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46 lines
1.3 KiB
TypeScript
46 lines
1.3 KiB
TypeScript
import { promises as fs } from 'fs';
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import path from 'path';
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import { ResolvedOptions } from './options';
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// List of options that changes the prebundling result
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const PREBUNDLE_SENSITIVE_OPTIONS: (keyof ResolvedOptions)[] = [
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'compilerOptions',
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'configFile',
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'experimental',
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'extensions',
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'ignorePluginPreprocessors',
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'preprocess'
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];
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/**
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* @returns Whether the Svelte metadata has changed
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*/
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export async function saveSvelteMetadata(cacheDir: string, options: ResolvedOptions) {
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const svelteMetadata = generateSvelteMetadata(options);
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const svelteMetadataPath = path.resolve(cacheDir, '_svelte_metadata.json');
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const currentSvelteMetadata = JSON.stringify(svelteMetadata, (_, value) => {
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// Handle preprocessors
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return typeof value === 'function' ? value.toString() : value;
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});
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let existingSvelteMetadata: string | undefined;
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try {
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existingSvelteMetadata = await fs.readFile(svelteMetadataPath, 'utf8');
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} catch {
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// ignore
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}
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await fs.mkdir(cacheDir, { recursive: true });
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await fs.writeFile(svelteMetadataPath, currentSvelteMetadata);
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return currentSvelteMetadata !== existingSvelteMetadata;
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}
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function generateSvelteMetadata(options: ResolvedOptions) {
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const metadata: Record<string, any> = {};
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for (const key of PREBUNDLE_SENSITIVE_OPTIONS) {
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metadata[key] = options[key];
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}
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return metadata;
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}
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