188 lines
6.5 KiB
Org Mode
188 lines
6.5 KiB
Org Mode
-*- mode: org; coding: utf-8; -*-
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Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved.
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* integrate needed Nix code
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Guix uses Nix’s daemon (‘nix-worker’, later renamed to ‘nix-daemon’) to
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actually perform builds, scheduling, substitution of pre-built binaries,
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and GC-related tasks. The daemon mainly uses ‘libstore’ from Nix.
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Integrating it in Guix itself will make Guix self-contained, thereby
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simplifying our users’ lives.
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** Remove dependency on OpenSSL
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The ‘openssl’ command-line tool is used in libstore to sign store paths
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to be exported, and to check such signatures. The signing keys are
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usually in /etc/nix/signing-key.{pub,sec}. They are a PKCS#8-encoded
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X.509 SubjectPublicKeyInfo. These can be decoded with the [[http://lists.gnu.org/archive/html/help-gnutls/2012-12/msg00012.html][C API of
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GnuTLS]], but not yet with its Guile bindings. There’s also
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‘gnutls_privkey_sign_data’ to sign, and related functions.
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** Add a binary cache substituter
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Like scripts/download-from-binary-cache.pl in Nix, but written in
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Scheme. Substituters allow pre-built binaries to be downloaded when
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they are available from a trusted source.
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** MAYBE Add a substituter that uses the GNUnet DHT
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Would be neat if binaries could be pushed to and pulled from the GNUnet
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DHT. Guix users would sign their binaries, and define which binaries
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they trust.
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** Add a remote build hook
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Like scripts/build-remote.pl in Nix.
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* infrastructure
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** have a Hydra instance build Guix packages
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[[http://nixos.org/hydra/][Hydra]] is a continuous integration tool based on Nix. It now has
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[[https://github.com/NixOS/hydra/commit/f27ae1d5663680400cb99cfb898970f34d8d21be][Guile/Guix support]], which allows “build recipes” written in Guile using
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Guix to be used directly on Hydra.
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For a start, we may use the instance at hydra.nixos.org, generously
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provided by TU Delft. However, in the future, we may want to setup our
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own instance at gnu.org.
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* add guix-pull
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A tool that fetches the latest code from [[http://git.savannah.gnu.org/cgit/guix.git/snapshot/guix-master.tar.gz][cgit]], builds a derivation that
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unpacks it, copies only .scm files (this excludes guix/config.in) and
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compiles it, and then links to it from ~/.local/guix/latest . Change
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guix-build and guix-package to have that directory first in their load
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path.
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* user interface
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** Add a package.el (Emacs) back-end
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Unfortunately package.el is monolithic, so most likely we’d have to
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write a new one based on it, as opposed to actually using it.
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* extend <origin>
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** add OpenPGP signatures:
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(origin
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(method http-fetch)
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(uri "http://.../foo.tgz")
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(signature-uri (string-append uri ".sig"))
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(signer-openpgp-fingerprint "..."))
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** allow <origin> to be a derivation/package or a file
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* extend <package>
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** add support for ‘search-paths’
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This should be passed to the build system, to extend package-specific
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search path environment variables–like ‘GUILE_LOAD_PATH’, ‘PERL5LIB’,
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etc.
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** add a ‘user-environment-hook’
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This should specify builder code to be run when building a user
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environment with ‘guix-package’. For instance, Texinfo’s hook would
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create a new ‘dir’.
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** add ‘patches’ there
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** extend ‘propagated-build-inputs’ with support for multiple outputs
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#+BEGIN_SRC scheme
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(outputs '("out" "include"))
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(propagated-build-inputs
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`(((("i1" ,p1 "o1")
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("i2" ,p2))
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=> "include")
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("i3" ,p3)))
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#+END_SRC
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* synchronize package descriptions with the [[http://directory.fsf.org][FSD]] and/or the Womb
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Meta-data for GNU packages, including descriptions and synopses, can be
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dumped from the FSD:
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http://directory.fsf.org/wiki?title=GNU/Export&action=purge .
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We could periodically synchronize with that.
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The [[./guix/gnu-maintenance.scm][Womb]] also contains synopses for all the GNU packages.
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* support cross-compilation
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Implement ‘package-cross-derivation’, and add the corresponding code in
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‘gnu-build-system’. Then, actually bootstrap a cross-compilation
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environment–e.g., a cross-GNU environment.
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* add a guildhall build system
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The Guildhall is Guile’s packaging system. It should be easy to add a
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‘guildhall-build-system’ that does the right thing based on guildhall
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recipes.
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* gnu-build-system: produce a ‘debug’ derivation
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Set a .gnu_debuglink in the main derivations to point to the sibling
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file name (only the basename, to not retain a dependency on the ‘debug’
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derivation.)
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For /nix/store/xyz-foobar/bin/foo, we should have
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/nix/store/abc-foobar-debug/lib/nix/store/xyz-foobar/bin/foo.debug (info
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"(gdb) Separate Debug Files").
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Users should have a default GDB setting with ~/.guix-profile/lib/debug
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as their ‘debug-file-directory’.
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* build-expression->derivation: define `%system' in the builder
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Would allow build expressions to have system-dependent code, like
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`glibc-dynamic-linker'.
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* add ‘allowed-references’ in <package>
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[[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]].
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* union
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Support sophisticated collision handling when building a union: check
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whether the colliding files are identical, honor per-package priorities,
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etc.
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* guix-package
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** add ‘--list-generations’, and ‘--delete-generations’
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** add ‘--upgrade’
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** add ‘--search’
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* guix build utils
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** Add equivalent to "rm -rf"
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** Add equivalent to Nixpkgs's ‘wrapProgram’
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** Change ‘patch-shebang’ to DTRT for /usr/bin/env
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I.e., replace “#!/usr/bin/env perl” by “#!/nix/store/…/bin/perl”.
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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, possibly using [[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]].
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* distro
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** choose a name! (Jinn?)
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** port to new GNU/Linux platforms, notably ‘mipsel64-linux’
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** port to GNU/Hurd, aka. ‘i686-gnu’
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Problems include that current glibc releases do not build on GNU/Hurd.
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In addition, there haven’t been stable releases of GNU Mach, MiG, and
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Hurd, which would be a pre-condition.
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** make a bootable GNU/Linux-Libre distro, with OS configuration EDSL
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Similar in spirit to /etc/nixos/configuration.nix.
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