[Ubuntu] Move preinstalled Java distributions to the toolcache directory (#2915)

* move preinstalled java to toolcache

* rework installation and fix software report

images/linux/scripts/SoftwareReport/SoftwareReport.Java.psm1

@@ -1,29 +1,19 @@
-function Get-JavaFullVersion {
-    param($JavaRootPath)
-
-    $javaBinPath = Join-Path $javaRootPath "/bin/java"
-    $javaVersionOutput = (Get-CommandResult "$javaBinPath -version").Output
-    $matchResult = $javaVersionOutput | Select-String '^openjdk version \"([\d\._]+)\"'
-    return $matchResult.Matches.Groups[1].Value
-}
-
 function Get-JavaVersions {
-    $defaultJavaPath = $env:JAVA_HOME
-    $javaVersions = Get-Item env:JAVA_HOME_*_X64
-    $sortRules = @{
-        Expression = { [Int32]$_.Name.Split("_")[2] }  
-        Descending = $false
-    }
+    $toolcachePath = Join-Path $env:AGENT_TOOLSDIRECTORY "Java_Adopt_jdk"
+    $javaToolcacheVersions = Get-ChildItem $toolcachePath -Name | Sort-Object -Descending
 
-    return $javaVersions | Sort-Object $sortRules | ForEach-Object {
-        $javaPath = $_.Value
-        $version = Get-JavaFullVersion $javaPath
-        $defaultPostfix = ($javaPath -eq $defaultJavaPath) ? " (default)" : ""
+    return $javaToolcacheVersions | ForEach-Object {
+        $majorVersion = $_.split(".")[0]
+        $fullVersion = $_.Replace("-", "+")
+        $defaultJavaPath = $env:JAVA_HOME
+        $javaPath = Get-Item env:JAVA_HOME_${majorVersion}_X64
+
+        $defaultPostfix = ($javaPath.Value -eq $defaultJavaPath) ? " (default)" : ""
 
         [PSCustomObject] @{
-            "Version" = $version + $defaultPostfix
+            "Version" = $fullVersion + $defaultPostfix
             "Vendor" = "Adopt OpenJDK"
-            "Environment Variable" = $_.Name
+            "Environment Variable" = $javaPath.Name
         }
     }
 }

images/linux/scripts/installers/java-tools.sh

@@ -9,6 +9,7 @@ source $HELPER_SCRIPTS/etc-environment.sh
 
 JAVA_VERSIONS_LIST=$(get_toolset_value '.java.versions | .[]')
 DEFAULT_JDK_VERSION=$(get_toolset_value '.java.default')
+JAVA_TOOLCACHE_PATH="$AGENT_TOOLSDIRECTORY/Java_Adopt_jdk"
 
 # Install GPG Key for Adopt Open JDK. See https://adoptopenjdk.net/installation.html
 wget -qO - "https://adoptopenjdk.jfrog.io/adoptopenjdk/api/gpg/key/public" | apt-key add -
@@ -19,19 +20,37 @@ if isUbuntu16 || isUbuntu18 ; then
     apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 0xB1998361219BD9C9
     apt-add-repository "deb https://repos.azul.com/azure-only/zulu/apt stable main"
 fi
+
 apt-get update
 
 for JAVA_VERSION in ${JAVA_VERSIONS_LIST[@]}; do
     apt-get -y install adoptopenjdk-$JAVA_VERSION-hotspot=\*
-    echo "JAVA_HOME_${JAVA_VERSION}_X64=/usr/lib/jvm/adoptopenjdk-${JAVA_VERSION}-hotspot-amd64" | tee -a /etc/environment
+    javaVersionPath="/usr/lib/jvm/adoptopenjdk-${JAVA_VERSION}-hotspot-amd64"
+    echo "JAVA_HOME_${JAVA_VERSION}_X64=$javaVersionPath" | tee -a /etc/environment
+    fullJavaVersion=$(cat "$javaVersionPath/release" | grep "^SEMANTIC" | cut -d "=" -f 2 | tr -d "\"" | tr "+" "-")
+
+    # If there is no semver in java release, then extract java version from -fullversion
+    if [[ -z $fullJavaVersion ]]; then
+        fullJavaVersion=$(java -fullversion 2>&1 | tr -d "\"" | tr "+" "-" | awk '{print $4}')
+    fi
+    
+    javaToolcacheVersionPath="$JAVA_TOOLCACHE_PATH/$fullJavaVersion"
+    mkdir -p "$javaToolcacheVersionPath"
+
+    # Create a complete file
+    touch "$javaToolcacheVersionPath/x64.complete"
+
+    # Create symlink for Java
+    ln -s $javaVersionPath "$javaToolcacheVersionPath/x64"
 done
 
-# Set Default Java version.
+# Set Default Java version
 if isUbuntu16; then
     # issue: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=825987
     # stackoverflow: https://askubuntu.com/questions/1187136/update-java-alternatives-only-java-but-not-javac-is-changed
     sed -i 's/(hl|jre|jdk|plugin|DUMMY) /(hl|jre|jdk|jdkhl|plugin|DUMMY) /g' /usr/sbin/update-java-alternatives
 fi
+
 update-java-alternatives -s /usr/lib/jvm/adoptopenjdk-${DEFAULT_JDK_VERSION}-hotspot-amd64
 
 echo "JAVA_HOME=/usr/lib/jvm/adoptopenjdk-${DEFAULT_JDK_VERSION}-hotspot-amd64" | tee -a /etc/environment