export default function show(this:CmdLineConfig, envName) {
	envName = envName || getCurrentDefault();
	if (!envName) {
		throw new MyError('no default config. use "jenv --env" to set it. or specify a config name.');
	}
	const config = readEnvSync(envName);
	
	if (isatty(process.stdout.fd)) {
		console.log(require('util').inspect(config, {colors: true, depth: 999}));
	} else {
		console.log(JSON.stringify(config, null, 4));
	}
}

function main<T>(task: Promise<any>): void {
	let latestVersion: string = null;

	const token = new CancellationToken();

	if (isatty(1)) {
		getLatestVersion(pkg.name, token)
			.then(version => latestVersion = version)
			.catch(err => !isCancelledError(err) && console.error(err));
	}

	task
		.catch(fatal)
		.then(() => {
			if (latestVersion && semver.gt(latestVersion, pkg.version)) {
				console.log(`\nThe latest version of ${ pkg.name } is ${ latestVersion } and you have ${ pkg.version }.\nUpdate it now: npm install -g ${ pkg.name }`);
			} else {
				token.cancel();
			}
		});
}

////////////////////////////////////////////////////
/// TTY tests : http://nodejs.org/api/tty.html
////////////////////////////////////////////////////

namespace tty_tests {
    let rs: tty.ReadStream;
    let ws: tty.WriteStream;

    let rsIsRaw: boolean = rs.isRaw;
    rs.setRawMode(true);

    let wsColumns: number = ws.columns;
    let wsRows: number = ws.rows;

    let isTTY: boolean = tty.isatty(1);
}

////////////////////////////////////////////////////
/// Dgram tests : http://nodejs.org/api/dgram.html
////////////////////////////////////////////////////

namespace dgram_tests {
    var ds: dgram.Socket = dgram.createSocket("udp4", (msg: Buffer, rinfo: dgram.RemoteInfo): void => {
    });
    var ai: dgram.AddressInfo = ds.address();
    ds.send(new Buffer("hello"), 0, 5, 5000, "127.0.0.1", (error: Error, bytes: number): void => {
    });
}

////////////////////////////////////////////////////

import {isatty} from "tty";

export const prettyPrint: boolean = isatty(1) && isatty(2);

function cli() {
  var inputs: string[] = [];
  var outputJS: any = null;
  var outputCPP: any = null;
  var outputAsmJS: any = null;
  var moduleName: any = null;
  var helpFlag: boolean = false;
  var watchFlag: boolean = false;

  var fs: any = require('fs');
  var tty: any = require('tty');
  var path: any = require('path');
  var notifier: any = require('terminal-notifier');
  var useColors: boolean = tty.isatty(1) && tty.isatty(2);

  function time(): string {
    var now: Date = new Date();
    if (!watchFlag) return '';
    return ((now.getHours() % 12 + 11) % 12 + 1) + ':' +
      (100 + now.getMinutes()).toString().slice(1) +
      ['am', 'pm'][now.getHours() / 12 | 0] +
      ' - ';
  }

  function indent(text: string): string {
    return '  ' + text.replace(/\n/g, '\n  ');
  }

  function wrapColor(color: number): (text: string) => string {
    if (!useColors) return text => { return text; };
    return text => { return '\u001b[' + color + 'm' + text + '\u001b[0m'; };
  }

  var gray: (text: string) => string = wrapColor(90);
  var red: (text: string) => string = wrapColor(91);
  var green: (text: string) => string = wrapColor(92);

  function showNotification(diagnostic: Diagnostic) {
    if (!watchFlag) return;
    var options: any = {
      title: diagnostic.range !== null ? diagnostic.range.source.name + ' on line ' + diagnostic.range.start.line : 'Build error',
      group: 'bitscript'
    };
    if (diagnostic.range !== null && process.env.EDITOR) {
      options.execute = process.env.EDITOR + ' "' + path.resolve(diagnostic.range.source.name) + ':' + diagnostic.range.start.line + '"';
    }
    notifier(diagnostic.text, options);
  }

  function compile() {
    var compiler = new Compiler();
    inputs.forEach(input => compiler.addSource(input, fs.readFileSync(input, 'utf8')));
    compiler.compile();

    // Output code on success
    if (compiler.log.errorCount === 0) {
      if (outputJS !== null) {
        var root: string = path.relative(path.dirname(outputJS), '.');
        var codeAndMap: { code: string; map: string } = OutputJS.generateWithSourceMap(compiler.module, root);
        fs.writeFileSync(outputJS, codeAndMap.code + '\n/' + /* Break this up to make Chrome ignore it */ '/# sourceMappingURL=' + path.basename(outputJS) + '.map\n');
        fs.writeFileSync(outputJS + '.map', codeAndMap.map + '\n');
      }
      if (outputCPP !== null) fs.writeFileSync(outputCPP, OutputCPP.generate(compiler.module) + '\n');
      if (outputAsmJS !== null) fs.writeFileSync(outputAsmJS, OutputAsmJS.generate(compiler.module, moduleName) + '\n');
      console.log(gray(time() + 'build successful'));
      return true;
    }

    // Remove files on failure
    if (outputJS !== null && fs.existsSync(outputJS)) {
      fs.unlinkSync(outputJS);
      fs.unlinkSync(outputJS + '.map');
    }
    if (outputCPP !== null && fs.existsSync(outputCPP)) fs.unlinkSync(outputCPP);
    if (outputAsmJS !== null && fs.existsSync(outputAsmJS)) fs.unlinkSync(outputAsmJS);
    if (watchFlag) showNotification(compiler.log.diagnostics[0]);

    // Use fancy colored output for TTYs
    console.log(gray(time() + 'build failed\n\n') + indent(compiler.log.diagnostics.map(d => {
      var parts = d.range.sourceString().split('\n');
      return gray(d.type + ' on line ' + d.range.start.line + ' of ' + d.range.source.name + ': ') + red(d.text) + '\n\n' + parts[0] + '\n' + green(parts[1]) + '\n';
    }).join('\n')));
    return false;
  }

  // Return a unique string that will change when one of the files changes
  function stat(): string {
    return inputs.map(input => input + fs.statSync(input).mtime).join('\n');
  }

  function usage() {
    console.log([
      '',
      'usage: bitc in1.bit in2.bit ... [--js out.js] [--cpp out.cpp] [--asmjs out.js] [--name moduleName] [--watch]',
      '',
    ].join('\n'));
  }

  // Parse command-line flags
  var args = process.argv.slice(2);
//.........这里部分代码省略.........