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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
function globToRegExp(glob) {
// * [^\\\/]*
// /**/ /.+/
// ^* \./.+ (concord special)
// ? [^\\\/]
// [!...] [^...]
// [^...] [^...]
// / [\\\/]
// {...,...} (...|...)
// ?(...|...) (...|...)?
// +(...|...) (...|...)+
// *(...|...) (...|...)*
// @(...|...) (...|...)
if(/^\(.+\)$/.test(glob)) {
// allow to pass an RegExp in brackets
return new RegExp(glob.substr(1, glob.length - 2));
}
const tokens = tokenize(glob);
const process = createRoot();
const regExpStr = tokens.map(process).join("");
return new RegExp("^" + regExpStr + "$");
}
const SIMPLE_TOKENS = {
"@(": "one",
"?(": "zero-one",
"+(": "one-many",
"*(": "zero-many",
"|": "segment-sep",
"/**/": "any-path-segments",
"**": "any-path",
"*": "any-path-segment",
"?": "any-char",
"{": "or",
"/": "path-sep",
",": "comma",
")": "closing-segment",
"}": "closing-or"
};
function tokenize(glob) {
return glob.split(/([@?+*]\(|\/\*\*\/|\*\*|[?*]|\[[\!\^]?(?:[^\]\\]|\\.)+\]|\{|,|\/|[|)}])/g).map(item => {
if(!item)
return null;
const t = SIMPLE_TOKENS[item];
if(t) {
return {
type: t
};
}
if(item[0] === "[") {
if(item[1] === "^" || item[1] === "!") {
return {
type: "inverted-char-set",
value: item.substr(2, item.length - 3)
};
} else {
return {
type: "char-set",
value: item.substr(1, item.length - 2)
};
}
}
return {
type: "string",
value: item
};
}).filter(Boolean).concat({
type: "end"
});
}
function createRoot() {
const inOr = [];
const process = createSeqment();
let initial = true;
return function(token) {
switch(token.type) {
case "or":
inOr.push(initial);
return "(";
case "comma":
if(inOr.length) {
initial = inOr[inOr.length - 1];
return "|";
} else {
return process({
type: "string",
value: ","
}, initial);
}
case "closing-or":
if(inOr.length === 0)
throw new Error("Unmatched '}'");
inOr.pop();
return ")";
case "end":
if(inOr.length)
throw new Error("Unmatched '{'");
return process(token, initial);
default:
{
const result = process(token, initial);
initial = false;
return result;
}
}
};
}
function createSeqment() {
const inSeqment = [];
const process = createSimple();
return function(token, initial) {
switch(token.type) {
case "one":
case "one-many":
case "zero-many":
case "zero-one":
inSeqment.push(token.type);
return "(";
case "segment-sep":
if(inSeqment.length) {
return "|";
} else {
return process({
type: "string",
value: "|"
}, initial);
}
case "closing-segment":
{
const segment = inSeqment.pop();
switch(segment) {
case "one":
return ")";
case "one-many":
return ")+";
case "zero-many":
return ")*";
case "zero-one":
return ")?";
}
throw new Error("Unexcepted segment " + segment);
}
case "end":
if(inSeqment.length > 0) {
throw new Error("Unmatched segment, missing ')'");
}
return process(token, initial);
default:
return process(token, initial);
}
};
}
function createSimple() {
return function(token, initial) {
switch(token.type) {
case "path-sep":
return "[\\\\/]+";
case "any-path-segments":
return "[\\\\/]+(?:(.+)[\\\\/]+)?";
case "any-path":
return "(.*)";
case "any-path-segment":
if(initial) {
return "\\.[\\\\/]+(?:.*[\\\\/]+)?([^\\\\/]+)";
} else {
return "([^\\\\/]*)";
}
case "any-char":
return "[^\\\\/]";
case "inverted-char-set":
return "[^" + token.value + "]";
case "char-set":
return "[" + token.value + "]";
case "string":
return token.value.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
case "end":
return "";
default:
throw new Error("Unsupported token '" + token.type + "'");
}
};
}
exports.globToRegExp = globToRegExp;