Git Integration

Author: baydindima

app/lib/org.eclipse.jgit-4.3.0.201604071810-r.jar

@@ -0,0 +1,115 @@
+package processing.app.git;
+
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.errors.GitAPIException;
+import org.eclipse.jgit.api.errors.NoHeadException;
+import org.eclipse.jgit.errors.RepositoryNotFoundException;
+import org.eclipse.jgit.lib.Repository;
+import org.eclipse.jgit.revwalk.RevCommit;
+import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.function.Consumer;
+
+
+public class GitManager {
+
+  public void init(File repoDir) {
+    try (Git git = Git.init().setDirectory(repoDir).call()) {
+      System.out.println("Having repository: " + git.getRepository().getDirectory());
+    } catch (GitAPIException e) {
+      e.printStackTrace();
+    }
+  }
+
+  public void commit(File repoDir, String message) {
+    if (!commitMessageIsValid(message)) {
+      System.err.println("Commit message isn't valid.");
+      return;
+    }
+
+    File[] files = repoDir.listFiles();
+
+    Consumer<Git> commitCommand = git -> {
+      try {
+        addFiles(files, git);
+        commit(message, git);
+        System.out.printf("Committed file to repository at: %s%n", git.getRepository().getDirectory());
+      } catch (GitAPIException e) {
+        e.printStackTrace();
+      }
+    };
+
+    runGitCommand(repoDir, commitCommand);
+  }
+
+  public void log(File repoDir) {
+
+    Consumer<Git> logCommand = git -> {
+      try {
+        Iterable<RevCommit> logs = git.log()
+          .call();
+
+        int count = 0;
+        for (RevCommit rev : logs) {
+          System.out.printf("Commit: %s, name: %s%n", rev, rev.getName());
+          count++;
+        }
+
+        System.out.printf("Had %d commits overall on current branch%n", count);
+
+      } catch (NoHeadException e) {
+        System.err.printf("Repository %s is empty. Try to commit something.%n", git.getRepository().getDirectory());
+      } catch (GitAPIException e) {
+        e.printStackTrace();
+      }
+    };
+
+    runGitCommand(repoDir, logCommand);
+  }
+
+  private boolean commitMessageIsValid(String message) {
+    return !message.trim().isEmpty();
+  }
+
+  private void addFiles(File[] files, Git git) throws GitAPIException {
+    for (File file : files) {
+      git.add()
+        .addFilepattern(file.getName())
+        .call();
+    }
+  }
+
+  private void commit(String message, Git git) throws GitAPIException {
+    git.commit()
+      .setMessage(message)
+      .call();
+  }
+
+  private void runGitCommand(File repoDir, Consumer<Git> command) {
+    File gitDir = new File(repoDir, ".git");
+    if (gitDir.exists()) {
+      repoDir = gitDir;
+    }
+
+    FileRepositoryBuilder builder = new FileRepositoryBuilder();
+    try (Repository repository = builder.setGitDir(repoDir)
+      .readEnvironment() // scan environment GIT_* variables
+      .findGitDir(repoDir) // scan up the file system tree
+      .setMustExist(true)
+      .build()) {
+
+      try (Git git = new Git(repository)) {
+        command.accept(git);
+      }
+
+    } catch (RepositoryNotFoundException e) {
+      System.err.printf("Repository not found: %s. Try create git repository.%n", repoDir);
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+
+  }
+
+}