[Fedora-packaging] Re: Hardlinking *.pyc and *.pyo

Related to recent space saving discussions, I came across PLD's rpm-build-macros package recently, and found that they hardlink identical *.pyc and *.pyo. In a lot of cases, they're the same, and there's some potential for saving some MB "for free", on my FC6 x86_64 box: $ /usr/sbin/hardlink -ncv /usr/lib*/python2.4 2>&1 | tail -n 1 Would save 11116544

The PLD implementation looks like this: # Hardlink binary identical .pyc and .pyo files # (idea by glen <at> pld-linux <dot> org) %__spec_install_post_py_hardlink {\ %{!?no_install_post_py_hardlink: __spec_install_post_py_hardlink() { \ [ ! -d "$RPM_BUILD_ROOT" ] || find "$RPM_BUILD_ROOT" -name '*.pyc' | while read a; do \ b="$(echo $a|sed -e 's/.pyc$/.pyo/')"; \ if cmp -s "$a" "$b"; then \ ln -f "$a" "$b"; \ fi; \ done \ }; __spec_install_post_py_hardlink } } The use of "cmp" would require diffutils installed. Or the above could be converted to use hardlink instead (which would have to be made sure to be around) or maybe sha1sum (in coreutils, pretty much always around in buildroots). I suppose something like the above could be easily added to redhat-rpm-config or rpm, eg. embedded in brp-python-bytecompile or run after it in %__os_install_post.

Worth it? Other comments?