = 0, ret;
const char *prefix = NULL;
unsigned char sha1[20];
while (1 < argc) {
const char *arg = argv[1];
if (!strcmp(arg, "--missing-ok"))
missing_ok = 1;
else if (!prefixcmp(arg, "--prefix="))
prefix = arg + 9;
else
usage(write_tree_usage);
argc--; argv++;
}
if (argc > 2)
die("too many options");
ret = write_tree(sha1, missing_ok, prefix);
printf("%s\n", sha1_to_hex(sha1));
return ret;
}