[build] Add a task to re-generate math.js

build.gradle

@@ -301,9 +301,6 @@ targetList.each { target ->
 
     task("${target}PlatformLibs") {
         dependsOn ":platformLibs:${target}Install"
-        if (target == 'wasm32') {
-            dependsOn 'Interop:JsRuntime:installJsRuntime'
-        }
     }
 
     task("${target}CrossDist") {

runtime/build.gradle

@@ -51,3 +51,29 @@ task clean {
         delete buildDir
     }
 }
+
+task generateJsMath {
+    dependsOn ':dist'
+    doLast {
+        def jsinteropScript = isWindows() ? "jsinterop.bat" : "jsinterop"
+        def jsinterop = "$distDir/bin/$jsinteropScript"
+        def targetDir = "$buildDir/generated"
+        def firstLine = true
+        "$jsinterop -pkg kotlinx.interop.wasm.math -o $targetDir/math -target wasm32".execute().waitFor()
+        copy {
+            from("$targetDir/math-build/natives/js_stubs.js")
+            into('src/main/js')
+            rename { "math.js" }
+            filter { line ->
+                if (firstLine) {
+                    firstLine = false
+                    return "// NOTE: THIS FILE IS AUTO-GENERATED!\n" +
+                           "// Run ':runtime:generateJsMath' to re-generate it.\n\n" +
+                           "$line"
+                } else {
+                    return line
+                }
+            }
+        }
+    }
+}

runtime/src/main/js/math.js

@@ -1,18 +1,5 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// NOTE: THIS FILE IS AUTO-GENERATED!
+// Run ':runtime:generateJsMath' to re-generate it.
 
 konan.libraries.push ({