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/*
* Copyright (C) 2009-2012 the libgit2 contributors
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include <assert.h>
#include "git2/checkout.h"
#include "git2/repository.h"
#include "git2/refs.h"
#include "git2/tree.h"
#include "git2/commit.h"
#include "git2/blob.h"
#include "common.h"
#include "refs.h"
#include "buffer.h"
#include "repository.h"
#include "filter.h"
GIT_BEGIN_DECL
static int get_head_tree(git_tree **out, git_repository *repo)
{
int retcode = GIT_ERROR;
git_reference *head = NULL;
/* Dereference HEAD all the way to an OID ref */
if (!git_reference_lookup_resolved(&head, repo, GIT_HEAD_FILE, -1)) {
/* The OID should be a commit */
git_object *commit;
if (!git_object_lookup(&commit, repo,
git_reference_oid(head), GIT_OBJ_COMMIT)) {
/* Get the tree */
if (!git_commit_tree(out, (git_commit*)commit)) {
retcode = 0;
}
git_object_free(commit);
}
git_reference_free(head);
}
return retcode;
}
typedef struct tree_walk_data
{
git_indexer_stats *stats;
git_repository *repo;
} tree_walk_data;
static int count_walker(const char *path, git_tree_entry *entry, void *payload)
{
GIT_UNUSED(path);
GIT_UNUSED(entry);
((tree_walk_data*)payload)->stats->total++;
return 0;
}
static int apply_filters(git_buf *out,
git_vector *filters,
const void *data,
size_t len)
{
int retcode = GIT_ERROR;
git_buf_clear(out);
if (!filters->length) {
/* No filters to apply; just copy the result */
git_buf_put(out, data, len);
return 0;
}
git_buf origblob;
git_buf_attach(&origblob, (char*)data, len);
retcode = git_filters_apply(out, &origblob, filters);
git_buf_detach(&origblob);
return retcode;
}
static int blob_contents_to_file(git_repository *repo, git_buf *fnbuf, const git_oid *id, int mode)
{
int retcode = GIT_ERROR;
git_blob *blob;
if (!git_blob_lookup(&blob, repo, id)) {
const void *contents = git_blob_rawcontent(blob);
size_t len = git_blob_rawsize(blob);
git_vector filters = GIT_VECTOR_INIT;
int filter_count;
/* TODO: line-ending smudging */
filter_count = git_filters_load(&filters, repo,
git_buf_cstr(fnbuf),
GIT_FILTER_TO_WORKTREE);
printf("Got %d filters\n", filter_count);
if (filter_count >= 0) {
git_buf filteredblob = GIT_BUF_INIT;
if (!apply_filters(&filteredblob, &filters, contents, len)) {
int fd = git_futils_creat_withpath(git_buf_cstr(fnbuf),
GIT_DIR_MODE, mode);
if (fd >= 0) {
retcode = (!p_write(fd, contents, len)) ? 0 : GIT_ERROR;
p_close(fd);
}
}
}
git_blob_free(blob);
}
return retcode;
}
static int checkout_walker(const char *path, git_tree_entry *entry, void *payload)
{
int retcode = 0;
tree_walk_data *data = (tree_walk_data*)payload;
int attr = git_tree_entry_attributes(entry);
switch(git_tree_entry_type(entry)) {
case GIT_OBJ_TREE:
/* TODO: mkdir? */
break;
case GIT_OBJ_BLOB:
{
git_buf fnbuf = GIT_BUF_INIT;
git_buf_join_n(&fnbuf, '/', 3,
git_repository_workdir(data->repo),
path,
git_tree_entry_name(entry));
retcode = blob_contents_to_file(data->repo, &fnbuf, git_tree_entry_id(entry), attr);
git_buf_free(&fnbuf);
}
break;
default:
retcode = -1;
break;
}
data->stats->processed++;
return retcode;
}
/* TODO
* -> Line endings
*/
int git_checkout_force(git_repository *repo, git_indexer_stats *stats)
{
int retcode = GIT_ERROR;
git_indexer_stats dummy_stats;
git_tree *tree;
tree_walk_data payload;
assert(repo);
if (!stats) stats = &dummy_stats;
stats->total = stats->processed = 0;
payload.stats = stats;
payload.repo = repo;
if (!get_head_tree(&tree, repo)) {
/* Count all the tree nodes for progress information */
if (!git_tree_walk(tree, count_walker, GIT_TREEWALK_POST, &payload)) {
/* Checkout the files */
if (!git_tree_walk(tree, checkout_walker, GIT_TREEWALK_POST, &payload)) {
retcode = 0;
}
}
git_tree_free(tree);
}
return retcode;
}
GIT_END_DECL
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