Re: Build for Alpine Linux

[Henri Menke <henrimenke@gmail.com>]

On Wed, 2018-04-11 at 20:08 +0000, Brian Hunt wrote:
> So here's what I've got for a TODO so far to get ConTeXt working on Alpine
> Linux with musl (subject to item #6, mtx-context.lua not being found):
> 
> 1. Add the musl test to first-setup.sh
> 2. Add the same musl test to tex/setuptex
> 3. Add texlua (and texluac?) to
>   a. the setup rsync bin/ directories
>   b. the tex/texmf-linuxmusl(|-ppc|-64)
> 4. Update mtxrun
> 
> Here's code that ought to work for detecting musl in mtxrun.  Around line 3721
> of the mtxrun add:
> 
>     if find(architecture,"x86_64",1,true) then
>       platform="linux-64"
>     elseif find(architecture,"ppc",1,true) then
>       platform="linux-ppc"
>     else
>       platform="linux"
>     end
> +   if resultof("ldd --version 2>&1"):find("musl") ~= nil then
> +     platform = platform:gsub("linux", "linuxmusl")
> +   end 
> 
> 5. Note that in tex/setuptex, there's evidently no way to get the current
> script so one has to explicitly provide the TeX directory (appears to be a
> BusyBox bug).

Standard POSIX sh has no way to reliably detect sourced invocation of a script.
BusyBox uses POSIX sh underneath and thus suffers from the same limitation. See
StackOverflow for detail:
https://stackoverflow.com/questions/29832037

> 6. `context` is unable to locate `mtx-context.lua`.  Some tracker output sheds
> some light:
>   i. context --trackers=resolvers.expansions is identical
>   ii. context --trackers=resolvers.details,resolvers.details differs, with the
> output attached.  Note that to keep the comparison short I removed lines that
> differed only because `linux` had been changed to `linuxmusl`.
> 
> Will keep plugging away to see if I can determine why `mtx-context.lua` cannot
> be found on Alpine Linux.
> 
> Thanks for reading.
> 
> Brian
> 
> -- 
> from the personal account of:
> Brian M Hunt <brianmhunt@gmail.com>
> Direct: +1-289-684-4677
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