Support other extensions for published image

README.md

@@ -45,6 +45,7 @@ When applied, the plugin creates the following tasks:
 - `bufFormatApply` applies [`buf format`](https://buf.build/docs/format/style/)
 - `bufFormatCheck` validates [`buf format`](https://buf.build/docs/format/style/)
 - `bufLint` validates [`buf lint`](https://buf.build/docs/breaking/overview/)
+- `bufBuild` builds an image with [`buf build`](https://buf.build/docs/reference/cli/buf/build)
 - `bufBreaking` checks Protobuf schemas against a previous version for backwards-incompatible changes through [`buf breaking`](https://buf.build/docs/breaking/overview/)
 - `bufGenerate` generates Protobuf code with [`buf generate`](https://buf.build/docs/generate/overview/)
 
@@ -203,6 +204,34 @@ buf {
 
 `bufLint` is configured by creating `buf.yaml` in basic projects or projects using the `protobuf-gradle-plugin`. It is run automatically during the `check` task. Specification of `buf.yaml` is not supported for projects using a workspace.
 
+### `bufBuild`
+
+`bufBuild` is configured with the `build` closure:
+
+```kotlin
+buf {
+    build {
+        imageFormat = ImageFormat.JSON // JSON by default
+        compressionFormat = CompressionFormat.GZ // null by default (no compression)
+    }
+}
+```
+
+Available image formats are:
+
+- `binpb`
+- `bin`
+- `json`
+- `txtpb`
+
+Available compression formats are:
+
+- `gz`
+- `zst`
+
+The file is built in the `bufbuild` directory in the project's build directory and has the name `image` followed by
+the image format and optionally the compression format, e.g. `build/bufbuild/image.bin.zst`.
+
 ### `bufBreaking`
 
 `bufBreaking` is more complicated since it requires a previous version of the Protobuf schema to validate the current version. Buf's built-in git integration isn't quite enough since it requires a buildable Protobuf source set, and the `protobuf-gradle-plugin`'s extraction step typically targets the project build directory which is ephemeral and is not committed.

src/main/kotlin/build/buf/gradle/BufExtension.kt

@@ -51,6 +51,15 @@ open class BufExtension {
      */
     var toolVersion = "1.27.1"
 
+    internal var buildDetails: BuildDetails? = null
+
+    /**
+     * Specify the build details for image generation.
+     */
+    fun build(configure: Action<BuildDetails>) {
+        buildDetails = (buildDetails ?: BuildDetails()).apply(configure::execute)
+    }
+
     internal var imageArtifactDetails: ArtifactDetails? = null
 
     /**
@@ -70,6 +79,33 @@ open class BufExtension {
     }
 }
 
+enum class ImageFormat(
+    internal val formatName: String,
+) {
+    BINPB("binpb"),
+    BIN("bin"),
+    JSON("json"),
+    TXTPB("txtpb"),
+}
+
+enum class CompressionFormat(
+    internal val ext: String,
+) {
+    GZ("gz"),
+    ZST("zst"),
+}
+
+class BuildDetails(
+    /**
+     * The format of the built image.
+     */
+    var imageFormat: ImageFormat = ImageFormat.JSON,
+    /**
+     * The compression, if any, of the built image.
+     */
+    var compressionFormat: CompressionFormat? = null,
+)
+
 class ArtifactDetails(
     var groupId: String? = null,
     var artifactId: String? = null,

src/main/kotlin/build/buf/gradle/BuildConfiguration.kt

@@ -24,7 +24,7 @@ import org.gradle.language.base.plugins.LifecycleBasePlugin.BUILD_GROUP
 import java.io.File
 
 const val BUF_BUILD_TASK_NAME = "bufBuild"
-const val BUF_BUILD_PUBLICATION_FILE_NAME = "image.json"
+private const val BUF_BUILD_PUBLICATION_FILE_BASE_NAME = "image"
 const val BUF_IMAGE_PUBLICATION_NAME = "bufImagePublication"
 
 internal fun Project.configureBuild() {
@@ -52,13 +52,20 @@ internal fun Project.configureImagePublication(artifactDetails: ArtifactDetails)
 
             artifact(bufBuildPublicationFile) {
                 builtBy(tasks.named(BUF_BUILD_TASK_NAME))
+                extension = bufBuildPublicationFileExtension
             }
         }
     }
 }
 
-internal val Project.bufBuildPublicationFile
-    get() = File(bufbuildDir, BUF_BUILD_PUBLICATION_FILE_NAME)
+private val Project.bufBuildPublicationFileExtension
+    get() =
+        (getExtension().buildDetails ?: BuildDetails()).let { deets ->
+            deets.imageFormat.formatName + deets.compressionFormat?.let { ".${it.ext}" }.orEmpty()
+        }
+
+private val Project.bufBuildPublicationFile
+    get() = File(bufbuildDir, "$BUF_BUILD_PUBLICATION_FILE_BASE_NAME.$bufBuildPublicationFileExtension")
 
 internal val Task.bufBuildPublicationFile
     get() = project.bufBuildPublicationFile

src/test/kotlin/build/buf/gradle/AbstractBreakingTest.kt

@@ -14,9 +14,12 @@
 
 package build.buf.gradle
 
+import build.buf.gradle.ImageGenerationSupport.replaceBuildDetails
 import com.google.common.truth.Truth.assertThat
 import org.gradle.testkit.runner.TaskOutcome.FAILED
 import org.junit.jupiter.api.Test
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.MethodSource
 import java.nio.file.Path
 
 abstract class AbstractBreakingTest : AbstractBufIntegrationTest() {
@@ -32,6 +35,17 @@ abstract class AbstractBreakingTest : AbstractBufIntegrationTest() {
         checkBreaking()
     }
 
+    @ParameterizedTest
+    @MethodSource("build.buf.gradle.ImageGenerationSupport#publicationFileExtensionTestCase")
+    fun `breaking schema with specified publication file extension`(
+        format: String,
+        compression: String?,
+    ) {
+        replaceBuildDetails(format, compression)
+        publishRunner().build()
+        checkBreaking()
+    }
+
     @Test
     fun `normally breaking schema with an ignore`() {
         publishRunner().build()

src/test/kotlin/build/buf/gradle/AbstractBuildTest.kt

@@ -14,21 +14,24 @@
 
 package build.buf.gradle
 
+import build.buf.gradle.ImageGenerationSupport.replaceBuildDetails
 import com.google.common.truth.Truth.assertThat
 import org.gradle.testkit.runner.TaskOutcome.SUCCESS
 import org.junit.jupiter.api.Test
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.MethodSource
 import java.io.File
 import java.nio.file.Paths
 
 abstract class AbstractBuildTest : AbstractBufIntegrationTest() {
     @Test
     fun `build image with explicit artifact details`() {
-        assertImageGeneration()
+        assertImageGeneration("image.json")
     }
 
     @Test
     fun `build image with inferred artifact details`() {
-        assertImageGeneration()
+        assertImageGeneration("image.json")
     }
 
     @Test
@@ -38,6 +41,17 @@ abstract class AbstractBuildTest : AbstractBufIntegrationTest() {
         assertThat(result.output).contains("found 0")
     }
 
+    @ParameterizedTest
+    @MethodSource("build.buf.gradle.ImageGenerationSupport#publicationFileExtensionTestCase")
+    fun `build image with specified publication file extension`(
+        format: String,
+        compression: String?,
+    ) {
+        replaceBuildDetails(format, compression)
+        val extension = format + (compression?.let { ".$compression" } ?: "")
+        assertImageGeneration("image.$extension")
+    }
+
     @Test
     fun `build image with two publications should fail`() {
         val result = buildRunner().buildAndFail()
@@ -47,7 +61,7 @@ abstract class AbstractBuildTest : AbstractBufIntegrationTest() {
 
     @Test
     fun `build image with two publications should succeed if details are provided explicitly`() {
-        assertImageGeneration()
+        assertImageGeneration("image.json")
     }
 
     @Test
@@ -60,9 +74,9 @@ abstract class AbstractBuildTest : AbstractBufIntegrationTest() {
         )
     }
 
-    private fun assertImageGeneration() {
+    private fun assertImageGeneration(publicationFileName: String) {
         assertThat(buildRunner().build().task(":$BUF_BUILD_TASK_NAME")?.outcome).isEqualTo(SUCCESS)
-        val image = Paths.get(projectDir.path, "build", "bufbuild", "image.json").toFile().readText()
+        val image = Paths.get(projectDir.path, "build", "bufbuild", publicationFileName).toFile().readText()
         assertThat(image).isNotEmpty()
     }
 

src/test/kotlin/build/buf/gradle/ImageGenerationSupport.kt

@@ -0,0 +1,31 @@
+package build.buf.gradle
+
+import com.google.common.collect.Lists
+import org.junit.jupiter.params.provider.Arguments
+
+private val NULL_SENTINEL = Any()
+
+object ImageGenerationSupport {
+    @JvmStatic
+    fun publicationFileExtensionTestCase() =
+        Lists.cartesianProduct(
+            ImageFormat.values().map { it.formatName },
+            CompressionFormat.values().map { it.ext } + NULL_SENTINEL,
+        ).map { imageAndCompression ->
+            Arguments.of(imageAndCompression[0], imageAndCompression[1].takeIf { it != NULL_SENTINEL })
+        }
+
+    fun AbstractBufIntegrationTest.replaceBuildDetails(
+        format: String,
+        compression: String?,
+    ) {
+        buildFile.replace(
+            "imageFormat = REPLACEME",
+            "imageFormat = '$format'",
+        )
+        buildFile.replace(
+            "compressionFormat = REPLACEME",
+            "compressionFormat = ${compression?.let { "'$it'" }}",
+        )
+    }
+}

src/test/resources/BreakingTest/breaking_schema_with_specified_publication_file_extension/buf/test/v1/test.proto

@@ -0,0 +1,19 @@
+// Copyright 2023 Buf Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package buf.test.v1;
+
+message BasicMessage {}

src/test/resources/BreakingTest/breaking_schema_with_specified_publication_file_extension/build.gradle

@@ -0,0 +1,32 @@
+plugins {
+    id 'java'
+    id 'build.buf'
+    id 'maven-publish'
+}
+
+repositories {
+    mavenCentral()
+    maven { url 'build/repos/test' }
+}
+
+publishing {
+    repositories {
+        maven { url 'build/repos/test' }
+    }
+}
+
+buf {
+    publishSchema = true
+    //previousVersion = '2319'
+
+    build {
+        imageFormat = REPLACEME
+        compressionFormat = REPLACEME
+    }
+
+    imageArtifact {
+        groupId = 'foo'
+        artifactId = 'bar'
+        version = '2319'
+    }
+}

src/test/resources/BreakingWithProtobufGradleTest/breaking_schema_with_specified_publication_file_extension/build.gradle

@@ -0,0 +1,41 @@
+plugins {
+    id 'java'
+    id 'com.google.protobuf' version "$protobufGradleVersion"
+    id 'build.buf'
+    id 'maven-publish'
+}
+
+repositories {
+    mavenCentral()
+    maven { url 'build/repos/test' }
+}
+
+protobuf {
+    protoc {
+        artifact = "com.google.protobuf:protoc:$protobufVersion"
+    }
+}
+
+compileJava.enabled = false
+
+publishing {
+    repositories {
+        maven { url 'build/repos/test' }
+    }
+}
+
+buf {
+    publishSchema = true
+    //previousVersion = '2319'
+
+    build {
+        imageFormat = REPLACEME
+        compressionFormat = REPLACEME
+    }
+
+    imageArtifact {
+        groupId = 'foo'
+        artifactId = 'bar'
+        version = '2319'
+    }
+}

src/test/resources/BreakingWithProtobufGradleTest/breaking_schema_with_specified_publication_file_extension/src/main/proto/buf/test/v1/test.proto

@@ -0,0 +1,19 @@
+// Copyright 2023 Buf Technologies, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package buf.test.v1;
+
+message BasicMessage {}

src/test/resources/BreakingWithWorkspaceTest/breaking_schema_with_specified_publication_file_extension/buf.work.yaml

@@ -0,0 +1,3 @@
+version: v1
+directories:
+  - workspace