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1 | -*- mode: org; coding: utf-8; -*- |
2 | ||
3 | Copyright © 2012 Ludovic Courtès <ludo@gnu.org> | |
4 | ||
5 | Copying and distribution of this file, with or without modification, | |
6 | are permitted in any medium without royalty provided the copyright | |
7 | notice and this notice are preserved. | |
8 | ||
9 | * integrate needed Nix code | |
10 | ||
11 | Guix uses Nix’s daemon (‘nix-worker’, later renamed to ‘nix-daemon’) to | |
12 | actually perform builds, scheduling, substitution of pre-built binaries, | |
13 | and GC-related tasks. The daemon mainly uses ‘libstore’ from Nix. | |
14 | Integrating it in Guix itself will make Guix self-contained, thereby | |
15 | simplifying our users’ lives. | |
16 | ||
a9128eac LC |
17 | ** Remove dependency on OpenSSL |
18 | ||
19 | The ‘openssl’ command-line tool is used in libstore to sign store paths | |
20 | to be exported, and to check such signatures. The signing keys are | |
21 | usually in /etc/nix/signing-key.{pub,sec}. They are a PKCS#8-encoded | |
22 | X.509 SubjectPublicKeyInfo. These can be decoded with the [[http://lists.gnu.org/archive/html/help-gnutls/2012-12/msg00012.html][C API of | |
23 | GnuTLS]], but not yet with its Guile bindings. There’s also | |
24 | ‘gnutls_privkey_sign_data’ to sign, and related functions. | |
25 | ||
6b8875c8 LC |
26 | * infrastructure |
27 | ||
28 | ** have a Hydra instance build Guix packages | |
29 | ||
30 | [[http://nixos.org/hydra/][Hydra]] is a continuous integration tool based on Nix. It now has | |
31 | [[https://github.com/NixOS/hydra/commit/f27ae1d5663680400cb99cfb898970f34d8d21be][Guile/Guix support]], which allows “build recipes” written in Guile using | |
32 | Guix to be used directly on Hydra. | |
33 | ||
34 | For a start, we may use the instance at hydra.nixos.org, generously | |
35 | provided by TU Delft. However, in the future, we may want to setup our | |
36 | own instance at gnu.org. | |
37 | ||
38 | * extend <origin> | |
39 | ** add OpenPGP signatures: | |
40 | ||
41 | (origin | |
42 | (method http-fetch) | |
43 | (uri "http://.../foo.tgz") | |
44 | (signature-uri (string-append uri ".sig")) | |
45 | (signer-openpgp-fingerprint "...")) | |
46 | ||
47 | ** allow <origin> to be a derivation/package or a file | |
48 | ||
49 | * extend <package> | |
50 | ||
51 | ** add support for ‘search-paths’ | |
52 | ||
53 | This should be passed to the build system, to extend package-specific | |
54 | search path environment variables–like ‘GUILE_LOAD_PATH’, ‘PERL5LIB’, | |
55 | etc. | |
56 | ||
57 | ** add a ‘user-environment-hook’ | |
58 | ||
59 | This should specify builder code to be run when building a user | |
60 | environment with ‘guix-package’. For instance, Texinfo’s hook would | |
61 | create a new ‘dir’. | |
62 | ||
3036a01f LC |
63 | ** add ‘patches’ there |
64 | ||
65 | ** extend ‘propagated-build-inputs’ with support for multiple outputs | |
66 | ||
67 | #+BEGIN_SRC scheme | |
68 | (outputs '("out" "include")) | |
69 | (propagated-build-inputs | |
70 | `(((("i1" ,p1 "o1") | |
71 | ("i2" ,p2)) | |
72 | => "include") | |
73 | ("i3" ,p3))) | |
74 | #+END_SRC | |
75 | ||
6b8875c8 LC |
76 | * support cross-compilation |
77 | ||
78 | Implement ‘package-cross-derivation’, and add the corresponding code in | |
79 | ‘gnu-build-system’. Then, actually bootstrap a cross-compilation | |
80 | environment–e.g., a cross-GNU environment. | |
81 | ||
82 | * gnu-build-system: produce a ‘debug’ derivation | |
83 | ||
84 | Set a .gnu_debuglink in the main derivations to point to the sibling | |
85 | file name (only the basename, to not retain a dependency on the ‘debug’ | |
86 | derivation.) | |
87 | ||
88 | For /nix/store/xyz-foobar/bin/foo, we should have | |
89 | /nix/store/abc-foobar-debug/lib/nix/store/xyz-foobar/bin/foo.debug (info | |
90 | "(gdb) Separate Debug Files"). | |
91 | ||
92 | Users should have a default GDB setting with ~/.guix-profile/lib/debug | |
93 | as their ‘debug-file-directory’. | |
94 | ||
95 | * build-expression->derivation: define `%system' in the builder | |
96 | ||
97 | Would allow build expressions to have system-dependent code, like | |
98 | `glibc-dynamic-linker'. | |
99 | ||
100 | * add ‘allowed-references’ in <package> | |
101 | ||
102 | [[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]]. | |
103 | ||
104 | ||
105 | * union | |
106 | ||
107 | Support sophisticated collision handling when building a union: check | |
108 | whether the colliding files are identical, honor per-package priorities, | |
109 | etc. | |
110 | ||
111 | * guix-package | |
112 | ||
113 | ** add ‘--roll-back’ | |
114 | ** add ‘--list-generations’, and ‘--delete-generations’ | |
115 | ** add ‘--upgrade’ | |
6b8875c8 LC |
116 | ** add ‘--search’ |
117 | ||
118 | * guix build utils | |
119 | ** Add equivalent to "rm -rf" | |
120 | ** Add equivalent to Nixpkgs's ‘wrapProgram’ | |
121 | ** Add equivalent to chrpath, possibly using [[https://gitorious.org/guile-dlhacks/guile-dlhacks/][guile-dlhacks]] | |
122 | ||
123 | * distro | |
124 | ** choose a name! (Jinn?) | |
125 | ** port to new GNU/Linux platforms, notably ‘mipsel64-linux’ | |
126 | ** port to GNU/Hurd, aka. ‘i686-gnu’ | |
127 | ||
128 | Problems include that current glibc releases do not build on GNU/Hurd. | |
129 | In addition, there haven’t been stable releases of GNU Mach, MiG, and | |
130 | Hurd, which would be a pre-condition. | |
131 | ||
132 | ** make a bootable GNU/Linux-Libre distro, with OS configuration EDSL | |
133 | ||
134 | Similar in spirit to /etc/nixos/configuration.nix. |