source: trip-planner-front/node_modules/glob-to-regexp/index.js@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 3.4 KB
Line 
1module.exports = function (glob, opts) {
2 if (typeof glob !== 'string') {
3 throw new TypeError('Expected a string');
4 }
5
6 var str = String(glob);
7
8 // The regexp we are building, as a string.
9 var reStr = "";
10
11 // Whether we are matching so called "extended" globs (like bash) and should
12 // support single character matching, matching ranges of characters, group
13 // matching, etc.
14 var extended = opts ? !!opts.extended : false;
15
16 // When globstar is _false_ (default), '/foo/*' is translated a regexp like
17 // '^\/foo\/.*$' which will match any string beginning with '/foo/'
18 // When globstar is _true_, '/foo/*' is translated to regexp like
19 // '^\/foo\/[^/]*$' which will match any string beginning with '/foo/' BUT
20 // which does not have a '/' to the right of it.
21 // E.g. with '/foo/*' these will match: '/foo/bar', '/foo/bar.txt' but
22 // these will not '/foo/bar/baz', '/foo/bar/baz.txt'
23 // Lastely, when globstar is _true_, '/foo/**' is equivelant to '/foo/*' when
24 // globstar is _false_
25 var globstar = opts ? !!opts.globstar : false;
26
27 // If we are doing extended matching, this boolean is true when we are inside
28 // a group (eg {*.html,*.js}), and false otherwise.
29 var inGroup = false;
30
31 // RegExp flags (eg "i" ) to pass in to RegExp constructor.
32 var flags = opts && typeof( opts.flags ) === "string" ? opts.flags : "";
33
34 var c;
35 for (var i = 0, len = str.length; i < len; i++) {
36 c = str[i];
37
38 switch (c) {
39 case "/":
40 case "$":
41 case "^":
42 case "+":
43 case ".":
44 case "(":
45 case ")":
46 case "=":
47 case "!":
48 case "|":
49 reStr += "\\" + c;
50 break;
51
52 case "?":
53 if (extended) {
54 reStr += ".";
55 break;
56 }
57
58 case "[":
59 case "]":
60 if (extended) {
61 reStr += c;
62 break;
63 }
64
65 case "{":
66 if (extended) {
67 inGroup = true;
68 reStr += "(";
69 break;
70 }
71
72 case "}":
73 if (extended) {
74 inGroup = false;
75 reStr += ")";
76 break;
77 }
78
79 case ",":
80 if (inGroup) {
81 reStr += "|";
82 break;
83 }
84 reStr += "\\" + c;
85 break;
86
87 case "*":
88 // Move over all consecutive "*"'s.
89 // Also store the previous and next characters
90 var prevChar = str[i - 1];
91 var starCount = 1;
92 while(str[i + 1] === "*") {
93 starCount++;
94 i++;
95 }
96 var nextChar = str[i + 1];
97
98 if (!globstar) {
99 // globstar is disabled, so treat any number of "*" as one
100 reStr += ".*";
101 } else {
102 // globstar is enabled, so determine if this is a globstar segment
103 var isGlobstar = starCount > 1 // multiple "*"'s
104 && (prevChar === "/" || prevChar === undefined) // from the start of the segment
105 && (nextChar === "/" || nextChar === undefined) // to the end of the segment
106
107 if (isGlobstar) {
108 // it's a globstar, so match zero or more path segments
109 reStr += "((?:[^/]*(?:\/|$))*)";
110 i++; // move over the "/"
111 } else {
112 // it's not a globstar, so only match one path segment
113 reStr += "([^/]*)";
114 }
115 }
116 break;
117
118 default:
119 reStr += c;
120 }
121 }
122
123 // When regexp 'g' flag is specified don't
124 // constrain the regular expression with ^ & $
125 if (!flags || !~flags.indexOf('g')) {
126 reStr = "^" + reStr + "$";
127 }
128
129 return new RegExp(reStr, flags);
130};
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