143 lines
2.8 KiB
JavaScript
Executable file
143 lines
2.8 KiB
JavaScript
Executable file
#!/usr/bin/env node
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'use strict';
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/*eslint-disable no-console*/
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// stdlib
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var fs = require('fs');
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// 3rd-party
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var argparse = require('argparse');
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// internal
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var yaml = require('..');
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////////////////////////////////////////////////////////////////////////////////
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var cli = new argparse.ArgumentParser({
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prog: 'js-yaml',
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version: require('../package.json').version,
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addHelp: true
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});
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cli.addArgument([ '-c', '--compact' ], {
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help: 'Display errors in compact mode',
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action: 'storeTrue'
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});
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// deprecated (not needed after we removed output colors)
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// option suppressed, but not completely removed for compatibility
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cli.addArgument([ '-j', '--to-json' ], {
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help: argparse.Const.SUPPRESS,
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dest: 'json',
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action: 'storeTrue'
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});
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cli.addArgument([ '-t', '--trace' ], {
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help: 'Show stack trace on error',
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action: 'storeTrue'
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});
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cli.addArgument([ 'file' ], {
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help: 'File to read, utf-8 encoded without BOM',
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nargs: '?',
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defaultValue: '-'
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});
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////////////////////////////////////////////////////////////////////////////////
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var options = cli.parseArgs();
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////////////////////////////////////////////////////////////////////////////////
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function readFile(filename, encoding, callback) {
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if (options.file === '-') {
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// read from stdin
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var chunks = [];
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process.stdin.on('data', function (chunk) {
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chunks.push(chunk);
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});
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process.stdin.on('end', function () {
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return callback(null, Buffer.concat(chunks).toString(encoding));
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});
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} else {
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fs.readFile(filename, encoding, callback);
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}
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}
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readFile(options.file, 'utf8', function (error, input) {
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var output, isYaml;
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if (error) {
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if (error.code === 'ENOENT') {
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console.error('File not found: ' + options.file);
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process.exit(2);
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}
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console.error(
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options.trace && error.stack ||
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error.message ||
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String(error));
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process.exit(1);
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}
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try {
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output = JSON.parse(input);
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isYaml = false;
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} catch (error) {
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if (error instanceof SyntaxError) {
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try {
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output = [];
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yaml.loadAll(input, function (doc) { output.push(doc); }, {});
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isYaml = true;
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if (0 === output.length) {
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output = null;
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} else if (1 === output.length) {
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output = output[0];
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}
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} catch (error) {
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if (options.trace && error.stack) {
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console.error(error.stack);
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} else {
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console.error(error.toString(options.compact));
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}
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process.exit(1);
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}
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} else {
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console.error(
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options.trace && error.stack ||
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error.message ||
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String(error));
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process.exit(1);
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}
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}
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if (isYaml) {
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console.log(JSON.stringify(output, null, ' '));
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} else {
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console.log(yaml.dump(output));
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}
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process.exit(0);
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});
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