Java: add jdkDistro option (#172)

* add jdkDistro option

* bump version

src/java/devcontainer-feature.json

 {
   "id": "java",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "name": "Java (via SDKMAN!)",
   "documentationURL": "https://github.com/devcontainers/features/tree/main/src/java",
   "description": "Installs Java, SDKMAN! (if not installed), and needed dependencies.",
@@ -17,6 +17,17 @@
       "default": "latest",
       "description": "Select or enter a Java version to install"
     },
+    "jdkDistro": {
+      "type": "string",
+      "proposals": [
+        "ms",
+        "open",
+        "oracle",
+        "tem"
+      ],
+      "default": "ms",
+      "description": "Select or enter a JDK distribution"
+    },
     "installGradle": {
       "type": "boolean",
       "default": false,

src/java/install.sh

@@ -12,6 +12,7 @@
 JAVA_VERSION=${VERSION:-"lts"}
 INSTALL_GRADLE=${INSTALLGRADLE:-"false"}
 INSTALL_MAVEN=${INSTALLMAVEN:-"false"}
+JDK_DISTRO=${JDKDISTRO}
 
 export SDKMAN_DIR=${SDKMAN_DIR:-"/usr/local/sdkman"}
 USERNAME=${USERNAME:-"automatic"}
@@ -76,12 +77,13 @@ check_packages() {
     fi
 }
 
-# Use Microsoft JDK for everything but JDK 8
-jdk_distro="ms"
+# Use Microsoft JDK for everything but JDK 8 and 18 (unless specified differently with jdkDistro option)
 get_jdk_distro() {
     VERSION="$1"
-    if echo "${VERSION}" | grep -E '^8([\s\.]|$)' > /dev/null 2>&1; then
-        jdk_distro="tem"
+    if [ "${JDK_DISTRO}" = "ms" ]; then
+        if echo "${VERSION}" | grep -E '^8([\s\.]|$)' > /dev/null 2>&1 || echo "${VERSION}" | grep -E '^18([\s\.]|$)' > /dev/null 2>&1; then
+            JDK_DISTRO="tem"
+        fi
     fi
 }
 
@@ -149,7 +151,7 @@ if [ ! -d "${SDKMAN_DIR}" ]; then
 fi
 
 get_jdk_distro ${JAVA_VERSION}
-sdk_install java ${JAVA_VERSION} "\\s*" "(\\.[a-z0-9]+)*-${jdk_distro}\\s*" ".*-[a-z]+$" "true"
+sdk_install java ${JAVA_VERSION} "\\s*" "(\\.[a-z0-9]+)*-${JDK_DISTRO}\\s*" ".*-[a-z]+$" "true"
 
 # Additional java versions to be installed but not be set as default.
 if [ ! -z "${ADDITIONAL_VERSIONS}" ]; then
@@ -158,7 +160,7 @@ if [ ! -z "${ADDITIONAL_VERSIONS}" ]; then
         read -a additional_versions <<< "$ADDITIONAL_VERSIONS"
         for version in "${additional_versions[@]}"; do
             get_jdk_distro ${version}
-            sdk_install java ${version} "\\s*" "(\\.[a-z0-9]+)*-${jdk_distro}\\s*" ".*-[a-z]+$" "false"
+            sdk_install java ${version} "\\s*" "(\\.[a-z0-9]+)*-${JDK_DISTRO}\\s*" ".*-[a-z]+$" "false"
         done
     IFS=$OLDIFS
     su ${USERNAME} -c ". ${SDKMAN_DIR}/bin/sdkman-init.sh && sdk default java ${JAVA_VERSION}"

test/java/install_additional_java.sh

@@ -5,7 +5,7 @@ set -e
 # Optional: Import test library
 source dev-container-features-test-lib
 
-check "java version 17 installed as default" java --version | grep 17
+check "java version 18 installed as default" java --version | grep 18
 check "java version 11 installed"  ls /usr/local/sdkman/candidates/java  | grep 11
 check "java version 8 installed"  ls /usr/local/sdkman/candidates/java | grep 8
 

test/java/install_from_non_default_distro.sh

+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+check "java version 18 installed as default" java --version | grep 18
+
+# Report result
+reportResults

test/java/scenarios.json

 {
+    "install_from_non_default_distro": {
+        "image": "ubuntu:focal",
+        "features": {
+            "java": {
+                "version": "18",
+                "jdkDistro": "open"
+            }
+        }
+    },
     "install_additional_java": {
         "image": "ubuntu:focal",
         "features": {
             "java": {
-                "version": "17",
+                "version": "18",
                 "additionalVersions": "11,8"
             }
         }