Fix #143: Add ability to override a default exclusion to include a pattern from the latter

license-maven-plugin/src/main/java/com/mycila/maven/plugin/license/util/Selection.java

@@ -20,8 +20,10 @@
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
+import static java.util.Arrays.*;
 import static java.util.Arrays.asList;
 
 /**
@@ -38,8 +40,9 @@ public final class Selection {
 
     public Selection(File basedir, String[] included, String[] excluded, boolean useDefaultExcludes) {
         this.basedir = basedir;
-        this.included = buildInclusions(included);
-        this.excluded = buildExclusions(useDefaultExcludes, excluded);
+        String[] overrides = buildOverrideInclusions(useDefaultExcludes, included);
+        this.included = buildInclusions(included, overrides);
+        this.excluded = buildExclusions(useDefaultExcludes, excluded, overrides);
     }
 
     public String[] getSelectedFiles() {
@@ -69,17 +72,39 @@ private void scanIfneeded() {
         }
     }
 
-    private static String[] buildExclusions(boolean useDefaultExcludes, String... excludes) {
+    private static String[] buildExclusions(boolean useDefaultExcludes, String[] excludes, String[] overrides) {
         List<String> exclusions = new ArrayList<String>();
-        if (useDefaultExcludes)
+        if (useDefaultExcludes) {
             exclusions.addAll(asList(Default.EXCLUDES));
-        if (excludes != null && excludes.length > 0)
+        }
+        // Remove from the default exclusion list the patterns that have been explicitly included
+        for (String override : overrides) {
+            exclusions.remove(override);
+        }
+        if (excludes != null && excludes.length > 0) {
             exclusions.addAll(asList(excludes));
+        }
         return exclusions.toArray(new String[exclusions.size()]);
     }
 
-    private static String[] buildInclusions(String... includes) {
-        return includes != null && includes.length > 0 ? includes : Default.INCLUDE;
+    private static String[] buildInclusions(String[] includes, String[] overrides) {
+        // if we use the default exclusion list, we just remove
+        List<String> inclusions = new ArrayList<String>(asList(includes != null && includes.length > 0 ? includes : Default.INCLUDE));
+        inclusions.removeAll(asList(overrides));
+        if (inclusions.isEmpty()) {
+            inclusions.addAll(asList(Default.INCLUDE));
+        }
+        return inclusions.toArray(new String[inclusions.size()]);
+    }
+
+    private static String[] buildOverrideInclusions(boolean useDefaultExcludes, String[] includes) {
+        // return the list of patterns that we have explicitly included when using default exclude list
+        if (!useDefaultExcludes || includes == null || includes.length == 0) {
+            return new String[0];
+        }
+        List<String> overrides = new ArrayList<String>(asList(Default.EXCLUDES));
+        overrides.retainAll(asList(includes));
+        return overrides.toArray(new String[0]);
     }
 
 }

license-maven-plugin/src/main/java/com/mycila/maven/plugin/license/util/resource/ResourceFinder.java

@@ -18,6 +18,7 @@
 import org.apache.maven.plugin.MojoFailureException;
 
 import java.io.File;
+import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.List;
@@ -62,7 +63,12 @@ public void setPluginClassPath(ClassLoader classLoader) {
      */
     public URL findResource(String resource) throws MojoFailureException {
         // first search relatively to the base directory
-        URL res = toURL(new File(basedir, resource));
+        URL res ;
+        try {
+            res = toURL(new File(basedir, resource).getCanonicalFile());
+        } catch (IOException e) {
+            throw new MojoFailureException("Resource " + resource + " not found in file system, classpath or URL: " + e.getMessage(), e);
+        }
         if (res != null) {
             return res;
         }

license-maven-plugin/src/test/java/com/mycila/maven/plugin/license/IncludesMojoTest.java

@@ -48,4 +48,14 @@ public void test_include_and_fail() throws Exception {
         check.execute();
     }
 
+    @Test(expected = MojoExecutionException.class)
+    public void test_include_overrides_default_exclusion() throws Exception {
+        LicenseCheckMojo check = new LicenseCheckMojo();
+        check.basedir = new File("src/test/resources/issues/issue-71");
+        check.header = "../../check/header.txt";
+        check.project = new MavenProjectStub();
+        check.includes = new String[]{"**/.travis.yml"};
+        check.execute();
+    }
+
 }