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