[ide] Initialize a shared terminal on JetBrains IDEs when a workspace…

… starts

components/ide/jetbrains/backend-plugin/gradle.properties

@@ -16,7 +16,7 @@ platformVersion=221.4994-EAP-CANDIDATE-SNAPSHOT
 platformDownloadSources=true
 # Plugin Dependencies -> https://plugins.jetbrains.com/docs/intellij/plugin-dependencies.html
 # Example: platformPlugins = com.intellij.java, com.jetbrains.php:203.4449.22
-platformPlugins=Git4Idea
+platformPlugins=Git4Idea, org.jetbrains.plugins.terminal, com.jetbrains.codeWithMe
 # Opt-out flag for bundling Kotlin standard library.
 # See https://plugins.jetbrains.com/docs/intellij/kotlin.html#kotlin-standard-library for details.
 kotlin.stdlib.default.dependency=false

components/ide/jetbrains/backend-plugin/src/main/kotlin/io/gitpod/jetbrains/remote/GitpodTerminalService.kt

@@ -0,0 +1,95 @@
+// Copyright (c) 2022 Gitpod GmbH. All rights reserved.
+// Licensed under the GNU Affero General Public License (AGPL).
+// See License-AGPL.txt in the project root for license information.
+
+package io.gitpod.jetbrains.remote
+
+import com.intellij.openapi.Disposable
+import com.intellij.openapi.application.runInEdt
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.wm.ToolWindowManager
+import com.intellij.openapi.wm.ex.ToolWindowManagerListener
+import com.intellij.util.application
+import com.jetbrains.rd.util.lifetime.Lifetime
+import com.jetbrains.rdserver.terminal.BackendTerminalManager
+import com.jetbrains.rdserver.unattendedHost.UnattendedHostManager
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.future.await
+import kotlinx.coroutines.launch
+import org.jetbrains.plugins.terminal.ShellTerminalWidget
+import org.jetbrains.plugins.terminal.TerminalToolWindowFactory
+import org.jetbrains.plugins.terminal.TerminalView
+import java.util.concurrent.CompletableFuture
+
+@Suppress("UnstableApiUsage", "EXPERIMENTAL_IS_NOT_ENABLED", "OPT_IN_IS_NOT_ENABLED")
+@OptIn(DelicateCoroutinesApi::class)
+class GitpodTerminalService(private val project: Project) : Disposable {
+    private val lifetime = Lifetime.Eternal.createNested()
+    private val terminalView = TerminalView.getInstance(project)
+    private val backendTerminalManager = BackendTerminalManager.getInstance(project)
+
+    override fun dispose() {
+        lifetime.terminate()
+    }
+
+    init {
+        if (!application.isHeadlessEnvironment) {
+            launch()
+        }
+    }
+
+    private fun launch() = GlobalScope.launch {
+        getTerminalToolWindowRegisteredEvent().await()
+        delayUntilControllerClientConnects()
+        val widget = createNewSharedTerminal().await()
+        printWelcomeMessage(widget)
+    }
+
+    private fun printWelcomeMessage(widget: ShellTerminalWidget) {
+        widget.executeCommand(
+                "clear; echo '\uD83D\uDC4B Welcome to Gitpod!\n" +
+                        "\t\t - Start by typing `gp --help` to see what you can do with Gitpod CLI.\n" +
+                        "\t\t - Check also `gp tasks --help` to learn how to attach and watch running tasks defined on .gitpod.yml!\n'"
+        )
+    }
+
+    private fun getTerminalToolWindowRegisteredEvent(): CompletableFuture<Void> {
+        val completableFuture = CompletableFuture<Void>()
+
+        val messageBusConnection = project.messageBus.connect()
+
+        val toolWindowManagerListener = object : ToolWindowManagerListener {
+            override fun toolWindowsRegistered(ids: MutableList<String>, toolWindowManager: ToolWindowManager) {
+                if (ids.contains(TerminalToolWindowFactory.TOOL_WINDOW_ID)) {
+                    completableFuture.complete(null)
+                    messageBusConnection.disconnect()
+                }
+            }
+        }
+
+        messageBusConnection.subscribe(ToolWindowManagerListener.TOPIC, toolWindowManagerListener)
+
+        return completableFuture
+    }
+
+    private tailrec suspend fun delayUntilControllerClientConnects() {
+        if (UnattendedHostManager.getInstance().controllerClientId == null) {
+            delay(1000L)
+            return delayUntilControllerClientConnects()
+        }
+    }
+
+    private fun createNewSharedTerminal(): CompletableFuture<ShellTerminalWidget> {
+        val completableFuture = CompletableFuture<ShellTerminalWidget>()
+
+        runInEdt {
+            val shellTerminalWidget = terminalView.createLocalShellWidget(project.basePath, null)
+            backendTerminalManager.shareTerminal(shellTerminalWidget, "Gitpod")
+            completableFuture.complete(shellTerminalWidget)
+        }
+
+        return completableFuture
+    }
+}

components/ide/jetbrains/backend-plugin/src/main/resources/META-INF/plugin.xml

@@ -16,6 +16,8 @@
     <depends>com.intellij.modules.platform</depends>
     <dependencies>
         <plugin id="Git4Idea"/>
+        <plugin id="org.jetbrains.plugins.terminal"/>
+        <plugin id="com.jetbrains.codeWithMe"/>
     </dependencies>
 
     <extensions defaultExtensionNs="com.intellij">
@@ -24,6 +26,7 @@
         <notificationGroup id="Gitpod Notifications" displayType="BALLOON" isLogByDefault="false" />
         <httpRequestHandler implementation="io.gitpod.jetbrains.remote.GitpodCLIService"/>
         <projectService serviceImplementation="io.gitpod.jetbrains.remote.GitpodClientProjectSessionTracker" client="guest" preload="true"/>
+        <projectService serviceImplementation="io.gitpod.jetbrains.remote.GitpodTerminalService" preload="true"/>
         <projectService serviceImplementation="io.gitpod.jetbrains.remote.GitpodProjectManager" preload="true"/>
     </extensions>