bundle maven and gradle

src/java/devcontainer-feature.json

@@ -15,6 +15,16 @@
       ],
       "default": "lts",
       "description": "Select or enter a Java version to install"
+    },
+    "install_gradle": {
+      "type": "boolean",
+      "default": false,
+      "description": "Install Gradle, a build automation tool for multi-language software development"
+    },
+    "install_maven": {
+      "type": "boolean",
+      "default": false,
+      "description": "Install Maven, a management tool for Java"
     }
   },
   "buildArg": "_VSC_INSTALL_JAVA",
@@ -23,7 +33,9 @@
   ],
   "containerEnv": {
     "SDKMAN_DIR": "/usr/local/sdkman",
-    "PATH": "${SDKMAN_DIR}/bin:${SDKMAN_DIR}/candidates/java/current/bin:${PATH}"
+    "GRADLE_USER_HOME": "${HOME}/.gradle",
+    "M2": "${HOME}/.m2",
+    "PATH": "${SDKMAN_DIR}/bin:${SDKMAN_DIR}/candidates/java/current/bin:${SDKMAN_DIR}/candidates/gradle/current/bin:${SDKMAN_DIR}/candidates/maven/current/bin:${PATH}"
   },
   "settings": {
     "java.import.gradle.java.home": "/usr/local/sdkman/candidates/java/current"

src/java/install.sh

@@ -10,6 +10,8 @@
 # Syntax: ./java-debian.sh [JDK version] [SDKMAN_DIR] [non-root user] [Add to rc files flag]
 
 JAVA_VERSION=${VERSION:-"lts"}
+INSTALL_GRADLE=${INSTALL_GRADLE:-"false"}
+INSTALL_MAVEN=${INSTALL_MAVEN:-"false"}
 
 export SDKMAN_DIR=${SDKMAN_DIR:-"/usr/local/sdkman"}
 USERNAME=${USERNAME:-"automatic"}
@@ -167,4 +169,16 @@ if [ ! -z "${ADDITIONAL_VERSIONS}" ]; then
     su ${USERNAME} -c ". ${SDKMAN_DIR}/bin/sdkman-init.sh && sdk default java ${JAVA_VERSION}"
 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-scenarios/install_gradle_and_maven.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+check "gradle" gradle --version
+check "maven" mvn --version
+
+# Report result
+reportResults

test-scenarios/scenarios.json

@@ -1,4 +1,14 @@
 {
+    "install_gradle_and_maven": {
+        "image": "ubuntu:focal",
+        "features": {
+            "java": {
+                "version": "17",
+                "install_gradle": true,
+                "install_maven": true
+             }
+         }
+    },
     "install_additional_php": {
         "image": "ubuntu:focal",
         "features": {