mirror of
https://github.com/denoland/deno
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32 lines
713 B
TypeScript
32 lines
713 B
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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/** EndOfLine character enum */
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export enum EOL {
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LF = "\n",
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CRLF = "\r\n"
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}
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const regDetect = /(?:\r?\n)/g;
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/**
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* Detect the EOL character for string input.
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* returns null if no newline
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*/
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export function detect(content: string): EOL | null {
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const d = content.match(regDetect);
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if (!d || d.length === 0) {
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return null;
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}
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const crlf = d.filter((x: string): boolean => x === EOL.CRLF);
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if (crlf.length > 0) {
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return EOL.CRLF;
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} else {
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return EOL.LF;
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}
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}
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/** Format the file to the targeted EOL */
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export function format(content: string, eol: EOL): string {
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return content.replace(regDetect, eol);
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}
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