60 lines
1.3 KiB
JavaScript
60 lines
1.3 KiB
JavaScript
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'use strict';
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const fileType = require('file-type');
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const isStream = require('is-stream');
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const tarStream = require('tar-stream');
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module.exports = () => input => {
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if (!Buffer.isBuffer(input) && !isStream(input)) {
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return Promise.reject(new TypeError(`Expected a Buffer or Stream, got ${typeof input}`));
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}
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if (Buffer.isBuffer(input) && (!fileType(input) || fileType(input).ext !== 'tar')) {
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return Promise.resolve([]);
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}
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const extract = tarStream.extract();
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const files = [];
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extract.on('entry', (header, stream, cb) => {
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const chunk = [];
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stream.on('data', data => chunk.push(data));
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stream.on('end', () => {
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const file = {
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data: Buffer.concat(chunk),
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mode: header.mode,
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mtime: header.mtime,
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path: header.name,
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type: header.type
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};
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if (header.type === 'symlink' || header.type === 'link') {
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file.linkname = header.linkname;
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}
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files.push(file);
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cb();
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});
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});
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const promise = new Promise((resolve, reject) => {
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if (!Buffer.isBuffer(input)) {
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input.on('error', reject);
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}
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extract.on('finish', () => resolve(files));
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extract.on('error', reject);
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});
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extract.then = promise.then.bind(promise);
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extract.catch = promise.catch.bind(promise);
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if (Buffer.isBuffer(input)) {
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extract.end(input);
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} else {
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input.pipe(extract);
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}
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return extract;
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};
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