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
|
var common = require('./common');
var fs = require('fs');
common.register('sort', _sort, {
canReceivePipe: true,
cmdOptions: {
'r': 'reverse',
'n': 'numerical',
},
});
// parse out the number prefix of a line
function parseNumber(str) {
var match = str.match(/^\s*(\d*)\s*(.*)$/);
return { num: Number(match[1]), value: match[2] };
}
// compare two strings case-insensitively, but examine case for strings that are
// case-insensitive equivalent
function unixCmp(a, b) {
var aLower = a.toLowerCase();
var bLower = b.toLowerCase();
return (aLower === bLower ?
-1 * a.localeCompare(b) : // unix sort treats case opposite how javascript does
aLower.localeCompare(bLower));
}
// compare two strings in the fashion that unix sort's -n option works
function numericalCmp(a, b) {
var objA = parseNumber(a);
var objB = parseNumber(b);
if (objA.hasOwnProperty('num') && objB.hasOwnProperty('num')) {
return ((objA.num !== objB.num) ?
(objA.num - objB.num) :
unixCmp(objA.value, objB.value));
} else {
return unixCmp(objA.value, objB.value);
}
}
//@
//@ ### sort([options,] file [, file ...])
//@ ### sort([options,] file_array)
//@ Available options:
//@
//@ + `-r`: Reverse the result of comparisons
//@ + `-n`: Compare according to numerical value
//@
//@ Examples:
//@
//@ ```javascript
//@ sort('foo.txt', 'bar.txt');
//@ sort('-r', 'foo.txt');
//@ ```
//@
//@ Return the contents of the files, sorted line-by-line. Sorting multiple
//@ files mixes their content, just like unix sort does.
function _sort(options, files) {
// Check if this is coming from a pipe
var pipe = common.readFromPipe();
if (!files && !pipe) common.error('no files given');
files = [].slice.call(arguments, 1);
if (pipe) {
files.unshift('-');
}
var lines = [];
files.forEach(function (file) {
if (!fs.existsSync(file) && file !== '-') {
// exit upon any sort of error
common.error('no such file or directory: ' + file);
}
var contents = file === '-' ? pipe : fs.readFileSync(file, 'utf8');
lines = lines.concat(contents.trimRight().split(/\r*\n/));
});
var sorted;
sorted = lines.sort(options.numerical ? numericalCmp : unixCmp);
if (options.reverse) {
sorted = sorted.reverse();
}
return sorted.join('\n') + '\n';
}
module.exports = _sort;
|
