guix-devel/TODO

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-*- mode: org; coding: utf-8; -*-
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#+TITLE: What's left to do?
#+STARTUP: content hidestars
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Copyright © 2012, 2013 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
** Remove dependency on OpenSSL
The openssl command-line tool is used in libstore to sign store paths
to be exported, and to check such signatures. The signing keys are
usually in /etc/nix/signing-key.{pub,sec}. They are a PKCS#8-encoded
X.509 SubjectPublicKeyInfo. These can be decoded with the [[http://lists.gnu.org/archive/html/help-gnutls/2012-12/msg00012.html][C API of
GnuTLS]], but not yet with its Guile bindings. Theres also
gnutls_privkey_sign_data to sign, and related functions.
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** Add `guix publish' to publish the store using Guile's web server
Generate narinfos and nars on the fly, upon HTTP GET requests.
Ideally, extend .nix-cache-info to include the server's public key, and also
reply to requests for .narinfo.sig.
Optionally, use Guile-Avahi to publish the service.
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** MAYBE Add a substituter that uses the GNUnet DHT
Would be neat if binaries could be pushed to and pulled from the GNUnet
DHT. Guix users would sign their binaries, and define which binaries
they trust.
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** Add a remote build hook
Like scripts/build-remote.pl in Nix.
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* user interface
** Add a package.el (Emacs) back-end
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package.el is quite monolithic, but we may be able to reuse/extend
package-menu-mode or at least tabulated-list-mode.
** add guile-ncurses interface
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* 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>
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** add recommends field
For instance, glibc, binutils, gcc, and ld-wrapper would recommend each other.
guix package -i could ask interactively (?), or allow users to follow all or
none of the recommendations.
** 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.
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** 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
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* synchronize package descriptions with GSRC and/or the [[http://directory.fsf.org][FSD]]
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Meta-data for GNU packages, including descriptions and synopses, can be
dumped from the FSD:
http://directory.fsf.org/wiki?title=GNU/Export&action=purge .
We could periodically synchronize with that.
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See http://lists.gnu.org/archive/html/bug-guix/2013-04/msg00120.html for info
on how to synchronize with GSRC's descriptions.
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* add a guildhall build system
The Guildhall is Guiles packaging system. It should be easy to add a
guildhall-build-system that does the right thing based on guildhall
recipes.
* 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.
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* guix package
** add --list-generations, and --delete-generations
* guix build utils
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** MAYBE Change ld-wrapper to add RPATH for libs passed by file name
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** MAYBE Add equivalent to chrpath that uses [[https://gitorious.org/guile-dlhacks/guile-dlhacks/][guile-dlhacks]]
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** MAYBE Add a hash-rewriting thing for deep dependency replacement without rebuild
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See [[https://github.com/NixOS/nixpkgs/commit/d1662d715514e6ef9d3dc29f132f1b3d8e608a18][Shea Levy's `replace-dependency' in Nixpkgs]].
* distro
** 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.