130 lines
3.4 KiB
JavaScript
130 lines
3.4 KiB
JavaScript
module.exports = function (glob, opts) {
|
|
if (typeof glob !== 'string') {
|
|
throw new TypeError('Expected a string');
|
|
}
|
|
|
|
var str = String(glob);
|
|
|
|
// The regexp we are building, as a string.
|
|
var reStr = "";
|
|
|
|
// Whether we are matching so called "extended" globs (like bash) and should
|
|
// support single character matching, matching ranges of characters, group
|
|
// matching, etc.
|
|
var extended = opts ? !!opts.extended : false;
|
|
|
|
// When globstar is _false_ (default), '/foo/*' is translated a regexp like
|
|
// '^\/foo\/.*$' which will match any string beginning with '/foo/'
|
|
// When globstar is _true_, '/foo/*' is translated to regexp like
|
|
// '^\/foo\/[^/]*$' which will match any string beginning with '/foo/' BUT
|
|
// which does not have a '/' to the right of it.
|
|
// E.g. with '/foo/*' these will match: '/foo/bar', '/foo/bar.txt' but
|
|
// these will not '/foo/bar/baz', '/foo/bar/baz.txt'
|
|
// Lastely, when globstar is _true_, '/foo/**' is equivelant to '/foo/*' when
|
|
// globstar is _false_
|
|
var globstar = opts ? !!opts.globstar : false;
|
|
|
|
// If we are doing extended matching, this boolean is true when we are inside
|
|
// a group (eg {*.html,*.js}), and false otherwise.
|
|
var inGroup = false;
|
|
|
|
// RegExp flags (eg "i" ) to pass in to RegExp constructor.
|
|
var flags = opts && typeof( opts.flags ) === "string" ? opts.flags : "";
|
|
|
|
var c;
|
|
for (var i = 0, len = str.length; i < len; i++) {
|
|
c = str[i];
|
|
|
|
switch (c) {
|
|
case "/":
|
|
case "$":
|
|
case "^":
|
|
case "+":
|
|
case ".":
|
|
case "(":
|
|
case ")":
|
|
case "=":
|
|
case "!":
|
|
case "|":
|
|
reStr += "\\" + c;
|
|
break;
|
|
|
|
case "?":
|
|
if (extended) {
|
|
reStr += ".";
|
|
break;
|
|
}
|
|
|
|
case "[":
|
|
case "]":
|
|
if (extended) {
|
|
reStr += c;
|
|
break;
|
|
}
|
|
|
|
case "{":
|
|
if (extended) {
|
|
inGroup = true;
|
|
reStr += "(";
|
|
break;
|
|
}
|
|
|
|
case "}":
|
|
if (extended) {
|
|
inGroup = false;
|
|
reStr += ")";
|
|
break;
|
|
}
|
|
|
|
case ",":
|
|
if (inGroup) {
|
|
reStr += "|";
|
|
break;
|
|
}
|
|
reStr += "\\" + c;
|
|
break;
|
|
|
|
case "*":
|
|
// Move over all consecutive "*"'s.
|
|
// Also store the previous and next characters
|
|
var prevChar = str[i - 1];
|
|
var starCount = 1;
|
|
while(str[i + 1] === "*") {
|
|
starCount++;
|
|
i++;
|
|
}
|
|
var nextChar = str[i + 1];
|
|
|
|
if (!globstar) {
|
|
// globstar is disabled, so treat any number of "*" as one
|
|
reStr += ".*";
|
|
} else {
|
|
// globstar is enabled, so determine if this is a globstar segment
|
|
var isGlobstar = starCount > 1 // multiple "*"'s
|
|
&& (prevChar === "/" || prevChar === undefined) // from the start of the segment
|
|
&& (nextChar === "/" || nextChar === undefined) // to the end of the segment
|
|
|
|
if (isGlobstar) {
|
|
// it's a globstar, so match zero or more path segments
|
|
reStr += "((?:[^/]*(?:\/|$))*)";
|
|
i++; // move over the "/"
|
|
} else {
|
|
// it's not a globstar, so only match one path segment
|
|
reStr += "([^/]*)";
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
reStr += c;
|
|
}
|
|
}
|
|
|
|
// When regexp 'g' flag is specified don't
|
|
// constrain the regular expression with ^ & $
|
|
if (!flags || !~flags.indexOf('g')) {
|
|
reStr = "^" + reStr + "$";
|
|
}
|
|
|
|
return new RegExp(reStr, flags);
|
|
};
|