Do not override JAVA_HOME set by user

0001-Adapt-mvn-script.patch

@@ -20,11 +20,13 @@ index a554c6617..739501af4 100755
  #   MAVEN_OPTS      (Optional) Java runtime options used when Maven is executed.
  #   MAVEN_SKIP_RC   (Optional) Flag to disable loading of mavenrc files.
  # -----------------------------------------------------------------------------
-@@ -33,12 +33,16 @@ if [ -z "$MAVEN_SKIP_RC" ] ; then
+@@ -33,12 +33,18 @@ if [ -z "$MAVEN_SKIP_RC" ] ; then
      . /etc/mavenrc
    fi
  
-+  . /etc/java/maven.conf
++  if [ -z "$JAVA_HOME" ] ; then
++    . /etc/java/maven.conf
++  fi
 +
    if [ -f "$HOME/.mavenrc" ] ; then
      . "$HOME/.mavenrc"

maven.spec

@@ -7,7 +7,7 @@
 Name:           maven
 Epoch:          1
 Version:        3.6.3
-Release:        13%{?dist}
+Release:        14%{?dist}
 Summary:        Java project management and project comprehension tool
 # maven itself is ASL 2.0
 # bundled slf4j is MIT
@@ -291,6 +291,10 @@ if [[ $1 -eq 0 ]]; then update-alternatives --remove mvn %{homedir}/bin/mvn; fi
 %config %{_javaconfdir}/maven.conf-openjdk17
 
 %changelog
+* Fri Nov 05 2021 Mikolaj Izdebski <mizdebsk@redhat.com> - 1:3.6.3-14
+- Do not override JAVA_HOME set by user
+- Resolves: rhbz#2020478
+
 * Tue Nov 02 2021 Mikolaj Izdebski <mizdebsk@redhat.com> - 1:3.6.3-13
 - Suggest OpenJDK 17 as default Maven binding