create_template_list.sh enhancements

- allow to pass environment variable '$YUM_OPTS' (to allow adding for example '--assumeyes')
- only try to uninstall existing template package if already installed to avoid failing and unnecessary output and prompts
- output
- refactoring

create_template_list.sh

@@ -78,15 +78,24 @@ for file_name in ${files[@]}; do
 
     if [ ! -e "${file_name}" ]; then
         echo "Copying ${file_name} from ${name} to ${PWD}/${file_name}..."
-        qvm-run --pass-io "${name}" "cat ${path}/${file_name}" > "${file_name}"
+        qvm-run --pass-io "${name}" "cat ${path}/${file_name}" > "${PWD}/${file_name}"
     fi
 
-    sudo yum erase $(echo "${file_name}" | sed -r "s/(${version}).+$//") && {
-        sudo yum install "${file_name}" && {
-            rm -f "${file_name}"
-        }
-    }
+    package_name="$(echo "${file_name}" | sed -r "s/(${version}).+$//")"
+
+    if sudo yum $YUM_OPTS list installed "$package_name" >/dev/null 2>&1 ; then
+        echo "Uninstalling package ${package_name}..."
+        sudo yum $YUM_OPTS erase "$package_name"
+    fi
+
+    echo "Installing file ${file_name}..."
+    if sudo yum $YUM_OPTS install "${file_name}" ; then
+        echo "Deleting ${PWD}/${file_name}..."
+        rm -f "${file_name}"
+    fi
 done
+
+echo "Done."
 EOF
 
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