Stop using Bintray to publish to Maven Central

This commit reworks the CI pipeline to remove the use of Bintray for
publishing to Maven Central. In its place it adds a new
publishToCentral command to the release scripts. This command can be
used to publish a directory tree of artifacts to the Maven Central
gateway hosted by Sonatype.

Publishing consists of 4 steps:

1. Create the staging repository
2. Deploy artifacts to the repository
3. Close the repository
4. Release the repository

The command requires 3 arguments:

1. The type of release being performed
2. Location of a build info JSON file that describes the release
   that is to be deployed
3. Root of a directory structure, in Maven repository layout, that
   contains the artifacts to be deployed

Closes gh-7
See spring-projects/spring-boot#25107

Author: wilkinsona

build.gradle

@@ -28,6 +28,7 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-json'
 	implementation 'org.springframework:spring-web'
     implementation 'org.awaitility:awaitility'
+	implementation 'org.bouncycastle:bcpg-jdk15to18:1.68'
 	annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'
 	testImplementation('org.springframework.boot:spring-boot-starter-test') {
 		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'

src/main/java/io/spring/concourse/releasescripts/artifactory/ArtifactoryService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -17,14 +17,10 @@
 package io.spring.concourse.releasescripts.artifactory;
 
 import java.net.URI;
-import java.time.Duration;
-import java.util.Set;
 
 import io.spring.concourse.releasescripts.ReleaseInfo;
 import io.spring.concourse.releasescripts.artifactory.payload.BuildInfoResponse;
-import io.spring.concourse.releasescripts.artifactory.payload.DistributionRequest;
 import io.spring.concourse.releasescripts.artifactory.payload.PromotionRequest;
-import io.spring.concourse.releasescripts.bintray.BintrayService;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -53,17 +49,11 @@ public class ArtifactoryService {
 
 	private static final String BUILD_INFO_URL = ARTIFACTORY_URL + "/api/build/";
 
-	private static final String DISTRIBUTION_URL = ARTIFACTORY_URL + "/api/build/distribute/";
-
 	private static final String STAGING_REPO = "libs-staging-local";
 
 	private final RestTemplate restTemplate;
 
-	private final BintrayService bintrayService;
-
-	public ArtifactoryService(RestTemplateBuilder builder, ArtifactoryProperties artifactoryProperties,
-			BintrayService bintrayService) {
-		this.bintrayService = bintrayService;
+	public ArtifactoryService(RestTemplateBuilder builder, ArtifactoryProperties artifactoryProperties) {
 		String username = artifactoryProperties.getUsername();
 		String password = artifactoryProperties.getPassword();
 		if (StringUtils.hasLength(username)) {
@@ -107,7 +97,7 @@ private boolean isAlreadyPromoted(String buildName, String buildNumber, String t
 			ResponseEntity<BuildInfoResponse> entity = this.restTemplate
 					.getForEntity(BUILD_INFO_URL + buildName + "/" + buildNumber, BuildInfoResponse.class);
 			BuildInfoResponse.Status status = entity.getBody().getBuildInfo().getStatuses()[0];
-			logger.debug("Reutned repository " + status.getRepository() + " expecting " + targetRepo);
+			logger.debug("Returned repository " + status.getRepository() + " expecting " + targetRepo);
 			return status.getRepository().equals(targetRepo);
 		}
 		catch (HttpClientErrorException ex) {
@@ -116,37 +106,6 @@ private boolean isAlreadyPromoted(String buildName, String buildNumber, String t
 		}
 	}
 
-	/**
-	 * Deploy builds from Artifactory to Bintray.
-	 * @param sourceRepo the source repo in Artifactory.
-	 * @param releaseInfo the resease info
-	 * @param artifactDigests the artifact digests
-	 */
-	public void distribute(String sourceRepo, ReleaseInfo releaseInfo, Set<String> artifactDigests) {
-		logger.debug("Attempting distribute via Artifactory");
-		if (!this.bintrayService.isDistributionStarted(releaseInfo)) {
-			startDistribute(sourceRepo, releaseInfo);
-		}
-		if (!this.bintrayService.isDistributionComplete(releaseInfo, artifactDigests, Duration.ofMinutes(60))) {
-			throw new DistributionTimeoutException("Distribution timed out.");
-		}
-	}
-
-	private void startDistribute(String sourceRepo, ReleaseInfo releaseInfo) {
-		DistributionRequest request = new DistributionRequest(new String[] { sourceRepo });
-		RequestEntity<DistributionRequest> requestEntity = RequestEntity
-				.post(URI.create(DISTRIBUTION_URL + releaseInfo.getBuildName() + "/" + releaseInfo.getBuildNumber()))
-				.contentType(MediaType.APPLICATION_JSON).body(request);
-		try {
-			this.restTemplate.exchange(requestEntity, Object.class);
-			logger.debug("Distribute call completed");
-		}
-		catch (HttpClientErrorException ex) {
-			logger.info("Failed to distribute.");
-			throw ex;
-		}
-	}
-
 	private PromotionRequest getPromotionRequest(String targetRepo) {
 		return new PromotionRequest("staged", STAGING_REPO, targetRepo);
 	}

src/main/java/io/spring/concourse/releasescripts/artifactory/payload/BuildInfoResponse.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.