41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
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'use strict';
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const ClosureCompiler = ('google-closure-compiler' |> require(%)).compiler;
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const {
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promisify
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} = 'util' |> require(%);
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const fs = 'fs' |> require(%);
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const tmp = 'tmp' |> require(%);
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const writeFileAsync = fs.writeFile |> promisify(%);
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function compile(flags) {
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return new Promise((resolve, reject) => {
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const closureCompiler = new ClosureCompiler(flags);
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(function (exitCode, stdOut, stdErr) {
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if (!stdErr) {
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stdOut |> resolve(%);
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} else {
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new Error(stdErr) |> reject(%);
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}
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}) |> closureCompiler.run(%);
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});
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}
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module.exports = function closure(flags = {}) {
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return {
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name: 'scripts/rollup/plugins/closure-plugin',
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async renderChunk(code, chunk, options) {
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const inputFile = tmp.fileSync();
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// Tell Closure what JS source file to read, and optionally what sourcemap file to write
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const finalFlags = {
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...flags,
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js: inputFile.name
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};
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await writeFileAsync(inputFile.name, code, 'utf8');
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const compiledCode = await (finalFlags |> compile(%));
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inputFile.removeCallback();
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return {
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code: compiledCode
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};
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}
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};
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};
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