44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
import { readFileSync } from "fs";
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import { runInNewContext } from "vm";
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import { deepFreeze } from "../shared/lib/deep-freeze";
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const sharedCache = new Map();
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export function loadManifest(path, shouldCache = true, cache = sharedCache) {
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const cached = shouldCache && cache.get(path);
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if (cached) {
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return cached;
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}
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let manifest = JSON.parse(readFileSync(path, "utf8"));
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// Freeze the manifest so it cannot be modified if we're caching it.
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if (shouldCache) {
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manifest = deepFreeze(manifest);
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}
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if (shouldCache) {
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cache.set(path, manifest);
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}
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return manifest;
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}
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export function evalManifest(path, shouldCache = true, cache = sharedCache) {
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const cached = shouldCache && cache.get(path);
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if (cached) {
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return cached;
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}
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const content = readFileSync(path, "utf8");
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if (content.length === 0) {
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throw new Error("Manifest file is empty");
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}
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let contextObject = {};
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runInNewContext(content, contextObject);
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// Freeze the context object so it cannot be modified if we're caching it.
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if (shouldCache) {
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contextObject = deepFreeze(contextObject);
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}
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if (shouldCache) {
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cache.set(path, contextObject);
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}
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return contextObject;
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}
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export function clearManifestCache(path, cache = sharedCache) {
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return cache.delete(path);
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}
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//# sourceMappingURL=load-manifest.js.map
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