[gentoo-amd64] how to find reverse dependencies?

[gentoo-amd64] how to find reverse dependencies?

[Steve Herber]

I removed a package recently and portage keeps wanting to put it back
into the system.  How can I find out why portage wants to reinstall it?
Here is a cleaned up example:

emerge --ask --verbose --deep --update world

Calculating dependencies... done!
[ebuild  N    ] media-video/vcdimager-0.7.23  USE="-minimal -xml" 986 kB
[ebuild     U ] dev-lang/php-5.2.10 [5.2.9-r2]
[ebuild     U ] net-libs/xulrunner-1.9.0.11 [1.9.0.10]
[ebuild     U ] www-client/mozilla-firefox-3.0.11 [3.0.10]
[ebuild     U ] sys-fs/udev-141 [124-r2]
[ebuild     U ] sys-fs/cryptsetup-1.0.6-r2 [1.0.5-r1]
[blocks b     ] >=sys-fs/udev-126 (">=sys-fs/udev-126" is blocking sys-fs/cryptsetup-1.0.5-r1)

Total: 6 packages (5 upgrades, 1 new), Size of downloads: 55,215 kB
Conflict: 1 block

How can I find the package that keeps pulling in vcdimager?

Thanks,

-- 
Steve Herber	herber@thing.com		work: 206-221-7262
Software Engineer, UW Medicine, IT Services	home: 425-454-2399

Re: [gentoo-amd64] how to find reverse dependencies?

[Joseph Booker]

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On Fri, 26 Jun 2009 19:24:00 -0700 (PDT)
Steve Herber <herber@thing.com> wrote:

> I removed a package recently and portage keeps wanting to put it back
> into the system.  How can I find out why portage wants to reinstall
> it? Here is a cleaned up example:
> 
> emerge --ask --verbose --deep --update world
> 
> Calculating dependencies... done!
> [ebuild  N    ] media-video/vcdimager-0.7.23  USE="-minimal -xml" 986
> kB [ebuild     U ] dev-lang/php-5.2.10 [5.2.9-r2]
> [ebuild     U ] net-libs/xulrunner-1.9.0.11 [1.9.0.10]
> [ebuild     U ] www-client/mozilla-firefox-3.0.11 [3.0.10]
> [ebuild     U ] sys-fs/udev-141 [124-r2]
> [ebuild     U ] sys-fs/cryptsetup-1.0.6-r2 [1.0.5-r1]
> [blocks b     ] >=sys-fs/udev-126 (">=sys-fs/udev-126" is blocking
> sys-fs/cryptsetup-1.0.5-r1)
> 
> Total: 6 packages (5 upgrades, 1 new), Size of downloads: 55,215 kB
> Conflict: 1 block
> 
> How can I find the package that keeps pulling in vcdimager?
> 
> Thanks,
> 

Use 'emerge -avDu world --tree'

In general, 'qdepends -Q foo' will return packages that depend on foo
if you have portage-utils

-- 
Joseph Booker

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[gentoo-amd64] Re: how to find reverse dependencies?

[Duncan]

Joseph Booker <joe@neoturbine.net> posted 20090626213734.631e8110@fenrir,
excerpted below, on  Fri, 26 Jun 2009 21:37:34 -0500:

> On Fri, 26 Jun 2009 19:24:00 -0700 (PDT) Steve Herber <herber@thing.com>
> wrote:
> 
>> I removed a package recently and portage keeps wanting to put it back
>> into the system.  How can I find out why portage wants to reinstall it?

> Use 'emerge -avDu world --tree'
> 
> In general, 'qdepends -Q foo' will return packages that depend on foo if
> you have portage-utils

Tree is one way, tho it can be somewhat hard to read, particularly with 
world, due simply to the number of packages world spits out.

I don't know anything about portage-utils, but if you have gentoolkit, 
equery depends <pkg> works for what depends /on/ a package, equery 
depgraph <pkg> works for what a package depends on.  equery is a handy 
little tool.  It's worthwhile learning it. =:^)  (Read the manpage.)

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman

Re: [gentoo-amd64] how to find reverse dependencies?

[Mark Knecht]

On Fri, Jun 26, 2009 at 7:24 PM, Steve Herber<herber@thing.com> wrote:
> I removed a package recently and portage keeps wanting to put it back
> into the system.  How can I find out why portage wants to reinstall it?
> Here is a cleaned up example:
>
> emerge --ask --verbose --deep --update world
>
> Calculating dependencies... done!
> [ebuild  N    ] media-video/vcdimager-0.7.23  USE="-minimal -xml" 986 kB
> [ebuild     U ] dev-lang/php-5.2.10 [5.2.9-r2]
> [ebuild     U ] net-libs/xulrunner-1.9.0.11 [1.9.0.10]
> [ebuild     U ] www-client/mozilla-firefox-3.0.11 [3.0.10]
> [ebuild     U ] sys-fs/udev-141 [124-r2]
> [ebuild     U ] sys-fs/cryptsetup-1.0.6-r2 [1.0.5-r1]
> [blocks b     ] >=sys-fs/udev-126 (">=sys-fs/udev-126" is blocking
> sys-fs/cryptsetup-1.0.5-r1)
>
> Total: 6 packages (5 upgrades, 1 new), Size of downloads: 55,215 kB
> Conflict: 1 block
>
> How can I find the package that keeps pulling in vcdimager?
>
> Thanks,
>
> --
> Steve Herber    herber@thing.com                work: 206-221-7262
> Software Engineer, UW Medicine, IT Services     home: 425-454-2399
>
>

As Joe says emerge --tree is the most typical answer for this.

Another good one is equery depends vcdimager as it attempts to show
what use flags might have called the package in.

Hope this helps,
Mark

Re: [gentoo-amd64] how to find reverse dependencies?

[Benny Pedersen]

On Sat, June 27, 2009 04:24, Steve Herber wrote:

> How can I find the package that keeps pulling in vcdimager?

emerge --pretend --verbose --deep --tree --update world

or shourt

emerge -pvDtu world

-- 
xpoint

Re: [gentoo-amd64] how to find reverse dependencies?

[Branko Badrljica]

Benny Pedersen wrote:
> On Sat, June 27, 2009 04:24, Steve Herber wrote:
>
>   
>> How can I find the package that keeps pulling in vcdimager?
>>     
>
> emerge --pretend --verbose --deep --tree --update world
>
> or shourt
>
> emerge -pvDtu world
>
>   
Wouldn't "equery depends vcdimager" be better choice ?

Re: [gentoo-amd64] how to find reverse dependencies?

[Benny Pedersen]

On Mon, June 29, 2009 08:48, Branko Badrljica wrote:
>> emerge -pvDtu world
> Wouldn't "equery depends vcdimager" be better choice ?

maybe, i just use emerge most of the times

-- 
xpoint