Help a lot, thanks for clarifying things
2016-03-02 16:49 GMT+01:00 Todd Zullinger <t...@pobox.com>:
> Tim wrote:
>
>> On Wed, 2016-03-02 at 05:40 +0100, thibaut noah wrote:
>>
>>> I think i misunderstand things on version numbers, thought 2:2.5.0-6
>>> means version 2.2... From what you say i have the feeling that i might be
>>> wrong about this.
>>>
>>
>> epoch:version
>>
>> epoch 2 version 2.5.0-6
>>
>> Go by the decimals, file version something *point* something, has to have
>> decimals in it. I've never got a grip on why there's hyphens in the
>> version numbers, though.
>>
>
> In the example above, 2.5.0-6 is ${version}-${release}. The release field
> is used in an rpm whenever the package is changed, which might happen
> without updating the version. It should typically start at 1 and increment
> for each new package, resetting to 1 when the version is updated.
>
> As an example, I package foo-1.0. The rpm version-release will be 1.0-1.
> After I push it to the repos, someone finds a bug in the packaging (say I
> forgot to include a file). When I fix the package, it will still be
> foo-1.0, but the release is incremented so it's now 1.0-2. When foo 1.1 or
> 2.0 is released upstream, the next package would be 1.1-1 or 2.0-1.
>
> The rpm --queryformat option (--qf for short) might also be useful to this
> discussion. If you want to query just the version without the epoch,
> release, etc. you can use --qf to do so.
>
> $ rpm -q --qf '%{version}\n' qemu-kvm
> 2.3.1
>
> All the tags available to the --queryformat option can be shown with rpm
> --querytags.
>
> I realize that using rpm -q --qf might not be all that intuitive for new
> users, but it is a handy option.
>
> It's also worth noting that repoquery (or now dnf repoquery, I guess)
> understands the --qf option (with the addition of the repoid tag to show
> the repo where a package was found).
>
> $ dnf -d0 -e0 repoquery --qf '%{name} %{version} (%{repoid})' qemu-kvm
> qemu-kvm 2.3.0 (fedora)
> qemu-kvm 2.3.1 (@System)
> qemu-kvm 2.3.1 (updates)
>
> Hope this helps,
>
> --
> Todd
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Liberty is always dangerous, but it is the safest thing we have.
> -- Harry Emerson Fosdick
>
>
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