Mailinglist Archive: opensuse-softwaremgmt (5 mails)

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[softwaremgmt] Re: zypper questions (alias vs. name and other issues)
  • From: Jan Kupec <jkupec@xxxxxxx>
  • Date: Wed, 16 Apr 2008 17:19:22 +0200
  • Message-id: <480618FA.2040608@xxxxxxx>
i'm forwarding answers to some zypper question as they seem to be FAQ.
I'll put some of them to man page/wiki, but some point to issues that
need to be fixed.

Frank Sundermeyer wrote:
Hi Jan,

I am maintaining the zypper chapter for the openSUSE 11.0 manual. There
are some things I haven't fully understood and I hope you can help me.

sure :O)

I am using 11.0 Alpha 3+ with zypper 0.10.5.


If I add

http://download.opensuse.org/distribution/SL-OSS-factory/inst-source/
(Main Repository (OSS))

with _YaST_ (via Software Repositories -> Community Repositories) it
shows up like this (shortened the URl):

bourbaki:~ # zypper repos
# | Ena | Ref |Type | Alias | Name
--+-----+-----+-------+--------------------------+--------------------
1 | Yes | Yes | yast2 | openSUSE-DVD 11.0 | openSUSE-DVD 11.0
2 | Yes | Yes | yast2 | http://.../inst-source/ | Main Repository (OSS)


1. Question: What exactly is the "Name"? Why is the URl listed under
Alias?

Alias is both a shorthand for Name and a unique identifier of the
repository. While Alias is not exposed to the user by YaST (there's no
need to), it is used in zypper in the repository handling commands and
in --repo option as one way to specify the repository (the other two way
are by number in the 'zypper repos' list and by URI.

YaST currently internally uses URI as the Alias which is a bit
unfortunate and creates confusion for zypper newbies. I'll ask YaST
folks to use something different instead (e.g. "repoX" where X would be
a unique number).

If I delete this very repository by URl

bourbaki:~ # zypper rr
http://download.opensuse.org/distribution/SL-OSS-factory/inst-source/
* Removing repository 'Main Repository (OSS)'
Repository 'Main Repository (OSS)' has been removed.

everything is fine.

<cut>

If I manually add the same repository from above with

bourbaki:~ # zypper ar
http://download.opensuse.org/distribution/SL-OSS-factory/inst-source/
"foobar"
* Adding repository 'foobar'
Repository 'foobar' successfully added
Enabled: Yes
Autorefresh: No
URL:
http://download.opensuse.org/distribution/SL-OSS-factory/inst-source/

It shows up quite differently:

bourbaki:~ # zypper repos
# | Enabled | Refresh | Type | Alias | Name
--+---------+---------+-------+-------------------+------------------
1 | Yes | Yes | yast2 | openSUSE-DVD 11.0 | openSUSE-DVD 11.0
2 | Yes | No | NONE | foobar | foobar

Yes, zypper currently has no way to specify the Name when adding
repository (except for adding it via a .repo file) and when no Name is
known, the alias is shown instead of it. The Alias is always required.

hmm. If I

bourbaki:~ # zypper ar --check

http://download.opensuse.org/repositories/home:/thomas-schraitle/openSUSE_Factory\
toms
* Adding repository 'toms'
Repository 'toms' successfully added
Enabled: Yes
Autorefresh: No
URL:

http://download.opensuse.org/repositories/home:/thomas-schraitle/openSUSE_Factory

bourbaki:~ # zypper repos
# | Enabled | Refresh | Type | Alias | Name
--+---------+---------+--------+-------------------+------------------
1 | Yes | Yes | yast2 | openSUSE-DVD 11.0 | openSUSE-DVD 11.0
2 | Yes | No | rpm-md | toms | toms

the official name of the Repository is _not_ used, although it is
specified in

http://download.opensuse.org/repositories/home:/thomas-schraitle/openSUSE_Factory/home:thomas-schraitle.repo:

[home_thomas-schraitle]
name=Thomas Schraitle's Home Project (openSUSE_Factory)

AFAIK, placement of .repo files to the reporitory root has not (yet)
been established as a standard. Zypper can't just detect them and take
whatever name it can get from them. If it's not a standard, people are
free to put any .repo files in their repos. However it would be a good
idea to support this! Any opinions/information from the software
management people?


3. Questions:
Alias and Name are the same - is this a bug? What exactly is "Name"?

See above.

How can I turn on Autorefresh with zypper?

zypper modifyrepo --refresh <alias|#|URI>

How do I determine a repository's URl?

old way: 'zypper -v repos'
I recently changed this (for zypper 0.11.1), see zypper help repos.
new way: 'zypper repos -u' or 'zypper repos -d'

Should'nt zypper be able to determine the repository type
automatically? (it is listed as NONE since I did not specified it
with "-t yast2")

Yes but it depends on what you want. You can tell zypper to 'probe'
repository when adding it, but you can also add it without accessing the
internet at all. You decide either by editing /etc/zypp/zypp.conf (see
'repo.add.probe' item; affects also YaST) or by specifying --check or
--no-check option to the addrepo command.

If the repository is not probed or checked when adding it, it will get
probed when you will try to use it for the first time (with some other
command like refresh or install). Then, if the type of the repository is
figured out, it will get stored and you will see the type in the repo
list. (Note however that the 'plaindir' can be automatically figured
out, if you want to use it, you have to use --type plaindir).

BTW i noticed we use --nocheck instead of --no-check. I'll correct that
to be consistent with other boolean options. (already done).

However removing with zypper rr by URl _and_ Alias works, when the
repositoty is added with zypper and not by YaST.

It should work for both.

<cut>

(YaST adds an "_1" to an already existing alias but hides this from the
user (the "_1" is not shown in the Configured Software repositories
Overview) - this is IMHO a very bad solution)

I'm not sure.. YaST users should not care what alias has been used. As
for notifying the user about adding the very same repo twice, we need to
invent another means to do this. We are already thinking of this.

Terminology: When adding a repository with zypper, I need to specify
* URl
* Alias
when adding a repository with YaST, I need to specify
* Repository name (actually the alias)

No no, it really is the Name in this case! The Name is whathever you
want to name it. Alias is used only internally by YaST.

* URl

5. Question: Is it possible to use the same terms in YaST and zypper?

Hmm.. i don't know. For zypper as a command line tool the alias is a
means to manipulate the repos. YaST users manipulate them by clicking in
the GUI. Name servers in both YaST and zypper as an
arbitrary/descriptive string for the user. It is just a label, has no
other meaning.

6. More questions:
How do I specify URls to cd, dvd, network sources, local directory?
Neither the man page nor zypper's help output provide any hints

Hm.. thanx for pointing this out. I will document it both in man page
and the wiki. For now, see http://en.opensuse.org/Libzypp/API/Url.

Cheers,

jano


see also:
https://bugzilla.novell.com/show_bug.cgi?id=373167
https://bugzilla.novell.com/show_bug.cgi?id=364391

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