Bump Checkstyle from 10.22.0 to 10.23.0

Bump Exec from 1.0.4 to 1.0.5
Bump PMD from 1.2.1 to 1.2.2

.github/workflows/bld.yml

@@ -4,29 +4,36 @@ on: [ push, pull_request, workflow_dispatch ]
 
 jobs:
   build-bld-project:
-    runs-on: ubuntu-latest
-
     strategy:
       matrix:
-        java-version: [ 17, 20 ]
+        java-version: [ 17, 21, 24 ]
+        kotlin-version: [ 1.9.25, 2.0.21, 2.1.20 ]
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+
+    runs-on: ${{ matrix.os }}
 
     steps:
       - name: Checkout source repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
       - name: Set up JDK ${{ matrix.java-version }}
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
-          distribution: 'zulu'
+          distribution: "zulu"
           java-version: ${{ matrix.java-version }}
 
-      - name: Grant execute permission for bld
+      - name: Download dependencies [examples]
-        run: chmod +x bld
+        working-directory: examples
-
-      - name: Download the dependencies
         run: ./bld download
 
-      - name: Run tests with bld
+      - name: Compile and Run Checkstyle [examples]
-        run: ./bld compile test
+        working-directory: examples
+        run: ./bld compile checkstyle-custom
+
+      - name: Download dependencies
+        run: ./bld download
+
+      - name: Run tests
+        run: ./bld compile test

.github/workflows/pages.yml

@@ -0,0 +1,57 @@
+name: javadocs-pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["master"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow one concurrent deployment
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  # Single deploy job since we're just deploying
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout source repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: "zulu"
+          java-version: 17
+
+      - name: Build Javadocs
+        run: ./bld download clean javadoc
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v3
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          # Upload generated Javadocs repository
+          path: "build/javadoc/"
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.idea/bld.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="BldConfiguration">
+    <events />
+  </component>
+</project>

.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Erik's Code Style" />
+  </state>
+</component>

.idea/copyright/Apache_License.xml

@@ -1,6 +1,6 @@
 <component name="CopyrightManager">
   <copyright>
-    <option name="notice" value="Copyright &amp;#36;today.year the original author or authors.&#10; &#10;Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);&#10;you may not use this file except in compliance with the License.&#10;You may obtain a copy of the License at&#10;&#10;    https://www.apache.org/licenses/LICENSE-2.0&#10;&#10;Unless required by applicable law or agreed to in writing, software&#10;distributed under the License is distributed on an &quot;AS IS&quot; BASIS,&#10;WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.&#10;See the License for the specific language governing permissions and&#10;limitations under the License." />
+    <option name="notice" value="Copyright 2023-&amp;#36;today.year the original author or authors.&#10; &#10;Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);&#10;you may not use this file except in compliance with the License.&#10;You may obtain a copy of the License at&#10;&#10;    https://www.apache.org/licenses/LICENSE-2.0&#10;&#10;Unless required by applicable law or agreed to in writing, software&#10;distributed under the License is distributed on an &quot;AS IS&quot; BASIS,&#10;WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.&#10;See the License for the specific language governing permissions and&#10;limitations under the License." />
     <option name="myName" value="Apache License" />
   </copyright>
 </component>

.idea/icon.svg

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg width="100%" height="100%" viewBox="0 0 179 108" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve" xmlns:serif="http://www.serif.com/" style="fill-rule:evenodd;clip-rule:evenodd;stroke-linejoin:round;stroke-miterlimit:2;">
+    <g transform="matrix(1,0,0,1,-210.511,-96.3382)">
+        <g transform="matrix(1,0,0,1,-23.3386,-649.816)">
+            <g transform="matrix(0.221288,0,0,0.24,73.9536,390.254)">
+                <path d="M722.568,1482.92L722.568,1921.1L808.968,1921.1L808.968,1888.7C822.168,1907.9 846.168,1930.1 893.568,1930.1C933.168,1930.1 961.968,1917.5 985.368,1893.5C1012.97,1865.9 1027.37,1827.5 1027.37,1786.1C1027.37,1741.7 1011.17,1705.1 985.368,1680.5C961.968,1658.3 928.968,1644.5 892.368,1644.5C862.968,1644.5 830.568,1654.1 808.968,1683.5L808.968,1482.92L722.568,1482.92ZM871.368,1718.9C888.768,1718.9 903.768,1723.7 917.568,1736.9C930.168,1748.9 938.568,1766.3 938.568,1787.9C938.568,1807.7 930.168,1825.1 917.568,1837.1C904.368,1849.7 887.568,1855.7 872.568,1855.7C856.368,1855.7 837.168,1849.1 823.368,1835.9C813.168,1826.3 803.568,1810.1 803.568,1787.9C803.568,1765.1 812.568,1749.5 822.768,1738.7C836.568,1724.3 852.768,1718.9 871.368,1718.9Z" style="fill:rgb(35,146,255);fill-rule:nonzero;"/>
+                <rect x="1083.77" y="1482.92" width="86.4" height="438.182" style="fill:rgb(250,144,82);fill-rule:nonzero;"/>
+                <path d="M1531.37,1482.92L1444.97,1482.92L1444.97,1683.5C1423.37,1654.1 1390.97,1644.5 1361.57,1644.5C1324.97,1644.5 1291.97,1658.3 1268.57,1680.5C1242.77,1705.1 1226.57,1741.7 1226.57,1786.1C1226.57,1827.5 1240.97,1865.9 1268.57,1893.5C1291.97,1917.5 1320.77,1930.1 1360.37,1930.1C1407.77,1930.1 1431.77,1907.9 1444.97,1888.7L1444.97,1921.1L1531.37,1921.1L1531.37,1482.92ZM1382.57,1718.9C1401.17,1718.9 1417.37,1724.3 1431.17,1738.7C1441.37,1749.5 1450.37,1765.1 1450.37,1787.9C1450.37,1810.1 1440.77,1826.3 1430.57,1835.9C1416.77,1849.1 1397.57,1855.7 1381.37,1855.7C1366.37,1855.7 1349.57,1849.7 1336.37,1837.1C1323.77,1825.1 1315.37,1807.7 1315.37,1787.9C1315.37,1766.3 1323.77,1748.9 1336.37,1736.9C1350.17,1723.7 1365.17,1718.9 1382.57,1718.9Z" style="fill:rgb(35,146,255);fill-rule:nonzero;"/>
+            </g>
+        </g>
+    </g>
+</svg>

.idea/intellij-javadocs-4.0.1.xml

@@ -0,0 +1,204 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaDocConfiguration">
+    <GENERAL>
+      <MODE>UPDATE</MODE>
+      <OVERRIDDEN_METHODS>false</OVERRIDDEN_METHODS>
+      <SPLITTED_CLASS_NAME>true</SPLITTED_CLASS_NAME>
+      <LEVELS>
+        <LEVEL>FIELD</LEVEL>
+        <LEVEL>METHOD</LEVEL>
+        <LEVEL>TYPE</LEVEL>
+      </LEVELS>
+      <VISIBILITIES>
+        <VISIBILITY>PUBLIC</VISIBILITY>
+        <VISIBILITY>PROTECTED</VISIBILITY>
+        <VISIBILITY>DEFAULT</VISIBILITY>
+      </VISIBILITIES>
+    </GENERAL>
+    <TEMPLATES>
+      <CLASSES>
+        <CLASS>
+          <KEY>^.*(public|protected|private)*.+interface\s+\w+.*</KEY>
+          <VALUE>/**\n
+ * The interface ${name}.\n
+&lt;#if element.typeParameters?has_content&gt;        * \n
+&lt;/#if&gt;
+&lt;#list element.typeParameters as typeParameter&gt;
+        * @param &lt;${typeParameter.name}&gt; the type parameter\n
+&lt;/#list&gt;
+ */</VALUE>
+        </CLASS>
+        <CLASS>
+          <KEY>^.*(public|protected|private)*.+enum\s+\w+.*</KEY>
+          <VALUE>/**\n
+ * The enum ${name}.\n
+ */</VALUE>
+        </CLASS>
+        <CLASS>
+          <KEY>^.*(public|protected|private)*.+class\s+\w+.*</KEY>
+          <VALUE>/**\n
+ * The type ${name}.\n
+&lt;#if element.typeParameters?has_content&gt;        * \n
+&lt;/#if&gt;
+&lt;#list element.typeParameters as typeParameter&gt;
+        * @param &lt;${typeParameter.name}&gt; the type parameter\n
+&lt;/#list&gt;
+ */</VALUE>
+        </CLASS>
+        <CLASS>
+          <KEY>.+</KEY>
+          <VALUE>/**\n
+ * The type ${name}.\n
+ */</VALUE>
+        </CLASS>
+      </CLASSES>
+      <CONSTRUCTORS>
+        <CONSTRUCTOR>
+          <KEY>.+</KEY>
+          <VALUE>/**\n
+ * Instantiates a new ${name}.\n
+&lt;#if element.parameterList.parameters?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.parameterList.parameters as parameter&gt;
+         * @param ${parameter.name} the ${paramNames[parameter.name]}\n
+&lt;/#list&gt;
+&lt;#if element.throwsList.referenceElements?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.throwsList.referenceElements as exception&gt;
+         * @throws ${exception.referenceName} the ${exceptionNames[exception.referenceName]}\n
+&lt;/#list&gt;
+ */</VALUE>
+        </CONSTRUCTOR>
+      </CONSTRUCTORS>
+      <METHODS>
+        <METHOD>
+          <KEY>^.*(public|protected|private)*\s*.*(\w(\s*&lt;.+&gt;)*)+\s+get\w+\s*\(.*\).+</KEY>
+          <VALUE>/**\n
+ * Gets ${partName}.\n
+&lt;#if element.typeParameters?has_content&gt;         * \n
+&lt;/#if&gt;
+&lt;#list element.typeParameters as typeParameter&gt;
+         * @param &lt;${typeParameter.name}&gt; the type parameter\n
+&lt;/#list&gt;
+&lt;#if element.parameterList.parameters?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.parameterList.parameters as parameter&gt;
+         * @param ${parameter.name} the ${paramNames[parameter.name]}\n
+&lt;/#list&gt;
+&lt;#if isNotVoid&gt;
+         *\n
+         * @return the ${partName}\n
+&lt;/#if&gt;
+&lt;#if element.throwsList.referenceElements?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.throwsList.referenceElements as exception&gt;
+         * @throws ${exception.referenceName} the ${exceptionNames[exception.referenceName]}\n
+&lt;/#list&gt;
+ */</VALUE>
+        </METHOD>
+        <METHOD>
+          <KEY>^.*(public|protected|private)*\s*.*(void|\w(\s*&lt;.+&gt;)*)+\s+set\w+\s*\(.*\).+</KEY>
+          <VALUE>/**\n
+ * Sets ${partName}.\n
+&lt;#if element.typeParameters?has_content&gt;         * \n
+&lt;/#if&gt;
+&lt;#list element.typeParameters as typeParameter&gt;
+         * @param &lt;${typeParameter.name}&gt; the type parameter\n
+&lt;/#list&gt;
+&lt;#if element.parameterList.parameters?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.parameterList.parameters as parameter&gt;
+         * @param ${parameter.name} the ${paramNames[parameter.name]}\n
+&lt;/#list&gt;
+&lt;#if isNotVoid&gt;
+         *\n
+         * @return the ${partName}\n
+&lt;/#if&gt;
+&lt;#if element.throwsList.referenceElements?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.throwsList.referenceElements as exception&gt;
+         * @throws ${exception.referenceName} the ${exceptionNames[exception.referenceName]}\n
+&lt;/#list&gt;
+ */</VALUE>
+        </METHOD>
+        <METHOD>
+          <KEY>^.*((public\s+static)|(static\s+public))\s+void\s+main\s*\(\s*String\s*(\[\s*\]|\.\.\.)\s+\w+\s*\).+</KEY>
+          <VALUE>/**\n
+ * The entry point of application.\n
+
+     &lt;#if element.parameterList.parameters?has_content&gt;
+         *\n
+&lt;/#if&gt;
+     * @param ${element.parameterList.parameters[0].name} the input arguments\n
+&lt;#if element.throwsList.referenceElements?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.throwsList.referenceElements as exception&gt;
+         * @throws ${exception.referenceName} the ${exceptionNames[exception.referenceName]}\n
+&lt;/#list&gt;
+ */</VALUE>
+        </METHOD>
+        <METHOD>
+          <KEY>.+</KEY>
+          <VALUE>/**\n
+ * ${name}&lt;#if isNotVoid&gt; ${return}&lt;/#if&gt;.\n
+&lt;#if element.typeParameters?has_content&gt;         * \n
+&lt;/#if&gt;
+&lt;#list element.typeParameters as typeParameter&gt;
+         * @param &lt;${typeParameter.name}&gt; the type parameter\n
+&lt;/#list&gt;
+&lt;#if element.parameterList.parameters?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.parameterList.parameters as parameter&gt;
+         * @param ${parameter.name} the ${paramNames[parameter.name]}\n
+&lt;/#list&gt;
+&lt;#if isNotVoid&gt;
+         *\n
+         * @return the ${return}\n
+&lt;/#if&gt;
+&lt;#if element.throwsList.referenceElements?has_content&gt;
+         *\n
+&lt;/#if&gt;
+&lt;#list element.throwsList.referenceElements as exception&gt;
+         * @throws ${exception.referenceName} the ${exceptionNames[exception.referenceName]}\n
+&lt;/#list&gt;
+ */</VALUE>
+        </METHOD>
+      </METHODS>
+      <FIELDS>
+        <FIELD>
+          <KEY>^.*(public|protected|private)*.+static.*(\w\s\w)+.+</KEY>
+          <VALUE>/**\n
+ * The constant ${element.getName()}.\n
+ */</VALUE>
+        </FIELD>
+        <FIELD>
+          <KEY>^.*(public|protected|private)*.*(\w\s\w)+.+</KEY>
+          <VALUE>/**\n
+    &lt;#if element.parent.isInterface()&gt;
+        * The constant ${element.getName()}.\n
+&lt;#else&gt;
+        * The ${name}.\n
+&lt;/#if&gt; */</VALUE>
+        </FIELD>
+        <FIELD>
+          <KEY>.+</KEY>
+          <VALUE>/**\n
+    &lt;#if element.parent.isEnum()&gt;
+        *${name} ${typeName}.\n
+&lt;#else&gt;
+        * The ${name}.\n
+&lt;/#if&gt;*/</VALUE>
+        </FIELD>
+      </FIELDS>
+    </TEMPLATES>
+  </component>
+</project>

.idea/libraries/bld.xml

@@ -2,11 +2,12 @@
   <library name="bld">
     <CLASSES>
       <root url="file://$PROJECT_DIR$/lib/bld" />
-      <root url="jar://$USER_HOME$/.bld/dist/bld-1.7.5.jar!/" />
+      <root url="jar://$USER_HOME$/.bld/dist/bld-2.2.1.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES>
-      <root url="jar://$USER_HOME$/.bld/dist/bld-1.7.5-sources.jar!/" />
+      <root url="file://$PROJECT_DIR$/lib/bld" />
+      <root url="jar://$USER_HOME$/.bld/dist/bld-2.2.1-sources.jar!/" />
     </SOURCES>
     <excluded>
       <root url="jar://$PROJECT_DIR$/lib/bld/bld-wrapper.jar!/" />
@@ -14,4 +15,4 @@
     <jarDirectory url="file://$PROJECT_DIR$/lib/bld" recursive="false" />
     <jarDirectory url="file://$PROJECT_DIR$/lib/bld" recursive="false" type="SOURCES" />
   </library>
-</component>
+</component>

.idea/libraries/compile.xml

@@ -7,7 +7,7 @@
     <SOURCES>
       <root url="file://$PROJECT_DIR$/lib/compile" />
     </SOURCES>
-    <jarDirectory url="file://$PROJECT_DIR$/lib/compile" recursive="false" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/compile" recursive="true" />
-    <jarDirectory url="file://$PROJECT_DIR$/lib/compile" recursive="false" type="SOURCES" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/compile" recursive="true" type="SOURCES" />
   </library>
 </component>

.idea/libraries/runtime.xml

@@ -8,7 +8,7 @@
     <SOURCES>
       <root url="file://$PROJECT_DIR$/lib/runtime" />
     </SOURCES>
-    <jarDirectory url="file://$PROJECT_DIR$/lib/runtime" recursive="false" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/runtime" recursive="true" />
-    <jarDirectory url="file://$PROJECT_DIR$/lib/runtime" recursive="false" type="SOURCES" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/runtime" recursive="true" type="SOURCES" />
   </library>
 </component>

.idea/libraries/test.xml

@@ -8,7 +8,7 @@
     <SOURCES>
       <root url="file://$PROJECT_DIR$/lib/test" />
     </SOURCES>
-    <jarDirectory url="file://$PROJECT_DIR$/lib/test" recursive="false" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/test" recursive="true" />
-    <jarDirectory url="file://$PROJECT_DIR$/lib/test" recursive="false" type="SOURCES" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/test" recursive="true" type="SOURCES" />
   </library>
 </component>

.idea/misc.xml

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="EntryPointsManager">
     <pattern value="rife.bld.extension.CheckstyleOperationBuild" />
@@ -8,6 +9,18 @@
     <option name="customRuleSets">
       <list>
         <option value="$PROJECT_DIR$/config/pmd.xml" />
+        <option value="K:\java\semver\config\pmd.xml" />
+        <option value="$PROJECT_DIR$/../bld-generated-version/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../bld-pitest/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../bld-jacoco-report/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../bld-exec/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../bld-testng/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../../bld-generated-version/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../../bld-pitest/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../../bld-jacoco-report/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../../bld-checkstyle/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../../bld-exec/config/pmd.xml" />
+        <option value="$PROJECT_DIR$/../../bld-testng/config/pmd.xml" />
       </list>
     </option>
     <option name="skipTestSources" value="false" />

.vscode/launch.json

@@ -5,7 +5,14 @@
             "type": "java",
             "name": "Run Tests",
             "request": "launch",
-            "mainClass": "rife.bld.extension.CheckstyleOperationTest"
+            "mainClass": "org.junit.platform.console.ConsoleLauncher",
+            "args": [
+                "--details=verbose",
+                "--scan-classpath",
+                "--disable-banner",
+                "--disable-ansi-colors",
+                "--exclude-engine=junit-platform-suite",
+                "--exclude-engine=junit-vintage"]
         }
     ]
 }

.vscode/settings.json

@@ -3,13 +3,14 @@
         "src/main/java",
         "src/main/resources",
         "src/test/java",
-        "src/bld/java"
+        "src/test/resources",
+        "src/bld/java",
+        "src/bld/resources"
     ],
     "java.configuration.updateBuildConfiguration": "automatic",
     "java.project.referencedLibraries": [
-        "${HOME}/.bld/dist/bld-1.7.5.jar",
+        "${HOME}/.bld/dist/bld-2.2.1.jar",
-        "lib/compile/*.jar",
+        "lib/**/*.jar"
-        "lib/runtime/*.jar",
+    ],
-        "lib/test/*.jar"
+    "java.compile.nullAnalysis.mode": "automatic"
-    ]
 }

README.md

@@ -1,13 +1,21 @@
-# [Checkstyle](https://checkstyle.sourceforge.io/) Extension for [b<span style="color:orange">l</span>d](https://rife2.com/bldb) 
+# [Checkstyle](https://checkstyle.sourceforge.io/) Extension for [b<span style="color:orange">l</span>d](https://rife2.com/bld)
 
 [![License](https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 [![Java](https://img.shields.io/badge/java-17%2B-blue)](https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html)
-[![bld](https://img.shields.io/badge/1.7.3-FA9052?label=bld&labelColor=2392FF)](https://rife2.com/bld)
+[![bld](https://img.shields.io/badge/2.2.1-FA9052?label=bld&labelColor=2392FF)](https://rife2.com/bld)
 [![Release](https://flat.badgen.net/maven/v/metadata-url/repo.rife2.com/releases/com/uwyn/rife2/bld-checkstyle/maven-metadata.xml?color=blue)](https://repo.rife2.com/#/releases/com/uwyn/rife2/bld-checkstyle)
 [![Snapshot](https://flat.badgen.net/maven/v/metadata-url/repo.rife2.com/snapshots/com/uwyn/rife2/bld-checkstyle/maven-metadata.xml?label=snapshot)](https://repo.rife2.com/#/snapshots/com/uwyn/rife2/bld-checkstyle)
 [![GitHub CI](https://github.com/rife2/bld-checkstyle/actions/workflows/bld.yml/badge.svg)](https://github.com/rife2/bld-checkstyle/actions/workflows/bld.yml)
 
-To install, please refer to the [extensions documentation](https://github.com/rife2/bld/wiki/Extensions).
+To install the latest version, add the following to the `lib/bld/bld-wrapper.properties` file:
+
+```properties
+bld.extension-checkstyle=com.uwyn.rife2:bld-checkstyle
+```
+
+For more information, please refer to the [extensions](https://github.com/rife2/bld/wiki/Extensions) documentation.
+
+## Check Source Code with Checkstyle
 
 To check your code with Chesktyle, include the following in your build file:
 
@@ -21,19 +29,21 @@ public void checkstyle() throws Exception {
 }
 ```
 
-```
+```console
 ./bld checkstyle
 ```
 
 - [View Examples](https://github.com/rife2/bld-checkstyle/blob/master/examples/src/bld/java/com/example/)
 
-Please check the [CheckstyleOperation documentation](https://rife2.github.io/bld-checkstyle/rife/bld/extension/CheckstyleOperation.html#method-summary) for all available configuration options.
+Please check the [CheckstyleOperation documentation](https://rife2.github.io/bld-checkstyle/rife/bld/extension/CheckstyleOperation.html#method-summary)
+for all available configuration options.
 
-### Checkstyle Dependency
+## Checkstyle Dependency
 
-Don't forget to add a Checkstyle `test` dependency to your build file, as it is not provided by the extension. For example:
+Don't forget to add a Checkstyle `test` dependency to your build file, as it is
+not provided by the extension. For example:
 
 ```java
 repositories = List.of(MAVEN_CENTRAL);
-scope(test).include(dependency("com.puppycrawl.tools", "checkstyle", version(10, 12, 2)));
+scope(test).include(dependency("com.puppycrawl.tools", "checkstyle", version(10, 23, 0)));
-
+```

config/pmd.xml

@@ -7,9 +7,9 @@
     <!-- BEST PRACTICES -->
     <rule ref="category/java/bestpractices.xml">
         <exclude name="AvoidPrintStackTrace"/>
-        <exclude name="JUnit4TestShouldUseTestAnnotation"/>
-        <exclude name="JUnitTestContainsTooManyAsserts"/>
         <exclude name="GuardLogStatement"/>
+        <exclude name="UnitTestContainsTooManyAsserts"/>
+        <exclude name="UnitTestShouldUseTestAnnotation"/>
     </rule>
 
     <rule ref="category/java/bestpractices.xml/MissingOverride">
@@ -19,12 +19,13 @@
         </properties>
     </rule>
 
+
     <!-- CODE STYLE -->
     <rule ref="category/java/codestyle.xml">
         <exclude name="AtLeastOneConstructor"/>
         <exclude name="ClassNamingConventions"/>
-        <exclude name="ConfusingTernary"/>
         <exclude name="CommentDefaultAccessModifier"/>
+        <exclude name="ConfusingTernary"/>
         <exclude name="FieldNamingConventions"/>
         <exclude name="LocalVariableCouldBeFinal"/>
         <exclude name="LongVariable"/>
@@ -34,8 +35,9 @@
         <exclude name="ShortClassName"/>
         <exclude name="ShortMethodName"/>
         <exclude name="ShortVariable"/>
-        <exclude name="UselessParentheses"/>
+        <exclude name="UseExplicitTypes"/>
         <exclude name="UseUnderscoresInNumericLiterals"/>
+        <exclude name="UselessParentheses"/>
     </rule>
 
     <rule ref="category/java/codestyle.xml/UnnecessaryImport">
@@ -51,8 +53,6 @@
         <exclude name="AvoidUncheckedExceptionsInSignatures"/>
         <exclude name="CognitiveComplexity"/>
         <exclude name="CyclomaticComplexity"/>
-        <exclude name="ExcessiveClassLength"/>
-        <exclude name="ExcessiveMethodLength"/>
         <exclude name="ExcessiveParameterList"/>
         <exclude name="ExcessivePublicCount"/>
         <exclude name="GodClass"/>
@@ -106,4 +106,4 @@
     <!-- SECURITY -->
     <rule ref="category/java/security.xml">
     </rule>
-</ruleset>
+</ruleset>

examples/.idea/.name

@@ -0,0 +1 @@
+bld-checkstyle-examples

examples/.idea/libraries/bld.xml

@@ -2,11 +2,12 @@
   <library name="bld">
     <CLASSES>
       <root url="file://$PROJECT_DIR$/lib/bld" />
-      <root url="jar://$USER_HOME$/.bld/dist/bld-1.7.5.jar!/" />
+      <root url="jar://$USER_HOME$/.bld/dist/bld-2.2.1.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES>
-      <root url="jar://$USER_HOME$/.bld/dist/bld-1.7.5-sources.jar!/" />
+      <root url="file://$PROJECT_DIR$/lib/bld" />
+      <root url="jar://$USER_HOME$/.bld/dist/bld-2.2.1-sources.jar!/" />
     </SOURCES>
     <excluded>
       <root url="jar://$PROJECT_DIR$/lib/bld/bld-wrapper.jar!/" />
@@ -14,4 +15,4 @@
     <jarDirectory url="file://$PROJECT_DIR$/lib/bld" recursive="false" />
     <jarDirectory url="file://$PROJECT_DIR$/lib/bld" recursive="false" type="SOURCES" />
   </library>
-</component>
+</component>

examples/.idea/libraries/compile.xml

@@ -7,7 +7,7 @@
     <SOURCES>
       <root url="file://$PROJECT_DIR$/lib/compile" />
     </SOURCES>
-    <jarDirectory url="file://$PROJECT_DIR$/lib/compile" recursive="false" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/compile" recursive="true" />
-    <jarDirectory url="file://$PROJECT_DIR$/lib/compile" recursive="false" type="SOURCES" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/compile" recursive="true" type="SOURCES" />
   </library>
 </component>

examples/.idea/libraries/runtime.xml

@@ -8,7 +8,7 @@
     <SOURCES>
       <root url="file://$PROJECT_DIR$/lib/runtime" />
     </SOURCES>
-    <jarDirectory url="file://$PROJECT_DIR$/lib/runtime" recursive="false" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/runtime" recursive="true" />
-    <jarDirectory url="file://$PROJECT_DIR$/lib/runtime" recursive="false" type="SOURCES" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/runtime" recursive="true" type="SOURCES" />
   </library>
 </component>

examples/.idea/libraries/test.xml

@@ -8,7 +8,7 @@
     <SOURCES>
       <root url="file://$PROJECT_DIR$/lib/test" />
     </SOURCES>
-    <jarDirectory url="file://$PROJECT_DIR$/lib/test" recursive="false" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/test" recursive="true" />
-    <jarDirectory url="file://$PROJECT_DIR$/lib/test" recursive="false" type="SOURCES" />
+    <jarDirectory url="file://$PROJECT_DIR$/lib/test" recursive="true" type="SOURCES" />
   </library>
 </component>

examples/.idea/misc.xml

@@ -1,5 +1,8 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="EntryPointsManager">
+    <pattern value="com.example.ExamplesBuild" method="checkstyle" />
+    <pattern value="com.example.ExamplesBuild" />
+  </component>
   <component name="PDMPlugin">
     <option name="customRuleSets">
       <list>
@@ -11,4 +14,4 @@
   <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="17" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build" />
   </component>
-</project>
+</project>

examples/.vscode/settings.json

@@ -3,13 +3,13 @@
         "src/main/java",
         "src/main/resources",
         "src/test/java",
-        "src/bld/java"
+        "src/test/resources",
+        "src/bld/java",
+        "src/bld/resources"
     ],
     "java.configuration.updateBuildConfiguration": "automatic",
     "java.project.referencedLibraries": [
-        "${HOME}/.bld/dist/bld-1.7.5.jar",
+        "${HOME}/.bld/dist/bld-2.2.1.jar",
-        "lib/compile/*.jar",
+        "lib/**/*.jar"
-        "lib/runtime/*.jar",
-        "lib/test/*.jar"
     ]
 }

examples/README.md

@@ -0,0 +1,6 @@
+# Compile and Run Checkstyle
+
+```console
+./bld compile checkstyle
+```
+

examples/lib/bld/bld-wrapper.properties

@@ -1,7 +1,7 @@
 bld.downloadExtensionJavadoc=false
 bld.downloadExtensionSources=true
-bld.extensions=com.uwyn.rife2:bld-checkstyle:0.9.0-SNAPSHOT
-bld.repositories=MAVEN_LOCAL,MAVEN_CENTRAL,RIFE2_RELEASES
 bld.downloadLocation=
+bld.extension-checkstyle=com.uwyn.rife2:bld-checkstyle:1.0.14
+bld.repositories=MAVEN_LOCAL,MAVEN_CENTRAL,RIFE2_SNAPSHOTS,RIFE2_RELEASES
 bld.sourceDirectories=
-bld.version=1.7.5
+bld.version=2.2.1

examples/src/bld/java/com/example/ExamplesBuild.java

@@ -5,6 +5,9 @@ import rife.bld.BuildCommand;
 import rife.bld.extension.CheckstyleOperation;
 
 import java.util.List;
+import java.util.logging.ConsoleHandler;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 import static rife.bld.dependencies.Repository.MAVEN_CENTRAL;
 import static rife.bld.dependencies.Scope.*;
@@ -16,19 +19,33 @@ public class ExamplesBuild extends BaseProject {
         mainClass = "com.example.ExamplesMain";
         version = version(0, 1, 0);
 
+        javaRelease = 17;
+
+        autoDownloadPurge = true;
         downloadSources = true;
+
         repositories = List.of(MAVEN_CENTRAL);
 
-        scope(test).include(dependency("com.puppycrawl.tools", "checkstyle", version(10, 12, 4)));
+        scope(test).include(dependency("com.puppycrawl.tools", "checkstyle", version(10, 23, 0)));
 
         testOperation().mainClass("com.example.ExamplesTest");
     }
 
     public static void main(String[] args) {
+        // Enable detailed logging for the extensions
+        var level = Level.ALL;
+        var logger = Logger.getLogger("rife.bld.extension");
+        var consoleHandler = new ConsoleHandler();
+
+        consoleHandler.setLevel(level);
+        logger.addHandler(consoleHandler);
+        logger.setLevel(level);
+        logger.setUseParentHandlers(false);
+
         new ExamplesBuild().start(args);
     }
 
-    @BuildCommand(summary = "Check code style")
+    @BuildCommand(summary = "Check code style using Sun coding conventions")
     public void checkstyle() throws Exception {
         new CheckstyleOperation()
                 .fromProject(this)
@@ -36,4 +53,11 @@ public class ExamplesBuild extends BaseProject {
                 .execute();
     }
 
-}
+    @BuildCommand(value = "checkstyle-custom", summary = "Check code style using custom coding conventions")
+    public void checkstyleCustom() throws Exception {
+        new CheckstyleOperation()
+                .fromProject(this)
+                .configurationFile("src/test/resources/checkstyle.xml")
+                .execute();
+    }
+}

examples/src/test/resources/checkstyle.xml

@@ -0,0 +1,10 @@
+<!DOCTYPE module PUBLIC
+  "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
+  "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+<module name="Checker">
+    <module name="TreeWalker">
+        <module name="AvoidStarImport">
+            <property name="severity" value="warning" />
+        </module>
+    </module>
+</module>

lib/bld/bld-wrapper.properties

@@ -1,8 +1,8 @@
 bld.downloadExtensionJavadoc=false
 bld.downloadExtensionSources=true
-bld.extension-pmd=com.uwyn.rife2:bld-pmd:0.9.2
-bld.extension-jacoco=com.uwyn.rife2:bld-jacoco-report:0.9.0
-bld.repositories=MAVEN_CENTRAL,RIFE2_SNAPSHOTS,RIFE2_RELEASES
 bld.downloadLocation=
+bld.extension-exec=com.uwyn.rife2:bld-exec:1.0.5
+bld.extension-pmd=com.uwyn.rife2:bld-pmd:1.2.2
+bld.repositories=MAVEN_CENTRAL,MAVEN_LOCAL,RIFE2_SNAPSHOTS,RIFE2_RELEASES
 bld.sourceDirectories=
-bld.version=1.7.5
+bld.version=2.2.1

scripts/checkcliargs.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+main="com.puppycrawl.tools.checkstyle.Main"
+new=/tmp/checkcliargs-new
+old=/tmp/checkcliargs-old
+
+java -cp "lib/test/*" $main --help >$new
+java -cp "examples/lib/test/*" $main --help >$old
+
+if [ "$1" == "-v" ]; then
+	code --wait --diff $old $new
+else
+	diff $old $new
+fi
+
+rm -rf $new $old

scripts/cliargs.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+java -cp "lib/test/*" com.puppycrawl.tools.checkstyle.Main --help |\
+grep "^  -.*" |\
+sed -e "s/  -/-/" -e "s/[,=].*//" -e '/-V/d' -e '/-h/d' |\
+sort > "src/test/resources/checkstyle-args.txt"

src/bld/java/rife/bld/extension/CheckstyleOperationBuild.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023 the original author or authors.
+ * Copyright 2023-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,53 +22,65 @@ import rife.bld.publish.PublishDeveloper;
 import rife.bld.publish.PublishLicense;
 import rife.bld.publish.PublishScm;
 
-import java.io.IOException;
 import java.util.List;
+import java.util.Locale;
 
-import static rife.bld.dependencies.Repository.MAVEN_CENTRAL;
+import static rife.bld.dependencies.Repository.*;
-import static rife.bld.dependencies.Repository.RIFE2_RELEASES;
+import static rife.bld.dependencies.Scope.compile;
-import static rife.bld.dependencies.Scope.*;
+import static rife.bld.dependencies.Scope.test;
 import static rife.bld.operations.JavadocOptions.DocLinkOption.NO_MISSING;
 
 public class CheckstyleOperationBuild extends Project {
     public CheckstyleOperationBuild() {
         pkg = "rife.bld.extension";
         name = "CheckstyleOperation";
-        version = version(0, 9, 0, "SNAPSHOT");
+        version = version(1, 0, 15, "SNAPSHOT");
 
         javaRelease = 17;
+
         downloadSources = true;
         autoDownloadPurge = true;
-        repositories = List.of(MAVEN_CENTRAL, RIFE2_RELEASES);
+
+        repositories = List.of(MAVEN_LOCAL, MAVEN_CENTRAL, RIFE2_RELEASES, RIFE2_SNAPSHOTS);
 
         scope(compile)
-                .include(dependency("com.uwyn.rife2", "bld", version(1, 7, 5)));
+                .include(dependency("com.uwyn.rife2", "bld", version(2, 2, 1)));
         scope(test)
-                .include(dependency("com.puppycrawl.tools", "checkstyle", version(10, 12, 4)))
+                .include(dependency("com.puppycrawl.tools", "checkstyle", version(10, 23, 0)))
-                .include(dependency("org.jsoup", "jsoup", version(1, 16, 2)))
+                .include(dependency("org.junit.jupiter", "junit-jupiter", version(5, 12, 1)))
-                .include(dependency("org.junit.jupiter", "junit-jupiter", version(5, 10, 0)))
+                .include(dependency("org.junit.platform", "junit-platform-console-standalone", version(1, 12, 1)))
-                .include(dependency("org.junit.platform", "junit-platform-console-standalone", version(1, 10, 0)))
+                .include(dependency("org.assertj", "assertj-core", version(3, 27, 3)));
-                .include(dependency("org.assertj", "assertj-core", version(3, 24, 2)));
+
         javadocOperation()
                 .javadocOptions()
+                .author()
                 .docLint(NO_MISSING)
                 .link("https://rife2.github.io/bld/")
                 .link("https://rife2.github.io/rife2/");
 
         publishOperation()
                 .repository(version.isSnapshot() ? repository("rife2-snapshot") : repository("rife2"))
+                .repository(repository("github"))
                 .info()
                 .groupId("com.uwyn.rife2")
                 .artifactId("bld-checkstyle")
-                .description("bld Checkstyle Extensions")
+                .description("bld Checkstyle Extension")
                 .url("https://github.com/rife2/bld-checkstyle")
-                .developer(new PublishDeveloper().id("ethauvin").name("Erik C. Thauvin").email("erik@thauvin.net")
+                .developer(new PublishDeveloper()
-                        .url("https://erik.thauvin.net/"))
+                        .id("ethauvin")
-                .license(new PublishLicense().name("The Apache License, Version 2.0")
+                        .name("Erik C. Thauvin")
-                        .url("http://www.apache.org/licenses/LICENSE-2.0.txt"))
+                        .email("erik@thauvin.net")
-                .scm(new PublishScm().connection("scm:git:https://github.com/rife2/bld-checkstyle.git")
+                        .url("https://erik.thauvin.net/")
+                )
+                .license(new PublishLicense()
+                        .name("The Apache License, Version 2.0")
+                        .url("https://www.apache.org/licenses/LICENSE-2.0.txt")
+                )
+                .scm(new PublishScm()
+                        .connection("scm:git:https://github.com/rife2/bld-checkstyle.git")
                         .developerConnection("scm:git:git@github.com:rife2/bld-checkstyle.git")
-                        .url("https://github.com/rife2/bld-checkstyle"))
+                        .url("https://github.com/rife2/bld-checkstyle")
+                )
                 .signKey(property("sign.key"))
                 .signPassphrase(property("sign.passphrase"));
     }
@@ -77,19 +89,24 @@ public class CheckstyleOperationBuild extends Project {
         new CheckstyleOperationBuild().start(args);
     }
 
-    @BuildCommand(summary = "Generates JaCoCo Reports")
-    public void jacoco() throws IOException {
-        new JacocoReportOperation()
-                .fromProject(this)
-                .execute();
-    }
-
     @BuildCommand(summary = "Runs PMD analysis")
-    public void pmd() {
+    public void pmd() throws Exception {
         new PmdOperation()
                 .fromProject(this)
                 .failOnViolation(true)
                 .ruleSets("config/pmd.xml")
                 .execute();
     }
+
+    @Override
+    public void test() throws Exception {
+        var os = System.getProperty("os.name");
+        if (os != null && os.toLowerCase(Locale.US).contains("linux")) {
+            new ExecOperation()
+                    .fromProject(this)
+                    .command("scripts/cliargs.sh")
+                    .execute();
+        }
+        super.test();
+    }
 }

src/main/java/rife/bld/extension/CheckstyleOperation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023 the original author or authors.
+ * Copyright 2023-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,11 +17,16 @@
 package rife.bld.extension;
 
 import rife.bld.BaseProject;
+import rife.bld.extension.checkstyle.OutputFormat;
 import rife.bld.operations.AbstractProcessOperation;
+import rife.bld.operations.exceptions.ExitStatusException;
 
+import java.io.File;
+import java.io.IOException;
 import java.nio.file.Path;
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 /**
@@ -32,22 +37,23 @@ import java.util.logging.Logger;
  */
 public class CheckstyleOperation extends AbstractProcessOperation<CheckstyleOperation> {
     private static final Logger LOGGER = Logger.getLogger(CheckstyleOperation.class.getName());
-    /**
+    private final Collection<String> excludeRegex_ = new ArrayList<>();
-     * The command line options.
+    private final Collection<File> exclude_ = new ArrayList<>();
-     */
+    private final Map<String, String> options_ = new ConcurrentHashMap<>();
-    protected final Map<String, String> options = new ConcurrentHashMap<>();
+    private final Set<File> sourceDir_ = new TreeSet<>();
 
-    /**
-     * The source files(s) or folder(s).
-     */
-    protected final Set<String> sourceDirs = new TreeSet<>();
     private BaseProject project_;
 
     /**
      * Shows Abstract Syntax Tree(AST) branches that match given XPath query.
+     *
+     * @param xPathQuery the xPath query
+     * @return the checkstyle operation
      */
     public CheckstyleOperation branchMatchingXpath(String xPathQuery) {
-        options.put("-b", xPathQuery);
+        if (isNotBlank(xPathQuery)) {
+            options_.put("-b", xPathQuery);
+        }
         return this;
     }
 
@@ -55,88 +61,216 @@ public class CheckstyleOperation extends AbstractProcessOperation<CheckstyleOper
      * Specifies the location of the file that defines the configuration modules. The location can either be a
      * filesystem location, or a name passed to the {@link ClassLoader#getResource(String) ClassLoader.getResource() }
      * method. A configuration file is required.
+     *
+     * @param file the file
+     * @return the checkstyle operation
      */
     public CheckstyleOperation configurationFile(String file) {
-        options.put("-c", file);
+        if (isNotBlank(file)) {
+            options_.put("-c", file);
+        }
         return this;
     }
 
     /**
-     * Prints all debug logging of CheckStyle utility.
+     * Specifies the location of the file that defines the configuration modules. The location can either be a
+     * filesystem location, or a name passed to the {@link ClassLoader#getResource(String) ClassLoader.getResource() }
+     * method. A configuration file is required.
+     *
+     * @param file the file
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation configurationFile(File file) {
+        return configurationFile(file.getAbsolutePath());
+    }
+
+    /**
+     * Specifies the location of the file that defines the configuration modules. The location can either be a
+     * filesystem location, or a name passed to the {@link ClassLoader#getResource(String) ClassLoader.getResource() }
+     * method. A configuration file is required.
+     *
+     * @param file the file
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation configurationFile(Path file) {
+        return configurationFile(file.toFile().getAbsolutePath());
+    }
+
+    /**
+     * Prints all debug logging of Checkstyle utility.
+     *
+     * @param isDebug {@code true} or {@code false}
+     * @return the checkstyle operation
      */
     public CheckstyleOperation debug(boolean isDebug) {
         if (isDebug) {
-            options.put("-d", "");
+            options_.put("-d", "");
         } else {
-            options.remove("-d");
+            options_.remove("-d");
         }
         return this;
     }
 
     /**
-     * Directory/file to exclude from CheckStyle. The path can be the full, absolute path, or relative to the current
+     * Directory/file to exclude from Checkstyle. The path can be the full, absolute path, or relative to the current
      * path. Multiple excludes are allowed.
      *
-     * @see #sourceDir(Collection)
+     * @param path one or more paths
+     * @return the checkstyle operation
+     * @see #excludeStrings(Collection)
      */
     public CheckstyleOperation exclude(String... path) {
-        for (var p : path) {
+        return excludeStrings(List.of(path));
-            options.put("-e", p);
-        }
-        return this;
     }
 
     /**
-     * Directory/file to exclude from CheckStyle. The path can be the full, absolute path, or relative to the current
+     * Directory/file to exclude from Checkstyle. The path can be the full, absolute path, or relative to the current
      * path. Multiple excludes are allowed.
      *
-     * @see #exclude(String...)
+     * @param path one or more paths
+     * @return the checkstyle operation
+     * @see #exclude(Collection)
      */
-    public CheckstyleOperation exclude(Collection<String> paths) {
+    public CheckstyleOperation exclude(File... path) {
-        for (var p : paths) {
+        return exclude(List.of(path));
-            options.put("-e", p);
+    }
-        }
+
+    /**
+     * Directory/file to exclude from Checkstyle. The path can be the full, absolute path, or relative to the current
+     * path. Multiple excludes are allowed.
+     *
+     * @param path one or more paths
+     * @return the checkstyle operation
+     * @see #excludePaths(Collection)
+     */
+    public CheckstyleOperation exclude(Path... path) {
+        return excludePaths(List.of(path));
+    }
+
+    /**
+     * Directory/file to exclude from Checkstyle. The path can be the full, absolute path, or relative to the current
+     * path. Multiple excludes are allowed.
+     *
+     * @param paths the paths
+     * @return the checkstyle operation
+     * @see #exclude(File...)
+     */
+    public CheckstyleOperation exclude(Collection<File> paths) {
+        exclude_.addAll(paths);
         return this;
     }
 
     /**
-     * Directory/file pattern to exclude from CheckStyle. Multiple excludes are allowed.
+     * Directory/file to exclude from Checkstyle. The path can be the full, absolute path, or relative to the current
+     * path. Multiple excludes are allowed.
+     *
+     * @param paths the paths
+     * @return the checkstyle operation
+     * @see #exclude(Path...)
      */
-    public CheckstyleOperation excludedPathPattern(String pattern) {
+    public CheckstyleOperation excludePaths(Collection<Path> paths) {
-        options.put("-x", pattern);
+        return exclude(paths.stream().map(Path::toFile).toList());
+    }
+
+    /**
+     * Directory/file pattern to exclude from Checkstyle. Multiple exclude are allowed.
+     *
+     * @param regex the pattern to exclude
+     * @return the checkstyle operation
+     * @see #excludeRegex(Collection)
+     */
+    public CheckstyleOperation excludeRegex(String... regex) {
+        return excludeRegex(List.of(regex));
+    }
+
+    /**
+     * Directory/file pattern to exclude from Checkstyle. Multiple exclude are allowed.
+     *
+     * @param regex the patterns to exclude
+     * @return the checkstyle operation
+     * @see #excludeRegex(String...)
+     */
+    public CheckstyleOperation excludeRegex(Collection<String> regex) {
+        excludeRegex_.addAll(regex);
         return this;
     }
 
+    /**
+     * Directory/file to exclude from Checkstyle. The path can be the full, absolute path, or relative to the current
+     * path. Multiple excludes are allowed.
+     *
+     * @param paths the paths
+     * @return the checkstyle operation
+     * @see #exclude(String...)
+     */
+    public CheckstyleOperation excludeStrings(Collection<String> paths) {
+        return exclude(paths.stream().map(File::new).toList());
+    }
+
+    @Override
+    public void execute() throws IOException, InterruptedException, ExitStatusException {
+        if (project_ == null) {
+            if (LOGGER.isLoggable(Level.SEVERE) && !silent()) {
+                LOGGER.severe("A project must be specified.");
+            }
+            throw new ExitStatusException(ExitStatusException.EXIT_FAILURE);
+        } else {
+            super.execute();
+        }
+    }
+
     /**
      * Part of the {@link #execute} operation, constructs the command list
      * to use for building the process.
      */
     @Override
     protected List<String> executeConstructProcessCommandList() {
-        if (project_ == null) {
-            LOGGER.severe("A project must be specified.");
-        } else if (sourceDirs.isEmpty()) {
-            sourceDirs.add(project_.srcMainJavaDirectory().getPath());
-            sourceDirs.add(project_.srcTestJavaDirectory().getPath());
-        }
-
         final List<String> args = new ArrayList<>();
-        args.add(javaTool());
 
-        args.add("-cp");
+        if (project_ != null) {
-        args.add(String.format("%s:%s:%s:%s", Path.of(project_.libTestDirectory().getPath(), "*"),
+            if (sourceDir_.isEmpty()) {
-                Path.of(project_.libCompileDirectory().getPath(), "*"), project_.buildMainDirectory(),
+                sourceDir_.add(project_.srcMainJavaDirectory());
-                project_.buildTestDirectory()));
+                sourceDir_.add(project_.srcTestJavaDirectory());
-        args.add("com.puppycrawl.tools.checkstyle.Main");
-
-        options.forEach((k, v) -> {
-            args.add(k);
-            if (!v.isEmpty()) {
-                args.add(v);
             }
-        });
+            args.add(javaTool());
 
-        args.addAll(sourceDirs);
+            args.add("-cp");
+            args.add(String.format("%s%s%s%s%s%s%s", new File(project_.libTestDirectory(), "*"),
+                    File.pathSeparator, new File(project_.libCompileDirectory(), "*"), File.pathSeparator,
+                    project_.buildMainDirectory(), File.pathSeparator, project_.buildTestDirectory()));
+            args.add("com.puppycrawl.tools.checkstyle.Main");
+
+            options_.forEach((k, v) -> {
+                args.add(k);
+                if (!v.isEmpty()) {
+                    args.add(v);
+                }
+            });
+
+            if (!exclude_.isEmpty()) {
+                for (var e : exclude_) {
+                    if (e.exists()) {
+                        args.add("-e");
+                        args.add(e.getAbsolutePath());
+                    }
+                }
+            }
+
+            if (!excludeRegex_.isEmpty()) {
+                for (var e : excludeRegex_) {
+                    if (isNotBlank(e)) {
+                        args.add("-x");
+                        args.add(e);
+                    }
+                }
+            }
+
+            args.addAll(sourceDir_.stream().map(File::getAbsolutePath).toList());
+
+            if (LOGGER.isLoggable(Level.FINE)) {
+                LOGGER.log(Level.FINE, String.join(" ", args));
+            }
+        }
 
         return args;
     }
@@ -152,22 +286,31 @@ public class CheckstyleOperation extends AbstractProcessOperation<CheckstyleOper
 
     /**
      * Allows ignored modules to be run.
+     *
+     * @param isAllowIgnoreModules {@code true} or {@code false}
+     * @return the checkstyle operation
      */
     public CheckstyleOperation executeIgnoredModules(boolean isAllowIgnoreModules) {
         if (isAllowIgnoreModules) {
-            options.put("-E", "");
+            options_.put("-E", "");
         } else {
-            options.remove("-E");
+            options_.remove("-E");
         }
         return this;
     }
 
     /**
-     * Specifies the output format. Valid values: {@code xml}, {@code sarif}, {@code plain} for the XML, sarif and
+     * Specifies the output format. Valid values: {@link OutputFormat#XML},
-     * default logger respectively. Defaults to {@code plain}.
+     * {@link OutputFormat#SARIF}, {@link OutputFormat#PLAIN} for the XML, sarif and default logger
+     * respectively.
+     * <p>
+     * Defaults to {@link OutputFormat#PLAIN}.
+     *
+     * @param format the output format
+     * @return the checkstyle operation
      */
-    public CheckstyleOperation format(String format) {
+    public CheckstyleOperation format(OutputFormat format) {
-        options.put("-f", format);
+        options_.put("-f", format.label.toLowerCase());
         return this;
     }
 
@@ -175,128 +318,279 @@ public class CheckstyleOperation extends AbstractProcessOperation<CheckstyleOper
      * Generates to output a suppression xml to use to suppress all violations from user's config. Instead of printing
      * every violation, all violations will be caught and single suppressions xml file will be printed out.
      * Used only with the {@link #configurationFile(String) configurationFile} option. Output location can be specified
-     * with the {@link #output(String) output} option.
+     * with the {@link #outputPath(String) output} option.
+     *
+     * @param xPathSuppression {@code true} or {@code false}
+     * @return the checkstyle operation
      */
     public CheckstyleOperation generateXpathSuppression(boolean xPathSuppression) {
         if (xPathSuppression) {
-            options.put("-g", "");
+            options_.put("-g", "");
         } else {
-            options.remove("-g");
+            options_.remove("-g");
+        }
+        return this;
+    }
+
+    /*
+     * Determines if a string is not blank.
+     */
+    private boolean isNotBlank(String s) {
+        return s != null && !s.isBlank();
+    }
+
+    /**
+     * This option is used to print the Parse Tree of the Javadoc comment. The file has to contain only Javadoc comment
+     * content excluding '&#47;**' and '*&#47;' at the beginning and at the end respectively. It can only be used on a
+     * single file and cannot be combined with other options.
+     *
+     * @param isTree {@code true} or {@code false}
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation javadocTree(boolean isTree) {
+        if (isTree) {
+            options_.put("-j", "");
+        } else {
+            options_.remove("-j");
         }
         return this;
     }
 
     /**
-     * Prints Parse Tree of the Javadoc comment. The file have to contain <b>only Javadoc comment content</b>
+     * Returns the command line options.
-     * without including '&#47;**' and '*&#47;' at the beginning and at the end respectively. The option cannot
+     *
-     * be used other options and requires exactly one file to run on to be specified.
+     * @return the command line options
      */
-    public CheckstyleOperation javadocTree(boolean isTree) {
+    public Map<String, String> options() {
-        if (isTree) {
+        return options_;
-            options.put("-j", "");
+    }
-        } else {
+
-            options.remove("-j");
+    /**
+     * Sets the output file.
+     * <p>
+     * Defaults to stdout.
+     *
+     * @param file the output file
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation outputPath(String file) {
+        if (isNotBlank(file)) {
+            options_.put("-o", file);
         }
         return this;
     }
 
+    /**
+     * Sets the output file.
+     * <p>
+     * Defaults to stdout.
+     *
+     * @param file the output file
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation outputPath(File file) {
+        return outputPath(file.getAbsolutePath());
+    }
+
+    /**
+     * Sets the output file.
+     * <p>
+     * Defaults to stdout.
+     *
+     * @param file the output file
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation outputPath(Path file) {
+        return outputPath(file.toFile().getAbsolutePath());
+    }
+
+    /**
+     * Sets the property files to load.
+     *
+     * @param file the file
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation propertiesFile(String file) {
+        if (isNotBlank(file)) {
+            options_.put("-p", file);
+        }
+        return this;
+    }
+
+    /**
+     * Sets the property files to load.
+     *
+     * @param file the file
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation propertiesFile(File file) {
+        return propertiesFile(file.getAbsolutePath());
+    }
+
+    /**
+     * Sets the property files to load.
+     *
+     * @param file the file
+     * @return the checkstyle operation
+     */
+    public CheckstyleOperation propertiesFile(Path file) {
+        return propertiesFile(file.toFile().getAbsolutePath());
+    }
+
+    /**
+     * Specifies the file(s) or folder(s) containing the source files to check.
+     *
+     * @param dir one or more directories
+     * @return the checkstyle operation
+     * @see #sourceDirStrings(Collection)
+     */
+    public CheckstyleOperation sourceDir(String... dir) {
+        return sourceDirStrings(List.of(dir));
+    }
+
+    /**
+     * Specifies the file(s) or folder(s) containing the source files to check.
+     *
+     * @param dir one or more directories
+     * @return the checkstyle operation
+     * @see #sourceDir(Collection)
+     */
+    public CheckstyleOperation sourceDir(File... dir) {
+        return sourceDir(List.of(dir));
+    }
+
+    /**
+     * Specifies the file(s) or folder(s) containing the source files to check.
+     *
+     * @param dir one or more directories
+     * @return the checkstyle operation
+     * @see #sourceDirPaths(Collection)
+     */
+    public CheckstyleOperation sourceDir(Path... dir) {
+        return sourceDirPaths(List.of(dir));
+    }
+
+    /**
+     * Specifies the file(s) or folder(s) containing the source files to check.
+     *
+     * @param dirs the directories
+     * @return the checkstyle operation
+     * @see #sourceDir(File...)
+     */
+    public CheckstyleOperation sourceDir(Collection<File> dirs) {
+        sourceDir_.addAll(dirs);
+        return this;
+    }
+
+    /**
+     * Returns the file(s) or folders(s) containing the sources files to check
+     *
+     * @return the files or directories
+     */
+    public Set<File> sourceDir() {
+        return sourceDir_;
+    }
+
+    /**
+     * Specifies the file(s) or folder(s) containing the source files to check.
+     *
+     * @param dirs the directories
+     * @return the checkstyle operation
+     * @see #sourceDir(Path...)
+     */
+    public CheckstyleOperation sourceDirPaths(Collection<Path> dirs) {
+        return sourceDir(dirs.stream().map(Path::toFile).toList());
+    }
+
+    /**
+     * Specifies the file(s) or folder(s) containing the source files to check.
+     *
+     * @param dirs the directories
+     * @return the checkstyle operation
+     * @see #sourceDir(String...)
+     */
+    public CheckstyleOperation sourceDirStrings(Collection<String> dirs) {
+        return sourceDir(dirs.stream().map(File::new).toList());
+    }
+
     /**
      * Prints xpath suppressions at the file's line and column position. Argument is the line and column number
      * (separated by a {@code :} ) in the file that the suppression should be generated for. The option cannot be
      * used with other options and requires exactly one file to run on to be specified.
      * <p>
-     * <b>ATTENTION</b>: generated result will have few queries, joined by pipe(|). Together they will match all AST nodes
+     * Note that the generated result will have few queries, joined by pipe({@code |}). Together they will match all
-     * on specified line and column. You need to choose only one and recheck that it works. Usage of all of them is also
+     * AST nodes on specified line and column. You need to choose only one and recheck that it works. Usage of all of
-     * ok, but might result in undesirable matching and suppress other issues.
+     * them is also ok, but might result in undesirable matching and suppress other issues.
-     */
-    public CheckstyleOperation lineColumn(String lineColumn) {
-        options.put("-s", lineColumn);
-        return this;
-    }
-
-    /**
-     * Sets the output file. Defaults to stdout.
-     */
-    public CheckstyleOperation output(String file) {
-        options.put("-o", file);
-        return this;
-    }
-
-    /**
-     * Sets the property files to load.
-     */
-    public CheckstyleOperation propertiesFile(String file) {
-        options.put("-p", file);
-        return this;
-    }
-
-    /**
-     * Specified the file(s) or folder(s) containing the source files to check.
      *
-     * @see #sourceDir(Collection)
+     * @param lineColumnNumber the line column number
+     * @return the checkstyle operation
      */
-    public CheckstyleOperation sourceDir(String... dir) {
+    public CheckstyleOperation suppressionLineColumnNumber(String lineColumnNumber) {
-        sourceDirs.addAll(Arrays.asList(dir));
+        if (isNotBlank(lineColumnNumber)) {
+            options_.put("-s", lineColumnNumber);
+        }
         return this;
     }
 
     /**
-     * Specified the file(s) or folder(s) containing the source files to check.
+     * Sets the length of the tab character. Used only with the
-     *
+     * {@link #suppressionLineColumnNumber(String) suppressionLineColumnNumber} option.
-     * @see #sourceDir(String...)
+     * <p>
-     */
-    public CheckstyleOperation sourceDir(Collection<String> dirs) {
-        sourceDirs.addAll(dirs);
-        return this;
-    }
-
-    /**
-     * Sets the length of the tab character. Used only with the {@link #lineColumn(String) lineColum} option.
      * Default value is {@code 8}.
+     *
+     * @param length the length
+     * @return the checkstyle operation
      */
     public CheckstyleOperation tabWith(int length) {
-        options.put("-w", String.valueOf(length));
+        options_.put("-w", String.valueOf(length));
         return this;
     }
 
     /**
-     * Prints Abstract Syntax Tree(AST) of the checked file. The option cannot be used other options and requires
+     * This option is used to display the Abstract Syntax Tree (AST) without any comments of the specified file. It can
-     * exactly one file to run on to be specified.
+     * only be used on a single file and cannot be combined with other options.
+     *
+     * @param isTree {@code true} or {@code false}
+     * @return the checkstyle operation
      */
     public CheckstyleOperation tree(boolean isTree) {
         if (isTree) {
-            options.put("-t", "");
+            options_.put("-t", "");
         } else {
-            options.remove("-t");
+            options_.remove("-t");
         }
         return this;
     }
 
     /**
-     * Prints Abstract Syntax Tree(AST) with comment nodes of the checked file. The option cannot be used with other
+     * This option is used to display the Abstract Syntax Tree (AST) with comment nodes excluding Javadoc of the
-     * options and requires exactly one file to run on to be specified.
+     * specified file. It can only be used on a single file and cannot be combined with other options.
+     *
+     * @param isTree {@code true} or {@code false}
+     * @return the checkstyle operation
      */
     public CheckstyleOperation treeWithComments(boolean isTree) {
         if (isTree) {
-            options.put("-T", "");
+            options_.put("-T", "");
         } else {
-            options.remove("-T");
+            options_.remove("-T");
         }
         return this;
     }
 
     /**
-     * Prints Abstract Syntax Tree(AST) with Javadoc nodes and comment nodes of the checked file. Attention that line
+     * This option is used to display the Abstract Syntax Tree (AST) with Javadoc nodes of the specified file. It can
-     * number and columns will not be the same as it is a file due to the fact that each javadoc comment is parsed
+     * only be used on a single file and cannot be combined with other options.
-     * separately from java file. The option cannot be used with other options and requires exactly one file to run on
+     *
-     * to be specified.
+     * @param isTree {@code true} or {@code false}
+     * @return the checkstyle operation
      */
     public CheckstyleOperation treeWithJavadoc(boolean isTree) {
         if (isTree) {
-            options.put("-J", "");
+            options_.put("-J", "");
         } else {
-            options.remove("-J");
+            options_.remove("-J");
         }
         return this;
     }
-}
+}

src/main/java/rife/bld/extension/checkstyle/OutputFormat.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2023-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package rife.bld.extension.checkstyle;
+
+/**
+ * The Checkstyle output format for XML, sarif and default (plain) logger.
+ */
+public enum OutputFormat {
+    XML("xml"),
+    SARIF("sarif"),
+    PLAIN("plain");
+
+    public final String label;
+
+    /**
+     * Sets the label of this output format.
+     */
+    OutputFormat(String label) {
+        this.label = label;
+    }
+}

src/test/java/rife/bld/extension/CheckstyleOperationTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023 the original author or authors.
+ * Copyright 2023-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,58 +16,150 @@
 
 package rife.bld.extension;
 
+import org.assertj.core.api.AutoCloseableSoftAssertions;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledOnOs;
+import org.junit.jupiter.api.condition.OS;
 import rife.bld.BaseProject;
 import rife.bld.Project;
 import rife.bld.WebProject;
+import rife.bld.extension.checkstyle.OutputFormat;
 import rife.bld.operations.exceptions.ExitStatusException;
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.List;
+import java.util.logging.ConsoleHandler;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatCode;
 
-
 class CheckstyleOperationTest {
+    public static final String SRC_MAIN_JAVA = "src/main/java";
+    public static final String SRC_TEST_JAVA = "src/test/java";
     private static final String ADD = "add";
     private static final String BAR = "bar";
     private static final String FOO = "foo";
     private static final String REMOVE = "remove";
 
+    @BeforeAll
+    static void beforeAll() {
+        var level = Level.ALL;
+        var logger = Logger.getLogger("rife.bld.extension");
+        var consoleHandler = new ConsoleHandler();
+        consoleHandler.setLevel(level);
+        logger.addHandler(consoleHandler);
+        logger.setLevel(level);
+        logger.setUseParentHandlers(false);
+    }
+
+
     @Test
     void branchMatchingXpath() {
         var op = new CheckstyleOperation().fromProject(new Project()).branchMatchingXpath(FOO);
-        assertThat(op.options.get("-b")).isEqualTo(FOO);
+        assertThat(op.options().get("-b")).isEqualTo(FOO);
+    }
+
+    @Test
+    @EnabledOnOs(OS.LINUX)
+    void checkAllParameters() throws IOException {
+        var args = Files.readAllLines(Paths.get("src", "test", "resources", "checkstyle-args.txt"));
+
+        assertThat(args).isNotEmpty();
+
+        var params = new CheckstyleOperation()
+                .fromProject(new Project())
+                .branchMatchingXpath("xpath")
+                .debug(true)
+                .configurationFile(new File("config"))
+                .exclude(SRC_MAIN_JAVA)
+                .excludeRegex("regex")
+                .executeIgnoredModules(true)
+                .format(OutputFormat.XML)
+                .generateXpathSuppression(true)
+                .javadocTree(true)
+                .outputPath(new File("optionPath"))
+                .propertiesFile(new File("properties"))
+                .suppressionLineColumnNumber("12")
+                .tabWith(1)
+                .tree(true)
+                .treeWithComments(true)
+                .treeWithJavadoc(true)
+                .executeConstructProcessCommandList();
+
+        try (var softly = new AutoCloseableSoftAssertions()) {
+            for (var p : args) {
+                var found = false;
+                for (var a : params) {
+                    if (a.startsWith(p)) {
+                        found = true;
+                        break;
+                    }
+                }
+                softly.assertThat(found).as(p + " not found.").isTrue();
+            }
+        }
     }
 
     @Test
     void configurationFile() {
         var op = new CheckstyleOperation().fromProject(new Project()).configurationFile(FOO);
-        assertThat(op.options.get("-c")).isEqualTo(FOO);
+        assertThat(op.options().get("-c")).isEqualTo(FOO);
     }
 
     @Test
     void debug() {
         var op = new CheckstyleOperation().fromProject(new Project()).debug(true);
-        assertThat(op.options.containsKey("-d")).as(ADD).isTrue();
+        assertThat(op.options().containsKey("-d")).as(ADD).isTrue();
         op = op.debug(false);
-        assertThat(op.options.containsKey("-d")).as(REMOVE).isFalse();
+        assertThat(op.options().containsKey("-d")).as(REMOVE).isFalse();
     }
 
     @Test
     void exclude() {
-        var op = new CheckstyleOperation().fromProject(new Project()).exclude(FOO);
+        var foo = new File(SRC_MAIN_JAVA);
-        assertThat(op.options.get("-e")).isEqualTo(FOO);
+        var bar = new File(SRC_TEST_JAVA);
-        op = new CheckstyleOperation().fromProject(new Project()).exclude(List.of(FOO));
+        var e = "-e ";
-        assertThat(op.options.get("-e")).as("as list").isEqualTo(FOO);
+
+        var op = new CheckstyleOperation().fromProject(new Project()).exclude(SRC_MAIN_JAVA, SRC_TEST_JAVA);
+        assertThat(String.join(" ", op.executeConstructProcessCommandList())).as("String...")
+                .contains(e + foo.getAbsolutePath()).contains(e + bar.getAbsolutePath());
+
+        op = new CheckstyleOperation().fromProject(new Project()).excludeStrings(List.of(SRC_MAIN_JAVA, SRC_TEST_JAVA));
+        assertThat(String.join(" ", op.executeConstructProcessCommandList())).as("List(String...)")
+                .contains(e + foo.getAbsolutePath()).contains(e + bar.getAbsolutePath());
+
+        op = new CheckstyleOperation().fromProject(new Project()).exclude(foo, bar);
+        assertThat(String.join(" ", op.executeConstructProcessCommandList())).as("File...")
+                .contains(e + foo.getAbsolutePath()).contains(e + bar.getAbsolutePath());
+
+        op = new CheckstyleOperation().fromProject(new Project()).exclude(List.of(foo, bar));
+        assertThat(String.join(" ", op.executeConstructProcessCommandList())).as("List(File...)")
+                .contains(e + foo.getAbsolutePath()).contains(e + bar.getAbsolutePath());
+
+        op = new CheckstyleOperation().fromProject(new Project()).exclude(foo.toPath(), bar.toPath());
+        assertThat(String.join(" ", op.executeConstructProcessCommandList())).as("Path...")
+                .contains(e + foo.getAbsolutePath()).contains(e + bar.getAbsolutePath());
+
+        op = new CheckstyleOperation().fromProject(new Project()).excludePaths(List.of(foo.toPath(), bar.toPath()));
+        assertThat(String.join(" ", op.executeConstructProcessCommandList())).as("List(Path...)")
+                .contains(e + foo.getAbsolutePath()).contains(e + bar.getAbsolutePath());
     }
 
     @Test
-    void excludedPathPattern() {
+    void excludeRegex() {
-        var op = new CheckstyleOperation().fromProject(new Project()).excludedPathPattern(FOO);
+        var op = new CheckstyleOperation().fromProject(new Project()).excludeRegex(FOO, BAR);
-        assertThat(op.options.get("-x")).isEqualTo(FOO);
+        var x = "-x ";
+        assertThat(String.join(" ", op.executeConstructProcessCommandList())).contains(x + FOO, x + BAR);
+
+        op = new CheckstyleOperation().fromProject(new Project()).excludeRegex(List.of(FOO, BAR));
+        assertThat(String.join(" ", op.executeConstructProcessCommandList())).as("as list").contains(x + FOO, x + BAR);
     }
 
     @Test
@@ -76,9 +168,9 @@ class CheckstyleOperationTest {
         tmpFile.deleteOnExit();
         var op = new CheckstyleOperation()
                 .fromProject(new WebProject())
-                .sourceDir("src/main/java", "src/test/java")
+                .sourceDir(SRC_MAIN_JAVA, SRC_TEST_JAVA)
-                .configurationFile("src/test/resources/google_checks.xml")
+                .configurationFile(Path.of("src/test/resources/google_checks.xml"))
-                .output(tmpFile.getAbsolutePath());
+                .outputPath(tmpFile.toPath());
         op.execute();
         assertThat(tmpFile).exists();
     }
@@ -91,7 +183,7 @@ class CheckstyleOperationTest {
                 .propertiesFile("config/checkstyle.properties")
                 .debug(true)
                 .executeIgnoredModules(true)
-                .sourceDir("src/main/java", "src/test/java");
+                .sourceDir(SRC_MAIN_JAVA, SRC_TEST_JAVA);
         assertThat(String.join(" ", op.executeConstructProcessCommandList()))
                 .startsWith("java -cp ")
                 .endsWith(
@@ -100,15 +192,22 @@ class CheckstyleOperationTest {
                                 "-b xpath " +
                                 "-c config/checkstyle.xml " +
                                 "-d -E " +
-                                "src/main/java src/test/java");
+                                new File(SRC_MAIN_JAVA).getAbsolutePath() + " " +
+                                new File(SRC_TEST_JAVA).getAbsolutePath());
     }
 
     @Test
     void executeIgnoredModules() {
         var op = new CheckstyleOperation().fromProject(new Project()).executeIgnoredModules(true);
-        assertThat(op.options.containsKey("-E")).as(ADD).isTrue();
+        assertThat(op.options().containsKey("-E")).as(ADD).isTrue();
         op = op.executeIgnoredModules(false);
-        assertThat(op.options.containsKey("-E")).as(REMOVE).isFalse();
+        assertThat(op.options().containsKey("-E")).as(REMOVE).isFalse();
+    }
+
+    @Test
+    void executeNoProject() {
+        var op = new CheckstyleOperation();
+        assertThatCode(op::execute).isInstanceOf(ExitStatusException.class);
     }
 
     @Test
@@ -117,88 +216,115 @@ class CheckstyleOperationTest {
         tmpFile.deleteOnExit();
         var op = new CheckstyleOperation()
                 .fromProject(new WebProject())
-                .sourceDir(List.of("src/main/java", "src/test/java"))
+                .sourceDir(SRC_MAIN_JAVA, SRC_TEST_JAVA)
                 .configurationFile("src/test/resources/sun_checks.xml")
-                .output(tmpFile.getAbsolutePath());
+                .outputPath(tmpFile.getAbsolutePath());
         assertThatCode(op::execute).isInstanceOf(ExitStatusException.class);
         assertThat(tmpFile).exists();
     }
 
     @Test
     void format() {
-        var op = new CheckstyleOperation().fromProject(new Project()).format(FOO);
+        var op = new CheckstyleOperation().fromProject(new Project()).format(OutputFormat.XML);
-        assertThat(op.options.get("-f")).isEqualTo(FOO);
+        assertThat(op.options().get("-f")).isEqualTo("xml");
     }
 
     @Test
     void generateXpathSuppression() {
         var op = new CheckstyleOperation().fromProject(new Project()).generateXpathSuppression(true);
-        assertThat(op.options.containsKey("-g")).as(ADD).isTrue();
+        assertThat(op.options().containsKey("-g")).as(ADD).isTrue();
         op = op.generateXpathSuppression(false);
-        assertThat(op.options.containsKey("-g")).as(REMOVE).isFalse();
+        assertThat(op.options().containsKey("-g")).as(REMOVE).isFalse();
     }
 
     @Test
     void javadocTree() {
         var op = new CheckstyleOperation().fromProject(new Project()).javadocTree(true);
-        assertThat(op.options.containsKey("-j")).as(ADD).isTrue();
+        assertThat(op.options().containsKey("-j")).as(ADD).isTrue();
         op = op.javadocTree(false);
-        assertThat(op.options.containsKey("-j")).as(REMOVE).isFalse();
+        assertThat(op.options().containsKey("-j")).as(REMOVE).isFalse();
     }
 
     @Test
-    void lineColumn() {
+    void outputPath() {
-        var op = new CheckstyleOperation().fromProject(new Project()).lineColumn(FOO);
+        var op = new CheckstyleOperation().fromProject(new Project()).outputPath(FOO);
-        assertThat(op.options.get("-s")).isEqualTo(FOO);
+        assertThat(op.options().get("-o")).isEqualTo(FOO);
-    }
-
-    @Test
-    void output() {
-        var op = new CheckstyleOperation().fromProject(new Project()).output(FOO);
-        assertThat(op.options.get("-o")).isEqualTo(FOO);
     }
 
     @Test
     void propertiesFile() {
         var op = new CheckstyleOperation().fromProject(new Project()).propertiesFile(FOO);
-        assertThat(op.options.get("-p")).isEqualTo(FOO);
+        assertThat(op.options().get("-p")).isEqualTo(FOO);
+
+        var fooPath = Path.of(FOO);
+        op = op.propertiesFile(fooPath);
+        assertThat(op.options().get("-p")).isEqualTo(fooPath.toFile().getAbsolutePath());
     }
 
     @Test
     void sourceDir() {
-        var op = new CheckstyleOperation().fromProject(new Project()).sourceDir(FOO);
+        var foo = new File(FOO);
-        assertThat(op.sourceDirs).contains(FOO);
+        var bar = new File(BAR);
-        op = op.sourceDir(FOO, BAR);
+
-        assertThat(op.sourceDirs).as("foo, bar").hasSize(2).contains(FOO).contains(BAR);
+        var op = new CheckstyleOperation().fromProject(new Project()).sourceDir(FOO, BAR);
+        assertThat(op.sourceDir()).as("String...").hasSize(2).contains(foo, bar);
+        op.sourceDir().clear();
+
+        op = op.sourceDirStrings(List.of(FOO, BAR));
+        assertThat(op.sourceDir()).as("List(String...)").hasSize(2).contains(foo, bar);
+        op.sourceDir().clear();
+
+        op = op.sourceDir(foo, bar);
+        assertThat(op.sourceDir()).as("File...").hasSize(2).contains(foo, bar);
+        op.sourceDir().clear();
+
+        op = op.sourceDir(List.of(foo, bar));
+        assertThat(op.sourceDir()).as("List(File...)").hasSize(2).contains(foo, bar);
+        op.sourceDir().clear();
+
+        op = op.sourceDir(foo.toPath(), bar.toPath());
+        assertThat(op.sourceDir()).as("Path...").hasSize(2).contains(foo, bar);
+        op.sourceDir().clear();
+
+        op = op.sourceDirPaths(List.of(foo.toPath(), bar.toPath()));
+        assertThat(op.sourceDir()).as("List(Path...)").hasSize(2).contains(foo, bar);
+        op.sourceDir().clear();
+    }
+
+
+    @Test
+    void suppressionLineColumnNumber() {
+        var op = new CheckstyleOperation().fromProject(new Project()).suppressionLineColumnNumber(FOO + ':' + BAR);
+        assertThat(op.options().get("-s")).isEqualTo(FOO + ':' + BAR);
     }
 
     @Test
     void tabWith() {
         var op = new CheckstyleOperation().fromProject(new Project()).tabWith(9);
-        assertThat(op.options.get("-w")).isEqualTo("9");
+        assertThat(op.options().get("-w")).isEqualTo("9");
     }
 
     @Test
     void tree() {
         var op = new CheckstyleOperation().fromProject(new Project()).tree(true);
-        assertThat(op.options.containsKey("-t")).as(ADD).isTrue();
+        assertThat(op.options().containsKey("-t")).as(ADD).isTrue();
         op = op.tree(false);
-        assertThat(op.options.containsKey("-t")).as(REMOVE).isFalse();
+        assertThat(op.options().containsKey("-t")).as(REMOVE).isFalse();
     }
 
     @Test
     void treeWithComments() {
         var op = new CheckstyleOperation().fromProject(new Project()).treeWithComments(true);
-        assertThat(op.options.containsKey("-T")).as(ADD).isTrue();
+        assertThat(op.options().containsKey("-T")).as(ADD).isTrue();
         op = op.treeWithComments(false);
-        assertThat(op.options.containsKey("-T")).as(REMOVE).isFalse();
+        assertThat(op.options().containsKey("-T")).as(REMOVE).isFalse();
     }
 
     @Test
     void treeWithJavadoc() {
         var op = new CheckstyleOperation().fromProject(new Project()).treeWithJavadoc(true);
-        assertThat(op.options.containsKey("-J")).as(ADD).isTrue();
+        assertThat(op.options().containsKey("-J")).as(ADD).isTrue();
         op = op.treeWithJavadoc(false);
-        assertThat(op.options.containsKey("-J")).as(REMOVE).isFalse();
+        assertThat(op.options().containsKey("-J")).as(REMOVE).isFalse();
     }
-}
+}

src/test/resources/checkstyle-args.txt

@@ -0,0 +1,16 @@
+-b
+-c
+-d
+-e
+-E
+-f
+-g
+-j
+-J
+-o
+-p
+-s
+-t
+-T
+-w
+-x