Can I run for loop over %files directive in the .spec file?

Question

I am writing a spec file which creates multiple packages. Can I use a for loop over %files directive with different names, like this:

for name in {package1, package2, package3} ; do
  %files -n $name
  %attr(644, root, root) /etc/systemd/system/$name.service
done

Answer 1

In long words due to minimal post length restriction: No.

Spec files are not any form of scripting language.

Answer 2

Spec file is not scripting language, you still can use your own script file to create file list and feed the list to spec file. From document "Directives For the %files list":

-f <file> — Read the %files List From <file>

The -f option is used to direct RPM to read the %files list from the named file. Like the %files list in a spec file, the file named using the -f option should contain one filename per line and also include any of the directives named in this section.

%files latex -f tetex-latex-skel

Here, the filenames present in the file tetex-latex-skel would be packaged.