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bug#27037: systemd service files installed by guix 0.13.0 cannot used by

From: 藍挺瑋
Subject: bug#27037: systemd service files installed by guix 0.13.0 cannot used by other distributions
Date: Mon, 29 May 2017 22:19:58 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.0

Leo Famulari 於 西元2017年05月25日 06:07 寫道:
On Wed, May 24, 2017 at 11:37:27PM +0800, 藍挺瑋 wrote:
Leo Famulari 於 西元2017年05月24日 00:16 寫道:
I'm a little confused: is there a situation where Guix is not installed
but '/usr/bin/guix-daemon' exists?

This can happen with source installation. 'make install' installs
/usr/bin/guix* but not /var/guix. /var/guix doesn't exist until guix-daemon
is started.

I see. We discussed this use case previously, which led to the change
which caused your issue:


In short, we decided to break this for `make install` since we didn't
come up with a better solution at the time.

The path '/var/guix/profiles/per-user/root/guix-profile/bin/guix-daemon'
is guaranteed to exist if you followed the instructions in Binary
Installation [0], which is, as far as I know, the most common way to
install Guix on other distros. So, I think this path is appropriate for
the basic service file we provide.

I think you mean that the systemd service files included in Guix are only
intended to be used with binary installation process. Do you mean that using
them with traditional 'make install' installation is not supported?

It's de facto unsupported, since it's not working :) But, I think we
should address this use case, since it is causing problems for
downstream packagers.

Yes, I am packaging Guix for Arch and Fedora, and I use the systemd service
files provided by Guix in my packages since version 0.8.3. If doing so is
never supported, I can make my own service files like what I did for version
0.6 to 0.8.2 and I think this bug can be closed.

I do think you should look into tailoring a service file to those
systems; you might be able to provide Guix on those systems in a more
integrated or idiomatic way.

I updated my packages to install two systemd service files for guix-daemon to allow users to choose between /usr/bin/guix-daemon and /var/guix/profiles/per-user/root/guix-profile/bin/guix-daemon.

However, we also try to offer upstream service files in the packages
offered by Guix, so I'd like to find a way to support both the binary
installation and `make install` use cases simultaneously.

Unless somebody proposes a fix in the meantime, I'll look into this more
closely before the next release.

Is it possible to resolve it by providing a configure option to choose between two versions of systemd service files, so guix binary tarballs can use /var/guix/profiles but packages of other distributions can use /usr/bin?

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