Add generateChangelog

Closes gh-9704

Author: rwinch

RELEASE.adoc

@@ -138,34 +138,19 @@ $ ./gradlew saganCreateRelease saganDeleteRelease -PgitHubAccessToken=<github-pe
 
 == 9. Update Release Notes on GitHub
 
-* Download
-https://github.com/spring-io/github-changelog-generator/releases/latest[the
-GitHub release notes generator]
+Generate the Release Notes replacing:
 
-....
-wget https://github.com/spring-io/github-changelog-generator/releases/download/v0.0.6/github-changelog-generator.jar
-....
-
-* Generate the release notes
-
-....
-java -jar github-changelog-generator.jar \
-    --changelog.repository=spring-projects/spring-security
-    --spring.config.location=scripts/release/release-notes-sections.yml \
-    $MILESTONE release-notes
-....
+* <next-version> - Replace with the milestone you are releasing now (i.e. 5.5.0-RC1)
 
-Note 1: `+$MILESTONE+` is something like `+5.2.1+` or `+5.3.0-M1+`. +
-Note 2: The location `+scripts/release/release-notes-sections.yml+` is
-relative to the `+spring-security+` repo. +
-Note 3: This will create a file on your filesystem
-called `+release-notes+`.
+----
+$ ./gradlew generateChangelog -P<next-version>
+----
 
 * Copy the release notes to your clipboard (your mileage may vary with
 the following command)
 
 ....
-cat release-notes | xclip -selection clipboard
+cat build/changelog/release-notes.md | xclip -selection clipboard
 ....
 
 * Create the

build.gradle

@@ -18,6 +18,7 @@ apply plugin: 'org.jetbrains.kotlin.jvm'
 apply plugin: 'org.springframework.security.update-dependencies'
 apply plugin: 'org.springframework.security.sagan'
 apply plugin: 'org.springframework.github.milestone'
+apply plugin: 'org.springframework.github.changelog'
 
 group = 'org.springframework.security'
 description = 'Spring Security'

buildSrc/build.gradle

@@ -52,6 +52,10 @@ gradlePlugin {
 			id = "org.springframework.github.milestone"
 			implementationClass = "org.springframework.gradle.github.milestones.GitHubMilestonePlugin"
 		}
+		githubChangelog {
+			id = "org.springframework.github.changelog"
+			implementationClass = "org.springframework.gradle.github.changelog.GitHubChangelogPlugin"
+		}
 	}
 }
 

buildSrc/src/main/java/org/springframework/gradle/github/changelog/GitHubChangelogPlugin.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2019-2020 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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.
+ */
+
+package org.springframework.gradle.github.changelog;
+
+import org.gradle.api.Action;
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.Task;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.artifacts.DependencySet;
+import org.gradle.api.artifacts.repositories.ExclusiveContentRepository;
+import org.gradle.api.artifacts.repositories.InclusiveRepositoryContentDescriptor;
+import org.gradle.api.artifacts.repositories.IvyArtifactRepository;
+import org.gradle.api.artifacts.repositories.IvyPatternRepositoryLayout;
+import org.gradle.api.tasks.JavaExec;
+
+import java.io.File;
+import java.nio.file.Paths;
+
+public class GitHubChangelogPlugin implements Plugin<Project> {
+
+	public static final String CHANGELOG_GENERATOR_CONFIGURATION_NAME = "changelogGenerator";
+
+	@Override
+	public void apply(Project project) {
+		createRepository(project);
+		createChangelogGeneratorConfiguration(project);
+		project.getTasks().register("generateChangelog", JavaExec.class, new Action<JavaExec>() {
+			@Override
+			public void execute(JavaExec generateChangelog) {
+				File outputFile = project.file(Paths.get(project.getBuildDir().getPath(), "changelog/release-notes.md"));
+				outputFile.getParentFile().mkdirs();
+				generateChangelog.setGroup("Release");
+				generateChangelog.setDescription("Generates the changelog");
+				generateChangelog.setWorkingDir(project.getRootDir());
+				generateChangelog.classpath(project.getConfigurations().getAt(CHANGELOG_GENERATOR_CONFIGURATION_NAME));
+				generateChangelog.doFirst(new Action<Task>() {
+					@Override
+					public void execute(Task task) {
+						generateChangelog.args("--spring.config.location=scripts/release/release-notes-sections.yml", project.property("nextVersion"), outputFile.toString());
+					}
+				});
+			}
+		});
+	}
+
+	private void createChangelogGeneratorConfiguration(Project project) {
+		project.getConfigurations().create(CHANGELOG_GENERATOR_CONFIGURATION_NAME, new Action<Configuration>() {
+			@Override
+			public void execute(Configuration configuration) {
+				configuration.defaultDependencies(new Action<DependencySet>() {
+					@Override
+					public void execute(DependencySet dependencies) {
+						dependencies.add(project.getDependencies().create("spring-io:github-changelog-generator:0.0.6"));
+					}
+				});
+			}
+		});
+	}
+
+	private void createRepository(Project project) {
+		IvyArtifactRepository repository = project.getRepositories().ivy(new Action<IvyArtifactRepository>() {
+			@Override
+			public void execute(IvyArtifactRepository repository) {
+				repository.setUrl("https://github.com/");
+				repository.patternLayout(new Action<IvyPatternRepositoryLayout>() {
+					@Override
+					public void execute(IvyPatternRepositoryLayout layout) {
+						layout.artifact("[organization]/[artifact]/releases/download/v[revision]/[artifact].[ext]");
+					}
+				});
+				repository.getMetadataSources().artifact();
+			}
+		});
+		project.getRepositories().exclusiveContent(new Action<ExclusiveContentRepository>() {
+			@Override
+			public void execute(ExclusiveContentRepository exclusiveContentRepository) {
+				exclusiveContentRepository.forRepositories(repository);
+				exclusiveContentRepository.filter(new Action<InclusiveRepositoryContentDescriptor>() {
+					@Override
+					public void execute(InclusiveRepositoryContentDescriptor descriptor) {
+						descriptor.includeGroup("spring-io");
+					}
+				});
+			}
+		});
+	}
+}