int git_indexer_new(
git_indexer **out,
const char *prefix,
unsigned int mode,
git_odb *odb,
git_transfer_progress_cb progress_cb,
void *progress_payload)
{
git_indexer *idx;
git_buf path = GIT_BUF_INIT, tmp_path = GIT_BUF_INIT;
static const char suff[] = "/pack";
int error, fd = -1;
idx = (git_indexer *) git__calloc(1, sizeof(git_indexer));
GITERR_CHECK_ALLOC(idx);
idx->odb = odb;
idx->progress_cb = progress_cb;
idx->progress_payload = progress_payload;
idx->mode = mode ? mode : GIT_PACK_FILE_MODE;
git_hash_ctx_init(&idx->hash_ctx);
git_hash_ctx_init(&idx->trailer);
error = git_buf_joinpath(&path, prefix, suff);
if (error < 0)
goto cleanup;
fd = git_futils_mktmp(&tmp_path, git_buf_cstr(&path), idx->mode);
git_buf_free(&path);
if (fd < 0)
goto cleanup;
error = git_packfile_alloc(&idx->pack, git_buf_cstr(&tmp_path));
git_buf_free(&tmp_path);
if (error < 0)
goto cleanup;
idx->pack->mwf.fd = fd;
if ((error = git_mwindow_file_register(&idx->pack->mwf)) < 0)
goto cleanup;
*out = idx;
return 0;
cleanup:
if (fd != -1)
p_close(fd);
git_buf_free(&path);
git_buf_free(&tmp_path);
git__free(idx);
return -1;
}
static bool are_symlinks_supported(const char *wd_path)
{
git_buf path = GIT_BUF_INIT;
int fd;
struct stat st;
int symlinks_supported = -1;
if ((fd = git_futils_mktmp(&path, wd_path, 0666)) < 0 ||
p_close(fd) < 0 ||
p_unlink(path.ptr) < 0 ||
p_symlink("testing", path.ptr) < 0 ||
p_lstat(path.ptr, &st) < 0)
symlinks_supported = false;
else
symlinks_supported = (S_ISLNK(st.st_mode) != 0);
(void)p_unlink(path.ptr);
git_buf_free(&path);
return symlinks_supported;
}
int git_filebuf_open(git_filebuf *file, const char *path, int flags)
{
int compression;
size_t path_len;
/* opening an already open buffer is a programming error;
* assert that this never happens instead of returning
* an error code */
assert(file && path && file->buffer == NULL);
memset(file, 0x0, sizeof(git_filebuf));
if (flags & GIT_FILEBUF_DO_NOT_BUFFER)
file->do_not_buffer = true;
file->buf_size = WRITE_BUFFER_SIZE;
file->buf_pos = 0;
file->fd = -1;
file->last_error = BUFERR_OK;
/* Allocate the main cache buffer */
if (!file->do_not_buffer) {
file->buffer = git__malloc(file->buf_size);
GITERR_CHECK_ALLOC(file->buffer);
}
/* If we are hashing on-write, allocate a new hash context */
if (flags & GIT_FILEBUF_HASH_CONTENTS) {
file->digest = git_hash_new_ctx();
GITERR_CHECK_ALLOC(file->digest);
}
compression = flags >> GIT_FILEBUF_DEFLATE_SHIFT;
/* If we are deflating on-write, */
if (compression != 0) {
/* Initialize the ZLib stream */
if (deflateInit(&file->zs, compression) != Z_OK) {
giterr_set(GITERR_ZLIB, "Failed to initialize zlib");
goto cleanup;
}
/* Allocate the Zlib cache buffer */
file->z_buf = git__malloc(file->buf_size);
GITERR_CHECK_ALLOC(file->z_buf);
/* Never flush */
file->flush_mode = Z_NO_FLUSH;
file->write = &write_deflate;
} else {
file->write = &write_normal;
}
/* If we are writing to a temp file */
if (flags & GIT_FILEBUF_TEMPORARY) {
git_buf tmp_path = GIT_BUF_INIT;
/* Open the file as temporary for locking */
file->fd = git_futils_mktmp(&tmp_path, path);
if (file->fd < 0) {
git_buf_free(&tmp_path);
goto cleanup;
}
file->fd_is_open = true;
/* No original path */
file->path_original = NULL;
file->path_lock = git_buf_detach(&tmp_path);
GITERR_CHECK_ALLOC(file->path_lock);
} else {
path_len = strlen(path);
/* Save the original path of the file */
file->path_original = git__strdup(path);
GITERR_CHECK_ALLOC(file->path_original);
/* create the locking path by appending ".lock" to the original */
file->path_lock = git__malloc(path_len + GIT_FILELOCK_EXTLENGTH);
GITERR_CHECK_ALLOC(file->path_lock);
memcpy(file->path_lock, file->path_original, path_len);
memcpy(file->path_lock + path_len, GIT_FILELOCK_EXTENSION, GIT_FILELOCK_EXTLENGTH);
/* open the file for locking */
if (lock_file(file, flags) < 0)
goto cleanup;
}
return 0;
cleanup:
git_filebuf_cleanup(file);
return -1;
}
