81 lines
2.7 KiB
JavaScript
81 lines
2.7 KiB
JavaScript
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"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.readTarget = void 0;
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/*
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Copyright 2023 The Sigstore Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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const fs_1 = __importDefault(require("fs"));
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const error_1 = require("./error");
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// Downloads and returns the specified target from the provided TUF Updater.
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async function readTarget(tuf, targetPath) {
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const path = await getTargetPath(tuf, targetPath);
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return new Promise((resolve, reject) => {
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fs_1.default.readFile(path, 'utf-8', (err, data) => {
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if (err) {
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reject(new error_1.TUFError({
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code: 'TUF_READ_TARGET_ERROR',
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message: `error reading target ${path}`,
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cause: err,
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}));
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}
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else {
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resolve(data);
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}
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});
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});
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}
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exports.readTarget = readTarget;
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// Returns the local path to the specified target. If the target is not yet
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// cached locally, the provided TUF Updater will be used to download and
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// cache the target.
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async function getTargetPath(tuf, target) {
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let targetInfo;
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try {
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targetInfo = await tuf.getTargetInfo(target);
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}
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catch (err) {
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throw new error_1.TUFError({
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code: 'TUF_REFRESH_METADATA_ERROR',
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message: 'error refreshing TUF metadata',
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cause: err,
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});
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}
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if (!targetInfo) {
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throw new error_1.TUFError({
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code: 'TUF_FIND_TARGET_ERROR',
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message: `target ${target} not found`,
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});
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}
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let path = await tuf.findCachedTarget(targetInfo);
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// An empty path here means the target has not been cached locally, or is
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// out of date. In either case, we need to download it.
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if (!path) {
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try {
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path = await tuf.downloadTarget(targetInfo);
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}
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catch (err) {
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throw new error_1.TUFError({
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code: 'TUF_DOWNLOAD_TARGET_ERROR',
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message: `error downloading target ${path}`,
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cause: err,
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});
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}
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}
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return path;
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}
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