Bug 1190854 - allow overriding $arch and $basearch via CLI
Summary: allow overriding $arch and $basearch via CLI
Alias: None
Product: Fedora
Classification: Fedora
Component: dnf
Version: rawhide
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: rpm-software-management
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: 1427604
TreeView+ depends on / blocked
Reported: 2015-02-09 19:22 UTC by Hristo Venev
Modified: 2017-07-27 12:57 UTC (History)
13 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2017-07-27 12:57:49 UTC

Attachments (Terms of Use)
Set arch and basearch through YumConf (2.17 KB, patch)
2015-02-11 07:51 UTC, Hristo Venev
no flags Details | Diff

System ID Priority Status Summary Last Updated
Red Hat Bugzilla 1211253 None CLOSED [RFE] Provide mechanism to specify custom repository variables from command line 2019-11-05 18:10:04 UTC
Red Hat Bugzilla 1241383 None NEW Review Request: mkchroot - Fedora Chroot Directory Maker 2019-11-05 18:10:04 UTC

Internal Links: 1211253 1241383

Description Hristo Venev 2015-02-09 19:22:44 UTC
The current logic ALWAYS uses data for the current system. This is wrong.

It is impossible to set $arch to armv7hnl or armv7hl because it's not that easy to fake /proc/cpuinfo.

I think the arch parts should be moved out of dnf/conf/substitutions.py and into dnf/yum/config.py

Setting arch should set the corresponding basearch automatically (makes configuration easier).

Should I submit a patch?

Comment 1 Jan Zeleny 2015-02-10 07:37:48 UTC
Please send your use case first. Why do you need to install arch-incompatible packages? That's an action you should not take unless you really know what are you doing. So far I have heard just about a few rel-eng use cases but addressing them will more likely happen in the underlying libraries.

Comment 2 Hristo Venev 2015-02-11 07:51:33 UTC
Created attachment 990366 [details]
Set arch and basearch through YumConf

I want to install arch-incompatible packages in another root. It would be a good idea to support this in the dnf cli because it's very easy to use, for example in shell scripts. Using setarch does not always work (armv7hnl and armv7hl).

dnf --setopt arch=i686 --installroot=...

This would also make setting arch and basearch a bit easier:
can become:

Comment 3 Radek Holy 2015-02-11 07:58:03 UTC
Do I understand it correctly that the install root is mounted from another system running on ARM?

Comment 4 Hristo Venev 2015-02-11 08:27:56 UTC
Mounted on the other system via NFS or copied to it. Most systems will be i686 or x86_64 but it would be good to support all architectures. I think the setarch approach is ugly.

Comment 5 Jan Zeleny 2015-02-12 08:08:23 UTC
I think inspecting the rel-eng use case for this feature is the right next step. Perhaps there is some overlap between the two, in which case it might be better to address the specific use case rather than doing some general implementation.

Comment 6 Jaroslav Reznik 2015-03-03 16:52:01 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle.
Changing version to '22'.

More information and reason for this action is here:

Comment 7 Egor Zakharov 2015-04-08 23:17:26 UTC
This can be useful not only in #comment2 case.

As copr repositories can not generate multilib packages for x86_64, it will be useful to set arch temporary to i686, to install i686 version of some library.

Comment 8 Honza Silhan 2015-07-20 13:43:55 UTC
Mirek, how mock changes arch in DNF? through variables?

Comment 9 Miroslav Suchý 2015-07-20 14:06:59 UTC
mock use this code:

_libc = ctypes.cdll.LoadLibrary(None)
_libc.personality.argtypes = [ctypes.c_ulong]
_libc.personality.restype = ctypes.c_int
_libc.unshare.argtypes = [ctypes.c_int,]
_libc.unshare.restype = ctypes.c_int

personality_defs = {
    'x86_64': PER_LINUX, 'ppc64': PER_LINUX, 'sparc64': PER_LINUX,
    'i386': PER_LINUX32, 'i586': PER_LINUX32, 'i686': PER_LINUX32,
    'ppc': PER_LINUX32, 'sparc': PER_LINUX32, 'sparcv9': PER_LINUX32,
    'ia64' : PER_LINUX, 'alpha' : PER_LINUX,
    's390' : PER_LINUX32, 's390x' : PER_LINUX,

if per is None or per in ('noarch',):
if personality_defs.get(per, None) is None:
res = _libc.personality(personality_defs[per])

and then call normally (i.e. as subprocess) dnf command.

Comment 10 Fedora Admin XMLRPC Client 2016-07-08 09:32:39 UTC
This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

Comment 11 Fedora End Of Life 2016-07-19 12:47:56 UTC
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 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. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this

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

Comment 12 Jaroslav Mracek 2017-07-27 12:57:49 UTC
I think that new conf options ``arch`` and ``basearch`` in dnf-2.6.2-1 should provide requested functionality. If not, please reopen the bug report.

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