Make picocli fully handle config validation

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/Main.java

@@ -1,6 +1,7 @@
 package at.pcgamingfreaks.mkvaudiosubtitlechanger;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validation.ValidationExecutionStrategy;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.CachedMkvFileProcessor;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.kernel.AttributeUpdaterKernel;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.kernel.CoherentAttributeUpdaterKernel;
@@ -35,7 +36,10 @@ public class Main implements Runnable {
         if (args.length == 0) {
             args = new String[] { "--help" };
         }
-        new CommandLine(Main.class).execute(args);
+
+        new CommandLine(Main.class)
+                .setExecutionStrategy(new ValidationExecutionStrategy())
+                .execute(args);
     }
 
     @Override

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/InputConfig.java

@@ -4,6 +4,7 @@ import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validation.ValidFile;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validation.ValidMkvToolNix;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.AttributeConfig;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.MkvToolNix;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.util.FileUtils;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.util.ValidationUtil;
 import jakarta.validation.ConstraintViolation;
 import jakarta.validation.Validator;
@@ -108,20 +109,6 @@ public class InputConfig {
 
     public static void setInstance(InputConfig c) {
         config = c;
-        validate();
-    }
-
-    private static void validate() {
-        Validator validator = ValidationUtil.getValidator();
-        Set<ConstraintViolation<InputConfig>> violations = validator.validate(config);
-
-        if (!violations.isEmpty()) {
-            StringBuilder errors = new StringBuilder();
-            for (ConstraintViolation<InputConfig> violation : violations) {
-                errors.append(violation.getPropertyPath()).append(" ").append(violation.getMessage()).append("\n");
-            }
-            throw new CommandLine.ParameterException(config.getSpec().commandLine(), errors.toString());
-        }
     }
 
     /**
@@ -129,13 +116,7 @@ public class InputConfig {
      * @return absolute path to desired application.
      */
     public String getPathFor(MkvToolNix application) {
-        return mkvToolNix.getAbsolutePath().endsWith("/")
-                ? mkvToolNix.getAbsolutePath() + application
-                : mkvToolNix.getAbsolutePath() + "/" + application;
-    }
-
-    public String getPathFor(MkvToolNix application, boolean isWindows) {
-        return getPathFor(application) + (isWindows ? ".exe" : "");
+        return FileUtils.getPathFor(mkvToolNix, application).getAbsolutePath();
     }
 
     public String getNormalizedLibraryPath() {

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validation/ValidMkvToolNixValidator.java

@@ -1,14 +1,12 @@
 package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validation;
 
-import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.MkvToolNix;
 import jakarta.validation.ConstraintValidator;
 import jakarta.validation.ConstraintValidatorContext;
-import org.apache.commons.lang3.SystemUtils;
-
 
 import java.io.File;
-import java.nio.file.Path;
+
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.util.FileUtils.getPathFor;
 
 public class ValidMkvToolNixValidator implements ConstraintValidator<ValidMkvToolNix, File> {
     @Override
@@ -18,7 +16,9 @@ public class ValidMkvToolNixValidator implements ConstraintValidator<ValidMkvToo
     @Override
     public boolean isValid(File file, ConstraintValidatorContext context) {
         return file != null && file.exists()
-                && Path.of(InputConfig.getInstance().getPathFor(MkvToolNix.MKV_MERGE, SystemUtils.IS_OS_WINDOWS)).toFile().exists()
-                && Path.of(InputConfig.getInstance().getPathFor(MkvToolNix.MKV_PROP_EDIT, SystemUtils.IS_OS_WINDOWS)).toFile().exists();
+                && getPathFor(file, MkvToolNix.MKV_MERGE).exists()
+                && getPathFor(file, MkvToolNix.MKV_PROP_EDIT).exists();
     }
+
+
 }

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/validation/ValidationExecutionStrategy.java

@@ -0,0 +1,31 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validation;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.util.ValidationUtil;
+import jakarta.validation.ConstraintViolation;
+import jakarta.validation.Validator;
+import picocli.CommandLine;
+
+import java.util.Set;
+
+public class ValidationExecutionStrategy implements CommandLine.IExecutionStrategy {
+
+    public int execute(CommandLine.ParseResult parseResult) {
+        validate(parseResult.commandSpec());
+        return new CommandLine.RunLast().execute(parseResult); // default execution strategy
+    }
+
+    private static void validate(CommandLine.Model.CommandSpec spec) {
+        Validator validator = ValidationUtil.getValidator();
+        Set<ConstraintViolation<InputConfig>> violations = validator.validate(((Main)spec.userObject()).getConfig());
+
+        if (!violations.isEmpty()) {
+            StringBuilder errors = new StringBuilder();
+            for (ConstraintViolation<InputConfig> violation : violations) {
+                errors.append(violation.getPropertyPath()).append(" ").append(violation.getMessage()).append("\n");
+            }
+            throw new CommandLine.ParameterException(spec.commandLine(), errors.toString());
+        }
+    }
+}

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/util/FileUtils.java

@@ -0,0 +1,21 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.util;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.MkvToolNix;
+import org.apache.commons.lang3.SystemUtils;
+
+import java.io.File;
+import java.nio.file.Path;
+
+public class FileUtils {
+    private static final boolean isWindows = SystemUtils.IS_OS_WINDOWS;
+
+    private static String expandPath(File dir, MkvToolNix application) {
+        return dir.getAbsolutePath().endsWith("/")
+                ? dir.getAbsolutePath() + application
+                : dir.getAbsolutePath() + "/" + application;
+    }
+
+    public static File getPathFor(File dir, MkvToolNix application) {
+        return Path.of(expandPath(dir, application) + (isWindows ? ".exe" : "")).toFile();
+    }
+}

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/InputConfigTest.java

@@ -1,15 +1,25 @@
 package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
 
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.validation.ValidationExecutionStrategy;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.AttributeConfig;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
 import picocli.CommandLine;
 
+import java.io.PrintWriter;
+import java.io.StringWriter;
 import java.util.List;
+import java.util.stream.Stream;
 
 import static at.pcgamingfreaks.mkvaudiosubtitlechanger.util.PathUtils.TEST_FILE;
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.util.TestUtil.args;
 import static org.junit.jupiter.api.Assertions.*;
 
-class ConfigTest {
+class InputConfigTest {
+    private static final String TEST_INVALID_DIR = "src/test/resources/test-dir";
 
     @Test
     void initConfig() {
@@ -42,4 +52,31 @@ class ConfigTest {
 
         assertNull(InputConfig.getInstance().getConfigPath());
     }
+
+
+    private static Stream<Arguments> jakartaValidationData() {
+        return Stream.of(
+            Arguments.of(new String[]{"-l", "/arstarstarst", "-a", "jpn:ger"}, "libraryPath does not exist"),
+            Arguments.of(args("-m", TEST_INVALID_DIR), "mkvToolNix does not exist"),
+            Arguments.of(args("-t", "0"), "threads must be greater than or equal to 1"),
+            Arguments.of(args("-t", "-1"), "threads must be greater than or equal to 1"),
+            Arguments.of(args("-c", "-1"), "coherent must be greater than or equal to 0")
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("jakartaValidationData")
+    void testJakartaValidation(String[] args, String expectedMessage) {
+        InputConfig.getInstance(true);
+        StringWriter writer = new StringWriter();
+        PrintWriter printWriter = new PrintWriter(writer);
+
+        new CommandLine(Main.class)
+                .setExecutionStrategy(new ValidationExecutionStrategy())
+                .setErr(printWriter)
+                .execute(args);
+
+        printWriter.flush();
+        assertTrue(writer.toString().contains(expectedMessage));
+    }
 }

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/fields/AttributeConfigTest.java

@@ -1,4 +1,4 @@
-package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.fields;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.AttributeConfig;

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/fields/BooleanConfigParameterTest.java

@@ -1,6 +1,7 @@
-package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.fields;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/fields/IntegerConfigParameterTest.java

@@ -1,6 +1,7 @@
-package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.fields;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
@@ -38,13 +39,5 @@ class IntegerConfigParameterTest {
         Main sut = new Main();
         assertThrows(CommandLine.MissingParameterException.class, () -> CommandLine.populateCommand(sut, args("-t")));
         assertThrows(CommandLine.MissingParameterException.class, () -> CommandLine.populateCommand(sut, args("--threads")));
-
-        StringWriter writer = new StringWriter();
-        PrintWriter printWriter = new PrintWriter(writer);
-        CommandLine underTest = new  CommandLine(sut);
-        underTest = underTest.setErr(printWriter);
-        underTest.execute(args("-t", "0"));
-        printWriter.flush();
-        assertTrue(writer.toString().contains("threads must be greater than or equal to 1"));
     }
 }

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/fields/MkvToolNixPathConfigParameterTest.java

@@ -1,6 +1,7 @@
-package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.fields;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
 import org.apache.commons.lang3.SystemUtils;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -18,7 +19,6 @@ import static org.junit.jupiter.api.Assertions.*;
 
 class MkvToolNixPathConfigParameterTest {
 
-    private static final String TEST_INVALID_DIR = "src/test/resources/test-dir";
     private static final String TEST_MKVTOOLNIX_DIR = SystemUtils.IS_OS_WINDOWS ? "src/test/resources/mkvtoolnix_exe" : "src/test/resources/mkvtoolnix";
 
     private static Stream<Arguments> provideTestCases() {
@@ -39,7 +39,6 @@ class MkvToolNixPathConfigParameterTest {
     @Test
     void validate() {
         Main sut = new Main();
-//        assertThrows(CommandLine.ParameterException.class, () -> new CommandLine(sut).execute(args("-m", TEST_INVALID_DIR)));
         assertThrows(CommandLine.ParameterException.class, () -> CommandLine.populateCommand(sut, args("-m")));
         assertThrows(CommandLine.ParameterException.class, () -> CommandLine.populateCommand(sut, args("")));
     }

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/fields/PathConfigParameterTest.java

@@ -1,6 +1,7 @@
-package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.fields;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/fields/PatternConfigParameterTest.java

@@ -1,6 +1,7 @@
-package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.fields;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;

src/test/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/fields/SetConfigParameterTest.java

@@ -1,6 +1,7 @@
-package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.config.fields;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.config.InputConfig;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;