Use modern API to get property values

https://docs.gradle.org/8.5/userguide/build_environment.html#configuring_your_build_environment

gradle/build-scans.gradle

@@ -1,24 +1,27 @@
 File acceptFile = new File(gradle.gradleUserHomeDir, "build-scans/spotless/gradle-scans-license-agree.txt")
 acceptFile.parentFile.mkdirs()
-def env = System.getenv()
-boolean isCI = env.CI || env.TRAVIS
-boolean hasAccepted = isCI || env.SPOTLESS_GRADLE_SCANS_ACCEPT=='yes' || acceptFile.exists() && acceptFile.text.trim() == 'yes'
-boolean hasRefused = env.SPOTLESS_GRADLE_SCANS_ACCEPT=='no' || acceptFile.exists() && acceptFile.text.trim() == 'no'
+
+def env(String key) {
+	return providers.environmentVariable(key).orNull
+}
+boolean isCI = env('CI') != null
+boolean hasAccepted = isCI || env('SPOTLESS_GRADLE_SCANS_ACCEPT') =='yes' || acceptFile.exists() && acceptFile.text.trim() == 'yes'
+boolean hasRefused = env('SPOTLESS_GRADLE_SCANS_ACCEPT') =='no' || acceptFile.exists() && acceptFile.text.trim() == 'no'
 
 buildScan {
 	if (hasAccepted) {
 		termsOfServiceAgree = 'yes'
 	} else if (!hasRefused) {
 		gradle.buildFinished {
 			println """
-This build uses Gradle Build Scans to gather statistics, share information about 
+This build uses Gradle Build Scans to gather statistics, share information about
 failures, environmental issues, dependencies resolved during the build and more.
-Build scans will be published after each build, if you accept the terms of 
+Build scans will be published after each build, if you accept the terms of
 service, and in particular the privacy policy.
 
-Please read 
-   
-    https://gradle.com/terms-of-service 
+Please read
+
+    https://gradle.com/terms-of-service
     https://gradle.com/legal/privacy
 
 and then:
@@ -32,7 +35,7 @@ and then:
 
     echo 'no' >> ${acceptFile}
 
-And we'll not bother you again. Note that build scans are only made public if 
+And we'll not bother you again. Note that build scans are only made public if
 you share the URL at the end of the build.
 """
 		}

gradle/changelog.gradle

@@ -43,7 +43,7 @@ if (project == rootProject) {
 			if (isPlugin) {
 				// make sure there aren't any unreleased changes in lib
 				if (!rootProject.spotlessChangelog.parsedChangelog.noUnreleasedChanges()) {
-					if (!("true".equals(rootProject.findProperty('ignoreUnreleasedLib')))) {
+					if (!("true" == rootProject.providers.gradleProperty('ignoreUnreleasedLib').orNull)) {
 						throw new IllegalArgumentException(
 						"You're going to publish ${changelogPushTasks[0]}, but there are unreleased features in lib!\n" +
 						"You should run :changelogPush first!  Else you'll be missing out on:\n" +

gradle/java-publish.gradle

@@ -1,7 +1,9 @@
-import java.nio.charset.StandardCharsets
+def env(String key) {
+	return providers.environmentVariable(key).orNull
+}
 
 def decode64(String varName) {
-	String envValue = System.env[varName]
+	String envValue = env(varName)
 	if (envValue == null) {
 		return ""
 	} else {
@@ -11,7 +13,7 @@ def decode64(String varName) {
 
 if (project.parent == null) {
 	group = 'com.diffplug.spotless'
-	def pass = System.env['ORG_GRADLE_PROJECT_nexus_pass64']
+	def pass = env('ORG_GRADLE_PROJECT_nexus_pass64')
 	if (pass != null) {
 		pass = pass.decodeBase64()
 	}
@@ -22,7 +24,7 @@ if (project.parent == null) {
 			sonatype {
 				nexusUrl.set(uri("https://s01.oss.sonatype.org/service/local/"))
 				snapshotRepositoryUrl.set(uri("https://s01.oss.sonatype.org/content/repositories/snapshots/"))
-				username = System.env['ORG_GRADLE_PROJECT_nexus_user']
+				username = env('ORG_GRADLE_PROJECT_nexus_user')
 				password = decode64('ORG_GRADLE_PROJECT_nexus_pass64')
 			}
 		}
@@ -169,14 +171,14 @@ model {
 	}
 }
 
-if (System.env['JITPACK'] == 'true' || version.endsWith('-SNAPSHOT')) {
+if (env('JITPACK') == 'true' || version.endsWith('-SNAPSHOT')) {
 	signing {
 		setRequired(false)
 	}
 } else {
 	signing {
 		String gpg_key = decode64('ORG_GRADLE_PROJECT_gpg_key64')
-		useInMemoryPgpKeys(gpg_key, System.env['ORG_GRADLE_PROJECT_gpg_passphrase'])
+		useInMemoryPgpKeys(gpg_key, env('ORG_GRADLE_PROJECT_gpg_passphrase'))
 		sign(publishing.publications)
 	}
 

gradle/special-tests.gradle

@@ -10,7 +10,7 @@ def special = [
 	'Shfmt'
 ]
 
-boolean isCiServer = System.getenv().containsKey("CI")
+boolean isCiServer = providers.environmentVariable("CI").isPresent()
 tasks.withType(Test).configureEach {
 	if (isCiServer) {
 		retry {

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/FormatExtension.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 DiffPlug
+ * Copyright 2016-2024 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -558,8 +558,8 @@ public LicenseHeaderConfig updateYearWithLatest(boolean updateYearWithLatest) {
 
 		FormatterStep createStep() {
 			return builder.withYearModeLazy(() -> {
-				if ("true".equals(spotless.project
-						.findProperty(LicenseHeaderStep.FLAG_SET_LICENSE_HEADER_YEARS_FROM_GIT_HISTORY()))) {
+				if ("true".equals(spotless.project.getProviders()
+						.gradleProperty(LicenseHeaderStep.FLAG_SET_LICENSE_HEADER_YEARS_FROM_GIT_HISTORY()).getOrNull())) {
 					return YearMode.SET_FROM_GIT;
 				} else {
 					boolean updateYear = updateYearWithLatest == null ? getRatchetFrom() != null : updateYearWithLatest;

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/IdeHook.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2021 DiffPlug
+ * Copyright 2016-2024 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,7 +34,7 @@ private static void dumpIsClean() {
 	}
 
 	static void performHook(SpotlessTaskImpl spotlessTask) {
-		String path = (String) spotlessTask.getProject().property(PROPERTY);
+		String path = spotlessTask.getProject().getProviders().gradleProperty(PROPERTY).get();
 		File file = new File(path);
 		if (!file.isAbsolute()) {
 			System.err.println("Argument passed to " + PROPERTY + " must be an absolute path");
@@ -50,7 +50,7 @@ static void performHook(SpotlessTaskImpl spotlessTask) {
 					}
 				}
 				byte[] bytes;
-				if (spotlessTask.getProject().hasProperty(USE_STD_IN)) {
+				if (spotlessTask.getProject().getProviders().gradleProperty(USE_STD_IN).isPresent()) {
 					bytes = ByteStreams.toByteArray(System.in);
 				} else {
 					bytes = Files.readAllBytes(file.toPath());
@@ -63,7 +63,7 @@ static void performHook(SpotlessTaskImpl spotlessTask) {
 					System.err.println("Run 'spotlessDiagnose' for details https://github.com/diffplug/spotless/blob/main/PADDEDCELL.md");
 				} else {
 					System.err.println("IS DIRTY");
-					if (spotlessTask.getProject().hasProperty(USE_STD_OUT)) {
+					if (spotlessTask.getProject().getProviders().gradleProperty(USE_STD_OUT).isPresent()) {
 						dirty.writeCanonicalTo(System.out);
 					} else {
 						dirty.writeCanonicalTo(file);

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/SpotlessExtensionImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2022 DiffPlug
+ * Copyright 2016-2024 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,7 +48,7 @@ public SpotlessExtensionImpl(Project project) {
 
 	@Override
 	protected void createFormatTasks(String name, FormatExtension formatExtension) {
-		boolean isIdeHook = project.hasProperty(IdeHook.PROPERTY);
+		boolean isIdeHook = project.getProviders().gradleProperty(IdeHook.PROPERTY).isPresent();
 		TaskContainer tasks = project.getTasks();
 
 		// create the SpotlessTask

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/SpotlessPlugin.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 DiffPlug
+ * Copyright 2016-2024 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,7 +41,7 @@ public void apply(Project project) {
 					+ "https://docs.gradle.org/current/userguide/building_java_projects.html#sec:java_cross_compilation");
 		}
 		// if -PspotlessModern=true, then use the modern stuff instead of the legacy stuff
-		if (project.hasProperty(SPOTLESS_MODERN)) {
+		if (project.getProviders().gradleProperty(SPOTLESS_MODERN).isPresent()) {
 			project.getLogger().warn("'spotlessModern' has no effect as of Spotless 5.0, recommend removing it.");
 		}
 		// make sure there's a `clean` and a `check`

plugin-gradle/src/test/resources/com/diffplug/gradle/spotless/NpmTestsWithoutNpmInstallationTest_gradle_node_plugin_example_1.gradle

@@ -20,8 +20,8 @@ prettierConfig['printWidth'] = 20
 prettierConfig['parser'] = 'typescript'
 
 // the executable names
-def npmExec = System.getProperty('os.name').toLowerCase().contains('windows') ? '/npm.cmd' : '/bin/npm'
-def nodeExec = System.getProperty('os.name').toLowerCase().contains('windows') ? '/node.exe' : '/bin/node'
+def npmExec = providers.systemProperty('os.name').get().toLowerCase().contains('windows') ? '/npm.cmd' : '/bin/npm'
+def nodeExec = providers.systemProperty('os.name').get().toLowerCase().contains('windows') ? '/node.exe' : '/bin/node'
 
 spotless {
     format 'mytypescript', {

plugin-gradle/src/test/resources/com/diffplug/gradle/spotless/NpmTestsWithoutNpmInstallationTest_gradle_node_plugin_example_2.gradle

@@ -18,7 +18,7 @@ prettierConfig['printWidth'] = 20
 prettierConfig['parser'] = 'typescript'
 
 // the executable name
-def npmExec = System.getProperty('os.name').toLowerCase().contains('windows') ? '/npm.cmd' : '/bin/npm'
+def npmExec = providers.systemProperty('os.name').get().toLowerCase().contains('windows') ? '/npm.cmd' : '/bin/npm'
 
 spotless {
     typescript {

settings.gradle

@@ -31,14 +31,18 @@ dependencyResolutionManagement {
 	}
 }
 
-if (System.env['CI'] != null) {
+def env(String key) {
+	return providers.environmentVariable(key).orNull
+}
+
+if (env('CI') != null) {
 	// use the remote buildcache on all CI builds
 	buildCache {
 		def cred = {
-			if (System.env[it] != null) {
-				return System.env[it]
+			if (env(it) != null) {
+				return env(it)
 			} else {
-				return System.getProperty(it)
+				return providers.systemProperty(it)
 			}
 		}
 		remote(HttpBuildCache) {
@@ -92,6 +96,6 @@ def getStartProperty(java.lang.String name) {
 	return userProperties.get(name)
 }
 
-if (System.getenv('SPOTLESS_EXCLUDE_MAVEN') != 'true' && getStartProperty('SPOTLESS_EXCLUDE_MAVEN') != 'true') {
+if (env('SPOTLESS_EXCLUDE_MAVEN') != 'true' && getStartProperty('SPOTLESS_EXCLUDE_MAVEN') != 'true') {
 	include 'plugin-maven'	// maven-specific glue code
 }