50 lines
1.3 KiB
TypeScript
50 lines
1.3 KiB
TypeScript
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// Original: https://github.com/rollup/plugins/tree/8835dd2aed92f408d7dc72d7cc25a9728e16face/packages/json
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import JSON5 from "json5";
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import { Plugin } from "rollup";
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import { createFilter, dataToEsm } from "@rollup/pluginutils";
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import { RollupJsonOptions } from "@rollup/plugin-json";
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interface Json5SyntaxError extends SyntaxError {
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lineNumber: number;
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columnNumber: number;
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}
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export default function json5(options: RollupJsonOptions = {}): Plugin {
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const filter = createFilter(options.include, options.exclude);
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const indent = "indent" in options ? options.indent : "\t";
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return {
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name: "json5",
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transform(json, id) {
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if (id.slice(-6) !== ".json5" || !filter(id)) return null;
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try {
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const parsed = JSON5.parse(json);
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return {
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code: dataToEsm(parsed, {
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preferConst: options.preferConst,
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compact: options.compact,
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namedExports: options.namedExports,
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indent,
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}),
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map: { mappings: "" },
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};
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} catch (err) {
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if (!(err instanceof SyntaxError)) {
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throw err;
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}
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const message = "Could not parse JSON5 file";
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const { lineNumber, columnNumber } = err as Json5SyntaxError;
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this.warn({
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message,
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id,
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loc: { line: lineNumber, column: columnNumber },
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});
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return null;
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}
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},
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};
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}
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