Add test for configuration cache bug

This is a test for the scenario in #2837
which has since been fixed already.

wire-gradle-plugin/src/test/kotlin/com/squareup/wire/gradle/WirePluginTest.kt

@@ -1458,6 +1458,16 @@ class WirePluginTest {
     buildCacheDir.deleteRecursively()
   }
 
+  @Test
+  fun configurationCacheFailure() {
+    val fixtureRoot = File("src/test/projects/configuration-cache-failure")
+
+    val result = gradleRunner.runFixture(fixtureRoot) {
+      withArguments("clean", "generateMainProtos", "--stacktrace", "--info").build()
+    }
+    assertThat(result.task(":generateMainProtos")?.outcome).isEqualTo(TaskOutcome.SUCCESS)
+  }
+
   private fun GradleRunner.runFixture(
     root: File,
     action: GradleRunner.() -> BuildResult,

wire-gradle-plugin/src/test/projects/configuration-cache-failure/build.gradle.kts

@@ -0,0 +1,37 @@
+plugins {
+  id("com.squareup.wire")
+  id("org.jetbrains.kotlin.jvm") version "1.9.22"
+}
+
+val genProtosDir = "$buildDir/generated/proto"
+
+tasks.register("genProto") {
+  val outFile = project.file("$genProtosDir/period.proto")
+  outputs.file(outFile)
+  doLast {
+    outFile.writeText("""
+      syntax = "proto2";
+
+      enum Period {
+        CRETACEOUS = 1;
+      }
+    """)
+  }
+}
+
+tasks.matching { it.name == "generateMainProtos" }.configureEach {
+  dependsOn("genProto")
+}
+
+wire {
+  sourcePath {
+    srcDir("src/main/proto/")
+  }
+
+  sourcePath {
+    srcDir(genProtosDir)
+  }
+
+  kotlin {
+  }
+}

wire-gradle-plugin/src/test/projects/configuration-cache-failure/gradle.properties

@@ -0,0 +1,4 @@
+org.gradle.caching=false
+org.gradle.unsafe.configuration-cache=true
+org.gradle.configuration-cache=true
+VERSION_NAME=5.0.0-SNAPSHOT

wire-gradle-plugin/src/test/projects/configuration-cache-failure/src/main/proto/dinosaur.proto

@@ -0,0 +1,7 @@
+syntax = "proto2";
+
+import "period.proto";
+
+message Dinosaur {
+  optional Period period = 5;
+}