static int blob_create_internal(git_oid *oid, git_repository *repo, const char *content_path, const char *hint_path, bool try_load_filters)
{
int error;
struct stat st;
git_odb *odb = NULL;
git_off_t size;
assert(hint_path || !try_load_filters);
if ((error = git_path_lstat(content_path, &st)) < 0 || (error = git_repository_odb__weakptr(&odb, repo)) < 0)
return error;
size = st.st_size;
if (S_ISLNK(st.st_mode)) {
error = write_symlink(oid, odb, content_path, (size_t)size);
} else {
git_vector write_filters = GIT_VECTOR_INIT;
int filter_count = 0;
if (try_load_filters) {
/* Load the filters for writing this file to the ODB */
filter_count = git_filters_load(
&write_filters, repo, hint_path, GIT_FILTER_TO_ODB);
}
if (filter_count < 0) {
/* Negative value means there was a critical error */
error = filter_count;
} else if (filter_count == 0) {
/* No filters need to be applied to the document: we can stream
* directly from disk */
error = write_file_stream(oid, odb, content_path, size);
} else {
/* We need to apply one or more filters */
error = write_file_filtered(oid, odb, content_path, &write_filters);
}
git_filters_free(&write_filters);
/*
* TODO: eventually support streaming filtered files, for files
* which are bigger than a given threshold. This is not a priority
* because applying a filter in streaming mode changes the final
* size of the blob, and without knowing its final size, the blob
* cannot be written in stream mode to the ODB.
*
* The plan is to do streaming writes to a tempfile on disk and then
* opening streaming that file to the ODB, using
* `write_file_stream`.
*
* CAREFULLY DESIGNED APIS YO
*/
}
return error;
}
static int diff_file_content_load_workdir_file(
git_diff_file_content *fc, git_buf *path)
{
int error = 0;
git_vector filters = GIT_VECTOR_INIT;
git_buf raw = GIT_BUF_INIT, filtered = GIT_BUF_INIT;
git_file fd = git_futils_open_ro(git_buf_cstr(path));
if (fd < 0)
return fd;
if (!fc->file->size &&
!(fc->file->size = git_futils_filesize(fd)))
goto cleanup;
if (diff_file_content_binary_by_size(fc))
goto cleanup;
if ((error = git_filters_load(
&filters, fc->repo, fc->file->path, GIT_FILTER_TO_ODB)) < 0)
goto cleanup;
/* error >= is a filter count */
if (error == 0) {
if (!(error = git_futils_mmap_ro(
&fc->map, fd, 0, (size_t)fc->file->size)))
fc->flags |= GIT_DIFF_FLAG__UNMAP_DATA;
else /* fall through to try readbuffer below */
giterr_clear();
}
if (error != 0) {
error = git_futils_readbuffer_fd(&raw, fd, (size_t)fc->file->size);
if (error < 0)
goto cleanup;
if (!filters.length)
git_buf_swap(&filtered, &raw);
else
error = git_filters_apply(&filtered, &raw, &filters);
if (!error) {
fc->map.len = git_buf_len(&filtered);
fc->map.data = git_buf_detach(&filtered);
fc->flags |= GIT_DIFF_FLAG__FREE_DATA;
}
git_buf_free(&raw);
git_buf_free(&filtered);
}
cleanup:
git_filters_free(&filters);
p_close(fd);
return error;
}
static int blob_content_to_file(
git_blob *blob,
const char *path,
mode_t entry_filemode,
git_checkout_opts *opts)
{
int error = -1, nb_filters = 0;
mode_t file_mode = opts->file_mode;
bool dont_free_filtered = false;
git_buf unfiltered = GIT_BUF_INIT, filtered = GIT_BUF_INIT;
git_vector filters = GIT_VECTOR_INIT;
if (opts->disable_filters ||
(nb_filters = git_filters_load(
&filters,
git_object_owner((git_object *)blob),
path,
GIT_FILTER_TO_WORKTREE)) == 0) {
/* Create a fake git_buf from the blob raw data... */
filtered.ptr = blob->odb_object->raw.data;
filtered.size = blob->odb_object->raw.len;
/* ... and make sure it doesn't get unexpectedly freed */
dont_free_filtered = true;
}
if (nb_filters < 0)
return nb_filters;
if (nb_filters > 0) {
if ((error = git_blob__getbuf(&unfiltered, blob)) < 0)
goto cleanup;
if ((error = git_filters_apply(&filtered, &unfiltered, &filters)) < 0)
goto cleanup;
}
/* Allow overriding of file mode */
if (!file_mode)
file_mode = entry_filemode;
error = buffer_to_file(&filtered, path, opts->dir_mode, opts->file_open_flags, file_mode);
cleanup:
git_filters_free(&filters);
git_buf_free(&unfiltered);
if (!dont_free_filtered)
git_buf_free(&filtered);
return error;
}
