Fix plugin not working if module has a lot of dependencies

focus-gradle-plugin/api/focus-gradle-plugin.api

@@ -13,6 +13,7 @@ public abstract class com/dropbox/focus/CreateFocusSettingsTask : org/gradle/api
 	public static final field Companion Lcom/dropbox/focus/CreateFocusSettingsTask$Companion;
 	public fun <init> ()V
 	public final fun createFocusSettings ()V
+	public abstract fun getModulesToDirMapFile ()Lorg/gradle/api/file/RegularFileProperty;
 	public abstract fun getSettingsFile ()Lorg/gradle/api/file/RegularFileProperty;
 }
 
@@ -45,6 +46,7 @@ public final class com/dropbox/focus/FocusPlugin$apply$1$1$1$inlined$sam$i$org_g
 public abstract class com/dropbox/focus/FocusSubExtension {
 	public fun <init> (Lorg/gradle/api/file/ProjectLayout;Lorg/gradle/api/model/ObjectFactory;)V
 	public final fun getFocusSettingsFile ()Lorg/gradle/api/file/RegularFileProperty;
+	public final fun getModuleToDirMapFile ()Lorg/gradle/api/file/RegularFileProperty;
 }
 
 public abstract class com/dropbox/focus/FocusTask : org/gradle/api/DefaultTask {

focus-gradle-plugin/src/main/kotlin/com/dropbox/focus/CreateFocusSettingsTask.kt

@@ -3,7 +3,6 @@ package com.dropbox.focus
 import org.gradle.api.DefaultTask
 import org.gradle.api.Project
 import org.gradle.api.artifacts.ProjectDependency
-import org.gradle.api.artifacts.SelfResolvingDependency
 import org.gradle.api.file.RegularFileProperty
 import org.gradle.api.tasks.OutputFile
 import org.gradle.api.tasks.TaskAction
@@ -15,6 +14,9 @@ public abstract class CreateFocusSettingsTask : DefaultTask() {
   @get:OutputFile
   public abstract val settingsFile: RegularFileProperty
 
+  @get:OutputFile
+  public abstract val modulesToDirMapFile: RegularFileProperty
+
   init {
     outputs.upToDateWhen { false }
   }
@@ -23,29 +25,38 @@ public abstract class CreateFocusSettingsTask : DefaultTask() {
   public fun createFocusSettings() {
     val dependencies = project.collectDependencies().sortedBy { it.path }
 
+    // generate CSV mapping from module name to its absolute path
+    modulesToDirMapFile.get().asFile.writer().use { writer ->
+
+      dependencies
+        .forEach { dep ->
+          val projectPath = dep.path
+          val projectDir = dep.projectDir
+          writer.appendLine("$projectPath,$projectDir")
+        }
+    }
+
     settingsFile.get().asFile.writer().use { writer ->
       writer.write("// ${project.path} specific settings\n")
       writer.appendLine("//")
       writer.appendLine("// This file is autogenerated by the focus task. Changes will be overwritten.")
       writer.appendLine()
 
-      // Add the includes statements
-      dependencies.forEach { dep ->
-        writer.appendLine("include(\"${dep.path}\")")
-      }
-
-      writer.appendLine()
-
-      // Add overrides for projects with a root that's different from the gradle path
-      dependencies
-        .forEach { dep ->
-          val gradleProjectPath = dep.path.substring(1).replace(":", "/")
-          if (project.rootDir.resolve(gradleProjectPath) != dep.projectDir) {
-            val gradleProjectDir = dep.projectDir.path.replace("\\", "\\\\")
-            // language=groovy
-            writer.appendLine("""project("${dep.path}").projectDir = new File('$gradleProjectDir')""")
+      // language=groovy
+      writer.append(
+        """
+        File f = new File('${modulesToDirMapFile.get().asFile.absolutePath}')
+        if (f.exists()) {
+          f.eachLine { line ->
+            var values = line.split(",")
+            var module = values[0]
+            var path = values[1]
+            include(module)
+            project(module).projectDir = new File(path)
           }
         }
+        """.trimIndent()
+      )
     }
   }
 
@@ -71,6 +82,7 @@ public abstract class CreateFocusSettingsTask : DefaultTask() {
     public operator fun invoke(subExtension: FocusSubExtension): CreateFocusSettingsTask.() -> Unit = {
       group = FOCUS_TASK_GROUP
       settingsFile.set(subExtension.focusSettingsFile)
+      modulesToDirMapFile.set(subExtension.moduleToDirMapFile)
       notCompatibleWithConfigurationCache("This reads configurations from the project at action-time.")
     }
   }

focus-gradle-plugin/src/main/kotlin/com/dropbox/focus/FocusSubExtension.kt

@@ -16,4 +16,7 @@ public abstract class FocusSubExtension @Inject constructor(
     layout.buildDirectory.file("focus.settings.gradle")
   )
 
+  public val moduleToDirMapFile: RegularFileProperty = objects.fileProperty().convention(
+    layout.buildDirectory.file("moduleToDirMap.csv")
+  )
 }

focus-gradle-plugin/src/test/kotlin/com/dropbox/focus/FocusPluginTest.kt

@@ -2,7 +2,7 @@ package com.dropbox.focus
 
 import com.google.common.truth.Truth.assertThat
 import java.io.File
-import java.time.temporal.Temporal
+import java.util.regex.Pattern
 import org.gradle.testkit.runner.BuildResult
 import org.gradle.testkit.runner.GradleRunner
 import org.junit.Before
@@ -51,17 +51,46 @@ class FocusPluginTest {
   }
 
   @Test
-  fun singleQuotePath() {
-    val fixtureRoot = File("src/test/projects/single-quote-path")
+  fun allPathLiteralsAreSingleQuote() {
+    val fixtureRoot = File("src/test/projects/happy-path")
+    gradleRunner
+      .withArguments(":module:focus")
+      .runFixture(fixtureRoot) { build() }
+
+    val focusFileContent =
+      File("src/test/projects/happy-path/build/notnowhere/build/focus.settings.gradle").readText()
+    // has at least one single-quote path literal
+    assertThat(focusFileContent).matches(Pattern.compile(""".*new File\('.*'\).*""", Pattern.DOTALL))
+    // no double-quote path literals
+    assertThat(focusFileContent).doesNotMatch(Pattern.compile(""".*new File\(".*"\).*""", Pattern.DOTALL))
+  }
+
+  @Test
+  fun happyPath_CsvCreated() {
+    val fixtureRoot = File("src/test/projects/happy-path")
 
     gradleRunner
       .withArguments(":module:focus")
       .runFixture(fixtureRoot) { build() }
 
-    val focusFileContent = File("src/test/projects/single-quote-path/build/notnowhere/build/focus.settings.gradle").readText()
+    val csvFileContents = File("src/test/projects/happy-path/build/notnowhere/build/moduleToDirMap.csv").readText()
     val absoluteFilePath = fixtureRoot.resolve("build/notnowhere").absolutePath.replace("\\", "\\\\")
+    // language=csv
+    assertThat(csvFileContents).contains(""":module,$absoluteFilePath""")
+  }
+
+  @Test
+  fun happyPath_CsvRead() {
+    val fixtureRoot = File("src/test/projects/happy-path")
+
+    gradleRunner
+      .withArguments(":module:focus")
+      .runFixture(fixtureRoot) { build() }
+
+    val csvFilePath = File("src/test/projects/happy-path/build/notnowhere/build/moduleToDirMap.csv").absolutePath
+    val focusFileContent = File("src/test/projects/happy-path/build/notnowhere/build/focus.settings.gradle").readText()
     // language=groovy
-    assertThat(focusFileContent).contains("""project(":module").projectDir = new File('$absoluteFilePath')""")
+    assertThat(focusFileContent).contains("""File f = new File('$csvFilePath')""")
   }
 
   private fun GradleRunner.runFixture(