bbende commented on code in PR #8765: URL: https://github.com/apache/nifi/pull/8765#discussion_r1594087217
########## nifi-extension-bundles/nifi-github-bundle/nifi-github-extensions/src/main/java/org/apache/nifi/github/GitHubRepositoryClient.java: ########## @@ -0,0 +1,404 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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. + * + */ + +package org.apache.nifi.github; + +import org.apache.nifi.registry.flow.FlowRegistryException; +import org.kohsuke.github.GHCommit; +import org.kohsuke.github.GHContent; +import org.kohsuke.github.GHContentUpdateResponse; +import org.kohsuke.github.GHRef; +import org.kohsuke.github.GHRepository; +import org.kohsuke.github.GitHub; +import org.kohsuke.github.GitHubBuilder; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.FileNotFoundException; +import java.io.IOException; +import java.io.InputStream; +import java.util.List; +import java.util.Optional; +import java.util.Set; +import java.util.stream.Collectors; + +/** + * Client to encapsulate access to a GitHub Repository through the Hub4j GitHub client. + */ +public class GitHubRepositoryClient { + + private static final Logger LOGGER = LoggerFactory.getLogger(GitHubRepositoryClient.class); + + private static final String BRANCH_REF_PATTERN = "refs/heads/%s"; + private static final int COMMIT_PAGE_SIZE = 50; + + private final GHRepository repository; + private final String repoPath; + private final GitHubAuthenticationType authenticationType; + + private GitHubRepositoryClient(final Builder builder) throws IOException { + final GitHubBuilder gitHubBuilder = new GitHubBuilder().withEndpoint(builder.apiUrl); + + authenticationType = builder.authenticationType; + switch (authenticationType) { + case PERSONAL_ACCESS_TOKEN -> gitHubBuilder.withOAuthToken(builder.personalAccessToken); + case APP_INSTALLATION_TOKEN -> gitHubBuilder.withAppInstallationToken(builder.appInstallationToken); + } + + final GitHub gitHub = gitHubBuilder.build(); + try { + repository = gitHub.getRepository(builder.repoOwner + "/" + builder.repoName); + } catch (final IOException e) { + LOGGER.error("Unable to access GitHub repository [{}]", builder.repoName, e); + throw e; + } + repoPath = builder.repoPath; + } + + /** + * @return the authentication type this client is configured with + */ + public GitHubAuthenticationType getAuthenticationType() { + return authenticationType; + } + + /** + * Creates the content specified by the given builder. + * + * @param request the request for the content to create + * @return the update response + * + * @throws IOException if an I/O error happens calling GitHub + * @throws FlowRegistryException if a non I/O error happens calling GitHub + */ + public GHContentUpdateResponse createContent(final GitHubCreateContentRequest request) throws IOException, FlowRegistryException { + final String branch = request.getBranch(); + final String resolvedPath = getResolvedPath(request.getPath()); + LOGGER.debug("Creating content at path [{}] on branch [{}] in repo [{}] ", resolvedPath, branch, repository.getName()); + return execute(() -> { + try { + return repository.createContent() + .branch(branch) + .path(resolvedPath) + .content(request.getContent()) + .message(request.getMessage()) + .sha(request.getExistingContentSha()) + .commit(); + } catch (final FileNotFoundException fnf) { + throwPathOrBranchNotFound(resolvedPath, branch); + return null; + } + }); + } + + /** + * Gets the names of all the branches in the repo. + * + * @return the set of all branches in the repo + * + * @throws IOException if an I/O error happens calling GitHub + * @throws FlowRegistryException if a non I/O error happens calling GitHub + */ + public Set<String> getBranches() throws IOException, FlowRegistryException { + LOGGER.debug("Getting branches for repo [{}]", repository.getName()); + return execute(() -> repository.getBranches().keySet()); + } + + /** + * Gets an InputStream to read the latest content of the given path from the given branch. + * The returned stream already contains the contents of the requested file. + * + * @param path the path to the content + * @param branch the branch + * @return an input stream containing the contents of the path + * + * @throws IOException if an I/O error happens calling GitHub + * @throws FlowRegistryException if a non I/O error happens calling GitHub + */ + public InputStream getContentFromBranch(final String path, final String branch) throws IOException, FlowRegistryException { + final String resolvedPath = getResolvedPath(path); + final String branchRef = BRANCH_REF_PATTERN.formatted(branch); + LOGGER.debug("Getting content for [{}] from branch [{}] in repo [{}] ", resolvedPath, branch, repository.getName()); + + return execute(() -> { + try { + final GHContent ghContent = repository.getFileContent(resolvedPath, branchRef); + return ghContent.read(); + } catch (final FileNotFoundException e) { + throwPathOrBranchNotFound(resolvedPath, branchRef); + return null; + } + }); + } + + /** + * Gets the content of the given path from the given commit. + * The returned stream already contains the contents of the requested file. + * + * @param path the path to the content + * @param commitSha the commit SHA + * @return an input stream containing the contents of the path + * + * @throws IOException if an I/O error happens calling GitHub + * @throws FlowRegistryException if a non I/O error happens calling GitHub + */ + public InputStream getContentFromCommit(final String path, final String commitSha) throws IOException, FlowRegistryException { + final String resolvedPath = getResolvedPath(path); + LOGGER.debug("Getting content for [{}] from commit [{}] in repo [{}] ", resolvedPath, commitSha, repository.getName()); + + return execute(() -> { + try { + final GHContent ghContent = repository.getFileContent(resolvedPath, commitSha); + return ghContent.read(); + } catch (final FileNotFoundException fnf) { + throw new FlowRegistryException("Path [" + resolvedPath + "] or Commit [" + commitSha + "] not found"); + } + }); + } + + /** + * Gets the commits for a given path on a given branch. + * + * @param path the path + * @param branch the branch + * @return the list of commits for the given path + * + * @throws IOException if an I/O error happens calling GitHub + * @throws FlowRegistryException if a non I/O error happens calling GitHub + */ + public List<GHCommit> getCommits(final String path, final String branch) throws IOException, FlowRegistryException { + final String resolvedPath = getResolvedPath(path); + final String branchRef = BRANCH_REF_PATTERN.formatted(branch); + LOGGER.debug("Getting commits for [{}] from branch [{}] in repo [{}]", resolvedPath, branch, repository.getName()); + + return execute(() -> { + try { + final GHRef branchGhRef = repository.getRef(branchRef); + return repository.queryCommits() + .path(resolvedPath) + .from(branchGhRef.getObject().getSha()) + .pageSize(COMMIT_PAGE_SIZE) Review Comment: Yes the comments on `toList()` say: ``` Eagerly walk {@link Iterable} and return the result in a list. ``` So it will page through the results using page size and return all of them in a list. -- This is an automated message from the Apache Git Service. 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