Add windows batch file 'ktlint.bat' to published files (#2059)

Closes #1986

ktlint-cli/build.gradle.kts

diff --git a/ktlint-cli/build.gradle.kts b/ktlint-cli/build.gradle.kts
index 3afaf35..e869545 100644
--- a/ktlint-cli/build.gradle.kts
+++ b/ktlint-cli/build.gradle.kts
@@ -48,6 +48,8 @@
 
     dependsOn(tasks.shadowJar)
 
+    val isReleaseBuild = !version.toString().endsWith("SNAPSHOT")
+
     // Find the "ktlint-cli-<version>-all.jar" file
     val ktlintCliAllJarFile =
         tasks
@@ -60,17 +62,25 @@
     logger.lifecycle("ktlint-cli: Base jar to build self-executable file: ${ktlintCliAllJarFile.absolutePath}")
     inputs.files(ktlintCliAllJarFile)
 
+    val windowsBatchFileInputPath = "$projectDir/src/main/scripts/ktlint.bat"
+    inputs.files(windowsBatchFileInputPath)
+
     // Output is the self-executable file
-    val selfExecutableKtlintPath = "$buildDir/run/ktlint"
-    outputs.files(selfExecutableKtlintPath)
-    if (!version.toString().endsWith("SNAPSHOT")) {
-        // And for releases also the signature file
-        outputs.files("$buildDir/run/ktlint.asc")
+    val outputDirectoryPath = "$buildDir/run"
+    val selfExecutableKtlintOutputPath = "$outputDirectoryPath/ktlint"
+    val selfExecutableKtlintSignatureOutputPath = "$outputDirectoryPath/ktlint.asc"
+    val windowsBatchFileOutputPath = "$outputDirectoryPath/ktlint.bat"
+    outputs.files(selfExecutableKtlintOutputPath)
+    if (isReleaseBuild) {
+        // And for releases also the signature file and a batch file for Windows OS
+        outputs.files(selfExecutableKtlintSignatureOutputPath)
+        outputs.files(windowsBatchFileOutputPath)
     }
 
     doLast {
-        logger.lifecycle("Creating the self-executable ktlint-cli")
-        File(selfExecutableKtlintPath).apply {
+        File(selfExecutableKtlintOutputPath).apply {
+            logger.lifecycle("Creating the self-executable file: $selfExecutableKtlintOutputPath")
+
             // writeText effective replaces the entire content if the file already exists. If appendText is used, the file keeps on growing
             // with each build if the clean target is not used.
             writeText(
@@ -95,11 +105,18 @@
 
             setExecutable(true, false)
 
-            if (!version.toString().endsWith("SNAPSHOT")) {
+            if (isReleaseBuild) {
+                logger.lifecycle("Creating the signature file: $selfExecutableKtlintSignatureOutputPath")
                 signing.sign(this)
             }
         }
-        logger.lifecycle("Finished creating the self-executable ktlint-cli")
+        if (isReleaseBuild) {
+            logger.lifecycle("Creating the batch file for Windows OS: $windowsBatchFileOutputPath")
+            File(windowsBatchFileOutputPath).apply {
+                writeText(File(windowsBatchFileInputPath).readText())
+            }
+        }
+        logger.lifecycle("Finished creating output files ktlint-cli")
     }
 }
 

ktlint-cli/src/main/scripts/ktlint.bat

diff --git a/ktlint-cli/src/main/scripts/ktlint.bat b/ktlint-cli/src/main/scripts/ktlint.bat
new file mode 100644
index 0000000..882536b
--- /dev/null
+++ b/ktlint-cli/src/main/scripts/ktlint.bat
@@ -0,0 +1,7 @@
+@echo off
+REM By default this batch file and the "ktlint.jar" are located in same directory. Please adjust path below when this batch
+REM file and the jar file are located in different directories.
+if not defined JAR_PATH set JAR_PATH=.\ktlint.jar
+
+REM The --add-opens argument is needed for java 16+ (see https://github.com/pinterest/ktlint/issues/1986)
+java --add-opens=java.base/java.lang=ALL-UNNAMED -jar "%JAR_PATH%" %*