Delete old conflicting links in pretrans for headless, javadoc and javadoc-zip

- Delete old conflicting links in pretrans for headless, javadoc and javadoc-zip
- Related: RHEL-68848

java-21-openjdk.spec

@@ -2167,6 +2167,25 @@ done
 %post
 %{post_script %{nil}}
 
+# Allow upgrades from packages that have /usr/lib/jvm/java-21-openjdk
+# as an alternatives symlink, without running into the known RPM
+# limitation when changing to a directory a symlink to a directory.
+# See also javadoc and javadoc-zip subpackages for
+# /usr/share/javadoc/java-21-openjdk, which was a symlink before.
+# /etc/java/java-21-openjdk is OK because it was always a directory.
+# Reference:
+# https://docs.fedoraproject.org/en-US/packaging-guidelines/Directory_Replacement/
+%define lua_delete_old_link() %{expand:
+path = "%{1}"
+st = posix.stat(path)
+if st and st.type == "link" then
+  os.remove(path)
+end
+}
+
+%pretrans headless -p <lua>
+%{lua_delete_old_link -- %{_jvmdir}/%{sdkdir -- %{?1}}}
+
 %post headless
 %{post_headless %{nil}}
 
@@ -2191,12 +2210,20 @@ done
 %posttrans  devel
 %{posttrans_devel %{nil}}
 
+%pretrans javadoc -p <lua>
+%{lua_delete_old_link -- %{_jvmdir}/%{sdkdir -- %{?1}}}
+%{lua_delete_old_link -- %{_javadocdir}/%{uniquejavadocdir -- %{?1}}}
+
 %post javadoc
 %{alternatives_javadoc_install %{nil}}
 
 %preun javadoc
 %{preun_javadoc %{nil}}
 
+%pretrans javadoc-zip -p <lua>
+%{lua_delete_old_link -- %{_jvmdir}/%{sdkdir -- %{?1}}}
+%{lua_delete_old_link -- %{_javadocdir}/%{uniquejavadocdir -- %{?1}}}
+
 %post javadoc-zip
 %{alternatives_javadoczip_install %{nil}}
 
@@ -2380,6 +2407,7 @@ done
 - Take ownership of versioned jvmdir in javadoc, javadoc-zip subpackages
 - Make headless own /usr/share/doc/java-21-openjdk
 - Make javadoc-zip own /usr/share/javadoc/java-21-openjdk
+- Delete old conflicting links in pretrans for headless, javadoc and javadoc-zip
 - Resolves: RHEL-71920
 - Resolves: RHEL-71954
 - Resolves: RHEL-69321