Fix install git hook task breaks configuration cache.

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 ### Fixed
   - Pre-commit hook causing conflicts ([issue: #443](https://github.com/JLLeitschuh/ktlint-gradle/issues/443)) ([#502](https://github.com/JLLeitschuh/ktlint-gradle/pull/502))
   - `ktlintFormat` create empty directories in `src/` dir ([issue: #423](https://github.com/JLLeitschuh/ktlint-gradle/issues/423))
+  - Add Git hook task breaks configuration cache ([issue: #505](https://github.com/JLLeitschuh/ktlint-gradle/issues/505))
 
 ### Removed
   - ?

plugin/src/main/kotlin/org/jlleitschuh/gradle/ktlint/GitHook.kt

@@ -2,9 +2,12 @@ package org.jlleitschuh.gradle.ktlint
 
 import org.eclipse.jgit.lib.RepositoryBuilder
 import org.gradle.api.DefaultTask
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.file.ProjectLayout
 import org.gradle.api.model.ObjectFactory
 import org.gradle.api.provider.Property
 import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.InputDirectory
 import org.gradle.api.tasks.TaskAction
 import org.intellij.lang.annotations.Language
 import org.jlleitschuh.gradle.ktlint.tasks.BaseKtLintCheckTask
@@ -133,7 +136,8 @@ private fun KtlintPlugin.PluginHolder.addInstallGitHookCheckTask() {
 }
 
 open class KtlintInstallGitHookTask @Inject constructor(
-    objectFactory: ObjectFactory
+    objectFactory: ObjectFactory,
+    projectLayout: ProjectLayout
 ) : DefaultTask() {
     @get:Input
     internal val taskName: Property<String> = objectFactory.property(String::class.java)
@@ -144,9 +148,19 @@ open class KtlintInstallGitHookTask @Inject constructor(
     @get:Input
     internal val hookName: Property<String> = objectFactory.property(String::class.java)
 
+    @get:InputDirectory
+    internal val projectDir: DirectoryProperty = objectFactory.directoryProperty().apply {
+        set(projectLayout.projectDirectory)
+    }
+
+    @get:InputDirectory
+    internal val rootDirectory: DirectoryProperty = objectFactory.directoryProperty().apply {
+        set(project.rootDir)
+    }
+
     @TaskAction
     fun installHook() {
-        val repo = RepositoryBuilder().findGitDir(project.projectDir).setMustExist(false).build()
+        val repo = RepositoryBuilder().findGitDir(projectDir.get().asFile).setMustExist(false).build()
         if (!repo.objectDatabase.exists()) {
             logger.warn("No git folder was found!")
             return
@@ -159,7 +173,7 @@ open class KtlintInstallGitHookTask @Inject constructor(
             gitHookFile.createNewFile()
             gitHookFile.setExecutable(true)
         }
-        val gradleRootDirPrefix = project.rootDir.relativeTo(repo.workTree).path
+        val gradleRootDirPrefix = rootDirectory.get().asFile.relativeTo(repo.workTree).path
 
         if (gitHookFile.length() == 0L) {
             gitHookFile.writeText(

plugin/src/test/kotlin/org/jlleitschuh/gradle/ktlint/ConfigurationCacheTest.kt

@@ -93,4 +93,54 @@ class ConfigurationCacheTest : AbstractPluginTest() {
             }
         }
     }
+
+    @DisplayName("Should support configuration cache for git hook format install task")
+    @CommonTest
+    internal fun configurationCacheForGitHookFormatInstallTask(gradleVersion: GradleVersion) {
+        project(gradleVersion) {
+            projectPath.initGit()
+
+            build(
+                configurationCacheFlag,
+                configurationCacheWarnFlag,
+                INSTALL_GIT_HOOK_FORMAT_TASK
+            ) {
+                assertThat(task(":$INSTALL_GIT_HOOK_FORMAT_TASK")?.outcome).isEqualTo(TaskOutcome.SUCCESS)
+            }
+
+            build(
+                configurationCacheFlag,
+                configurationCacheWarnFlag,
+                INSTALL_GIT_HOOK_FORMAT_TASK
+            ) {
+                assertThat(task(":$INSTALL_GIT_HOOK_FORMAT_TASK")?.outcome).isEqualTo(TaskOutcome.SUCCESS)
+                assertThat(output).contains("Reusing configuration cache.")
+            }
+        }
+    }
+
+    @DisplayName("Should support configuration cache for git hook check install task")
+    @CommonTest
+    internal fun configurationCacheForGitHookCheckInstallTask(gradleVersion: GradleVersion) {
+        project(gradleVersion) {
+            projectPath.initGit()
+
+            build(
+                configurationCacheFlag,
+                configurationCacheWarnFlag,
+                INSTALL_GIT_HOOK_CHECK_TASK
+            ) {
+                assertThat(task(":$INSTALL_GIT_HOOK_CHECK_TASK")?.outcome).isEqualTo(TaskOutcome.SUCCESS)
+            }
+
+            build(
+                configurationCacheFlag,
+                configurationCacheWarnFlag,
+                INSTALL_GIT_HOOK_CHECK_TASK
+            ) {
+                assertThat(task(":$INSTALL_GIT_HOOK_CHECK_TASK")?.outcome).isEqualTo(TaskOutcome.SUCCESS)
+                assertThat(output).contains("Reusing configuration cache.")
+            }
+        }
+    }
 }

plugin/src/test/kotlin/org/jlleitschuh/gradle/ktlint/GitHookTasksTest.kt

@@ -1,7 +1,6 @@
 package org.jlleitschuh.gradle.ktlint
 
 import org.assertj.core.api.Assertions.assertThat
-import org.eclipse.jgit.lib.RepositoryBuilder
 import org.gradle.testkit.runner.TaskOutcome
 import org.gradle.util.GradleVersion
 import org.jlleitschuh.gradle.ktlint.testdsl.CommonTest
@@ -219,12 +218,6 @@ class GitHookTasksTest : AbstractPluginTest() {
         }
     }
 
-    private fun File.initGit(): File {
-        val repo = RepositoryBuilder().setWorkTree(this).setMustExist(false).build()
-        repo.create()
-        return repo.directory
-    }
-
     private fun File.preCommitGitHook(): File = gitHookFolder().resolve("pre-commit")
 
     private fun File.gitHookFolder(): File = resolve("hooks/")

plugin/src/test/kotlin/org/jlleitschuh/gradle/ktlint/TestsCommon.kt

@@ -1,5 +1,6 @@
 package org.jlleitschuh.gradle.ktlint
 
+import org.eclipse.jgit.lib.RepositoryBuilder
 import org.intellij.lang.annotations.Language
 import java.io.File
 
@@ -38,3 +39,9 @@ fun File.kotlinPluginProjectSetup(
         """.trimIndent()
     )
 }
+
+internal fun File.initGit(): File {
+    val repo = RepositoryBuilder().setWorkTree(this).setMustExist(false).build()
+    repo.create()
+    return repo.directory
+}