[Lazarus] Installer/uninstaller on Linux for fpc/lazarus programs?

[Andreas Schneider]

Am 2019-11-20 18:14, schrieb Bo Berglund via lazarus:
> I am wondering how exactly I should package the program I am
> developing for Raspberry Pi so it can be uniformly installed and
> uninstalled on new RPi units...
>
> It is an Arm binary for RPi3 or Rpi4 type units running Raspbian
> Buster. So I could stuff the binary into /usr/bin I suppose, but it
> also needs a config file (below /etc, right?) and some data files
> which go into a new directory tree somewhere (where?).
> The dir (which needs to be created) shall be populated with some
> example files and such.
>
> And this is a pure command line application meant to be run from cron
> or possibly as a service. Not sure yet.
>
> On Windows for my previous Delphi applications I used InnoSetup but
> that is not valid on Linux of course.
>
> My aim is to get a way to install which will help the production and
> service people when we move away from using Windows PC as a platform.
>
> Needless to say I am not so familiar with everyday use/maintenance of
> Linux computers. I have only used RPi boxes for dev work and
> experimentation so far....
>
> Or should I simply write some FPC command line utility to do the job?
> Or maybe an install script and put that into a tgz file?
>
> What do people normally do?
>
> --
> Bo Berglund
> Developer in Sweden

That totally depends. Many applications are user space applications.
Treat them as such. Users are not administrators and should not require
admin rights to setup their application. I would either go with a
statically linked application that has no dependencies beyond its own
executable or if that is unavoidable pack it into an AppImage.

If the application is a system wide tool (or some daemon, service, etc.)
you will have to package it distribution specific. Focus on
CentOS/RedHat (RPM) and Debian/Ubuntu (DEB). It would also help to offer
a "simple" binary distribution (tgz) for all the other maintainers out
there to adopt them easily to their distributions and for people who
want to setup your service (again) without admin rights, as part of a
CI/CD pipeline, in docker, or whatever.

Speaking of docker: that would probably be also another good fit for a
service/daemon. That way it is completely distribution (and even OS)
agnostic.