Pill: Add 'unpill' task

buildSrc/src/main/kotlin/pill/plugin.kt

@@ -96,7 +96,11 @@ class JpsCompatibleRootPlugin : Plugin<Project> {
         }
 
         project.tasks.create("pill") {
-            this.doLast { pill(project) }
+            doLast { pill(project) }
+        }
+
+        project.tasks.create("unpill") {
+            doLast { unpill(project) }
         }
     }
 
@@ -105,24 +109,24 @@ class JpsCompatibleRootPlugin : Plugin<Project> {
     private lateinit var platformBaseNumber: String
     private lateinit var platformDir: File
 
-    private fun pill(project: Project) {
+    private fun initEnvironment(project: Project) {
         projectDir = project.projectDir
         platformVersion = project.extensions.extraProperties.get("versions.intellijSdk").toString()
         platformBaseNumber = platformVersion.substringBefore(".", "").takeIf { it.isNotEmpty() }
                 ?: error("Invalid platform version: $platformVersion")
         platformDir = File(projectDir, "buildSrc/prepare-deps/intellij-sdk/build/repo/kotlin.build.custom.deps/$platformVersion")
+    }
+
+    private fun pill(project: Project) {
+        initEnvironment(project)
 
         val jpsProject = parse(project, ParserContext(dependencyMappers))
             .mapLibraries(this::attachPlatformSources, this::attachAsmSources)
 
         val files = render(jpsProject, getProjectLibraries(jpsProject))
 
-        File(projectDir, ".idea/libraries").deleteRecursively()
-
-        File(projectDir, ".idea/runConfigurations")
-            .walk()
-            .filter { it.name.startsWith("JPS_") && it.extension.toLowerCase() == "xml" }
-            .forEach { it.delete() }
+        removeExistingIdeaLibraries()
+        removeJpsRunConfigurations()
 
         copyRunConfigurations()
         setOptionsForDefaultJunitRunConfiguration(project)
@@ -134,6 +138,24 @@ class JpsCompatibleRootPlugin : Plugin<Project> {
         }
     }
 
+    private fun unpill(project: Project) {
+        initEnvironment(project)
+
+        removeExistingIdeaLibrariesAndModules()
+        removeJpsRunConfigurations()
+    }
+
+    private fun removeExistingIdeaLibraries() {
+        File(projectDir, ".idea/libraries").deleteRecursively()
+    }
+
+    private fun removeJpsRunConfigurations() {
+        File(projectDir, ".idea/runConfigurations")
+            .walk()
+            .filter { it.name.startsWith("JPS_") && it.extension.toLowerCase() == "xml" }
+            .forEach { it.delete() }
+    }
+
     private fun copyRunConfigurations() {
         val runConfigurationsDir = File(projectDir, "buildSrc/src/main/kotlin/pill/runConfigurations")
         val targetDir = File(projectDir, ".idea/runConfigurations")