Mark H Weaver <mhw@netris.org> skribis:

> ludo@gnu.org (Ludovic Courtès) writes:

[...]

>> Currently there’s no Bash in the initrd.  Should we add one?  Our
>> ‘bash-static’ package takes 1.4 MiB (I don’t think we can make it
>> smaller.)
>
> I'm not sure it would help much without also adding 'coreutils'.

Good point.

>> Another idea that comes to mind: what about providing a “shell” language
>> in Guile?  It would automatically tokenize what the user types in and
>> convert it to (system* …), plus it would have a few built-in commands
>> like ‘cd’ and ‘ls’.
>
> I like the idea of having something like this in Guile, but I'm not sure
> we should rush to implement a half-baked solution.

OTOH, hacking it is very tempting, like:

--8<---------------cut here---------------start------------->8---
scheme@(guile-user)> ,use (guix build bournish)
scheme@(guile-user)> ,bournish
Happy hacking with Bournish!  To switch back, type `,L scheme'.
bournish@(guile-user)> ls
.                         gnu-dist.go               r-build-system.go         
..                        gnu-dist.scm              r-build-system.scm        
activation.scm~           gnu-dist.scm~             relocate.scm~             
bournish.scm              gnu.scm~                  rpath.go                  
bournish.scm~             graft.go                  rpath.scm                 
cmake-build-system.go     graft.scm                 rpath.scm~                
cmake-build-system.scm    graft.scm~                ruby-build-system.go      
cvs.go                    graft.scm.115             ruby-build-system.scm     
cvs.scm                   graft.scm.bak             ruby-build-system.scm.orig
download.go               gremlin.go                ruby-build-system.scm.rej 
download.scm              gremlin.scm               store-copy.go             
download.scm~             gremlin.scm~              store-copy.scm            
download.scm.bak          haskell-build-system.go   store-copy.scm~           
emacs-build-system.go     haskell-build-system.scm  svn.go                    
emacs-build-system.scm    http.scm~                 svn.scm                   
emacs-utils.go            install.scm~              syscalls.go               
emacs-utils.scm           linux-initrd.scm~         syscalls.scm              
ftp.scm~                  perl-build-system.go      syscalls.scm~             
git.go                    perl-build-system.scm     union.go                  
git.scm                   perl-build-system.scm~    union.scm                 
git.scm~                  profile.go                union.scm~                
glib-or-gtk-build-system.gprofile.scm~              url.scm~                  
glib-or-gtk-build-system.sprofiles.go               utils.go                  
gnome-build-system.scm    profiles.scm              utils.scm                 
gnome-build-system.scm~   profiles.scm~             utils.scm~                
gnu-build-system.go       pull.go                   vm.scm~                   
gnu-build-system.scm      pull.scm                  waf-build-system.go       
gnu-build-system.scm~     pull.scm~                 waf-build-system.scm      
gnu-build-system.scm.bak  python-build-system.go                              
gnu-cross-build.scm~      python-build-system.scm                             
bournish@(guile-user)> cd /
bournish@(guile-user)> pwd
$2 = "/"
bournish@(guile-user)> echo $PATH $LANGUAGE
$3 = ("/home/ludo/soft/bin:/home/ludo/.opam/system/bin:/home/ludo/.guix-profile/bin:/home/ludo/.guix-profile/sbin:/run/setuid-programs:/run/current-system/profile/bin:/run/current-system/profile/sbin" "eo")
bournish@(guile-user)> touch --version
touch (GNU coreutils) 8.24
Copyright © 2015 Free Software Foundation, Inc.
Ĉi tiu estas libera programaro: vi rajtas ĝin ŝanĝi kaj redistribui.
La ĝusta permesilo estas GPLv3+: GNU GPL versio 3 aŭ sekva;
por la kompleta (angla) teksto vidu <http://gnu.org/licenses/gpl.html>.
Ĉi tiu programaro ne garantiatas, ene de la limoj de la leĝo.

Verkita de Paul Rubin, Arnold Robbins, Jim Kingdon,
David MacKenzie kaj Randy Smith.
$4 = 0
bournish@(guile-user)> ,L scheme
Happy hacking with Scheme!  To switch back, type `,L bournish'.
--8<---------------cut here---------------end--------------->8---

:-)

The point is, if we can allow users to avoid typing in parentheses and
long procedure names and quoted argument lists when all they want is to
run fsck, we should do that.

> When we have something decent along the lines of Scsh, then
> definitely!

Scsh makes it super easy to deal with Unix processes, redirections, and
all that (it would be awesome to use it on the build side), but AFAIK it
doesn’t try to provide a Bourne-like interface, which is what we need
here.

So, WDYT?  :-)

Ludo’.