Merge pull request #350 from fwcd/skip-javahome-system-jdk

fix: Skip setting `JAVA_HOME` when using system JDK #422

libexec/jenv-exec

@@ -33,7 +33,9 @@ JENV_COMMAND="$1"
 export JENV_OPTIONS="$(jenv-options)"    
 
 
-export JAVA_HOME="$JENV_ROOT/versions/$JENV_VERSION"    
+if [ "$JENV_VERSION" != "system" ]; then
+  export JAVA_HOME="$JENV_ROOT/versions/$JENV_VERSION"
+fi
 
 if [ -z "$JENV_COMMAND" ]; then
   jenv-help --usage exec >&2

libexec/jenv-info

@@ -32,7 +32,9 @@ export JENV_OPTIONS="$(jenv-options)"
 
 JENV_COMMAND="$1"              
 
-export JAVA_HOME="$JENV_ROOT/versions/$JENV_VERSION"    
+if [ "$JENV_VERSION" != "system" ]; then
+  export JAVA_HOME="$JENV_ROOT/versions/$JENV_VERSION"
+fi
           
 
 JENV_COMMAND_PATH="$(jenv-which "$JENV_COMMAND")"

libexec/jenv-javahome

@@ -25,6 +25,10 @@ export JENV_VERSION="$(jenv-version-name)"
 export JENV_OPTIONS="$(jenv-options)"    
 
 
-export JAVA_HOME="$JENV_ROOT/versions/$JENV_VERSION"    
+if [ "$JENV_VERSION" == "system" ]; then
+  echo "Using system JDK, no JAVA_HOME set!"
+  exit 1
+fi
 
-echo $JAVA_HOME
+export JAVA_HOME="$JENV_ROOT/versions/$JENV_VERSION"
+echo $JAVA_HOME