feat(build): add support for windows filesystem

When building on the Windows filesystem back-slashes were being used for
file paths and module ids.  The back-slashes were being escaped but in
the case of modules that start with the letter 'u' ended up being
interpreted as starting a unicode character.  To fix this we are
replacing back-slashes with forward-slashes in module paths and module
ids.

This is believed to be a non-breaking change.

src/AureliaDependenciesPlugin.ts

@@ -48,7 +48,7 @@ class ParserPlugin {
     hooks.evaluateIdentifier.tap("imported var.moduleName", TAP_NAME, (expr: Webpack.MemberExpression) => {
       if (expr.property.name === "moduleName" &&
           expr.object.name === "PLATFORM" &&
-          expr.object.type === "Identifier") {
+          expr.object.type.toString() === "Identifier") {
         return new BasicEvaluatedExpression().setIdentifier("PLATFORM.moduleName").setRange(expr.range);
       }
       return undefined;
@@ -63,7 +63,7 @@ class ParserPlugin {
     hooks.evaluate.tap("MemberExpression", TAP_NAME, expr => {
       if (expr.property.name === "moduleName" &&
          (expr.object.type === "MemberExpression" && expr.object.property.name === "PLATFORM" ||
-          expr.object.type === "Identifier" && expr.object.name === "PLATFORM")) {
+          expr.object.type.toString() === "Identifier" && expr.object.name === "PLATFORM")) {
         return new BasicEvaluatedExpression().setIdentifier("PLATFORM.moduleName").setRange(expr.range);
       }
       return undefined;

src/PreserveModuleNamePlugin.ts

@@ -147,6 +147,7 @@ export class PreserveModuleNamePlugin {
           if (/^async[?!]/.test(realModule.rawRequest)) 
             id = "async!" + id;
 
+          id = id.replace(/\\/g, '/');
           if (module.buildMeta)  // meta can be null if the module contains errors
             module.buildMeta["aurelia-id"] = id;
           if (!this.isDll) {
@@ -198,11 +199,22 @@ function getNodeModuleData(module: Webpack.Module): NodeModule.Data | null {
     return null;
   }
 
+  function cleanWindowsPaths(paths: RegExpMatchArray | null) {
+    var out: string[] = [];
+    if (!paths) {
+      return out;
+    }
+    for (var i = 0; i < paths.length; i += 1) {
+      out[i] = paths[i].replace(':', '').split('\\').join('/');
+    }
+    return out;
+  }
+
   // Note that the negative lookahead (?!.*node_modules) ensures that we only match the last node_modules/ folder in the path,
   // in case the package was located in a sub-node_modules (which can occur in special circumstances).
   // We also need to take care of scoped modules. If the name starts with @ we must keep two parts,
   // so @corp/bar is the proper module name.
-  const modulePaths = module.resource.match(/(.*\bnode_modules[\\/](?!.*\bnode_modules\b)((?:@[^\\/]+[\\/])?[^\\/]+))(.*)/i);
+  const modulePaths = cleanWindowsPaths(module.resource.match(/(.*\bnode_modules[\\/](?!.*\bnode_modules\b)((?:@[^\\/]+[\\/])?[^\\/]+))(.*)/i));
   if (!modulePaths || modulePaths.length !== 4) {
     return null;
   }