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# buildLisp provides Nix functions to build Common Lisp packages,
# targeting SBCL.
#
# buildLisp is designed to enforce conventions and do away with the
# free-for-all of existing Lisp build systems.
{ pkgs ? { third_party = import <nixpkgs> {}; }
, ... }:
let
inherit (builtins) map elemAt match;
inherit (pkgs.third_party) lib runCommand writeText sbcl;
#
# Internal helper definitions
#
# 'genCompileLisp' generates a Lisp file that instructs SBCL to
# compile the provided list of Lisp source files to $out.
genCompileLisp = srcs: writeText "compile.lisp" ''
;; This file compiles the specified sources into the Nix build
;; directory, creating one FASL file for each source.
(require 'sb-posix)
(defun nix-compile-lisp (srcfile)
(let ((outfile (make-pathname :type "fasl"
:directory (or (sb-posix:getenv "NIX_BUILD_TOP")
(error "not running in a Nix build"))
:defaults srcfile)))
(multiple-value-bind (_outfile _warnings-p failure-p)
(compile-file srcfile :output-file outfile)
(when failure-p
(sb-posix:exit 1)))))
(let ((*compile-verbose* t)
;; FASL files are compiled into the working directory of the
;; build and *then* moved to the correct out location.
(pwd (sb-posix:getcwd)))
;; These forms were inserted by the Nix build:
${
lib.concatStringsSep "\n" (map (src: "(nix-compile-lisp \"${src}\")") srcs)
}
)
'';
#
# Public API functions
#
# Add an `overrideLisp` attribute to a function result that works
# similar to `overrideAttrs`, but is used specifically for the
# arguments passed to Lisp builders.
makeOverridable = f: orig: (f orig) // {
overrideLisp = new: makeOverridable f (orig // (new orig));
};
# 'library' builds a list of Common Lisp files into a single FASL
# which can then be loaded into SBCL.
library = { name, srcs, deps ? [] }: runCommand "${name}-cllib" {} ''
${sbcl}/bin/sbcl --script ${genCompileLisp srcs}
# FASL files can be combined by simply concatenating them together:
mkdir $out
cat ./*.fasl > $out/${name}.fasl
'';
# 'program' creates an executable containing a dumped image of the
# specified sources and dependencies.
program = {};
# 'sbclWith' creates an image with the specified libraries /
# programs loaded.
sbclWith = {};
in {
library = makeOverridable library;
program = makeOverridable program;
sbclWith = makeOverridable sbclWith;
}
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