fix author parsing

Author: vladak

opengrok-indexer/src/main/java/org/opengrok/indexer/history/Annotation.java

@@ -91,6 +91,14 @@ public Set<String> getRevisions() {
         return ret;
     }
 
+    Set<String> getAuthors() {
+        Set<String> ret = new HashSet<>();
+        for (Line ln : this.lines) {
+            ret.add(ln.author);
+        }
+        return ret;
+    }
+
     /**
      * Gets the author who last modified the specified line.
      *

opengrok-indexer/src/main/java/org/opengrok/indexer/history/SCCSRepository.java

@@ -100,8 +100,7 @@ private Map<String, String> getAuthors(File file) throws IOException {
         argv.add(RepoCommand);
         argv.add("prs");
         argv.add("-e");
-        argv.add("-d");
-        argv.add(":I: :P:");
+        argv.add("-d:I: :P:");
         argv.add(file.getCanonicalPath());
 
         Executor executor = new Executor(argv, file.getCanonicalFile().getParentFile(),

opengrok-indexer/src/main/java/org/opengrok/indexer/history/SCCSRepositoryAuthorParser.java

@@ -18,7 +18,7 @@
  */
 
 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
  */
 package org.opengrok.indexer.history;
 
@@ -46,8 +46,7 @@ public class SCCSRepositoryAuthorParser implements Executor.StreamHandler {
     /**
      * Pattern used to extract revision from the {@code sccs get} command.
      */
-    private static final Pattern AUTHOR_PATTERN
-            = Pattern.compile("^([\\d.]+)\\s+(\\S+)");
+    private static final Pattern AUTHOR_PATTERN = Pattern.compile("^([\\d.]+)\\s+(\\S+)");
 
     @Override
     public void processStream(InputStream input) throws IOException {

opengrok-indexer/src/test/java/org/opengrok/indexer/history/SCCSRepositoryTest.java

@@ -127,6 +127,7 @@ void testAnnotation() throws Exception {
         assertNotNull(annotation);
         Set<String> revSet = Set.of("1.2", "1.1");
         assertEquals(revSet, annotation.getRevisions());
+        assertEquals(Set.of("trond"), annotation.getAuthors());
     }
 
     @Test