41 lines
1.1 KiB
TypeScript
41 lines
1.1 KiB
TypeScript
/**
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* Writes the date of the build into the card.
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*/
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import type { Plugin } from 'vite';
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// Strict length requirement: See below.
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export const BUILD_DATE_PLACEHOLDER = '__BUILD_DATE_SENTINEL___';
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/**
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* The date cannot be handed to the bundler as a substituted name, because the
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* build configuration is evaluated once and `vite build --watch` reuses it.
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* As such, every rebuild would report the time the watcher started rather than
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* the actual build time. Output is generated afresh for each build, so the date
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* is written here instead.
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*/
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export const buildDate = (): Plugin => ({
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name: 'build-date',
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renderChunk(code) {
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if (!code.includes(BUILD_DATE_PLACEHOLDER)) {
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return null;
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}
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const date = new Date().toISOString();
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if (date.length !== BUILD_DATE_PLACEHOLDER.length) {
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this.error(
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'The build date must be exactly as long as the placeholder it replaces.',
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);
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}
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return {
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code: code.replaceAll(BUILD_DATE_PLACEHOLDER, date),
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// The replacement is exactly as long as what it replaces, so the existing
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// sourcemap still describes the code.
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map: null,
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};
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},
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});
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