Do not exclude ".gitignore" and ".cvsignore" by default (#326)

This closes #312

Author: kwin

src/main/java/org/codehaus/plexus/util/AbstractScanner.java

@@ -29,7 +29,7 @@ public abstract class AbstractScanner implements Scanner {
      * Patterns which should be excluded by default, like SCM files
      * <ul>
      * <li>Misc: &#42;&#42;/&#42;~, &#42;&#42;/#&#42;#, &#42;&#42;/.#&#42;, &#42;&#42;/%&#42;%, &#42;&#42;/._&#42;</li>
-     * <li>CVS: &#42;&#42;/CVS, &#42;&#42;/CVS/&#42;&#42;, &#42;&#42;/.cvsignore</li>
+     * <li>CVS: &#42;&#42;/CVS, &#42;&#42;/CVS/&#42;&#42;</li>
      * <li>RCS: &#42;&#42;/RCS, &#42;&#42;/RCS/&#42;&#42;</li>
      * <li>SCCS: &#42;&#42;/SCCS, &#42;&#42;/SCCS/&#42;&#42;</li>
      * <li>VSSercer: &#42;&#42;/vssver.scc</li>
@@ -61,7 +61,6 @@ public abstract class AbstractScanner implements Scanner {
         // CVS
         "**/CVS",
         "**/CVS/**",
-        "**/.cvsignore",
 
         // RCS
         "**/RCS",

src/test/java/org/codehaus/plexus/util/DirectoryScannerTest.java

@@ -541,6 +541,20 @@ void isParentSymbolicLink() throws Exception {
                 ds.isParentSymbolicLink(new File(directory, "symLinkToDirOnTheOutside"), "FileInDirOnTheOutside.txt"));
     }
 
+    @Test
+    void defaultExcludes() throws Exception {
+        DirectoryScanner ds = new DirectoryScanner();
+        // work in src directory as target has filtering already applied with outdated default excludes
+        // (https://maven.apache.org/plugins/maven-resources-plugin/resources-mojo.html#addDefaultExcludes)
+        ds.setBasedir(new File("src/test/resources/directory-scanner-default-excludes").getCanonicalFile());
+
+        ds.addDefaultExcludes();
+        ds.scan();
+
+        assertInclusionsAndExclusions(
+                ds.getIncludedFiles(), new String[] {}, ".gitignore", ".gitattributes", ".cvsignore");
+    }
+
     private void printTestHeader() {
         StackTraceElement ste = new Throwable().getStackTrace()[1];
         System.out.println("Test: " + ste.getMethodName());

src/test/resources/directory-scanner-default-excludes/.cvsignore

@@ -0,0 +1 @@
+# must not be excluded, otherwise the project will not work

src/test/resources/directory-scanner-default-excludes/.gitattributes

@@ -0,0 +1 @@
+# must not be excluded

src/test/resources/directory-scanner-default-excludes/.gitignore

@@ -0,0 +1 @@
+# must not be excluded