Allow custom Gradle installation to be used

CHANGELOG.md

@@ -4,6 +4,7 @@
 - `affected-paths-core`, `tooling-support-*`: Add in support for composite builds being analyzed
 - `affected-paths-core`: Remove filter of root project
 - `affected-paths-core`: Fix improper project mapping for file changes in nested projects
+- `affected-paths-core`: Allow a custom Gradle installation path to be passed in to the Gradle Tooling API
 
 ## v0.1.1
 - `tooling-support`: Fix crash from `SquareProjectModelBuilder` when used on a non-Java/Android project

affected-paths/app/src/main/kotlin/com/squareup/affected/paths/app/options/BaseConfigurationOptions.kt

@@ -112,4 +112,18 @@ internal class BaseConfigurationOptions {
   )
   var autoInject: Boolean = false
     internal set
+
+  @Option(
+    names = ["--changed-files"],
+    description = ["List of changed files to use instead of the Git diff"]
+  )
+  var changedFiles: List<String> = emptyList()
+    internal set
+
+  @Option(
+    names = ["--gradle-installation-path"],
+    description = ["Use a custom Gradle installation"]
+  )
+  var gradleInstallationPath: Path? = null
+    internal set
 }

affected-paths/app/src/main/kotlin/com/squareup/affected/paths/app/utils/CoreOptionsUtils.kt

@@ -31,6 +31,8 @@ internal fun BaseConfigurationOptions.toCoreOptions(): CoreOptions {
     maxGradleMemory = maxGradleMemory,
     customJvmFlags = listOf("-XX:-MaxFDLimit"),
     customGradleFlags = listOf("--stacktrace"),
-    autoInjectPlugin = autoInject
+    autoInjectPlugin = autoInject,
+    changedFiles = changedFiles,
+    gradleInstallationPath = gradleInstallationPath,
   )
 }

affected-paths/core/src/main/kotlin/com/squareup/affected/paths/core/CoreAnalyzer.kt

@@ -77,10 +77,15 @@ public class CoreAnalyzer @JvmOverloads constructor(private val coreOptions: Cor
         val projectsDeferred = projects?.let { CompletableDeferred(it) } ?: async(Dispatchers.IO) {
           ensureActive() // In case this is cancelled before start
 
-          val projectConnector = affectedPathsApplication.koin.get<GradleConnector>()
-            .forProjectDirectory(rootDir.toFile())
-            .useBuildDistribution()
-            .connect()
+          val projectConnector = with(affectedPathsApplication.koin.get<GradleConnector>()) {
+            forProjectDirectory(rootDir.toFile())
+            if (coreOptions.gradleInstallationPath != null) {
+              useInstallation(coreOptions.gradleInstallationPath.toFile())
+            } else {
+              useBuildDistribution()
+            }
+            return@with connect()
+          }
 
           ensureActive()
 

affected-paths/core/src/main/kotlin/com/squareup/affected/paths/core/CoreOptions.kt

@@ -69,6 +69,9 @@ public data class CoreOptions @JvmOverloads constructor(
 
   /** Include any "includeBuild" builds from the current build */
   val useIncludeBuild: Boolean = true,
+
+  /** Pass in a custom Gradle installation, instead of using the build distribution */
+  val gradleInstallationPath: Path? = null,
 ) {
 
   init {