4 files changed, 123 insertions, 0 deletions
diff --git a/web-gen/build.gradle b/web-gen/build.gradle
new file mode 100644
index 00000000..3f23b8b9
--- /dev/null
+++ b/web-gen/build.gradle
@@ -0,0 +1,16 @@
+apply plugin: 'groovy'
+apply plugin: 'idea'
+apply plugin: 'java-gradle-plugin'
+
+sourceSets.main.java.srcDirs = []
+sourceSets.main.groovy.srcDirs = ["src/main/java", "src/main/groovy"]
+
+repositories {
+    jcenter()
+}
+
+dependencies {
+    compileOnly gradleApi()
+    implementation localGroovy()
+    implementation "com.moowork.gradle:gradle-node-plugin:${Versions.nodeGradle}"
+}
diff --git a/web-gen/src/main/groovy/com/pitchedapps/frost/gradle/WebGenInstallTask.groovy b/web-gen/src/main/groovy/com/pitchedapps/frost/gradle/WebGenInstallTask.groovy
new file mode 100644
index 00000000..55b8aab8
--- /dev/null
+++ b/web-gen/src/main/groovy/com/pitchedapps/frost/gradle/WebGenInstallTask.groovy
@@ -0,0 +1,57 @@
+package com.pitchedapps.frost.gradle
+
+import com.moowork.gradle.node.npm.NpmTask
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.model.ObjectFactory
+import org.gradle.api.tasks.OutputDirectory
+import org.gradle.api.tasks.OutputFile
+
+/**
+ * Based on https://github.com/apollographql/apollo-android/blob/master/apollo-gradle-plugin/src/main/groovy/com/apollographql/apollo/gradle/ApolloCodegenInstallTask.groovy
+ */
+class WebGenInstallTask extends NpmTask {
+
+    static final String TAG = "frost-web-gen"
+    static final String NAME = "installWebGen"
+    static final String INSTALLATION_PATH = TAG + File.separator + "node_modules"
+    static final String PACKAGE_FILE_PATH = TAG + File.separator + "package.json"
+
+    static final String TYPESCRIPT_VERSION = "3.3.1"
+    static final String SASS_VERSION = "1.19.0"
+
+    @OutputDirectory
+    final DirectoryProperty installDir = ObjectFactory.directoryProperty()
+    @OutputFile
+    final RegularFileProperty packageFile = ObjectFactory.fileProperty()
+
+    WebGenInstallTask() {
+        setGroup("frost")
+        setDescription("Runs npm install for $TAG")
+        installDir.set(project.file(new File(project.buildDir, INSTALLATION_PATH)))
+        packageFile.set(project.file(new File(project.buildDir, PACKAGE_FILE_PATH)))
+    }
+
+    @Override
+    void exec() {
+        installDir.get().getAsFile().deleteDir()
+        writePackageFile(packageFile.get().getAsFile())
+
+        setArgs(Lists.newArrayList("install", "typescript@" + TYPESCRIPT_VERSION, "sass@" + SASS_VERSION, "--save", "--save-exact"))
+        getLogging().captureStandardOutput(LogLevel.INFO)
+
+        super.exec()
+    }
+
+    /**
+     * Generates a dummy package.json file to silence npm warnings
+     */
+    private static void writePackageFile(File apolloPackageFile) {
+        apolloPackageFile.write(
+                '''{
+  "name": "frost-web-gen"
+}
+'''
+        )
+    }
+}
+\ No newline at end of file
diff --git a/web-gen/src/main/groovy/com/pitchedapps/frost/gradle/WebGenPlugin.groovy b/web-gen/src/main/groovy/com/pitchedapps/frost/gradle/WebGenPlugin.groovy
new file mode 100644
index 00000000..90609607
--- /dev/null
+++ b/web-gen/src/main/groovy/com/pitchedapps/frost/gradle/WebGenPlugin.groovy
@@ -0,0 +1,49 @@
+import com.moowork.gradle.node.NodeExtension
+import com.pitchedapps.frost.gradle.WebGenInstallTask
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.internal.file.FileResolver
+
+import javax.inject.Inject
+
+class WebGenPlugin implements Plugin<Project> {
+
+    private static final String NODE_VERSION = "12.4.0"
+    private Project project
+    private final FileResolver fileResolver
+
+    @Inject
+    WebGenPlugin(FileResolver fileResolver) {
+        this.fileResolver = fileResolver
+    }
+
+    /**
+     * Based on https://github.com/apollographql/apollo-android/blob/master/apollo-gradle-plugin/src/main/groovy/com/apollographql/apollo/gradle/ApolloPlugin.groovy
+     * @param target
+     */
+    @Override
+    void apply(Project target) {
+        this.project = project
+        project.plugins.withId("java-base") {
+            applyWebGenPlugin()
+        }
+        project.gradle.getTaskGraph().whenReady {
+            if (!project.plugins.hasPlugin("java-base")) {
+                throw new IllegalArgumentException(
+                        "Frost Web Gen plugin can't be applied without Android or Java or Kotlin plugin.")
+            }
+        }
+    }
+
+    private void applyWebGenPlugin() {
+        setupNode()
+        project.tasks.create(WebGenInstallTask.NAME, WebGenInstallTask.class)
+    }
+
+    private void setupNode() {
+        project.plugins.apply NodePlugin
+        NodeExtension nodeConfig = project.extensions.findByName("node") as NodeExtension
+        nodeConfig.download = true
+        nodeConfig.version = NODE_VERSION
+    }
+}
+\ No newline at end of file
diff --git a/web-gen/src/main/resources/META-INF/gradle-plugins/com.pitchedapps.frost.gradle.properties b/web-gen/src/main/resources/META-INF/gradle-plugins/com.pitchedapps.frost.gradle.properties
new file mode 100644
index 00000000..b6435604
--- /dev/null
+++ b/web-gen/src/main/resources/META-INF/gradle-plugins/com.pitchedapps.frost.gradle.properties
@@ -0,0 +1 @@
+implementation-class=com.pitchedapps.frost.gradle.WebGenPlugin