Re: just a friendly request

On 16. feb. 2016 12:10, Lucas C. Villa Real wrote:
> Greetings,
>
> I have been wanting for a while to make an announcement that directly
> relates to your question, but didn't do it yet because first I wanted to
> release a new version of the kernel recipe so that users could test this
> new feature. Anyhow, let me explain to you how it works.
>
> In GoboLinux, each program's dependencies are listed under
> /Programs/AppName/AppVersion/Resources/Dependencies. That file has a syntax
> that looks like this:
>
>    DepName1
>    DepName2 Version
>    DepName3 >= Version
>    DepName4 >= Version1, <= Version2
>
> In the first line, we're simply stating that DepName1 must be present in
> the system. In the second, we know for sure that the program will work if
> the system has that particular Version of DepName2 installed. The third and
> fourth lines state that as long as a particular range of dependencies are
> installed, the program will do all right. We have a parser for the
> Dependencies file that identifies which version of installed
> libraries/programs match the requirements.
>
> Having this background in mind, there's a new GoboLinux tool called Runner.
> Runner uses that Dependencies parser to figure out which packages are
> needed for a specific program. It then creates a private namespace for that
> program (cloning the current namespace) and creates an overlay mount on top
> of that namespace containing links to all returned dependencies' entries at
> /Programs. Using the same example as above, when you invoke 'Runner
> program_name', you will end up with a virtual /System/Index/lib that looks
> like this:
>
> /System/Index/lib (usual contents)
> + /Programs/DepName/Current/lib
> + /Programs/DepName2/Version/lib
> + /Programs/DepName3/Version
> + /Programs/DepName4/Some_version_between_1_and_2
>
> Of course, /lib, /usr/lib, and /usr/local/lib are all symlinks to
> /System/Index/lib, so the private namespace will be reflected on these
> paths too.
>
> The way I see it, the approach used by Runner is more elegant than
> modulefiles and LD_LIBRARY_PATH tweaks, as the shell environment of the
> caller does not need to be changed. It is also possible to run programs
> whose dependencies are completely detached (or disabled) from
> /System/Index/lib.
>
> Runner needs at least Linux 4.0.0 to run, as it depends on the overlay
> filesystem. I should release a new recipe for that kernel in the coming
> days so that users can try it out and report their findings. The source
> code for the tool is on github at https://github.com/gobolinux/Scripts.
>
> Lucas
>

Inspired by Nix i take it?