Chore: Upgrade Jenkins-job-builder to 6.3.0

[releng/global-jjb.git] / shell / update-java-alternatives.sh

diff --git a/shell/update-java-alternatives.sh b/shell/update-java-alternatives.sh
index 69bf019..01b972b 100644 (file)
--- a/shell/update-java-alternatives.sh
+++ b/shell/update-java-alternatives.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 # SPDX-License-Identifier: EPL-1.0
 ##############################################################################
 # Copyright (c) 2018 The Linux Foundation and others.
@@ -8,37 +8,28 @@
 # which accompanies this distribution, and is available at
 # http://www.eclipse.org/legal/epl-v10.html
 ##############################################################################
-
+echo "---> update-java-alternatives.sh"
 # This script takes the java-version variable to set the proper alternative
 # for java, javac and java_sdk_openjdk for ubuntu or centos/fedora/redhat distros
 
 JAVA_ENV_FILE="/tmp/java.env"
 
-update-java-redhat() {
-    if [[ "${SET_JDK_VERSION//[a-zA-Z]/}" = "11" ]]; then
-        export JAVA_HOME="/usr/lib/jvm/java-11-openjdk"
+JAVA_RELEASE=$(echo "$SET_JDK_VERSION" | sed 's/[a-zA-Z]//g')
+JAVA_RELEASE_NBR=$(echo "$SET_JDK_VERSION" | sed 's/[a-zA-Z:-]//g')
+#TODO check whether is it worth keeping there 2 distinct variables
+update_java_redhat() {
+    if [ "${JAVA_RELEASE}" -ge 9 ]; then
+        # Java 9 or newer: new version format
+        export JAVA_HOME="/usr/lib/jvm/java-${JAVA_RELEASE}-openjdk"
     else
-        export JAVA_HOME="/usr/lib/jvm/java-1.${SET_JDK_VERSION//[a-zA-Z:-]/}.0-openjdk"
+        # Java 8 or older: old version format
+        export JAVA_HOME="/usr/lib/jvm/java-1.${JAVA_RELEASE_NBR}.0-openjdk"
     fi
-    sudo /usr/sbin/alternatives --install /usr/bin/java java "${JAVA_HOME}/bin/java" 1
-    sudo /usr/sbin/alternatives --install /usr/bin/javac javac "${JAVA_HOME}/bin/javac" 1
-    sudo /usr/sbin/alternatives --install /usr/lib/jvm/java-openjdk java_sdk_openjdk "${JAVA_HOME}" 1
-    sudo /usr/sbin/alternatives --set java "${JAVA_HOME}/bin/java"
-    sudo /usr/sbin/alternatives --set javac "${JAVA_HOME}/bin/javac"
-    sudo /usr/sbin/alternatives --set java_sdk_openjdk "${JAVA_HOME}"
-    echo JAVA_HOME="$JAVA_HOME" > "$JAVA_ENV_FILE"
 }
 
-update-java-ubuntu() {
+update_java_ubuntu() {
     HOST_ARCH=$(dpkg --print-architecture)
-    export JAVA_HOME="/usr/lib/jvm/java-${SET_JDK_VERSION//[a-zA-Z:-]/}-openjdk-${HOST_ARCH}"
-    sudo /usr/bin/update-alternatives --install /usr/bin/java java "${JAVA_HOME}/bin/java" 1
-    sudo /usr/bin/update-alternatives --install /usr/bin/javac javac "${JAVA_HOME}/bin/javac" 1
-    sudo /usr/bin/update-alternatives --install /usr/lib/jvm/java-openjdk java_sdk_openjdk "${JAVA_HOME}" 1
-    sudo /usr/bin/update-alternatives --set java "${JAVA_HOME}/bin/java"
-    sudo /usr/bin/update-alternatives --set javac "${JAVA_HOME}/bin/javac"
-    sudo /usr/bin/update-alternatives --set java_sdk_openjdk "${JAVA_HOME}"
-    echo JAVA_HOME="$JAVA_HOME" > "$JAVA_ENV_FILE"
+    export JAVA_HOME="/usr/lib/jvm/java-${JAVA_RELEASE_NBR}-openjdk-${HOST_ARCH}"
 }
 
 echo "---> Updating Java version"
@@ -47,12 +38,38 @@ OS=$(facter operatingsystem | tr '[:upper:]' '[:lower:]')
 case "${OS}" in
     fedora|centos|redhat)
         echo "---> RedHat type system detected"
-        update-java-redhat
+        update_java_redhat
+       alternatives="/usr/sbin/alternatives"
     ;;
-    ubuntu)
-        echo "---> Ubuntu system detected"
-        update-java-ubuntu
+    ubuntu|debian)
+        echo "---> Ubuntu/Debian system detected"
+        update_java_ubuntu
+       alternatives=$(which update-alternatives)
     ;;
 esac
+
+if ! [ -d "$JAVA_HOME" ]; then
+    echo "$JAVA_HOME directory not found - trying to find an approaching one"
+    if ls -d "$JAVA_HOME"*; then
+    # shellcheck disable=SC2012
+       JAVA_HOME=$(ls -d "$JAVA_HOME"* | head -1)
+        export JAVA_HOME
+    else
+        echo "no $JAVA_HOME directory nor candidate found -exiting " >&2
+        exit 17
+    fi
+fi
+
+# If sudo is not found, the commands below will run anyway
+SUDO_CMD=$(which sudo)
+
+$SUDO_CMD "$alternatives" --install /usr/bin/java java "${JAVA_HOME}/bin/java" 1
+$SUDO_CMD "$alternatives" --install /usr/bin/javac javac "${JAVA_HOME}/bin/javac" 1
+$SUDO_CMD "$alternatives" --install /usr/lib/jvm/java-openjdk java_sdk_openjdk "${JAVA_HOME}" 1
+$SUDO_CMD "$alternatives" --set java "${JAVA_HOME}/bin/java"
+$SUDO_CMD "$alternatives" --set javac "${JAVA_HOME}/bin/javac"
+$SUDO_CMD "$alternatives" --set java_sdk_openjdk "${JAVA_HOME}"
+echo JAVA_HOME="$JAVA_HOME" > "$JAVA_ENV_FILE"
+
 java -version
 echo JAVA_HOME="${JAVA_HOME}"