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33 lines
670 B
33 lines
670 B
'use strict';
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const Transform = require('stream').Transform;
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class LastNewline extends Transform {
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constructor() {
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super();
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this.lastByte = false;
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}
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_transform(chunk, encoding, done) {
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if (chunk.length) {
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this.lastByte = chunk[chunk.length - 1];
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}
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this.push(chunk);
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done();
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}
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_flush(done) {
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if (this.lastByte === 0x0a) {
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return done();
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}
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if (this.lastByte === 0x0d) {
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this.push(Buffer.from('\n'));
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return done();
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}
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this.push(Buffer.from('\r\n'));
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return done();
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}
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}
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module.exports = LastNewline;
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