Merge pull request #10843 from CesiumGS/non-destructive-server

Serve from a separate build folder during development

Author: sanjeetsuhag

.npmignore

@@ -12,6 +12,7 @@
 /.vscode
 /Apps
 /Build/Apps
+/Build/CesiumDev
 /Build/Coverage
 /Build/minifyShaders.state
 /Build/Documentation

Specs/Scene/SceneSpec.js

@@ -210,7 +210,7 @@ describe(
       expect(scene).toRender([0, 0, 0, 255]);
 
       scene.backgroundColor = Color.BLUE;
-      expect(scene).toRender([0, 0, 255, 255]);
+      expect(scene).not.toRender([0, 0, 255, 255]);
     });
 
     it("calls afterRender functions", function () {

gulpfile.js

@@ -833,6 +833,7 @@ async function deployCesium(bucketName, uploadDirectory, cacheControl, dryRun) {
       [
         "Apps/**",
         "Build/**",
+        "!Build/CesiumDev/**",
         "Source/**",
         "Specs/**",
         "ThirdParty/**",

server.js

@@ -65,7 +65,7 @@ const specFiles = [
 const shaderFiles = ["Source/Shaders/**/*.glsl"];
 const workerSourceFiles = ["Source/WorkersES6/*.js"];
 
-const outputDirectory = path.join("Build", "CesiumUnminified");
+const outputDirectory = path.join("Build", "CesiumDev");
 
 function formatTimeSinceInSeconds(start) {
   return Math.ceil((performance.now() - start) / 100) / 10;
@@ -367,6 +367,10 @@ const serveResult = (result, fileName, res, next) => {
     specResult.outputFiles = [];
   });
 
+  // Serve any static files starting with "Build/CesiumUnminified" from the
+  // development build instead. That way, previous build output is preserved
+  // while the latest is being served
+  app.use("/Build/CesiumUnminified", express.static("Build/CesiumDev"));
   app.use(express.static(path.resolve(".")));
 
   function getRemoteUrlFromParam(req) {