hackpro-sdk
Version:
64 lines • 2.92 kB
JavaScript
;
/*
* Copyright 2018 balena.io
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
const bluebird_1 = require("bluebird");
const lzma_native_1 = require("lzma-native");
const compressed_source_1 = require("./compressed-source");
const source_destination_1 = require("./source-destination");
const parseFileIndexAsync = bluebird_1.promisify(lzma_native_1.parseFileIndex);
class XzSource extends compressed_source_1.CompressedSource {
createTransform() {
return lzma_native_1.createDecompressor();
}
getSize() {
return __awaiter(this, void 0, void 0, function* () {
if (!(yield this.source.canRead())) {
return;
}
const { size } = yield this.source.getMetadata();
if (size === undefined) {
return;
}
const { uncompressedSize } = yield parseFileIndexAsync({
fileSize: size,
read: (count, offset, callback) => __awaiter(this, void 0, void 0, function* () {
try {
const readResult = yield this.source.read(Buffer.allocUnsafe(count), 0, count, offset);
callback(null, readResult.buffer);
}
catch (error) {
callback(error);
}
}),
});
return uncompressedSize;
});
}
}
exports.XzSource = XzSource;
XzSource.mimetype = 'application/x-xz';
source_destination_1.SourceDestination.register(XzSource);
//# sourceMappingURL=xz.js.map