Only write toolchains.xml if it doesn't exist

src/cache-base.ts

@@ -204,26 +204,16 @@ export class GradleStateCache {
             fs.writeFileSync(initScriptPath, initScriptContent)
         }
 
-        // Copy the toolchains.xml file to `~/.m2`
+        // Copy the toolchain definitions file to `~/.m2/toolchains.xml` (if the file doesn't already exist)
         const m2dir = path.resolve(this.userHome, '.m2')
-        fs.mkdirSync(m2dir, {recursive: true})
-        core.info(`Created m2 directory ${m2dir}`)
-
-        const settingsXml = path.resolve(m2dir, 'settings.xml')
-        if (fs.existsSync(settingsXml)) {
-            const existingSettings = fs.readFileSync(settingsXml, 'utf8')
-            core.info("Found existing settings.xml with content:")
-            core.info(existingSettings)
-        }
-
         const toolchainXmlTarget = path.resolve(m2dir, 'toolchains.xml')
-        if (fs.existsSync(toolchainXmlTarget)) {
-            const existingToolchains = fs.readFileSync(toolchainXmlTarget, 'utf8')
-            core.info("Found existing toolchains.xml with content:")
-            core.info(existingToolchains)
+        if (!fs.existsSync(toolchainXmlTarget)) {
+            fs.mkdirSync(m2dir, {recursive: true})
+            const toolchainContent = this.readInitScriptAsString('toolchains.xml')
+            fs.writeFileSync(toolchainXmlTarget, toolchainContent)
+
+            core.info(`Wrote default JDK locations to ${toolchainXmlTarget}`)
         }
-        const toolchainContent = this.readInitScriptAsString('toolchains.xml')
-        fs.writeFileSync(toolchainXmlTarget, toolchainContent)
     }
 
     private readInitScriptAsString(resource: string): string {

src/resources/init-scripts/toolchains.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- JDK Toolchains installed by default on GitHub-hosted runners -->
 <toolchains>
+  <!-- JDK Toolchains installed by default on GitHub-hosted runners -->
   <toolchain>
     <type>jdk</type>
     <provides>