...every day a little pondering, backstage information, jokes, tips and tricks.
13
Tips & Tricks
Upgrade/Downgrade Package Features
"The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all progress
depends on the unreasonable man."
— George Bernard Shaw
What if you have already installed an Apache with a bunch of enabled
addon modules (e.g. via "
openpkg build -D with_mod_php -D
with_mod_perl apache | sh") and now you recognize afterwards that
you also need mod_ssl for SSL/TLS support?
Package Feature Upgrade
Don't panic. You don't have to fiddle around with all the old options
yourself again. Just run "
openpkg build -g -D with_mod_ssl=yes apache
| sh" and the
openpkg build command figures out for
you what build options are already in effect, adds the additional
with_mod_ssl option, determines the new dependency packages
(here the direct dependencies
openssl and
mm plus
a bunch of indirect ones like
perl, etc) and builds and
rebuilds everything for you. OpenPKG will also automatically
restart Apache for you at the end. Voila!
Package Feature Downgrade
Btw, similar to the SSL/TLS upgrade, you can also downgrade to a plain
HTTP Apache with "
openpkg build -g -D with_mod_ssl=no apache |
sh". The only drawback is that the now no longer needed packages
"openssl", "mm" and "perl" are not automatically removed for you as
"openpkg build" no longer knows by querying the RPM database that
those packages were installed just for dependency reasons. Instead it
has to assume that they were explicitly installed for the user.
