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Revision 48679e5c2d059b9b198d6f414dd80aa921d23002 authored by Eric Wong on 28 February 2009, 03:40:16 UTC, committed by Junio C Hamano on 28 February 2009, 05:53:09 UTC 
git-svn: disable broken symlink workaround by default
 
Even though this will break things for some extremely rare repositories
used by broken Windows clients, it's probably not worth enabling this by
default as it has negatively affected many more users than it has helped
from what we've seen so far.

The extremely rare repositories that have broken symlinks in them will be
silently corrupted in import; but users can still reenable this option and
restart the import.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 48fce93
Raw File
tag.c 
#include "cache.h"
#include "tag.h"
#include "commit.h"
#include "tree.h"
#include "blob.h"

const char *tag_type = "tag";

struct object *deref_tag(struct object *o, const char *warn, int warnlen)
{
	while (o && o->type == OBJ_TAG)
		if (((struct tag *)o)->tagged)
			o = parse_object(((struct tag *)o)->tagged->sha1);
		else
			o = NULL;
	if (!o && warn) {
		if (!warnlen)
			warnlen = strlen(warn);
		error("missing object referenced by '%.*s'", warnlen, warn);
	}
	return o;
}

struct tag *lookup_tag(const unsigned char *sha1)
{
	struct object *obj = lookup_object(sha1);
	if (!obj)
		return create_object(sha1, OBJ_TAG, alloc_tag_node());
	if (!obj->type)
		obj->type = OBJ_TAG;
        if (obj->type != OBJ_TAG) {
                error("Object %s is a %s, not a tag",
                      sha1_to_hex(sha1), typename(obj->type));
                return NULL;
        }
        return (struct tag *) obj;
}

int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
{
	int typelen, taglen;
	unsigned char sha1[20];
	const char *type_line, *tag_line, *sig_line;
	char type[20];
	const char *start = data;

        if (item->object.parsed)
                return 0;
        item->object.parsed = 1;

	if (size < 64)
		return -1;
	if (memcmp("object ", data, 7) || get_sha1_hex((char *) data + 7, sha1))
		return -1;

	type_line = (char *) data + 48;
	if (memcmp("\ntype ", type_line-1, 6))
		return -1;

	tag_line = memchr(type_line, '\n', size - (type_line - start));
	if (!tag_line || memcmp("tag ", ++tag_line, 4))
		return -1;

	sig_line = memchr(tag_line, '\n', size - (tag_line - start));
	if (!sig_line)
		return -1;
	sig_line++;

	typelen = tag_line - type_line - strlen("type \n");
	if (typelen >= 20)
		return -1;
	memcpy(type, type_line + 5, typelen);
	type[typelen] = '\0';
	taglen = sig_line - tag_line - strlen("tag \n");
	item->tag = xmemdupz(tag_line + 4, taglen);

	if (!strcmp(type, blob_type)) {
		item->tagged = &lookup_blob(sha1)->object;
	} else if (!strcmp(type, tree_type)) {
		item->tagged = &lookup_tree(sha1)->object;
	} else if (!strcmp(type, commit_type)) {
		item->tagged = &lookup_commit(sha1)->object;
	} else if (!strcmp(type, tag_type)) {
		item->tagged = &lookup_tag(sha1)->object;
	} else {
		error("Unknown type %s", type);
		item->tagged = NULL;
	}

	return 0;
}

int parse_tag(struct tag *item)
{
	enum object_type type;
	void *data;
	unsigned long size;
	int ret;

	if (item->object.parsed)
		return 0;
	data = read_sha1_file(item->object.sha1, &type, &size);
	if (!data)
		return error("Could not read %s",
			     sha1_to_hex(item->object.sha1));
	if (type != OBJ_TAG) {
		free(data);
		return error("Object %s not a tag",
			     sha1_to_hex(item->object.sha1));
	}
	ret = parse_tag_buffer(item, data, size);
	free(data);
	return ret;
}
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