One-liners for ensuring requirements.txt / system deps match

update-requirements.sh

# Produce a unified requirements.txt (no guarantees this comparison works properly for all versioning cases)
cat requirements.txt <(pip freeze) | awk 'BEGIN { FS="=="; OFS="==" } { if (V[tolower($1)] != "") { if ($2 != V[tolower($1)]) { print $1, $2 } else { print $1, V[tolower($1)] } } else { V[tolower($1)]=$2 } }'

# Produce a diff for manual inspection
cat requirements.txt <(pip freeze) | awk 'BEGIN { FS="=="; OFS="==" } { if (V[tolower($1)] != "") { if ($2 != V[tolower($1)]) { print "- "$1, V[tolower($1)]; print "+ "$1, $2 } else { print "  "$1, $2 } } else { V[tolower($1)]=$2 } }'