CLI status should support --porcelain

Add support for the machine-readable output format along with the
existing default long format.

Bug: 419968
Change-Id: I37fe5121b4c9dbae1106b1d18e9fdc134070a9dd
Signed-off-by: Kaloyan Raev <kaloyan.r@zend.com>

2 files changed, 118 insertions, 8 deletions

diff --git a/org.eclipse.jgit.pgm/resources/org/eclipse/jgit/pgm/internal/CLIText.properties b/org.eclipse.jgit.pgm/resources/org/eclipse/jgit/pgm/internal/CLIText.properties
index fc83b956b9..d23f378993 100644
--- a/org.eclipse.jgit.pgm/resources/org/eclipse/jgit/pgm/internal/CLIText.properties
+++ b/org.eclipse.jgit.pgm/resources/org/eclipse/jgit/pgm/internal/CLIText.properties
@@ -282,6 +282,7 @@ usage_inputOutputFile=Input/output file
 usage_listBothRemoteTrackingAndLocalBranches=list both remote-tracking and local branches
 usage_listCreateOrDeleteBranches=List, create, or delete branches
 usage_logAllPretty=format:%H %ct %P' output=log --all '--pretty=format:%H %ct %P' output
+usage_machineReadableOutput=machine-readable output
 usage_manageReflogInformation=Manage reflog information
 usage_mergeFf=When the merge resolves as a fast-forward, only update the branch pointer, without creating a merge commit.
 usage_mergeNoFf=Create a merge commit even when the merge resolves as a fast-forward.
diff --git a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Status.java b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Status.java
index 0214ed00e0..2ae950bdc5 100644
--- a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Status.java
+++ b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Status.java
@@ -50,6 +50,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
+import java.util.TreeSet;
 
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.StatusCommand;
@@ -71,26 +72,134 @@ class Status extends TextBuiltin {
 
 	protected final String statusFileListFormatUnmerged = CLIText.get().statusFileListFormatUnmerged;
 
+	@Option(name = "--porcelain", usage = "usage_machineReadableOutput")
+	protected boolean porcelain;
+
 	@Option(name = "--", metaVar = "metaVar_path", multiValued = true)
 	protected List<String> filterPaths;
 
 	@Override
 	protected void run() throws Exception {
+		StatusCommand statusCommand = new Git(db).status();
+		if (filterPaths != null && filterPaths.size() > 0)
+			for (String path : filterPaths)
+				statusCommand.addPath(path);
+		org.eclipse.jgit.api.Status status = statusCommand.call();
+		printStatus(status);
+	}
+
+	private void printStatus(org.eclipse.jgit.api.Status status)
+			throws IOException {
+		if (porcelain)
+			printPorcelainStatus(status);
+		else
+			printLongStatus(status);
+	}
+
+	private void printPorcelainStatus(org.eclipse.jgit.api.Status status)
+			throws IOException {
+
+		Collection<String> added = status.getAdded();
+		Collection<String> changed = status.getChanged();
+		Collection<String> removed = status.getRemoved();
+		Collection<String> modified = status.getModified();
+		Collection<String> missing = status.getMissing();
+		Map<String, StageState> conflicting = status.getConflictingStageState();
+
+		// build a sorted list of all paths except untracked and ignored
+		TreeSet<String> sorted = new TreeSet<String>();
+		sorted.addAll(added);
+		sorted.addAll(changed);
+		sorted.addAll(removed);
+		sorted.addAll(modified);
+		sorted.addAll(missing);
+		sorted.addAll(conflicting.keySet());
+
+		// list each path
+		for (String path : sorted) {
+			char x = ' ';
+			char y = ' ';
+
+			if (added.contains(path))
+				x = 'A';
+			else if (changed.contains(path))
+				x = 'M';
+			else if (removed.contains(path))
+				x = 'D';
+
+			if (modified.contains(path))
+				y = 'M';
+			else if (missing.contains(path))
+				y = 'D';
+
+			if (conflicting.containsKey(path)) {
+				StageState stageState = conflicting.get(path);
+
+				switch (stageState) {
+				case BOTH_DELETED:
+					x = 'D';
+					y = 'D';
+					break;
+				case ADDED_BY_US:
+					x = 'A';
+					y = 'U';
+					break;
+				case DELETED_BY_THEM:
+					x = 'U';
+					y = 'D';
+					break;
+				case ADDED_BY_THEM:
+					x = 'U';
+					y = 'A';
+					break;
+				case DELETED_BY_US:
+					x = 'D';
+					y = 'U';
+					break;
+				case BOTH_ADDED:
+					x = 'A';
+					y = 'A';
+					break;
+				case BOTH_MODIFIED:
+					x = 'U';
+					y = 'U';
+					break;
+				default:
+					throw new IllegalArgumentException("Unknown StageState: " //$NON-NLS-1$
+							+ stageState);
+				}
+			}
+
+			printPorcelainLine(x, y, path);
+		}
+
+		// untracked are always at the end of the list
+		TreeSet<String> untracked = new TreeSet<String>(status.getUntracked());
+		for (String path : untracked)
+			printPorcelainLine('?', '?', path);
+	}
+
+	private void printPorcelainLine(char x, char y, String path)
+			throws IOException {
+		StringBuilder lineBuilder = new StringBuilder();
+		lineBuilder.append(x).append(y).append(' ').append(path);
+		outw.println(lineBuilder.toString());
+	}
+
+	private void printLongStatus(org.eclipse.jgit.api.Status status)
+			throws IOException {
 		// Print current branch name
 		final Ref head = db.getRef(Constants.HEAD);
-		boolean firstHeader = true;
 		if (head != null && head.isSymbolic()) {
 			String branch = Repository.shortenRefName(head.getLeaf().getName());
-			outw.println(CLIText.formatLine(
-					MessageFormat.format(CLIText.get().onBranch, branch)));
+			outw.println(CLIText.formatLine(MessageFormat.format(
+					CLIText.get().onBranch, branch)));
 		} else
 			outw.println(CLIText.formatLine(CLIText.get().notOnAnyBranch));
+
 		// List changes
-		StatusCommand statusCommand = new Git(db).status();
-		if (filterPaths != null && filterPaths.size() > 0)
-			for (String path : filterPaths)
-				statusCommand.addPath(path);
-		org.eclipse.jgit.api.Status status = statusCommand.call();
+		boolean firstHeader = true;
+
 		Collection<String> added = status.getAdded();
 		Collection<String> changed = status.getChanged();
 		Collection<String> removed = status.getRemoved();