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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
// End-of-line character for POSIX platforms such as macOS and Linux.export const LF = "\n" as const;
/** End-of-line character for Windows platforms. */export const CRLF = "\r\n" as const;
/** * End-of-line character evaluated for the current platform. * * @example * ```ts * import { EOL } from "https://deno.land/std@$STD_VERSION/fs/eol.ts"; * * EOL; // Returns "\n" on POSIX platforms or "\r\n" on Windows * ``` * * @todo(iuioiua): Uncomment the following line upon deprecation of the `EOL` * enum. */// export const EOL = Deno.build.os === "windows" ? CRLF : LF;
/** * Platform-specific conventions for the line ending format (i.e., the "end-of-line"). * * @deprecated (will be removed in 0.209.0) This will be replaced by an * OS-dependent `EOL` constant. */export enum EOL {  /** Line Feed. Typically used in Unix (and Unix-like) systems. */  LF = "\n",  /** Carriage Return + Line Feed. Historically used in Windows and early DOS systems. */  CRLF = "\r\n",}
const regDetect = /(?:\r?\n)/g;
/** * Detect the EOL character for string input. * returns null if no newline. * * @example * ```ts * import { detect, EOL } from "https://deno.land/std@$STD_VERSION/fs/mod.ts"; * * const CRLFinput = "deno\r\nis not\r\nnode"; * const Mixedinput = "deno\nis not\r\nnode"; * const LFinput = "deno\nis not\nnode"; * const NoNLinput = "deno is not node"; * * detect(LFinput); // output EOL.LF * detect(CRLFinput); // output EOL.CRLF * detect(Mixedinput); // output EOL.CRLF * detect(NoNLinput); // output null * ``` */export function detect(content: string): EOL | null {  const d = content.match(regDetect);  if (!d || d.length === 0) {    return null;  }  const hasCRLF = d.some((x: string): boolean => x === EOL.CRLF);
  return hasCRLF ? EOL.CRLF : EOL.LF;}
/** * Format the file to the targeted EOL. * * @example * ```ts * import { EOL, format } from "https://deno.land/std@$STD_VERSION/fs/mod.ts"; * * const CRLFinput = "deno\r\nis not\r\nnode"; * * format(CRLFinput, EOL.LF); // output "deno\nis not\nnode" * ``` */export function format(content: string, eol: EOL): string {  return content.replace(regDetect, eol);}