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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"
#include "blob.h"
GIT_BEGIN_DECL
typedef struct tree_walk_data
{
git_indexer_stats *stats;
git_repository *repo;
git_odb *odb;
} tree_walk_data;
static int unfiltered_blob_contents(git_buf *out, git_repository *repo, const git_oid *blob_id)
{
int retcode = GIT_ERROR;
git_blob *blob;
if (!(retcode = git_blob_lookup(&blob, repo, blob_id)))
retcode = git_blob__getbuf(out, blob);
return retcode;
}
static int filtered_blob_contents(git_buf *out, git_repository *repo, const git_oid *oid, const char *path)
{
int retcode = GIT_ERROR;
git_buf unfiltered = GIT_BUF_INIT;
if (!unfiltered_blob_contents(&unfiltered, repo, oid)) {
git_vector filters = GIT_VECTOR_INIT;
int filter_count = git_filters_load(&filters, repo,
path, GIT_FILTER_TO_WORKTREE);
if (filter_count >= 0) {
git_buf_clear(out);
if (!filter_count) {
git_buf_put(out, git_buf_cstr(&unfiltered), git_buf_len(&unfiltered));
retcode = 0;
} else {
retcode = git_filters_apply(out, &unfiltered, &filters);
}
}
git_filters_free(&filters);
}
git_buf_free(&unfiltered);
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_buf filteredcontents = GIT_BUF_INIT;
if (!filtered_blob_contents(&filteredcontents, repo, id, git_buf_cstr(fnbuf))) {
int fd = git_futils_creat_withpath(git_buf_cstr(fnbuf),
GIT_DIR_MODE, mode);
if (fd >= 0) {
if (!p_write(fd, git_buf_cstr(&filteredcontents),
git_buf_len(&filteredcontents)))
retcode = 0;
else
retcode = GIT_ERROR;
p_close(fd);
}
}
git_buf_free(&filteredcontents);
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);
/* TODO: handle submodules */
if (S_ISLNK(attr)) {
printf("It's a link!\n'");
} else {
switch(git_tree_entry_type(entry)) {
case GIT_OBJ_TREE:
/* Nothing to do; the blob handling creates necessary directories. */
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;
}
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;
if (git_repository_is_bare(repo)) {
giterr_set(GITERR_INVALID, "Checkout is not allowed for bare repositories");
return GIT_ERROR;
}
stats->total = stats->processed = 0;
payload.stats = stats;
payload.repo = repo;
if (git_repository_odb(&payload.odb, repo) < 0) return GIT_ERROR;
/* TODO: stats->total is never calculated. */
if (!git_repository_head_tree(&tree, repo)) {
/* Checkout the files */
if (!git_tree_walk(tree, checkout_walker, GIT_TREEWALK_POST, &payload)) {
retcode = 0;
}
git_tree_free(tree);
}
git_odb_free(payload.odb);
return retcode;
}
GIT_END_DECL
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