[IFT] Fix empty Git Log in Git lessons

For some reason it is not updated properly during Git repository initialization and first showing of Git Log tool window. Annotate lesson stuck because of it.

GitOrigin-RevId: 2bd39f47b813fe2a9dd265f092aa2e012d8b454b

plugins/git-features-trainer/src/training/git/GitLessonsUtil.kt

@@ -20,8 +20,10 @@ import com.intellij.openapi.vcs.VcsApplicationSettings
 import com.intellij.openapi.vcs.VcsBundle
 import com.intellij.openapi.vcs.actions.commit.CommonCheckinProjectAction
 import com.intellij.openapi.vcs.update.CommonUpdateProjectAction
+import com.intellij.openapi.wm.ToolWindow
 import com.intellij.openapi.wm.ToolWindowId
 import com.intellij.openapi.wm.ToolWindowManager
+import com.intellij.openapi.wm.ex.ToolWindowManagerListener
 import com.intellij.ui.SearchTextField
 import com.intellij.util.ui.UIUtil
 import com.intellij.vcs.commit.CommitModeManager
@@ -72,6 +74,20 @@ object GitLessonsUtil {
     }
   }
 
+  fun LessonContext.refreshGitLogOnOpen() {
+    prepareRuntimeTask {
+      val connection = project.messageBus.connect(lessonDisposable)
+      connection.subscribe(ToolWindowManagerListener.TOPIC, object : ToolWindowManagerListener {
+        override fun toolWindowShown(toolWindow: ToolWindow) {
+          if (toolWindow.id == ToolWindowId.VCS) {
+            VcsProjectLog.getInstance(project).mainLogUi?.refresher?.setValid(true, false)
+            connection.disconnect()
+          }
+        }
+      })
+    }
+  }
+
   fun TaskContext.highlightSubsequentCommitsInGitLog(startCommitRow: Int,
                                                      sequenceLength: Int = 1,
                                                      highlightInside: Boolean = true,

plugins/git-features-trainer/src/training/git/lesson/GitLesson.kt

@@ -5,6 +5,8 @@ import com.intellij.openapi.project.Project
 import git4idea.config.GitExecutableManager
 import org.jetbrains.annotations.Nls
 import org.jetbrains.annotations.NonNls
+import training.dsl.LessonContext
+import training.git.GitLessonsUtil.refreshGitLogOnOpen
 import training.git.GitProjectUtil
 import training.learn.course.KLesson
 import training.learn.course.LessonProperties
@@ -14,6 +16,12 @@ abstract class GitLesson(@NonNls id: String, @Nls name: String) : KLesson(id, na
   protected abstract val branchName: String
   override val properties = LessonProperties(availableSince = "212")
 
+  override val fullLessonContent: LessonContext.() -> Unit
+    get() = {
+      refreshGitLogOnOpen()
+      super.fullLessonContent(this)
+    }
+
   override fun prepare(project: Project) {
     if (GitExecutableManager.getInstance().testGitExecutableVersionValid(project)) {
       GitProjectUtil.restoreGitLessonsFiles(project, branchName)

plugins/ide-features-trainer/src/training/learn/course/KLesson.kt

@@ -23,7 +23,7 @@ abstract class KLesson(@NonNls id: String, @Nls name: String) : Lesson(id, name)
   override lateinit var module: IftModule
     internal set
 
-  val fullLessonContent: LessonContext.() -> Unit get() = {
+  open val fullLessonContent: LessonContext.() -> Unit get() = {
     showWarningIfLessonsDisabled()
     showIndexingTask()
     lessonContent()