File: index.js

package info (click to toggle)
node-shell-quote 1.6.1+20160617-git72fb5a8ce29b-1
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 212 kB
  • ctags: 42
  • sloc: makefile: 21; sh: 13
file content (201 lines) | stat: -rw-r--r-- 6,641 bytes parent folder | download
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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
var json = typeof JSON !== undefined ? JSON : require('jsonify');
var map = function(a,f) { return a.map(f); };
var filter = function(a,f) { return a.filter(f) ; };
var reduce = function(xs,f,acc) {
    return arguments.length >= 3 ? xs.reduce(f,acc) : xs.reduce(f);
};

exports.quote = function (xs) {
    return map(xs, function (s) {
        if (s && typeof s === 'object') {
            return s.op.replace(/(.)/g, '\\$1');
        }
        else if (/["\s]/.test(s) && !/'/.test(s)) {
            return "'" + s.replace(/(['\\])/g, '\\$1') + "'";
        }
        else if (/["'\s]/.test(s)) {
            return '"' + s.replace(/(["\\$`!])/g, '\\$1') + '"';
        }
        else {
            return String(s).replace(/([#!"$&'()*,:;<=>?@\[\\\]^`{|}])/g, '\\$1'); 
        }
    }).join(' ');
};

var CONTROL = '(?:' + [
    '\\|\\|', '\\&\\&', ';;', '\\|\\&', '[&;()|<>]'
].join('|') + ')';
var META = '|&;()<> \\t';
var BAREWORD = '(\\\\[\'"' + META + ']|[^\\s\'"' + META + '])+';
var SINGLE_QUOTE = '"((\\\\"|[^"])*?)"';
var DOUBLE_QUOTE = '\'((\\\\\'|[^\'])*?)\'';

var TOKEN = '';
for (var i = 0; i < 4; i++) {
    TOKEN += (Math.pow(16,8)*Math.random()).toString(16);
}

exports.parse = function (s, env, opts) {
    var mapped = parse(s, env, opts);
    if (typeof env !== 'function') return mapped;
    return reduce(mapped, function (acc, s) {
        if (typeof s === 'object') return acc.concat(s);
        var xs = s.split(RegExp('(' + TOKEN + '.*?' + TOKEN + ')', 'g'));
        if (xs.length === 1) return acc.concat(xs[0]);
        return acc.concat(map(filter(xs, Boolean), function (x) {
            if (RegExp('^' + TOKEN).test(x)) {
                return json.parse(x.split(TOKEN)[1]);
            }
            else return x;
        }));
    }, []);
};

function parse (s, env, opts) {
    var chunker = new RegExp([
        '(' + CONTROL + ')', // control chars
        '(' + BAREWORD + '|' + SINGLE_QUOTE + '|' + DOUBLE_QUOTE + ')*'
    ].join('|'), 'g');
    var match = filter(s.match(chunker), Boolean);
    var commented = false;

    if (!match) return [];
    if (!env) env = {};
    if (!opts) opts = {};
    return map(match, function (s, j) {
        if (commented) {
            return;
        }
        if (RegExp('^' + CONTROL + '$').test(s)) {
            return { op: s };
        }

        // Hand-written scanner/parser for Bash quoting rules:
        //
        //  1. inside single quotes, all characters are printed literally.
        //  2. inside double quotes, all characters are printed literally
        //     except variables prefixed by '$' and backslashes followed by
        //     either a double quote or another backslash.
        //  3. outside of any quotes, backslashes are treated as escape
        //     characters and not printed (unless they are themselves escaped)
        //  4. quote context can switch mid-token if there is no whitespace
        //     between the two quote contexts (e.g. all'one'"token" parses as
        //     "allonetoken")
        var SQ = "'";
        var DQ = '"';
        var DS = '$';
        var BS = opts.escape || '\\';
        var quote = false;
        var esc = false;
        var out = '';
        var isGlob = false;

        for (var i = 0, len = s.length; i < len; i++) {
            var c = s.charAt(i);
            isGlob = isGlob || (!quote && (c === '*' || c === '?'));
            if (esc) {
                out += c;
                esc = false;
            }
            else if (quote) {
                if (c === quote) {
                    quote = false;
                }
                else if (quote == SQ) {
                    out += c;
                }
                else { // Double quote
                    if (c === BS) {
                        i += 1;
                        c = s.charAt(i);
                        if (c === DQ || c === BS || c === DS) {
                            out += c;
                        } else {
                            out += BS + c;
                        }
                    }
                    else if (c === DS) {
                        out += parseEnvVar();
                    }
                    else {
                        out += c;
                    }
                }
            }
            else if (c === DQ || c === SQ) {
                quote = c;
            }
            else if (RegExp('^' + CONTROL + '$').test(c)) {
                return { op: s };
            }
            else if (RegExp('^#$').test(c)) {
                commented = true;
                if (out.length){
                    return [out, { comment: s.slice(i+1) + match.slice(j+1).join(' ') }];
                }
                return [{ comment: s.slice(i+1) + match.slice(j+1).join(' ') }];
            }
            else if (c === BS) {
                esc = true;
            }
            else if (c === DS) {
                out += parseEnvVar();
            }
            else out += c;
        }

        if (isGlob) return {op: 'glob', pattern: out};

        return out;

        function parseEnvVar() {
            i += 1;
            var varend, varname;
            //debugger
            if (s.charAt(i) === '{') {
                i += 1;
                if (s.charAt(i) === '}') {
                    throw new Error("Bad substitution: " + s.substr(i - 2, 3));
                }
                varend = s.indexOf('}', i);
                if (varend < 0) {
                    throw new Error("Bad substitution: " + s.substr(i));
                }
                varname = s.substr(i, varend - i);
                i = varend;
            }
            else if (/[*@#?$!_\-]/.test(s.charAt(i))) {
                varname = s.charAt(i);
                i += 1;
            }
            else {
                varend = s.substr(i).match(/[^\w\d_]/);
                if (!varend) {
                    varname = s.substr(i);
                    i = s.length;
                } else {
                    varname = s.substr(i, varend.index);
                    i += varend.index - 1;
                }
            }
            return getVar(null, '', varname);
        }
    })
    // finalize parsed aruments
    .reduce(function(prev, arg){
        if (arg === undefined){
            return prev;
        }
        return prev.concat(arg);
    },[]);

    function getVar (_, pre, key) {
        var r = typeof env === 'function' ? env(key) : env[key];
        if (r === undefined) r = '';

        if (typeof r === 'object') {
            return pre + TOKEN + json.stringify(r) + TOKEN;
        }
        else return pre + r;
    }
}