wallet-core/node_modules/enhanced-resolve/lib/concord.js
2017-05-03 15:35:00 +02:00

190 lines
5.3 KiB
JavaScript

/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
var globToRegExp = require("./globToRegExp").globToRegExp;
function parseType(type) {
var items = type.split("+");
var t = items.shift();
return {
type: t === "*" ? null : t,
features: items
};
}
function isTypeMatched(baseType, testedType) {
if(typeof baseType === "string") baseType = parseType(baseType);
if(typeof testedType === "string") testedType = parseType(testedType);
if(testedType.type && testedType.type !== baseType.type) return false;
return testedType.features.every(function(requiredFeature) {
return baseType.features.indexOf(requiredFeature) >= 0;
});
}
function isResourceTypeMatched(baseType, testedType) {
baseType = baseType.split("/");
testedType = testedType.split("/");
if(baseType.length !== testedType.length) return false;
for(var i = 0; i < baseType.length; i++) {
if(!isTypeMatched(baseType[i], testedType[i]))
return false;
}
return true;
}
function isResourceTypeSupported(context, type) {
return context.supportedResourceTypes && context.supportedResourceTypes.some(function(supportedType) {
return isResourceTypeMatched(supportedType, type);
});
}
function isEnvironment(context, env) {
return context.environments && context.environments.every(function(environment) {
return isTypeMatched(environment, env);
});
}
var globCache = {};
function getGlobRegExp(glob) {
var regExp = globCache[glob] || (globCache[glob] = globToRegExp(glob));
return regExp;
}
function matchGlob(glob, relativePath) {
var regExp = getGlobRegExp(glob);
return regExp.exec(relativePath);
}
function isGlobMatched(glob, relativePath) {
return !!matchGlob(glob, relativePath);
}
function isConditionMatched(context, condition) {
var items = condition.split("|");
return items.some(function testFn(item) {
item = item.trim();
var inverted = /^!/.test(item);
if(inverted) return !testFn(item.substr(1));
if(/^[a-z]+:/.test(item)) {
// match named condition
var match = /^([a-z]+):\s*/.exec(item);
var value = item.substr(match[0].length);
var name = match[1];
switch(name) {
case "referrer":
return isGlobMatched(value, context.referrer);
default:
return false;
}
} else if(item.indexOf("/") >= 0) {
// match supported type
return isResourceTypeSupported(context, item);
} else {
// match environment
return isEnvironment(context, item);
}
});
}
function isKeyMatched(context, key) {
while(true) { //eslint-disable-line
var match = /^\[([^\]]+)\]\s*/.exec(key);
if(!match) return key;
key = key.substr(match[0].length);
var condition = match[1];
if(!isConditionMatched(context, condition)) {
return false;
}
}
}
function getField(context, configuration, field) {
var value;
Object.keys(configuration).forEach(function(key) {
var pureKey = isKeyMatched(context, key);
if(pureKey === field) {
value = configuration[key];
}
});
return value;
}
function getMain(context, configuration) {
return getField(context, configuration, "main");
}
function getExtensions(context, configuration) {
return getField(context, configuration, "extensions");
}
function matchModule(context, configuration, request) {
var modulesField = getField(context, configuration, "modules");
if(!modulesField) return request;
var newRequest = request;
var keys = Object.keys(modulesField);
var iteration = 0;
for(var i = 0; i < keys.length; i++) {
var key = keys[i];
var pureKey = isKeyMatched(context, key);
var match = matchGlob(pureKey, newRequest);
if(match) {
var value = modulesField[key];
if(typeof value !== "string") {
return value;
} else if(/^\(.+\)$/.test(pureKey)) {
newRequest = newRequest.replace(getGlobRegExp(pureKey), value);
} else {
var index = 1;
newRequest = value.replace(/(\/?\*)?\*/g, replaceMatcher);
}
i = -1;
if(iteration++ > keys.length) {
throw new Error("Request '" + request + "' matches recursively");
}
}
}
return newRequest;
function replaceMatcher(find) {
switch(find) {
case "/**":
var m = match[index++];
return m ? "/" + m : "";
case "**":
case "*":
return match[index++];
}
}
}
function matchType(context, configuration, relativePath) {
var typesField = getField(context, configuration, "types");
if(!typesField) return undefined;
var type;
Object.keys(typesField).forEach(function(key) {
var pureKey = isKeyMatched(context, key);
if(isGlobMatched(pureKey, relativePath)) {
var value = typesField[key];
if(!type && /\/\*$/.test(value))
throw new Error("value ('" + value + "') of key '" + key + "' contains '*', but there is no previous value defined");
type = value.replace(/\/\*$/, "/" + type);
}
});
return type;
}
exports.parseType = parseType;
exports.isTypeMatched = isTypeMatched;
exports.isResourceTypeSupported = isResourceTypeSupported;
exports.isEnvironment = isEnvironment;
exports.isGlobMatched = isGlobMatched;
exports.isConditionMatched = isConditionMatched;
exports.isKeyMatched = isKeyMatched;
exports.getField = getField;
exports.getMain = getMain;
exports.getExtensions = getExtensions;
exports.matchModule = matchModule;
exports.matchType = matchType;