30 lines
754 B
JavaScript
30 lines
754 B
JavaScript
import { readFile, writeFile } from "node:fs/promises";
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const isMissing = (cause) =>
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typeof cause === "object" &&
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cause !== null &&
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"code" in cause &&
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cause.code === "ENOENT";
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/** Compare or update one generated text artifact with actionable diagnostics. */
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export const ensureGeneratedFile = async ({
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path,
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source,
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check,
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generateCommand,
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}) => {
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let existing;
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try {
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existing = await readFile(path, "utf8");
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} catch (cause) {
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if (!isMissing(cause)) throw cause;
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}
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if (existing === source) return { changed: false };
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if (check)
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throw new Error(
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`${path} is missing or stale. Run \`${generateCommand}\` and commit the result.`,
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);
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await writeFile(path, source, "utf8");
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return { changed: true };
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};
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