js-yaml.js
2.66 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
#!/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));
});