git: simplify the rebase line listener: used only for progress now

It fixes IDEA-194024 which was introduced by 116c1b6: when editor is cancelled, Git produces an error messages (which made the Status to be ERROR), but it is not a fatal error, and it is followed by a message about "stopped for editing". Receiving two status messages was unexpected by the GitRebaseLineListener.

plugins/git4idea/src/git4idea/rebase/GitRebaseLineListener.java

@@ -26,60 +26,18 @@ import java.util.regex.Pattern;
  * This listener gathers information relevant to the progress of the rebase operation
  */
 public class GitRebaseLineListener extends GitLineHandlerAdapter {
-  /**
-   * Git rebase progress message
-   */
   private static final Pattern PROGRESS = Pattern.compile("^Rebasing \\((\\d+)/(\\d+)\\)$");
-  /**
-   * The status
-   */
-  private Status myStatus;
-  /**
-   * The progress line
-   */
   private String myProgressLine;
 
-  /**
-   * {@inheritDoc}
-   */
   @Override
   public synchronized void onLineAvailable(String line, Key outputType) {
     if (outputType == ProcessOutputTypes.STDOUT) {
       if (PROGRESS.matcher(line).matches()) {
         myProgressLine = line;
-        // a bit dodgy line since STDERR line could arrive before STDOUT line,
-        // but in practice STDOUT comes first.
-        myStatus = null;
-      }
-    }
-    else {
-      if (line.startsWith("You can amend the commit now")) {
-        assert myStatus == null;
-        myStatus = Status.EDIT;
-      }
-      else if (line.startsWith("Successfully rebased and updated")) {
-        assert myStatus == null;
-        myStatus = Status.FINISHED;
-      }
-      else if (line.startsWith("Automatic cherry-pick failed") || line.startsWith("When you have resolved this problem")) {
-        assert myStatus == null || myStatus == Status.ERROR;
-        myStatus = Status.CONFLICT;
-      }
-      else if (line.startsWith("Could not execute editor")) {
-        assert myStatus == null;
-        myStatus = myProgressLine == null ? Status.CANCELLED : Status.ERROR;
-      }
-      else if (line.startsWith("fatal") || line.startsWith("error: ") || line.startsWith("Cannot")) {
-        if (myStatus != Status.CONFLICT) {
-          myStatus = Status.ERROR;
-        }
       }
     }
   }
 
-  /**
-   * @return the progress values as a pair
-   */
   public synchronized Result getResult() {
     int total;
     int current;
@@ -97,17 +55,10 @@ public class GitRebaseLineListener extends GitLineHandlerAdapter {
     else {
       total = current = 0;
     }
-    return new Result(myStatus == null ? Status.FINISHED : myStatus, total, current);
+    return new Result(total, current);
   }
 
-  /**
-   * The result of operation
-   */
   public static final class Result {
-    /**
-     * The operation status
-     */
-    public final Status status;
     /**
      * The total number of commits
      */
@@ -117,43 +68,9 @@ public class GitRebaseLineListener extends GitLineHandlerAdapter {
      */
     public final int current;
 
-    /**
-     * A constructor
-     *
-     * @param status  the status
-     * @param total   the commit count
-     * @param current the current commit
-     */
-    public Result(Status status, int total, int current) {
-      this.status = status;
+    public Result(int total, int current) {
       this.total = total;
       this.current = current;
     }
   }
-
-  /**
-   * The current rebase status
-   */
-  public enum Status {
-    /**
-     * Rebase operation is cancelled (could not execute editor)
-     */
-    CANCELLED,
-    /**
-     * Rebase is finished
-     */
-    FINISHED,
-    /**
-     * Suspended for edit
-     */
-    EDIT,
-    /**
-     * Suspended due to the conflict
-     */
-    CONFLICT,
-    /**
-     * Suspended due to the error
-     */
-    ERROR
-  }
 }