31 lines
724 B
JavaScript
31 lines
724 B
JavaScript
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'use strict';
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const fs = require('fs');
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module.exports = (path, usrOpts) => {
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const opts = {
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encoding: 'utf8',
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lineEnding: '\n'
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};
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Object.assign(opts, usrOpts);
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return new Promise((resolve, reject) => {
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const rs = fs.createReadStream(path, {encoding: opts.encoding});
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let acc = '';
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let pos = 0;
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let index;
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rs
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.on('data', chunk => {
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index = chunk.indexOf(opts.lineEnding);
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acc += chunk;
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if (index === -1) {
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pos += chunk.length;
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} else {
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pos += index;
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rs.close();
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}
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})
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.on('close', () => resolve(acc.slice(acc.charCodeAt(0) === 0xFEFF ? 1 : 0, pos)))
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.on('error', err => reject(err));
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});
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};
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