Re: [gentoo-user] No 'libs' in world file?

[Alexander Kapshuk]

On Wed, Mar 4, 2015 at 8:06 AM, Walter Dnes <waltdnes@××××××××.org> wrote:

> On Tue, Mar 03, 2015 at 12:01:04AM +0100, Andreas K. Huettel wrote
>
> > Well... let's say it like this:
> >
> > If you look at your world file, you should for each line be able to
> > immediately say "yes I know what this is and I need it". Where "I need
> it"
> > means "I need it directly", and *not* "I need it because some other
> package
> > needs it".
> >
> > In most cases this means that libraries should not be in the world file.
> > You'll rarely say "Yes I need Boost." Instead you may need LibreOffice,
> and
> > that needs Boost...
>
>   Rather than try to remember everything, let the computer do some of
> the work for you (novel idea <G>).  Use the command...
>
> xargs -a /var/lib/portage/world -n 1 equery d
>

Just thought of using 'equery d $(</var/lib/portage/world)' as an
alternative to the command line above. Not that there's something wrong
with the original suggestion.



>
> to determine which files would be pulled in as dependancies.
> ***WARNING: DO NOT REDIRECT OR PIPE***.  It won't work.  Use a 2nd term
> for the output, along with {CTRL-S} and {CTRL-Q} to stop and restart the
> output.  You'l have to run the command with root privileges to see the
> file /var/lib/portage/world  Here's how it starts off for me...
>
>
> [d531][root][~] xargs -a /var/lib/portage/world -n 1 equery d
>  * These packages depend on app-admin/localepurge:
>  * These packages depend on app-admin/logrotate:
>  * These packages depend on app-admin/sudo:
>  * These packages depend on app-admin/syslog-ng:
>  * These packages depend on app-arch/zip:
> sys-devel/gcc-4.8.3 (app-arch/zip)
> www-client/seamonkey-2.32 (app-arch/zip)
>
>   There are no ebuilds depending on localepurge, logrotate, sudo, or
> syslog-ng.  It's up to you whether or not you want them.  However, zip
> is an absolute dependancy of gcc and seamonkey, and can be removed from
> my world file.  Absolute dependancies are easy.  *BEWARE OF CONDITIONAL
> DEPENDANCIES*; e.g.
>
>  * These packages depend on dev-perl/File-MimeInfo:
> x11-misc/xdg-utils-1.1.0_rc2 (perl ? dev-perl/File-MimeInfo)
>
>   That says if you've built x11-misc/xdg-utils-1.1.9_rc2 withe the
> "perl" USE flag, then dev-perl/File-MimeInfo will be pulled in as a
> dependancy.  You have to check whether you've used that USE flag on that
> ebuilds.
>
>   And a "lib" is not necessarily always a direct dependancy.  E.g. my
> HDHomerun OTA TV tuner requires the media-libs/libhdhomerun ebuild to be
> explicitly installed.
>
>
> Walter Dnes <waltdnes@××××××××.org>
> I don't run "desktop environments"; I run useful applications
>
>