Merge pull request #272 from ei82/master

Fixed user deletion issue in rpm postuninstall scriptlet.

Author: muuki88

src/main/resources/com/typesafe/sbt/packager/rpm/postuninstall

@@ -1,12 +1,19 @@
 # Removing system user/group : ${{daemon_user}} and ${{daemon_group}}
-echo "Try deleting system user and group [${{daemon_user}}:${{daemon_group}}]"
-if getent passwd | grep -q "^${{daemon_user}}:"; 
+
+# Scriptlet syntax: http://fedoraproject.org/wiki/Packaging:ScriptletSnippets#Syntax
+# $1 == 1 is upgrade and $1 == 0 is uninstall
+if [[ $1 == 0 ]]
 then
-    echo "Deleting system user: ${{daemon_user}}"
-    userdel ${{daemon_user}}
-fi
-if getent group | grep -q "^${{daemon_group}}:" ;
-then
-    echo "Deleting system group: ${{daemon_group}}"
-    groupdel ${{daemon_group}}
+    echo "Try deleting system user and group [${{daemon_user}}:${{daemon_group}}]"
+    if getent passwd | grep -q "^${{daemon_user}}:"; 
+    then
+        echo "Deleting system user: ${{daemon_user}}"
+        userdel ${{daemon_user}}
+    fi
+    if getent group | grep -q "^${{daemon_group}}:" ;
+    then
+        echo "Deleting system group: ${{daemon_group}}"
+        groupdel ${{daemon_group}}
+    fi
 fi
+