HarmonyModulesHelpers.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
var HarmonyModulesHelpers = exports;
HarmonyModulesHelpers.getModuleVar = function(state, request) {
if(!state.harmonyModules) state.harmonyModules = [];
var idx = state.harmonyModules.indexOf(request);
if(idx < 0) {
idx = state.harmonyModules.length;
state.harmonyModules.push(request);
}
return "__WEBPACK_IMPORTED_MODULE_" + idx + "_" + request.replace(/[^A-Za-z0-9_]/g, "_").replace(/__+/g, "_") + "__";
};
HarmonyModulesHelpers.getNewModuleVar = function(state, request) {
if(state.harmonyModules && state.harmonyModules.indexOf(request) >= 0)
return null;
return HarmonyModulesHelpers.getModuleVar(state, request);
};
HarmonyModulesHelpers.checkModuleVar = function(state, request) {
if(!state.harmonyModules || state.harmonyModules.indexOf(request) < 0)
return null;
return HarmonyModulesHelpers.getModuleVar(state, request);
};
// checks if an harmony dependency is active in a module according to
// precedence rules.
HarmonyModulesHelpers.isActive = function(module, depInQuestion) {
var desc = depInQuestion.describeHarmonyExport();
if(!desc.exportedName) return true;
var before = true;
for(var i = 0; i < module.dependencies.length; i++) {
var dep = module.dependencies[i];
if(dep === depInQuestion) {
before = false;
continue;
}
if(!dep.describeHarmonyExport) continue;
var d = dep.describeHarmonyExport();
if(!d || !d.exportedName) continue;
if(d.exportedName === desc.exportedName) {
if(d.precedence < desc.precedence) {
return false;
}
if(d.precedence === desc.precedence && !before) {
return false;
}
}
}
return true;
};
// get a list of named exports defined in a module
// doesn't include * reexports.
HarmonyModulesHelpers.getActiveExports = function(module, currentDependency) {
var desc = currentDependency && currentDependency.describeHarmonyExport();
var currentIndex = currentDependency ? module.dependencies.indexOf(currentDependency) : -1;
return module.dependencies.map(function(dep, idx) {
return {
dep: dep,
idx: idx
};
}).reduce(function(arr, data) {
var dep = data.dep;
if(!dep.describeHarmonyExport) return arr;
var d = dep.describeHarmonyExport();
if(!d) return arr;
if(!desc || (d.precedence < desc.precedence) || (d.precedence === desc.precedence && data.idx < currentIndex)) {
var names = [].concat(d.exportedName);
names.forEach(function(name) {
if(name && arr.indexOf(name) < 0)
arr.push(name);
});
}
return arr;
}, []);
};