update

package/node_modules/@sigstore/tuf/dist/target.js

@@ -0,0 +1,80 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.readTarget = void 0;
+/*
+Copyright 2023 The Sigstore Authors.
+
+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.
+*/
+const fs_1 = __importDefault(require("fs"));
+const error_1 = require("./error");
+// Downloads and returns the specified target from the provided TUF Updater.
+async function readTarget(tuf, targetPath) {
+    const path = await getTargetPath(tuf, targetPath);
+    return new Promise((resolve, reject) => {
+        fs_1.default.readFile(path, 'utf-8', (err, data) => {
+            if (err) {
+                reject(new error_1.TUFError({
+                    code: 'TUF_READ_TARGET_ERROR',
+                    message: `error reading target ${path}`,
+                    cause: err,
+                }));
+            }
+            else {
+                resolve(data);
+            }
+        });
+    });
+}
+exports.readTarget = readTarget;
+// Returns the local path to the specified target. If the target is not yet
+// cached locally, the provided TUF Updater will be used to download and
+// cache the target.
+async function getTargetPath(tuf, target) {
+    let targetInfo;
+    try {
+        targetInfo = await tuf.getTargetInfo(target);
+    }
+    catch (err) {
+        throw new error_1.TUFError({
+            code: 'TUF_REFRESH_METADATA_ERROR',
+            message: 'error refreshing TUF metadata',
+            cause: err,
+        });
+    }
+    if (!targetInfo) {
+        throw new error_1.TUFError({
+            code: 'TUF_FIND_TARGET_ERROR',
+            message: `target ${target} not found`,
+        });
+    }
+    let path = await tuf.findCachedTarget(targetInfo);
+    // An empty path here means the target has not been cached locally, or is
+    // out of date. In either case, we need to download it.
+    if (!path) {
+        try {
+            path = await tuf.downloadTarget(targetInfo);
+        }
+        catch (err) {
+            throw new error_1.TUFError({
+                code: 'TUF_DOWNLOAD_TARGET_ERROR',
+                message: `error downloading target ${path}`,
+                cause: err,
+            });
+        }
+    }
+    return path;
+}