Java: Fix gradle bug - sets GRADLE_USER_HOME incorrectly (#152)

* fix gradle bug

* modify tests

src/java/devcontainer-feature.json

 {
   "id": "java",
-  "version": "1.0.7",
+  "version": "1.0.8",
   "name": "Java (via SDKMAN!)",
   "documentationURL": "https://github.com/devcontainers/features/tree/main/src/java",
   "description": "Installs Java, SDKMAN! (if not installed), and needed dependencies.",
@@ -41,8 +41,6 @@
   },
   "containerEnv": {
     "SDKMAN_DIR": "/usr/local/sdkman",
-    "GRADLE_USER_HOME": "${HOME}/.gradle",
-    "M2": "${HOME}/.m2",
     "JAVA_HOME": "/usr/local/sdkman/candidates/java/current",
     "PATH": "/usr/local/sdkman/bin:/usr/local/sdkman/candidates/java/current/bin:/usr/local/sdkman/candidates/gradle/current/bin:/usr/local/sdkman/candidates/maven/current/bin:${PATH}"
   }

src/java/install.sh

@@ -167,13 +167,11 @@ fi
 # Install Gradle
 if [[ "${INSTALL_GRADLE}" = "true" ]] && ! gradle --version > /dev/null; then
     sdk_install gradle latest
-    updaterc '[ -z "${GRADLE_USER_HOME}" ] && export GRADLE_USER_HOME=${HOME}/.gradle'
 fi
 
 # Install Maven
 if [[ "${INSTALL_MAVEN}" = "true" ]] && ! mvn --version > /dev/null; then
     sdk_install maven latest
-    updaterc '[ -z "$M2" ] && export M2=$HOME/.m2'
 fi
 
 echo "Done!"

test/java/install_gradle_and_maven.sh

@@ -5,9 +5,17 @@ set -e
 # Optional: Import test library
 source dev-container-features-test-lib
 
+check "user is root" whoami | grep root
+
 check "java" java --version
 check "gradle" gradle --version
+
+cd /tmp && gradle init --type basic --dsl groovy --incubating --project-name test
+check "GRADLE_USER_HOME exists" ls -la /root | grep ".gradle"
+
 check "maven" mvn --version
+cd /tmp && mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DarchetypeVersion=1.4 -DinteractiveMode=false
+check "m2 exists" ls -la /root | grep ".m2"
 
 # Report result
 reportResults

test/java/install_gradle_and_maven_for_user.sh

+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+check "user is vscode" whoami | grep vscode
+
+check "java" java --version
+check "gradle" gradle --version
+
+cd /tmp && gradle init --type basic --dsl groovy --incubating --project-name test
+check "GRADLE_USER_HOME exists" ls -la /home/vscode | grep ".gradle"
+
+check "maven" mvn --version
+cd /tmp && mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DarchetypeVersion=1.4 -DinteractiveMode=false
+check "m2 exists" ls -la /home/vscode | grep ".m2"
+
+# Report result
+reportResults

test/java/scenarios.json

@@ -8,6 +8,20 @@
             }
         }
     },
+    "install_gradle_and_maven_for_user": {
+        "image": "ubuntu:focal",
+        "remoteUser": "vscode",
+        "features": {
+            "common-utils": {
+                "username": "vscode"
+            },
+            "java": {
+                "version": "latest",
+                "installGradle": true,
+                "installMaven": true
+            }
+        }
+    },
     "install_gradle_and_maven": {
         "image": "ubuntu:focal",
         "features": {