Bug 233249 - Uninstall unneeded dependencies
Uninstall unneeded dependencies
Status: CLOSED WONTFIX
Product: Fedora
Classification: Fedora
Component: rpm (Show other bugs)
7
All Linux
medium Severity medium
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Assigned To: Panu Matilainen
: Reopened
: 221151 (view as bug list)
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2007-03-21 04:23 EDT by Viktor
Modified: 2008-06-16 21:16 EDT (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2008-06-16 21:16:47 EDT
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Description Viktor 2007-03-21 04:23:24 EDT
I'm not sure if this should be aimed at rpm or yum, anyway:
I have a suggestion that during installation, rpm should store a refcount for
every package that is merely installed due to dependency. For example, when you
install Abiword, many dependencies are needed. But when you later uninstall
AbiWord, most of those dependencies will remain installed - presumably to no
use, only wasting disk space.
With the refcount, rpm could detect that the dependencies are no longer needed.
And so it would remove them too.
Of course this would only happen if the refcount decreases to zero, so if there
are other applications requiring a certain package, it would not be removed.
Comment 1 Paul Nasrat 2007-03-21 09:47:54 EDT
yum install yum-utils
man package-cleanup

       --leaves
              List leaf nodes in the local RPM database.  Leaf nodes are  RPMs
              that are not relied upon by any other RPM.

You can use the package-cleanup --leaves option to automate removal.
Comment 2 Viktor 2007-03-27 04:32:01 EDT
Thanks, but that program doesn't seem smart enough. It simply lists all packages
that no other package depend on. For example, if I have removed abiword and then
also want its dependencies (as listed below) to be removed, I would need to use
the --all switch to have any of them listed.
And that is too dangerous - it would imply removing also vital applications like
nautilus, evolution and pirut.

So it doesn't do what I requested, i.e. when you install a package, store a
reference for every package that was suggested by yum as a dependency to that
primary package. Thus, if you just run `yum install gtkmathview` there would be
no refcount added to gtkmathview. But if you run `yum install abiword`,
gtkmathview is required as a dependency. Then yum should store a refcount on
gtkmathview linked to abiword. Running `yum remove abiword` later, you could be
asked if to remove `gtkmathview` at the same time (if the refcount on
gtkmathview decreases to zero).
That method would be the most accurate way to decide whether a package is really
needed or not. After you've removed abiword, neither of evolution or gtkmathview
is a dependency. But there is a significant difference between those two
packages, despite that they both appear in the list of `package-cleanup --leaves
--all`.

 abiword                 x86_64     1:2.4.6-1.fc6    extras            6.3 M
Installing for dependencies:
 enchant                 x86_64     1:1.3.0-1.fc6    extras            126 k
 goffice                 x86_64     0.2.1-2.fc6      extras            1.3 M
 gtkmathview             x86_64     0.7.6-5.fc6      extras            872 k
 link-grammar            x86_64     4.2.2-2.fc6      extras            355 k
 mathml-fonts            noarch     1.0-21.fc6       extras            190 k
 ots                     x86_64     0.4.2-10.fc6     extras             52 k
Comment 3 Viktor 2007-04-03 07:30:20 EDT
What I mean is, there should be like a transaction control. So that after you
uninstall a package, the set of installed packages should look exactly as it did
before the install.
Comment 4 Jeff Johnson 2007-04-03 07:43:44 EDT
All installed and removed (if %_repackage_all_erasues 1) packages contain a unique transaction id.

Installed transaction id's are indexed, and the installed packages added by a transaction
can be queried by id using --tid 0x12345678.

Transactions can be removed by using --rollback.

Packages installed by rpm-4.4.4 and later also carry the name of any packages removed
while installing as a "back link":
    $ rpm -q --blink zlib
    zlib-1.2.3-10.fc7.i386.rpm
            <= zlib-1.2.3-7.fc7.i386.rpm

Your scheme of adding a link to parent to dependent package will not work as described because
dependencies are many-to-many, not one-to-one. In other wods, not only abiword may require
gtkmathview, and abiword may require previously installed packages that were installed for
other reasons.

UPSTREAM

Comment 5 Red Hat Bugzilla 2007-08-21 01:32:44 EDT
User pnasrat@redhat.com's account has been closed
Comment 6 Panu Matilainen 2007-08-22 02:30:24 EDT
Reassigning to owner after bugzilla made a mess, sorry about the noise...
Comment 7 Till Maas 2008-01-05 20:38:44 EST
Afaik this bug is still present in Fedora 7 and beyond.
Comment 8 Panu Matilainen 2008-04-01 07:01:13 EDT
*** Bug 221151 has been marked as a duplicate of this bug. ***
Comment 9 Bug Zapper 2008-05-14 08:11:15 EDT
This message is a reminder that Fedora 7 is nearing the end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 7. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '7'.

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Comment 10 Bug Zapper 2008-06-16 21:16:46 EDT
Fedora 7 changed to end-of-life (EOL) status on June 13, 2008. 
Fedora 7 is no longer maintained, which means that it will not 
receive any further security or bug fix updates. As a result we 
are closing this bug. 

If you can reproduce this bug against a currently maintained version 
of Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.

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