guix/TODO
Ludovic Courtès 3036a01ff7 Augment `TODO'.
2012-12-04 22:04:03 +01:00

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-*- mode: org; coding: utf-8; -*-
Copyright © 2012 Ludovic Courtès <ludo@gnu.org>
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
* integrate needed Nix code
Guix uses Nixs daemon (nix-worker, later renamed to nix-daemon) to
actually perform builds, scheduling, substitution of pre-built binaries,
and GC-related tasks. The daemon mainly uses libstore from Nix.
Integrating it in Guix itself will make Guix self-contained, thereby
simplifying our users lives.
* infrastructure
** have a Hydra instance build Guix packages
[[http://nixos.org/hydra/][Hydra]] is a continuous integration tool based on Nix. It now has
[[https://github.com/NixOS/hydra/commit/f27ae1d5663680400cb99cfb898970f34d8d21be][Guile/Guix support]], which allows “build recipes” written in Guile using
Guix to be used directly on Hydra.
For a start, we may use the instance at hydra.nixos.org, generously
provided by TU Delft. However, in the future, we may want to setup our
own instance at gnu.org.
* extend <origin>
** add OpenPGP signatures:
(origin
(method http-fetch)
(uri "http://.../foo.tgz")
(signature-uri (string-append uri ".sig"))
(signer-openpgp-fingerprint "..."))
** allow <origin> to be a derivation/package or a file
* extend <package>
** add support for search-paths
This should be passed to the build system, to extend package-specific
search path environment variableslike GUILE_LOAD_PATH, PERL5LIB,
etc.
** add a user-environment-hook
This should specify builder code to be run when building a user
environment with guix-package. For instance, Texinfos hook would
create a new dir.
** add patches there
** extend propagated-build-inputs with support for multiple outputs
#+BEGIN_SRC scheme
(outputs '("out" "include"))
(propagated-build-inputs
`(((("i1" ,p1 "o1")
("i2" ,p2))
=> "include")
("i3" ,p3)))
#+END_SRC
* support cross-compilation
Implement package-cross-derivation, and add the corresponding code in
gnu-build-system. Then, actually bootstrap a cross-compilation
environmente.g., a cross-GNU environment.
* gnu-build-system: produce a debug derivation
Set a .gnu_debuglink in the main derivations to point to the sibling
file name (only the basename, to not retain a dependency on the debug
derivation.)
For /nix/store/xyz-foobar/bin/foo, we should have
/nix/store/abc-foobar-debug/lib/nix/store/xyz-foobar/bin/foo.debug (info
"(gdb) Separate Debug Files").
Users should have a default GDB setting with ~/.guix-profile/lib/debug
as their debug-file-directory.
* build-expression->derivation: define `%system' in the builder
Would allow build expressions to have system-dependent code, like
`glibc-dynamic-linker'.
* add allowed-references in <package>
[[file:~/src/nix/src/libstore/build.cc::if%20(drv.env.find("allowedReferences")%20!%3D%20drv.env.end())%20{][See how Nix implements that internally]].
* union
Support sophisticated collision handling when building a union: check
whether the colliding files are identical, honor per-package priorities,
etc.
* guix-package
** add --roll-back
** add --list-generations, and --delete-generations
** add --upgrade
** add --list-installed and --list-available
** add --search
* guix build utils
** Add equivalent to "rm -rf"
** Add equivalent to Nixpkgs's wrapProgram
** Add equivalent to chrpath, possibly using [[https://gitorious.org/guile-dlhacks/guile-dlhacks/][guile-dlhacks]]
* distro
** choose a name! (Jinn?)
** port to new GNU/Linux platforms, notably mipsel64-linux
** port to GNU/Hurd, aka. i686-gnu
Problems include that current glibc releases do not build on GNU/Hurd.
In addition, there havent been stable releases of GNU Mach, MiG, and
Hurd, which would be a pre-condition.
** make a bootable GNU/Linux-Libre distro, with OS configuration EDSL
Similar in spirit to /etc/nixos/configuration.nix.