Re-enable checkstyle plugin

pom.xml

@@ -394,8 +394,6 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-checkstyle-plugin</artifactId>
         <configuration>
-          <!-- TODO enable with spotless -->
-          <skip>true</skip>
           <headerLocation>config/checkstyle-header.txt</headerLocation>
           <!-- these are generated -->
           <excludes>**/HelpMojo.java,**/SpdxLicenseListData.java</excludes>

src/main/java/org/codehaus/mojo/license/extended/spreadsheet/CalcFileWriter.java

@@ -143,6 +143,7 @@ private static Color convertToOdfColor(final int[] color) {
         return new Color(color[0], color[1], color[2]);
     }
 
+    @SuppressWarnings("checkstyle:MethodLength")
     private static void createHeader(
             List<ProjectLicenseInfo> projectLicenseInfos, OdfSpreadsheetDocument spreadsheet, OdfTable table) {
         boolean hasExtendedInfo = false;
@@ -474,6 +475,7 @@ private static void createHeaderStyle(OdfSpreadsheetDocument spreadsheet) {
     Reduce parameters, complicated parameters/DTO pattern.
     But keep it still threadsafe.
      */
+    @SuppressWarnings("checkstyle:MethodLength")
     private static void writeData(
             List<ProjectLicenseInfo> projectLicenseInfos,
             OdfSpreadsheetDocument wb,

src/main/java/org/codehaus/mojo/license/extended/spreadsheet/ExcelFileWriter.java

@@ -116,6 +116,7 @@ public static void write(List<ProjectLicenseInfo> projectLicenseInfos, final Fil
         }
     }
 
+    @SuppressWarnings("checkstyle:MethodLength")
     private static void createHeader(List<ProjectLicenseInfo> projectLicenseInfos, Workbook wb, Sheet sheet) {
         boolean hasExtendedInfo = false;
         for (ProjectLicenseInfo projectLicenseInfo : projectLicenseInfos) {
@@ -354,6 +355,7 @@ private static void createHeader(List<ProjectLicenseInfo> projectLicenseInfos, W
     Clean this method up.
     Reduce parameters, complicated parameters/DTO pattern.
     But keep it still threadsafe. */
+    @SuppressWarnings("checkstyle:MethodLength")
     private static void writeData(
             List<ProjectLicenseInfo> projectLicenseInfos,
             XSSFWorkbook wb,

src/test/java/org/codehaus/mojo/license/LicenseMojoUtilsTest.java

@@ -4,7 +4,10 @@
 
 import org.junit.Test;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 
 public class LicenseMojoUtilsTest {
     private String resolvedUrl;

src/test/java/org/codehaus/mojo/license/MockLogger.java

@@ -8,7 +8,7 @@
 public class MockLogger implements LoggerFacade {
     private static final Pattern PLACEHOLDER_PATTERN = Pattern.compile("\\Q{}\\E");
 
-    private static final String format(String template, Object param) {
+    private static String format(String template, Object param) {
         return PLACEHOLDER_PATTERN.matcher(template).replaceFirst(Matcher.quoteReplacement(String.valueOf(param)));
     }
 

src/test/java/org/codehaus/mojo/license/download/LicenseSummaryTest.java

@@ -115,55 +115,49 @@ public void testWriteReadLicenseSummary()
         licSummary.add(dep3);
         licSummary.add(dep4);
 
-        {
-            File licenseSummaryFile = File.createTempFile("licSummary", "tmp");
-            LicenseSummaryWriter.writeLicenseSummary(
-                    licSummary, licenseSummaryFile, StandardCharsets.UTF_8, Eol.LF, true);
-
-            assertTrue(licenseSummaryFile.exists());
-            FileInputStream fis = new FileInputStream(licenseSummaryFile);
-            List<ProjectLicenseInfo> list = LicenseSummaryReader.parseLicenseSummary(fis);
-            fis.close();
-            ProjectLicenseInfo dep = list.get(0);
-            Assert.assertEquals("org.test", dep.getGroupId());
-            Assert.assertEquals("test1", dep.getArtifactId());
-            Assert.assertEquals("1.0", dep.getVersion());
-
-            List<ProjectLicense> licenses = dep.getLicenses();
-            Assert.assertEquals(1, licenses.size());
-            ProjectLicense lic0 = dep.getLicenses().get(0);
-            Assert.assertEquals("lgpl", lic0.getName());
-            Assert.assertEquals("http://www.gnu.org/licenses/lgpl-3.0.txt", lic0.getUrl());
-            Assert.assertEquals("lgpl-3.0.txt", lic0.getFile());
-            Assert.assertEquals("lgpl version 3.0", lic0.getComments());
-
-            validateXml(licenseSummaryFile);
-        }
+        File licenseSummaryFile = File.createTempFile("licSummary", "tmp");
+        LicenseSummaryWriter.writeLicenseSummary(licSummary, licenseSummaryFile, StandardCharsets.UTF_8, Eol.LF, true);
 
-        {
-            File licenseSummaryFile = File.createTempFile("licSummaryNoVersionNoXsd", "tmp");
-            LicenseSummaryWriter.writeLicenseSummary(
-                    licSummary, licenseSummaryFile, StandardCharsets.UTF_8, Eol.LF, false);
-
-            assertTrue(licenseSummaryFile.exists());
-            FileInputStream fis = new FileInputStream(licenseSummaryFile);
-            List<ProjectLicenseInfo> list = LicenseSummaryReader.parseLicenseSummary(fis);
-            fis.close();
-            ProjectLicenseInfo dep = list.get(0);
-            Assert.assertEquals("org.test", dep.getGroupId());
-            Assert.assertEquals("test1", dep.getArtifactId());
-            Assert.assertNull(dep.getVersion());
-
-            List<ProjectLicense> licenses = dep.getLicenses();
-            Assert.assertEquals(1, licenses.size());
-            ProjectLicense lic0 = dep.getLicenses().get(0);
-            Assert.assertEquals("lgpl", lic0.getName());
-            Assert.assertEquals("http://www.gnu.org/licenses/lgpl-3.0.txt", lic0.getUrl());
-            Assert.assertEquals("lgpl-3.0.txt", lic0.getFile());
-            Assert.assertEquals("lgpl version 3.0", lic0.getComments());
-
-            validateXml(licenseSummaryFile);
-        }
+        assertTrue(licenseSummaryFile.exists());
+        FileInputStream fis = new FileInputStream(licenseSummaryFile);
+        List<ProjectLicenseInfo> list = LicenseSummaryReader.parseLicenseSummary(fis);
+        fis.close();
+        ProjectLicenseInfo dep = list.get(0);
+        Assert.assertEquals("org.test", dep.getGroupId());
+        Assert.assertEquals("test1", dep.getArtifactId());
+        Assert.assertEquals("1.0", dep.getVersion());
+
+        List<ProjectLicense> licenses = dep.getLicenses();
+        Assert.assertEquals(1, licenses.size());
+        ProjectLicense lic0 = dep.getLicenses().get(0);
+        Assert.assertEquals("lgpl", lic0.getName());
+        Assert.assertEquals("http://www.gnu.org/licenses/lgpl-3.0.txt", lic0.getUrl());
+        Assert.assertEquals("lgpl-3.0.txt", lic0.getFile());
+        Assert.assertEquals("lgpl version 3.0", lic0.getComments());
+
+        validateXml(licenseSummaryFile);
+
+        licenseSummaryFile = File.createTempFile("licSummaryNoVersionNoXsd", "tmp");
+        LicenseSummaryWriter.writeLicenseSummary(licSummary, licenseSummaryFile, StandardCharsets.UTF_8, Eol.LF, false);
+
+        assertTrue(licenseSummaryFile.exists());
+        fis = new FileInputStream(licenseSummaryFile);
+        list = LicenseSummaryReader.parseLicenseSummary(fis);
+        fis.close();
+        dep = list.get(0);
+        Assert.assertEquals("org.test", dep.getGroupId());
+        Assert.assertEquals("test1", dep.getArtifactId());
+        Assert.assertNull(dep.getVersion());
+
+        licenses = dep.getLicenses();
+        Assert.assertEquals(1, licenses.size());
+        lic0 = dep.getLicenses().get(0);
+        Assert.assertEquals("lgpl", lic0.getName());
+        Assert.assertEquals("http://www.gnu.org/licenses/lgpl-3.0.txt", lic0.getUrl());
+        Assert.assertEquals("lgpl-3.0.txt", lic0.getFile());
+        Assert.assertEquals("lgpl version 3.0", lic0.getComments());
+
+        validateXml(licenseSummaryFile);
 
         Path licensesExcelOutputFile = Files.createTempFile("licExcel", ".xlsx");
         ExcelFileWriter.write(licSummary, licensesExcelOutputFile.toFile());

src/test/java/org/codehaus/mojo/license/header/transformer/AbstractFileHeaderTransformerTest.java

@@ -32,7 +32,10 @@
 import org.junit.Test;
 
 import static org.codehaus.mojo.license.header.transformer.AbstractFileHeaderTransformer.COPYRIGHT_PATTERN;
-import static org.codehaus.mojo.license.header.transformer.FileHeaderTransformer.*;
+import static org.codehaus.mojo.license.header.transformer.FileHeaderTransformer.DEFAULT_PROCESS_END_TAG;
+import static org.codehaus.mojo.license.header.transformer.FileHeaderTransformer.DEFAULT_PROCESS_START_TAG;
+import static org.codehaus.mojo.license.header.transformer.FileHeaderTransformer.DEFAULT_SECTION_DELIMITER;
+import static org.codehaus.mojo.license.header.transformer.FileHeaderTransformer.LINE_SEPARATOR;
 
 /**
  * Tests the {@link AbstractFileHeaderTransformer}.

src/test/java/org/codehaus/mojo/license/spdx/SpdxLicenseListTest.java

@@ -21,34 +21,25 @@ public void mimeTypes() {
 
     @Test
     public void extraAliases() {
-        final Map<String, SpdxLicenseInfo> lics = SpdxLicenseList.getLatest().getLicenses();
-        {
-            final Map<String, UrlInfo> urlInfos =
-                    lics.get("Apache-2.0").getAttachments().getUrlInfos();
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/apache2.0"));
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/apache2.0.php"));
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/apache2.0.html"));
-        }
-        {
-            final Map<String, UrlInfo> urlInfos =
-                    lics.get("BSD-2-Clause").getAttachments().getUrlInfos();
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/bsd-license"));
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/bsd-license.php"));
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/bsd-license.html"));
-        }
-        {
-            final Map<String, UrlInfo> urlInfos =
-                    lics.get("CDDL-1.0").getAttachments().getUrlInfos();
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/cddl1"));
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/cddl1.php"));
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/cddl1.html"));
-        }
-        {
-            final Map<String, UrlInfo> urlInfos =
-                    lics.get("MIT").getAttachments().getUrlInfos();
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/mit-license"));
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/mit-license.php"));
-            Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/mit-license.html"));
-        }
+        Map<String, SpdxLicenseInfo> lics = SpdxLicenseList.getLatest().getLicenses();
+        Map<String, UrlInfo> urlInfos = lics.get("Apache-2.0").getAttachments().getUrlInfos();
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/apache2.0"));
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/apache2.0.php"));
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/apache2.0.html"));
+
+        urlInfos = lics.get("BSD-2-Clause").getAttachments().getUrlInfos();
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/bsd-license"));
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/bsd-license.php"));
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/bsd-license.html"));
+
+        urlInfos = lics.get("CDDL-1.0").getAttachments().getUrlInfos();
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/cddl1"));
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/cddl1.php"));
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/cddl1.html"));
+
+        urlInfos = lics.get("MIT").getAttachments().getUrlInfos();
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/mit-license"));
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/mit-license.php"));
+        Assert.assertTrue(urlInfos.containsKey("https://opensource.org/licenses/mit-license.html"));
     }
 }