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File size: 2,931 Bytes
391a73c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | import { fileURLToPath } from 'url';
import type { NormalizedOutputOptions, RenderedChunk } from 'rollup';
import { hasOwnProperty, isObject, merge } from 'smob';
import type { Options } from './type';
import { WorkerPool } from './worker-pool';
export default function terser(input: Options = {}) {
const { maxWorkers, ...options } = input;
let workerPool: WorkerPool | null | undefined;
let numOfChunks = 0;
let numOfWorkersUsed = 0;
return {
name: 'terser',
async renderChunk(code: string, chunk: RenderedChunk, outputOptions: NormalizedOutputOptions) {
if (!workerPool) {
workerPool = new WorkerPool({
filePath: fileURLToPath(import.meta.url),
maxWorkers
});
}
numOfChunks += 1;
const defaultOptions: Options = {
sourceMap: outputOptions.sourcemap === true || typeof outputOptions.sourcemap === 'string'
};
if (outputOptions.format === 'es') {
defaultOptions.module = true;
}
if (outputOptions.format === 'cjs') {
defaultOptions.toplevel = true;
}
try {
const {
code: result,
nameCache,
sourceMap
} = await workerPool.addAsync({
code,
options: merge({}, options || {}, defaultOptions)
});
if (options.nameCache && nameCache) {
let vars: Record<string, any> = {
props: {}
};
if (hasOwnProperty(options.nameCache, 'vars') && isObject(options.nameCache.vars)) {
vars = merge({}, options.nameCache.vars || {}, vars);
}
if (hasOwnProperty(nameCache, 'vars') && isObject(nameCache.vars)) {
vars = merge({}, nameCache.vars, vars);
}
// eslint-disable-next-line no-param-reassign
options.nameCache.vars = vars;
let props: Record<string, any> = {};
if (hasOwnProperty(options.nameCache, 'props') && isObject(options.nameCache.props)) {
// eslint-disable-next-line prefer-destructuring
props = options.nameCache.props;
}
if (hasOwnProperty(nameCache, 'props') && isObject(nameCache.props)) {
props = merge({}, nameCache.props, props);
}
// eslint-disable-next-line no-param-reassign
options.nameCache.props = props;
}
if ((!!defaultOptions.sourceMap || !!options.sourceMap) && isObject(sourceMap)) {
return {
code: result,
map: sourceMap
};
}
return result;
} catch (e) {
return Promise.reject(e);
} finally {
numOfChunks -= 1;
if (numOfChunks === 0) {
numOfWorkersUsed = workerPool.numWorkers;
workerPool.close();
workerPool = null;
}
}
},
get numOfWorkersUsed() {
return numOfWorkersUsed;
}
};
}
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