Systemd-related tools
based on https://github.com/sgallagher/systemdunitparser toolkit provides means for automated mass-change of systemd unit files
edit_systemd.py
add
add section/option/value to systemd unit file
edit
using regular expression edit existing entry identified by section_re/option_re/value_search
value is replaced with value_search/value_replace regexp combo (both are regexp expressions)
mutate
using regular expression mutate existing entry identified by section_re/option_re/value_search
section/option/value is replaced with value_search/value_replace_str where value_search is regexp, and value_replace_str is a python format string backreferencing groups from value_search