42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
import crypto from 'node:crypto';
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import fs from 'node:fs';
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import JSON5 from 'json5';
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const packageJSON = JSON.parse(fs.readFileSync('./package.json', 'utf8'));
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const URLRoot = 'https://raw.githubusercontent.com/osmlab/name-suggestion-index/main';
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//
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// This function is used to write files (probably to `/dist`)
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// but with a block of metadata prepended to the beginning of the file.
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//
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// Accepts the same arguments that you'd pass to `fs.writeFileSync`
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// `file` = the path to the file
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// `contents` = should be stringified json containing an object {}
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//
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export function writeFileWithMeta(file, contents) {
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// Load the previous file
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let previous = { _meta: { } };
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try {
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const contents = fs.readFileSync(file, 'utf8');
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previous = JSON5.parse(contents);
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} catch (err) { /* ignore */ }
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// Calculate md5 of new contents
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const message = packageJSON.version + contents;
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const hash = crypto.createHash('md5').update(message).digest('hex');
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const now = new Date();
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// If file has changed (or never existed), write a new one with metadata
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if (previous._meta.hash !== hash) {
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const meta = `
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"_meta": {
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"version": "${packageJSON.version}",
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"generated": ${JSON.stringify(now)},
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"url": "${URLRoot}/${file}",
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"hash": "${hash}"
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},`;
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// Stick metadata at the beginning of the file in the most hacky way possible
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fs.writeFileSync(file, contents.replace(/^\{/, '{' + meta));
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}
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}
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