Revision ae5d8470f6b8e1abdef19bf033472c63fb72b735 authored by Marco Roeland on 05 April 2006, 20:28:28 UTC, committed by Junio C Hamano on 05 April 2006, 21:07:21 UTC
The "--amend" option is used to amend the tip of the current branch. This documentation text was copied straight from the commit that implemented it. Some minor format tweaks for asciidoc were taken from work by Francis Daly in commit b0d08a5.. It looks good now also in the html page. [jc: amended further to follow the recommendation by Francis in commit 3070b60]. Signed-off-by: Marco Roeland <marco.roeland@xs4all.nl> Signed-off-by: Junio C Hamano <junkio@cox.net>
1 parent 3ffe0c2
write-tree.c
/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
#include "tree.h"
static int missing_ok = 0;
static int check_valid_sha1(unsigned char *sha1)
{
int ret;
/* If we were anal, we'd check that the sha1 of the contents actually matches */
ret = has_sha1_file(sha1);
if (ret == 0)
perror(sha1_file_name(sha1));
return ret ? 0 : -1;
}
static int write_tree(struct cache_entry **cachep, int maxentries, const char *base, int baselen, unsigned char *returnsha1)
{
unsigned char subdir_sha1[20];
unsigned long size, offset;
char *buffer;
int nr;
/* Guess at some random initial size */
size = 8192;
buffer = xmalloc(size);
offset = 0;
nr = 0;
while (nr < maxentries) {
struct cache_entry *ce = cachep[nr];
const char *pathname = ce->name, *filename, *dirname;
int pathlen = ce_namelen(ce), entrylen;
unsigned char *sha1;
unsigned int mode;
/* Did we hit the end of the directory? Return how many we wrote */
if (baselen >= pathlen || memcmp(base, pathname, baselen))
break;
sha1 = ce->sha1;
mode = ntohl(ce->ce_mode);
/* Do we have _further_ subdirectories? */
filename = pathname + baselen;
dirname = strchr(filename, '/');
if (dirname) {
int subdir_written;
subdir_written = write_tree(cachep + nr, maxentries - nr, pathname, dirname-pathname+1, subdir_sha1);
nr += subdir_written;
/* Now we need to write out the directory entry into this tree.. */
mode = S_IFDIR;
pathlen = dirname - pathname;
/* ..but the directory entry doesn't count towards the total count */
nr--;
sha1 = subdir_sha1;
}
if (!missing_ok && check_valid_sha1(sha1) < 0)
exit(1);
entrylen = pathlen - baselen;
if (offset + entrylen + 100 > size) {
size = alloc_nr(offset + entrylen + 100);
buffer = xrealloc(buffer, size);
}
offset += sprintf(buffer + offset, "%o %.*s", mode, entrylen, filename);
buffer[offset++] = 0;
memcpy(buffer + offset, sha1, 20);
offset += 20;
nr++;
}
write_sha1_file(buffer, offset, tree_type, returnsha1);
free(buffer);
return nr;
}
static const char write_tree_usage[] = "git-write-tree [--missing-ok]";
int main(int argc, char **argv)
{
int i, funny;
int entries;
unsigned char sha1[20];
setup_git_directory();
entries = read_cache();
if (argc == 2) {
if (!strcmp(argv[1], "--missing-ok"))
missing_ok = 1;
else
die(write_tree_usage);
}
if (argc > 2)
die("too many options");
if (entries < 0)
die("git-write-tree: error reading cache");
/* Verify that the tree is merged */
funny = 0;
for (i = 0; i < entries; i++) {
struct cache_entry *ce = active_cache[i];
if (ce_stage(ce)) {
if (10 < ++funny) {
fprintf(stderr, "...\n");
break;
}
fprintf(stderr, "%s: unmerged (%s)\n", ce->name, sha1_to_hex(ce->sha1));
}
}
if (funny)
die("git-write-tree: not able to write tree");
/* Also verify that the cache does not have path and path/file
* at the same time. At this point we know the cache has only
* stage 0 entries.
*/
funny = 0;
for (i = 0; i < entries - 1; i++) {
/* path/file always comes after path because of the way
* the cache is sorted. Also path can appear only once,
* which means conflicting one would immediately follow.
*/
const char *this_name = active_cache[i]->name;
const char *next_name = active_cache[i+1]->name;
int this_len = strlen(this_name);
if (this_len < strlen(next_name) &&
strncmp(this_name, next_name, this_len) == 0 &&
next_name[this_len] == '/') {
if (10 < ++funny) {
fprintf(stderr, "...\n");
break;
}
fprintf(stderr, "You have both %s and %s\n",
this_name, next_name);
}
}
if (funny)
die("git-write-tree: not able to write tree");
/* Ok, write it out */
if (write_tree(active_cache, entries, "", 0, sha1) != entries)
die("git-write-tree: internal error");
printf("%s\n", sha1_to_hex(sha1));
return 0;
}
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