TODO

   1 -*- mode: org; coding: utf-8; -*-
   2
   3 #+TITLE: What's left to do?
   4 #+STARTUP: content hidestars
   5
   6 Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
   7
   8   Copying and distribution of this file, with or without modification,
   9   are permitted in any medium without royalty provided the copyright
  10   notice and this notice are preserved.
  11
  12 * integrate needed Nix code
  13
  14 ** MAYBE Add a substituter that uses the GNUnet DHT or [[http://libswift.org][libswift]]
  15
  16 Would be neat if binaries could be pushed to and pulled from the GNUnet DHT or
  17 rather libswift (since DHTs aren’t suited for large payloads).  Guix users
  18 would sign their binaries, and define which binaries they trust.
  19
  20 Use UPnP and similar to traverse NAT, like ‘filegive’ does.
  21
  22 ** Add a remote build hook
  23
  24 Like scripts/build-remote.pl in Nix.
  25
  26 * Add `guix publish' to publish the store using Guile's web server
  27
  28 Generate narinfos and nars on the fly, upon HTTP GET requests.
  29 Ideally, extend .nix-cache-info to include the server's public key, and also
  30 reply to requests for .narinfo.sig.
  31 Optionally, use Guile-Avahi to publish the service.
  32
  33 * user interface
  34 ** Add a package.el (Emacs) back-end
  35
  36 package.el is quite monolithic, but we may be able to reuse/extend
  37 ‘package-menu-mode’ or at least ‘tabulated-list-mode’.
  38
  39 ** add guile-ncurses interface
  40
  41 * extend <package>
  42
  43 ** add ‘recommends’ field
  44
  45 For instance, glibc, binutils, gcc, and ld-wrapper would recommend each other.
  46 ‘guix package -i’ could ask interactively (?), or allow users to follow all or
  47 none of the recommendations.
  48
  49 ** add a ‘user-environment-hook’
  50
  51 This should specify builder code to be run when building a user
  52 environment with ‘guix-package’.  For instance, Texinfo’s hook would
  53 create a new ‘dir’.
  54
  55 ** extend ‘propagated-build-inputs’ with support for multiple outputs
  56
  57 #+BEGIN_SRC scheme
  58   (outputs '("out" "include"))
  59   (propagated-build-inputs
  60     `(((("i1" ,p1 "o1")
  61         ("i2" ,p2))
  62        => "include")
  63       ("i3" ,p3)))
  64 #+END_SRC
  65
  66 * synchronize non-GNU package descriptions with the [[http://directory.fsf.org][FSD]]
  67
  68 Meta-data for GNU packages, including descriptions and synopses, can be
  69 dumped from the FSD:
  70 http://directory.fsf.org/wiki?title=GNU/Export&action=purge .
  71 We could periodically synchronize with that.
  72
  73 * add a guildhall build system
  74
  75 The Guildhall is Guile’s packaging system.  It should be easy to add a
  76 ‘guildhall-build-system’ that does the right thing based on guildhall
  77 recipes.
  78
  79 * add ‘allowed-references’ in <package>
  80
  81 [[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]].
  82
  83 * union
  84
  85 Support sophisticated collision handling when building a union: check
  86 whether the colliding files are identical, honor per-package priorities,
  87 etc.
  88
  89 * add GUIX_ALLOW_EXPENSIVE_TESTS
  90
  91 Tests that need to download stuff or otherwise take a long time would only be
  92 run when that is defined.
  93
  94 * add "guix challenge"
  95
  96 Would download a substitute, and compare its contents against a (hopefully
  97 locally-built) copy.
  98
  99
 100 * guix build utils
 101 ** MAYBE Change ‘ld-wrapper’ to add RPATH for libs passed by file name
 102
 103 ** MAYBE Add equivalent to chrpath that uses [[https://gitorious.org/guile-dlhacks/guile-dlhacks/][guile-dlhacks]]
 104
 105 ** MAYBE Add a hash-rewriting thing for deep dependency replacement without rebuild
 106
 107 See [[https://github.com/NixOS/nixpkgs/commit/d1662d715514e6ef9d3dc29f132f1b3d8e608a18][Shea Levy's `replace-dependency' in Nixpkgs]].
 108
 109 * distro
 110 ** port to new GNU/Linux platforms, notably ‘mipsel64-linux’
 111 ** port to GNU/Hurd, aka. ‘i686-gnu’
 112
 113 Problems include that current glibc releases do not build on GNU/Hurd.
 114 In addition, there haven’t been stable releases of GNU Mach, MiG, and
 115 Hurd, which would be a pre-condition.
 116
 117 ** make a bootable GNU/Linux-Libre distro, with OS configuration EDSL
 118
 119 Similar in spirit to /etc/nixos/configuration.nix.