Merge branch 'stable-5.6'

* stable-5.6:
  Add ability to redirect stderr from git hooks
  Add possibility to get pure stderr output from AbortedByHookException

Change-Id: Ifc02675542dad6ced25fdd8b9fae80b5736db688
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/BuiltinLFS.java

 		return null;
 	}
 
+	@Override
+	@Nullable
+	public PrePushHook getPrePushHook(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
+		if (isEnabled(repo)) {
+			return new LfsPrePushHook(repo, outputStream, errorStream);
+		}
+		return null;
+	}
+
 	/**
 	 * @param db
 	 *            the repository

org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/LfsPrePushHook.java

 		super(repo, outputStream);
 	}
 
+	/**
+	 * @param repo
+	 *            the repository
+	 * @param outputStream
+	 *            not used by this implementation
+	 * @param errorStream
+	 *            not used by this implementation
+	 * @since 5.6
+	 */
+	public LfsPrePushHook(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
+		super(repo, outputStream, errorStream);
+	}
+
 	@Override
 	public void setRefs(Collection<RemoteRefUpdate> toRefs) {
 		this.refs = toRefs;

org.eclipse.jgit/META-INF/MANIFEST.MF

  org.bouncycastle.openpgp.operator;version="[1.61.0,2.0.0)",
  org.bouncycastle.openpgp.operator.jcajce;version="[1.61.0,2.0.0)",
  org.bouncycastle.util.encoders;version="[1.61.0,2.0.0)",
+ org.bouncycastle.util.io;version="[1.61.0,2.0.0)",
  org.slf4j;version="[1.7.0,2.0.0)",
  org.xml.sax,
  org.xml.sax.helpers

org.eclipse.jgit/src/org/eclipse/jgit/api/CommitCommand.java

 
 	private HashMap<String, PrintStream> hookOutRedirect = new HashMap<>(3);
 
+	private HashMap<String, PrintStream> hookErrRedirect = new HashMap<>(3);
+
 	private Boolean allowEmpty;
 
 	private Boolean signCommit;
 						state.name()));
 
 			if (!noVerify) {
-				Hooks.preCommit(repo, hookOutRedirect.get(PreCommitHook.NAME))
+				Hooks.preCommit(repo, hookOutRedirect.get(PreCommitHook.NAME),
+						hookErrRedirect.get(PreCommitHook.NAME))
 						.call();
 			}
 
 			if (!noVerify) {
 				message = Hooks
 						.commitMsg(repo,
-								hookOutRedirect.get(CommitMsgHook.NAME))
+								hookOutRedirect.get(CommitMsgHook.NAME),
+								hookErrRedirect.get(CommitMsgHook.NAME))
 						.setCommitMessage(message).call();
 			}
 
 						repo.writeRevertHead(null);
 					}
 					Hooks.postCommit(repo,
-							hookOutRedirect.get(PostCommitHook.NAME)).call();
+							hookOutRedirect.get(PostCommitHook.NAME),
+							hookErrRedirect.get(PostCommitHook.NAME)).call();
 
 					return revCommit;
 				}
 		return this;
 	}
 
+	/**
+	 * Set the error stream for all hook scripts executed by this command
+	 * (pre-commit, commit-msg, post-commit). If not set it defaults to
+	 * {@code System.err}.
+	 *
+	 * @param hookStdErr
+	 *            the error stream for hook scripts executed by this command
+	 * @return {@code this}
+	 * @since 5.6
+	 */
+	public CommitCommand setHookErrorStream(PrintStream hookStdErr) {
+		setHookErrorStream(PreCommitHook.NAME, hookStdErr);
+		setHookErrorStream(CommitMsgHook.NAME, hookStdErr);
+		setHookErrorStream(PostCommitHook.NAME, hookStdErr);
+		return this;
+	}
+
 	/**
 	 * Set the output stream for a selected hook script executed by this command
 	 * (pre-commit, commit-msg, post-commit). If not set it defaults to
 		return this;
 	}
 
+	/**
+	 * Set the error stream for a selected hook script executed by this command
+	 * (pre-commit, commit-msg, post-commit). If not set it defaults to
+	 * {@code System.err}.
+	 *
+	 * @param hookName
+	 *            name of the hook to set the output stream for
+	 * @param hookStdErr
+	 *            the output stream to use for the selected hook
+	 * @return {@code this}
+	 * @since 5.6
+	 */
+	public CommitCommand setHookErrorStream(String hookName,
+			PrintStream hookStdErr) {
+		if (!(PreCommitHook.NAME.equals(hookName)
+				|| CommitMsgHook.NAME.equals(hookName)
+				|| PostCommitHook.NAME.equals(hookName))) {
+			throw new IllegalArgumentException(MessageFormat
+					.format(JGitText.get().illegalHookName, hookName));
+		}
+		hookErrRedirect.put(hookName, hookStdErr);
+		return this;
+	}
+
 	/**
 	 * Sets the signing key
 	 * <p>

org.eclipse.jgit/src/org/eclipse/jgit/api/errors/AbortedByHookException.java

 	 */
 	private final int returnCode;
 
+	/**
+	 * The stderr output of the hook.
+	 */
+	private final String hookStdErr;
+
 	/**
 	 * Constructor for AbortedByHookException
 	 *
-	 * @param message
-	 *            The error details.
+	 * @param hookStdErr
+	 *            The error details from the stderr output of the hook
 	 * @param hookName
 	 *            The name of the hook that interrupted the command, must not be
 	 *            null.
 	 * @param returnCode
 	 *            The return code of the hook process that has been run.
 	 */
-	public AbortedByHookException(String message, String hookName,
+	public AbortedByHookException(String hookStdErr, String hookName,
 			int returnCode) {
-		super(message);
+		super(MessageFormat.format(JGitText.get().commandRejectedByHook,
+				hookName, hookStdErr));
+		this.hookStdErr = hookStdErr;
 		this.hookName = hookName;
 		this.returnCode = returnCode;
 	}
 		return returnCode;
 	}
 
-	/** {@inheritDoc} */
-	@Override
-	public String getMessage() {
-		return MessageFormat.format(JGitText.get().commandRejectedByHook,
-				hookName, super.getMessage());
+	/**
+	 * Get the stderr output of the hook.
+	 *
+	 * @return A string containing the complete stderr output of the hook.
+	 * @since 5.6
+	 */
+	public String getHookStdErr() {
+		return hookStdErr;
 	}
 }

org.eclipse.jgit/src/org/eclipse/jgit/hooks/CommitMsgHook.java

 
 	/**
 	 * Constructor for CommitMsgHook
+	 * <p>
+	 * This constructor will use the default error stream.
+	 * </p>
 	 *
 	 * @param repo
 	 *            The repository
 		super(repo, outputStream);
 	}
 
+	/**
+	 * Constructor for CommitMsgHook
+	 *
+	 * @param repo
+	 *            The repository
+	 * @param outputStream
+	 *            The output stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.out}.
+	 * @param errorStream
+	 *            The error stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.err}.
+	 * @since 5.6
+	 */
+	protected CommitMsgHook(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
+		super(repo, outputStream, errorStream);
+	}
+
 	/** {@inheritDoc} */
 	@Override
 	public String call() throws IOException, AbortedByHookException {

org.eclipse.jgit/src/org/eclipse/jgit/hooks/GitHook.java

 import java.io.UnsupportedEncodingException;
 import java.util.concurrent.Callable;
 
+import org.bouncycastle.util.io.TeeOutputStream;
 import org.eclipse.jgit.api.errors.AbortedByHookException;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.util.FS;
 	protected final PrintStream outputStream;
 
 	/**
-	 * Constructor for GitHook
+	 * The error stream to be used by the hook.
+	 */
+	protected final PrintStream errorStream;
+
+	/**
+	 * Constructor for GitHook.
+	 * <p>
+	 * This constructor will use stderr for the error stream.
+	 * </p>
 	 *
 	 * @param repo
 	 *            a {@link org.eclipse.jgit.lib.Repository} object.
 	 *            in which case the hook will use {@code System.out}.
 	 */
 	protected GitHook(Repository repo, PrintStream outputStream) {
+		this(repo, outputStream, null);
+	}
+
+	/**
+	 * Constructor for GitHook
+	 *
+	 * @param repo
+	 *            a {@link org.eclipse.jgit.lib.Repository} object.
+	 * @param outputStream
+	 *            The output stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.out}.
+	 * @param errorStream
+	 *            The error stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.err}.
+	 */
+	protected GitHook(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
 		this.repo = repo;
 		this.outputStream = outputStream;
+		this.errorStream = errorStream;
 	}
 
 	/**
 		return outputStream == null ? System.out : outputStream;
 	}
 
+	/**
+	 * Get error stream
+	 *
+	 * @return The error stream the hook must use. Never {@code null},
+	 *         {@code System.err} is returned by default.
+	 */
+	protected PrintStream getErrorStream() {
+		return errorStream == null ? System.err : errorStream;
+	}
+
 	/**
 	 * Runs the hook, without performing any validity checks.
 	 *
 	 */
 	protected void doRun() throws AbortedByHookException {
 		final ByteArrayOutputStream errorByteArray = new ByteArrayOutputStream();
+		final TeeOutputStream stderrStream = new TeeOutputStream(errorByteArray,
+				getErrorStream());
 		PrintStream hookErrRedirect = null;
 		try {
-			hookErrRedirect = new PrintStream(errorByteArray, false,
+			hookErrRedirect = new PrintStream(stderrStream, false,
 					UTF_8.name());
 		} catch (UnsupportedEncodingException e) {
 			// UTF-8 is guaranteed to be available

org.eclipse.jgit/src/org/eclipse/jgit/hooks/Hooks.java

 public class Hooks {
 
 	/**
-	 * Create pre-commit hook for the given repository
+	 * Create pre-commit hook for the given repository with the default error
+	 * stream
 	 *
 	 * @param repo
 	 *            a {@link org.eclipse.jgit.lib.Repository} object.
 	}
 
 	/**
-	 * Create post-commit hook for the given repository
+	 * Create pre-commit hook for the given repository
+	 *
+	 * @param repo
+	 *            a {@link org.eclipse.jgit.lib.Repository} object.
+	 * @param outputStream
+	 *            The output stream, or {@code null} to use {@code System.out}
+	 * @param errorStream
+	 *            The error stream, or {@code null} to use {@code System.err}
+	 * @return The pre-commit hook for the given repository.
+	 * @since 5.6
+	 */
+	public static PreCommitHook preCommit(Repository repo,
+			PrintStream outputStream, PrintStream errorStream) {
+		return new PreCommitHook(repo, outputStream, errorStream);
+	}
+
+	/**
+	 * Create post-commit hook for the given repository with the default error
+	 * stream
 	 *
 	 * @param repo
 	 *            a {@link org.eclipse.jgit.lib.Repository} object.
 	}
 
 	/**
-	 * Create commit-msg hook for the given repository
+	 * Create post-commit hook for the given repository
+	 *
+	 * @param repo
+	 *            a {@link org.eclipse.jgit.lib.Repository} object.
+	 * @param outputStream
+	 *            The output stream, or {@code null} to use {@code System.out}
+	 * @param errorStream
+	 *            The error stream, or {@code null} to use {@code System.err}
+	 * @return The pre-commit hook for the given repository.
+	 * @since 5.6
+	 */
+	public static PostCommitHook postCommit(Repository repo,
+			PrintStream outputStream, PrintStream errorStream) {
+		return new PostCommitHook(repo, outputStream, errorStream);
+	}
+
+	/**
+	 * Create commit-msg hook for the given repository with the default error
+	 * stream
 	 *
 	 * @param repo
 	 *            a {@link org.eclipse.jgit.lib.Repository} object.
 	}
 
 	/**
-	 * Create pre-push hook for the given repository
+	 * Create commit-msg hook for the given repository
+	 *
+	 * @param repo
+	 *            a {@link org.eclipse.jgit.lib.Repository} object.
+	 * @param outputStream
+	 *            The output stream, or {@code null} to use {@code System.out}
+	 * @param errorStream
+	 *            The error stream, or {@code null} to use {@code System.err}
+	 * @return The pre-commit hook for the given repository.
+	 * @since 5.6
+	 */
+	public static CommitMsgHook commitMsg(Repository repo,
+			PrintStream outputStream, PrintStream errorStream) {
+		return new CommitMsgHook(repo, outputStream, errorStream);
+	}
+
+	/**
+	 * Create pre-push hook for the given repository with the default error
+	 * stream
 	 *
 	 * @param repo
 	 *            a {@link org.eclipse.jgit.lib.Repository} object.
 		}
 		return new PrePushHook(repo, outputStream);
 	}
+
+	/**
+	 * Create pre-push hook for the given repository
+	 *
+	 * @param repo
+	 *            a {@link org.eclipse.jgit.lib.Repository} object.
+	 * @param outputStream
+	 *            The output stream, or {@code null} to use {@code System.out}
+	 * @param errorStream
+	 *            The error stream, or {@code null} to use {@code System.err}
+	 * @return The pre-push hook for the given repository.
+	 * @since 5.6
+	 */
+	public static PrePushHook prePush(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
+		if (LfsFactory.getInstance().isAvailable()) {
+			PrePushHook hook = LfsFactory.getInstance().getPrePushHook(repo,
+					outputStream, errorStream);
+			if (hook != null) {
+				if (hook.isNativeHookPresent()) {
+					PrintStream ps = outputStream;
+					if (ps == null) {
+						ps = System.out;
+					}
+					ps.println(MessageFormat
+							.format(JGitText.get().lfsHookConflict, repo));
+				}
+				return hook;
+			}
+		}
+		return new PrePushHook(repo, outputStream, errorStream);
+	}
 }

org.eclipse.jgit/src/org/eclipse/jgit/hooks/PostCommitHook.java

 
 	/**
 	 * Constructor for PostCommitHook
+	 * <p>
+	 * This constructor will use the default error stream.
+	 * </p>
 	 *
 	 * @param repo
 	 *            The repository
 		super(repo, outputStream);
 	}
 
+	/**
+	 * Constructor for PostCommitHook
+	 *
+	 * @param repo
+	 *            The repository
+	 * @param outputStream
+	 *            The output stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.out}.
+	 * @param errorStream
+	 *            The error stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.err}.
+	 * @since 5.6
+	 */
+	protected PostCommitHook(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
+		super(repo, outputStream, errorStream);
+	}
+
 	/** {@inheritDoc} */
 	@Override
 	public Void call() throws IOException, AbortedByHookException {

org.eclipse.jgit/src/org/eclipse/jgit/hooks/PreCommitHook.java

 
 	/**
 	 * Constructor for PreCommitHook
+	 * <p>
+	 * This constructor will use the default error stream.
+	 * </p>
 	 *
 	 * @param repo
 	 *            The repository
 		super(repo, outputStream);
 	}
 
+	/**
+	 * Constructor for PreCommitHook
+	 *
+	 * @param repo
+	 *            The repository
+	 * @param outputStream
+	 *            The output stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.out}.
+	 * @param errorStream
+	 *            The error stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.err}.
+	 * @since 5.6
+	 */
+	protected PreCommitHook(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
+		super(repo, outputStream, errorStream);
+	}
+
 	/** {@inheritDoc} */
 	@Override
 	public Void call() throws IOException, AbortedByHookException {

org.eclipse.jgit/src/org/eclipse/jgit/hooks/PrePushHook.java

 
 	/**
 	 * Constructor for PrePushHook
+	 * <p>
+	 * This constructor will use the default error stream.
+	 * </p>
 	 *
 	 * @param repo
 	 *            The repository
 		super(repo, outputStream);
 	}
 
+	/**
+	 * Constructor for PrePushHook
+	 *
+	 * @param repo
+	 *            The repository
+	 * @param outputStream
+	 *            The output stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.out}.
+	 * @param errorStream
+	 *            The error stream the hook must use. {@code null} is allowed,
+	 *            in which case the hook will use {@code System.err}.
+	 * @since 5.6
+	 */
+	protected PrePushHook(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
+		super(repo, outputStream, errorStream);
+	}
+
 	/** {@inheritDoc} */
 	@Override
 	protected String getStdinArgs() {

org.eclipse.jgit/src/org/eclipse/jgit/util/LfsFactory.java

 	}
 
 	/**
-	 * Retrieve a pre-push hook to be applied.
+	 * Retrieve a pre-push hook to be applied using the default error stream.
 	 *
 	 * @param repo
 	 *            the {@link Repository} the hook is applied to.
 		return null;
 	}
 
+	/**
+	 * Retrieve a pre-push hook to be applied.
+	 *
+	 * @param repo
+	 *            the {@link Repository} the hook is applied to.
+	 * @param outputStream
+	 * @param errorStream
+	 * @return a {@link PrePushHook} implementation or <code>null</code>
+	 * @since 5.6
+	 */
+	@Nullable
+	public PrePushHook getPrePushHook(Repository repo, PrintStream outputStream,
+			PrintStream errorStream) {
+		return getPrePushHook(repo, outputStream);
+	}
+
 	/**
 	 * Retrieve an {@link LfsInstallCommand} which can be used to enable LFS
 	 * support (if available) either per repository or for the user.