Compile against Java 8 tools jar

Copilot · web-flow · commit e2fc5b6dcfbd · 2026-05-30T03:28:57.000Z
diff --git a/build.gradle.kts b/build.gradle.kts
@@ -17,7 +17,12 @@ val javacExports = listOf(
     "jdk.compiler/com.sun.tools.javac.util",
 )
 
+val java8Compiler = javaToolchains.compilerFor {
+    languageVersion = JavaLanguageVersion.of(8)
+}
+
 dependencies {
+    compileOnly(files(java8Compiler.map { it.metadata.installationPath.file("lib/tools.jar") }))
     testImplementation(libs.junit.jupiter)
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")
 }
@@ -30,9 +35,7 @@ java {
 }
 
 tasks.named<JavaCompile>("compileJava") {
-    javaCompiler = javaToolchains.compilerFor {
-        languageVersion = JavaLanguageVersion.of(8)
-    }
+    javaCompiler = java8Compiler
     sourceCompatibility = JavaVersion.VERSION_1_8.toString()
     targetCompatibility = JavaVersion.VERSION_1_8.toString()
 }

Original file line number	Diff line number	Diff line change
`@@ -17,7 +17,12 @@ val javacExports = listOf(`
`17`	`17`	`"jdk.compiler/com.sun.tools.javac.util",`
`18`	`18`	`)`
`19`	`19`
	`20`	`+val java8Compiler = javaToolchains.compilerFor {`
	`21`	`+ languageVersion = JavaLanguageVersion.of(8)`
	`22`	`+}`
	`23`	`+`
`20`	`24`	`dependencies {`
	`25`	`+ compileOnly(files(java8Compiler.map { it.metadata.installationPath.file("lib/tools.jar") }))`
`21`	`26`	`testImplementation(libs.junit.jupiter)`
`22`	`27`	`testRuntimeOnly("org.junit.platform:junit-platform-launcher")`
`23`	`28`	`}`
`@@ -30,9 +35,7 @@ java {`
`30`	`35`	`}`
`31`	`36`
`32`	`37`	`tasks.named<JavaCompile>("compileJava") {`
`33`		`- javaCompiler = javaToolchains.compilerFor {`
`34`		`- languageVersion = JavaLanguageVersion.of(8)`
`35`		`- }`
	`38`	`+ javaCompiler = java8Compiler`
`36`	`39`	`sourceCompatibility = JavaVersion.VERSION_1_8.toString()`
`37`	`40`	`targetCompatibility = JavaVersion.VERSION_1_8.toString()`
`38`	`41`	`}`