Remove checked in generated code (#263)

Update codegen to generate to the build directory to minimize the code
in this project and match other protovalidate projects.

Upgrade to Gradle 8.13.

Author: pkwarren

.gitattributes

@@ -1,4 +1,5 @@
 version: v2
+clean: true
 plugins:
   - remote: buf.build/protocolbuffers/java:v30.2
-    out: src/main/java
+    out: build/generated/sources/bufgen

buf.gen.yaml

@@ -64,9 +64,9 @@ tasks.register<Exec>("licenseHeader") {
         "--year-range",
         project.findProperty("license-header.years")!!.toString(),
         "--ignore",
-        "src/main/java/build/buf/validate/",
+        "build/generated/sources/bufgen/",
         "--ignore",
-        "conformance/src/main/java/build/buf/validate/conformance/",
+        "conformance/build/generated/sources/bufgen/",
         "--ignore",
         "src/main/resources/buf/validate/",
     )
@@ -109,43 +109,28 @@ tasks.register<Exec>("exportProtovalidateModule") {
 
 tasks.register<Exec>("generateSources") {
     dependsOn("exportProtovalidateModule")
-    description = "Generates sources for the bufbuild/protovalidate module sources to src/main/java."
+    description = "Generates sources for the bufbuild/protovalidate module sources to build/generated/sources/bufgen."
     commandLine(buf.asPath, "generate", "--template", "buf.gen.yaml", "src/main/resources")
 }
 
-tasks.register<Exec>("generateConformance") {
-    dependsOn("configureBuf")
-    description = "Generates sources for the bufbuild/protovalidate-testing module to conformance/src/main/java."
-    commandLine(
-        buf.asPath,
-        "generate",
-        "--template",
-        "conformance/buf.gen.yaml",
-        "-o",
-        "conformance/",
-        "buf.build/bufbuild/protovalidate-testing:${project.findProperty("protovalidate.version")}",
-    )
-}
-
 tasks.register("generate") {
     description = "Generates sources with buf generate and buf export."
     dependsOn(
         "generateTestSources",
         "generateSources",
-        "generateConformance",
         "licenseHeader",
     )
 }
 
 tasks.withType<JavaCompile> {
-    dependsOn("generateTestSources")
+    dependsOn("generate")
     if (JavaVersion.current().isJava9Compatible) {
         doFirst {
             options.compilerArgs = mutableListOf("--release", "8")
         }
     }
     // Disable errorprone on generated code
-    options.errorprone.excludedPaths.set("(.*/src/main/java/build/buf/validate/.*|.*/build/generated/.*)")
+    options.errorprone.excludedPaths.set(".*/build/generated/.*")
     if (!name.lowercase().contains("test")) {
         options.errorprone {
             check("NullAway", CheckSeverity.ERROR)
@@ -173,6 +158,11 @@ buildscript {
 }
 
 sourceSets {
+    main {
+        java {
+            srcDir(layout.buildDirectory.dir("generated/sources/bufgen"))
+        }
+    }
     test {
         java {
             srcDir(layout.buildDirectory.dir("generated/test-sources/bufgen"))
@@ -183,7 +173,7 @@ sourceSets {
 apply(plugin = "com.diffplug.spotless")
 configure<SpotlessExtension> {
     java {
-        targetExclude("src/main/java/build/buf/validate/**/*.java", "build/generated/test-sources/bufgen/**/*.java")
+        targetExclude("build/generated/sources/bufgen/build/buf/validate/**/*.java", "build/generated/test-sources/bufgen/**/*.java")
     }
     kotlinGradle {
         ktlint()

build.gradle.kts

@@ -1,9 +1,10 @@
 version: v2
+clean: true
 managed:
   enabled: true
   override:
     - file_option: java_package_prefix
       value: build
 plugins:
   - remote: buf.build/protocolbuffers/java:v30.2
-    out: src/main/java
+    out: build/generated/sources/bufgen

conformance/buf.gen.yaml

@@ -7,6 +7,14 @@ plugins {
     application
     java
     alias(libs.plugins.errorprone)
+    alias(libs.plugins.osdetector)
+}
+
+val buf: Configuration by configurations.creating
+
+tasks.register("configureBuf") {
+    description = "Installs the Buf CLI."
+    File(buf.asPath).setExecutable(true)
 }
 
 val conformanceCLIFile =
@@ -39,14 +47,35 @@ tasks.register<Exec>("conformance") {
     commandLine(*(listOf(conformanceCLIPath) + conformanceArgs + listOf(conformanceAppScript)).toTypedArray())
 }
 
+tasks.register<Exec>("generateConformance") {
+    dependsOn("configureBuf")
+    description = "Generates sources for the bufbuild/protovalidate-testing module to build/generated/sources/bufgen."
+    commandLine(
+        buf.asPath,
+        "generate",
+        "--template",
+        "buf.gen.yaml",
+        "buf.build/bufbuild/protovalidate-testing:${project.findProperty("protovalidate.version")}",
+    )
+}
+
+sourceSets {
+    main {
+        java {
+            srcDir(layout.buildDirectory.dir("generated/sources/bufgen"))
+        }
+    }
+}
+
 tasks.withType<JavaCompile> {
+    dependsOn("generateConformance")
     if (JavaVersion.current().isJava9Compatible) {
         doFirst {
             options.compilerArgs = mutableListOf("--release", "8")
         }
     }
     // Disable errorprone on generated code
-    options.errorprone.excludedPaths.set(".*/src/main/java/build/buf/validate/conformance/.*")
+    options.errorprone.excludedPaths.set(".*/build/generated/sources/bufgen/.*")
 }
 
 // Disable javadoc for conformance tests
@@ -81,7 +110,7 @@ tasks {
 apply(plugin = "com.diffplug.spotless")
 configure<SpotlessExtension> {
     java {
-        targetExclude("src/main/java/build/buf/validate/**/*.java")
+        targetExclude("build/generated/sources/bufgen/**/*.java")
     }
 }
 
@@ -92,6 +121,9 @@ dependencies {
 
     implementation(libs.assertj)
     implementation(platform(libs.junit.bom))
+
+    buf("build.buf:buf:${libs.versions.buf.get()}:${osdetector.classifier}@exe")
+
     testImplementation("org.junit.jupiter:junit-jupiter")
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")