7833db1f30
Reported by Alex Kost <alezost@gmail.com> at <http://lists.gnu.org/archive/html/guix-devel/2015-06/msg00235.html>. * guix/gexp.scm (local-file): Add call to 'canonicalize-path'. * tests/gexp.scm ("one local file, symlink"): New test.
957 lines
37 KiB
Scheme
957 lines
37 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix gexp)
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#:use-module (guix store)
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#:use-module (guix monads)
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#:use-module (guix derivations)
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#:use-module (guix utils)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-9 gnu)
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#:use-module (srfi srfi-26)
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#:use-module (ice-9 match)
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#:export (gexp
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gexp?
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gexp-input
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gexp-input?
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local-file
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local-file?
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local-file-file
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local-file-name
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local-file-recursive?
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plain-file
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plain-file?
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plain-file-name
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plain-file-content
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gexp->derivation
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gexp->file
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gexp->script
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text-file*
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imported-files
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imported-modules
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compiled-modules
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define-gexp-compiler
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gexp-compiler?))
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;;; Commentary:
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;;;
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;;; This module implements "G-expressions", or "gexps". Gexps are like
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;;; S-expressions (sexps), with two differences:
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;;;
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;;; 1. References (un-quotations) to derivations or packages in a gexp are
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;;; replaced by the corresponding output file name; in addition, the
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;;; 'ungexp-native' unquote-like form allows code to explicitly refer to
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;;; the native code of a given package, in case of cross-compilation;
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;;;
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;;; 2. Gexps embed information about the derivations they refer to.
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;;;
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;;; Gexps make it easy to write to files Scheme code that refers to store
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;;; items, or to write Scheme code to build derivations.
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;;;
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;;; Code:
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;; "G expressions".
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(define-record-type <gexp>
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(make-gexp references natives proc)
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gexp?
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(references gexp-references) ; ((DRV-OR-PKG OUTPUT) ...)
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(natives gexp-native-references) ; ((DRV-OR-PKG OUTPUT) ...)
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(proc gexp-proc)) ; procedure
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(define (write-gexp gexp port)
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"Write GEXP on PORT."
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(display "#<gexp " port)
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;; Try to write the underlying sexp. Now, this trick doesn't work when
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;; doing things like (ungexp-splicing (gexp ())) because GEXP's procedure
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;; tries to use 'append' on that, which fails with wrong-type-arg.
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(false-if-exception
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(write (apply (gexp-proc gexp)
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(append (gexp-references gexp)
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(gexp-native-references gexp)))
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port))
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(format port " ~a>"
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(number->string (object-address gexp) 16)))
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(set-record-type-printer! <gexp> write-gexp)
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;;;
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;;; Methods.
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;;;
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;; Compiler for a type of objects that may be introduced in a gexp.
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(define-record-type <gexp-compiler>
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(gexp-compiler predicate lower)
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gexp-compiler?
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(predicate gexp-compiler-predicate)
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(lower gexp-compiler-lower))
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(define %gexp-compilers
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;; List of <gexp-compiler>.
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'())
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(define (register-compiler! compiler)
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"Register COMPILER as a gexp compiler."
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(set! %gexp-compilers (cons compiler %gexp-compilers)))
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(define (lookup-compiler object)
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"Search a compiler for OBJECT. Upon success, return the three argument
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procedure to lower it; otherwise return #f."
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(any (match-lambda
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(($ <gexp-compiler> predicate lower)
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(and (predicate object) lower)))
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%gexp-compilers))
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(define-syntax-rule (define-gexp-compiler (name (param predicate)
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system target)
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body ...)
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"Define NAME as a compiler for objects matching PREDICATE encountered in
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gexps. BODY must return a derivation for PARAM, an object that matches
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PREDICATE, for SYSTEM and TARGET (the latter of which is #f except when
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cross-compiling.)"
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(begin
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(define name
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(gexp-compiler predicate
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(lambda (param system target)
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body ...)))
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(register-compiler! name)))
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(define-gexp-compiler (derivation-compiler (drv derivation?) system target)
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;; Derivations are the lowest-level representation, so this is the identity
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;; compiler.
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(with-monad %store-monad
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(return drv)))
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;;;
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;;; File declarations.
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;;;
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(define-record-type <local-file>
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(%local-file file name recursive?)
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local-file?
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(file local-file-file) ;string
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(name local-file-name) ;string
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(recursive? local-file-recursive?)) ;Boolean
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(define* (local-file file #:optional (name (basename file))
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#:key recursive?)
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"Return an object representing local file FILE to add to the store; this
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object can be used in a gexp. FILE will be added to the store under NAME--by
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default the base name of FILE.
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When RECURSIVE? is true, the contents of FILE are added recursively; if FILE
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designates a flat file and RECURSIVE? is true, its contents are added, and its
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permission bits are kept.
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This is the declarative counterpart of the 'interned-file' monadic procedure."
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;; Canonicalize FILE so that if it's a symlink, it is resolved. Failing to
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;; do that, when RECURSIVE? is #t, we could end up creating a dangling
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;; symlink in the store, and when RECURSIVE? is #f 'add-to-store' would just
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;; throw an error, both of which are inconvenient.
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(%local-file (canonicalize-path file) name recursive?))
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(define-gexp-compiler (local-file-compiler (file local-file?) system target)
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;; "Compile" FILE by adding it to the store.
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(match file
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(($ <local-file> file name recursive?)
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(interned-file file name #:recursive? recursive?))))
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(define-record-type <plain-file>
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(%plain-file name content references)
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plain-file?
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(name plain-file-name) ;string
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(content plain-file-content) ;string
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(references plain-file-references)) ;list (currently unused)
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(define (plain-file name content)
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"Return an object representing a text file called NAME with the given
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CONTENT (a string) to be added to the store.
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This is the declarative counterpart of 'text-file'."
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;; XXX: For now just ignore 'references' because it's not clear how to use
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;; them in a declarative context.
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(%plain-file name content '()))
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(define-gexp-compiler (plain-file-compiler (file plain-file?) system target)
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;; "Compile" FILE by adding it to the store.
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(match file
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(($ <plain-file> name content references)
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(text-file name content references))))
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;;;
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;;; Inputs & outputs.
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;;;
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;; The input of a gexp.
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(define-record-type <gexp-input>
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(%gexp-input thing output native?)
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gexp-input?
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(thing gexp-input-thing) ;<package> | <origin> | <derivation> | ...
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(output gexp-input-output) ;string
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(native? gexp-input-native?)) ;Boolean
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(define (write-gexp-input input port)
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(match input
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(($ <gexp-input> thing output #f)
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(format port "#<gexp-input ~s:~a>" thing output))
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(($ <gexp-input> thing output #t)
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(format port "#<gexp-input native ~s:~a>" thing output))))
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(set-record-type-printer! <gexp-input> write-gexp-input)
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(define* (gexp-input thing ;convenience procedure
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#:optional (output "out")
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#:key native?)
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"Return a new <gexp-input> for the OUTPUT of THING; NATIVE? determines
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whether this should be considered a \"native\" input or not."
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(%gexp-input thing output native?))
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;; Reference to one of the derivation's outputs, for gexps used in
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;; derivations.
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(define-record-type <gexp-output>
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(gexp-output name)
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gexp-output?
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(name gexp-output-name))
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(define (write-gexp-output output port)
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(match output
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(($ <gexp-output> name)
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(format port "#<gexp-output ~a>" name))))
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(set-record-type-printer! <gexp-output> write-gexp-output)
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(define raw-derivation
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(store-lift derivation))
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(define* (lower-inputs inputs
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#:key system target)
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"Turn any package from INPUTS into a derivation for SYSTEM; return the
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corresponding input list as a monadic value. When TARGET is true, use it as
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the cross-compilation target triplet."
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(with-monad %store-monad
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(sequence %store-monad
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(map (match-lambda
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(((? struct? thing) sub-drv ...)
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(mlet* %store-monad ((lower -> (lookup-compiler thing))
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(drv (lower thing system target)))
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(return `(,drv ,@sub-drv))))
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(input
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(return input)))
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inputs))))
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(define* (lower-reference-graphs graphs #:key system target)
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"Given GRAPHS, a list of (FILE-NAME INPUT ...) lists for use as a
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#:reference-graphs argument, lower it such that each INPUT is replaced by the
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corresponding derivation."
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(match graphs
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(((file-names . inputs) ...)
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(mlet %store-monad ((inputs (lower-inputs inputs
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#:system system
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#:target target)))
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(return (map cons file-names inputs))))))
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(define* (lower-references lst #:key system target)
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"Based on LST, a list of output names and packages, return a list of output
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names and file names suitable for the #:allowed-references argument to
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'derivation'."
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;; XXX: Currently outputs other than "out" are not supported, and things
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;; other than packages aren't either.
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(with-monad %store-monad
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(define lower
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(match-lambda
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((? string? output)
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(return output))
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(($ <gexp-input> thing output native?)
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(mlet* %store-monad ((lower -> (lookup-compiler thing))
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(drv (lower thing system
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(if native? #f target))))
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(return (derivation->output-path drv output))))
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(thing
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(mlet* %store-monad ((lower -> (lookup-compiler thing))
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(drv (lower thing system target)))
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(return (derivation->output-path drv))))))
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(sequence %store-monad (map lower lst))))
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(define default-guile-derivation
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;; Here we break the abstraction by talking to the higher-level layer.
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;; Thus, do the resolution lazily to hide the circular dependency.
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(let ((proc (delay
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(let ((iface (resolve-interface '(guix packages))))
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(module-ref iface 'default-guile-derivation)))))
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(lambda (system)
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((force proc) system))))
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(define* (gexp->derivation name exp
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#:key
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system (target 'current)
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hash hash-algo recursive?
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(env-vars '())
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(modules '())
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(module-path %load-path)
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(guile-for-build (%guile-for-build))
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(graft? (%graft?))
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references-graphs
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allowed-references
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leaked-env-vars
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local-build?)
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"Return a derivation NAME that runs EXP (a gexp) with GUILE-FOR-BUILD (a
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derivation) on SYSTEM. When TARGET is true, it is used as the
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cross-compilation target triplet for packages referred to by EXP.
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Make MODULES available in the evaluation context of EXP; MODULES is a list of
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names of Guile modules searched in MODULE-PATH to be copied in the store,
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compiled, and made available in the load path during the execution of
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EXP---e.g., '((guix build utils) (guix build gnu-build-system)).
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GRAFT? determines whether packages referred to by EXP should be grafted when
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applicable.
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When REFERENCES-GRAPHS is true, it must be a list of tuples of one of the
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following forms:
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(FILE-NAME PACKAGE)
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(FILE-NAME PACKAGE OUTPUT)
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(FILE-NAME DERIVATION)
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(FILE-NAME DERIVATION OUTPUT)
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(FILE-NAME STORE-ITEM)
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The right-hand-side of each element of REFERENCES-GRAPHS is automatically made
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an input of the build process of EXP. In the build environment, each
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FILE-NAME contains the reference graph of the corresponding item, in a simple
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text format.
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ALLOWED-REFERENCES must be either #f or a list of output names and packages.
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In the latter case, the list denotes store items that the result is allowed to
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refer to. Any reference to another store item will lead to a build error.
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The other arguments are as for 'derivation'."
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(define %modules modules)
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(define outputs (gexp-outputs exp))
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(define (graphs-file-names graphs)
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;; Return a list of (FILE-NAME . STORE-PATH) pairs made from GRAPHS.
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(map (match-lambda
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;; TODO: Remove 'derivation?' special cases.
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((file-name (? derivation? drv))
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(cons file-name (derivation->output-path drv)))
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((file-name (? derivation? drv) sub-drv)
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(cons file-name (derivation->output-path drv sub-drv)))
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((file-name thing)
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(cons file-name thing)))
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graphs))
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(mlet* %store-monad (;; The following binding forces '%current-system' and
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;; '%current-target-system' to be looked up at >>=
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;; time.
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(graft? (set-grafting graft?))
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(system -> (or system (%current-system)))
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(target -> (if (eq? target 'current)
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(%current-target-system)
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target))
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(normals (lower-inputs (gexp-inputs exp)
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#:system system
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#:target target))
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(natives (lower-inputs (gexp-native-inputs exp)
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#:system system
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#:target #f))
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(inputs -> (append normals natives))
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(sexp (gexp->sexp exp
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#:system system
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#:target target))
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(builder (text-file (string-append name "-builder")
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(object->string sexp)))
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(modules (if (pair? %modules)
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(imported-modules %modules
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#:system system
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#:module-path module-path
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#:guile guile-for-build)
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(return #f)))
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(compiled (if (pair? %modules)
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(compiled-modules %modules
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#:system system
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#:module-path module-path
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#:guile guile-for-build)
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(return #f)))
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(graphs (if references-graphs
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(lower-reference-graphs references-graphs
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#:system system
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#:target target)
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(return #f)))
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(allowed (if allowed-references
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(lower-references allowed-references
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#:system system
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#:target target)
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(return #f)))
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(guile (if guile-for-build
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(return guile-for-build)
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(default-guile-derivation system))))
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(mbegin %store-monad
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(set-grafting graft?) ;restore the initial setting
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(raw-derivation name
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(string-append (derivation->output-path guile)
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"/bin/guile")
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`("--no-auto-compile"
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,@(if (pair? %modules)
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`("-L" ,(derivation->output-path modules)
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"-C" ,(derivation->output-path compiled))
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'())
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,builder)
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#:outputs outputs
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#:env-vars env-vars
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#:system system
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#:inputs `((,guile)
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(,builder)
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,@(if modules
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`((,modules) (,compiled) ,@inputs)
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inputs)
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,@(match graphs
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(((_ . inputs) ...) inputs)
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(_ '())))
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#:hash hash #:hash-algo hash-algo #:recursive? recursive?
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#:references-graphs (and=> graphs graphs-file-names)
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#:allowed-references allowed
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#:leaked-env-vars leaked-env-vars
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#:local-build? local-build?))))
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(define* (gexp-inputs exp #:key native?)
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"Return the input list for EXP. When NATIVE? is true, return only native
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references; otherwise, return only non-native references."
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(define (add-reference-inputs ref result)
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(match ref
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(($ <gexp-input> (? gexp? exp) _ #t)
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(if native?
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(append (gexp-inputs exp)
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(gexp-inputs exp #:native? #t)
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result)
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result))
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(($ <gexp-input> (? gexp? exp) _ #f)
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(if native?
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(append (gexp-inputs exp #:native? #t)
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result)
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(append (gexp-inputs exp)
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result)))
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(($ <gexp-input> (? string? str))
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(if (direct-store-path? str)
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(cons `(,str) result)
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result))
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(($ <gexp-input> (? struct? thing) output)
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(if (lookup-compiler thing)
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;; THING is a derivation, or a package, or an origin, etc.
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(cons `(,thing ,output) result)
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result))
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(($ <gexp-input> (lst ...) output n?)
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(fold-right add-reference-inputs result
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;; XXX: For now, automatically convert LST to a list of
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;; gexp-inputs.
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(map (match-lambda
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((? gexp-input? x) x)
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(x (%gexp-input x "out" (or n? native?))))
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lst)))
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(_
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;; Ignore references to other kinds of objects.
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result)))
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(fold-right add-reference-inputs
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'()
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(if native?
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(gexp-native-references exp)
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(gexp-references exp))))
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(define gexp-native-inputs
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(cut gexp-inputs <> #:native? #t))
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(define (gexp-outputs exp)
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"Return the outputs referred to by EXP as a list of strings."
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(define (add-reference-output ref result)
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(match ref
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(($ <gexp-output> name)
|
||
(cons name result))
|
||
(($ <gexp-input> (? gexp? exp))
|
||
(append (gexp-outputs exp) result))
|
||
(($ <gexp-input> (lst ...) output native?)
|
||
;; XXX: Automatically convert LST.
|
||
(add-reference-output (map (match-lambda
|
||
((? gexp-input? x) x)
|
||
(x (%gexp-input x "out" native?)))
|
||
lst)
|
||
result))
|
||
((lst ...)
|
||
(fold-right add-reference-output result lst))
|
||
(_
|
||
result)))
|
||
|
||
(delete-duplicates
|
||
(add-reference-output (gexp-references exp) '())))
|
||
|
||
(define* (gexp->sexp exp #:key
|
||
(system (%current-system))
|
||
(target (%current-target-system)))
|
||
"Return (monadically) the sexp corresponding to EXP for the given OUTPUT,
|
||
and in the current monad setting (system type, etc.)"
|
||
(define* (reference->sexp ref #:optional native?)
|
||
(with-monad %store-monad
|
||
(match ref
|
||
(($ <gexp-output> output)
|
||
;; Output file names are not known in advance but the daemon defines
|
||
;; an environment variable for each of them at build time, so use
|
||
;; that trick.
|
||
(return `((@ (guile) getenv) ,output)))
|
||
(($ <gexp-input> (? gexp? exp) output n?)
|
||
(gexp->sexp exp
|
||
#:system system
|
||
#:target (if (or n? native?) #f target)))
|
||
(($ <gexp-input> (refs ...) output n?)
|
||
(sequence %store-monad
|
||
(map (lambda (ref)
|
||
;; XXX: Automatically convert REF to an gexp-input.
|
||
(reference->sexp
|
||
(if (gexp-input? ref)
|
||
ref
|
||
(%gexp-input ref "out" n?))
|
||
native?))
|
||
refs)))
|
||
(($ <gexp-input> (? struct? thing) output n?)
|
||
(let ((lower (lookup-compiler thing))
|
||
(target (if (or n? native?) #f target)))
|
||
(mlet %store-monad ((obj (lower thing system target)))
|
||
;; OBJ must be either a derivation or a store file name.
|
||
(return (match obj
|
||
((? derivation? drv)
|
||
(derivation->output-path drv output))
|
||
((? string? file)
|
||
file))))))
|
||
(($ <gexp-input> x)
|
||
(return x))
|
||
(x
|
||
(return x)))))
|
||
|
||
(mlet %store-monad
|
||
((args (sequence %store-monad
|
||
(append (map reference->sexp (gexp-references exp))
|
||
(map (cut reference->sexp <> #t)
|
||
(gexp-native-references exp))))))
|
||
(return (apply (gexp-proc exp) args))))
|
||
|
||
(define (syntax-location-string s)
|
||
"Return a string representing the source code location of S."
|
||
(let ((props (syntax-source s)))
|
||
(if props
|
||
(let ((file (assoc-ref props 'filename))
|
||
(line (and=> (assoc-ref props 'line) 1+))
|
||
(column (assoc-ref props 'column)))
|
||
(if file
|
||
(simple-format #f "~a:~a:~a"
|
||
file line column)
|
||
(simple-format #f "~a:~a" line column)))
|
||
"<unknown location>")))
|
||
|
||
(define-syntax gexp
|
||
(lambda (s)
|
||
(define (collect-escapes exp)
|
||
;; Return all the 'ungexp' present in EXP.
|
||
(let loop ((exp exp)
|
||
(result '()))
|
||
(syntax-case exp (ungexp
|
||
ungexp-splicing
|
||
ungexp-native
|
||
ungexp-native-splicing)
|
||
((ungexp _)
|
||
(cons exp result))
|
||
((ungexp _ _)
|
||
(cons exp result))
|
||
((ungexp-splicing _ ...)
|
||
(cons exp result))
|
||
((ungexp-native _ ...)
|
||
result)
|
||
((ungexp-native-splicing _ ...)
|
||
result)
|
||
((exp0 exp ...)
|
||
(let ((result (loop #'exp0 result)))
|
||
(fold loop result #'(exp ...))))
|
||
(_
|
||
result))))
|
||
|
||
(define (collect-native-escapes exp)
|
||
;; Return all the 'ungexp-native' forms present in EXP.
|
||
(let loop ((exp exp)
|
||
(result '()))
|
||
(syntax-case exp (ungexp
|
||
ungexp-splicing
|
||
ungexp-native
|
||
ungexp-native-splicing)
|
||
((ungexp-native _)
|
||
(cons exp result))
|
||
((ungexp-native _ _)
|
||
(cons exp result))
|
||
((ungexp-native-splicing _ ...)
|
||
(cons exp result))
|
||
((ungexp _ ...)
|
||
result)
|
||
((ungexp-splicing _ ...)
|
||
result)
|
||
((exp0 exp ...)
|
||
(let ((result (loop #'exp0 result)))
|
||
(fold loop result #'(exp ...))))
|
||
(_
|
||
result))))
|
||
|
||
(define (escape->ref exp)
|
||
;; Turn 'ungexp' form EXP into a "reference".
|
||
(syntax-case exp (ungexp ungexp-splicing
|
||
ungexp-native ungexp-native-splicing
|
||
output)
|
||
((ungexp output)
|
||
#'(gexp-output "out"))
|
||
((ungexp output name)
|
||
#'(gexp-output name))
|
||
((ungexp thing)
|
||
#'(%gexp-input thing "out" #f))
|
||
((ungexp drv-or-pkg out)
|
||
#'(%gexp-input drv-or-pkg out #f))
|
||
((ungexp-splicing lst)
|
||
#'(%gexp-input lst "out" #f))
|
||
((ungexp-native thing)
|
||
#'(%gexp-input thing "out" #t))
|
||
((ungexp-native drv-or-pkg out)
|
||
#'(%gexp-input drv-or-pkg out #t))
|
||
((ungexp-native-splicing lst)
|
||
#'(%gexp-input lst "out" #t))))
|
||
|
||
(define (substitute-ungexp exp substs)
|
||
;; Given EXP, an 'ungexp' or 'ungexp-native' form, substitute it with
|
||
;; the corresponding form in SUBSTS.
|
||
(match (assoc exp substs)
|
||
((_ id)
|
||
id)
|
||
(_
|
||
#'(syntax-error "error: no 'ungexp' substitution"
|
||
#'ref))))
|
||
|
||
(define (substitute-ungexp-splicing exp substs)
|
||
(syntax-case exp ()
|
||
((exp rest ...)
|
||
(match (assoc #'exp substs)
|
||
((_ id)
|
||
(with-syntax ((id id))
|
||
#`(append id
|
||
#,(substitute-references #'(rest ...) substs))))
|
||
(_
|
||
#'(syntax-error "error: no 'ungexp-splicing' substitution"
|
||
#'ref))))))
|
||
|
||
(define (substitute-references exp substs)
|
||
;; Return a variant of EXP where all the cars of SUBSTS have been
|
||
;; replaced by the corresponding cdr.
|
||
(syntax-case exp (ungexp ungexp-native
|
||
ungexp-splicing ungexp-native-splicing)
|
||
((ungexp _ ...)
|
||
(substitute-ungexp exp substs))
|
||
((ungexp-native _ ...)
|
||
(substitute-ungexp exp substs))
|
||
(((ungexp-splicing _ ...) rest ...)
|
||
(substitute-ungexp-splicing exp substs))
|
||
(((ungexp-native-splicing _ ...) rest ...)
|
||
(substitute-ungexp-splicing exp substs))
|
||
((exp0 exp ...)
|
||
#`(cons #,(substitute-references #'exp0 substs)
|
||
#,(substitute-references #'(exp ...) substs)))
|
||
(x #''x)))
|
||
|
||
(syntax-case s (ungexp output)
|
||
((_ exp)
|
||
(let* ((normals (delete-duplicates (collect-escapes #'exp)))
|
||
(natives (delete-duplicates (collect-native-escapes #'exp)))
|
||
(escapes (append normals natives))
|
||
(formals (generate-temporaries escapes))
|
||
(sexp (substitute-references #'exp (zip escapes formals)))
|
||
(refs (map escape->ref normals))
|
||
(nrefs (map escape->ref natives)))
|
||
#`(make-gexp (list #,@refs) (list #,@nrefs)
|
||
(lambda #,formals
|
||
#,sexp)))))))
|
||
|
||
|
||
;;;
|
||
;;; Module handling.
|
||
;;;
|
||
|
||
(define %mkdir-p-definition
|
||
;; The code for 'mkdir-p' is copied from (guix build utils). We use it in
|
||
;; derivations that cannot use the #:modules argument of 'gexp->derivation'
|
||
;; precisely because they implement that functionality.
|
||
(gexp
|
||
(define (mkdir-p dir)
|
||
(define absolute?
|
||
(string-prefix? "/" dir))
|
||
|
||
(define not-slash
|
||
(char-set-complement (char-set #\/)))
|
||
|
||
(let loop ((components (string-tokenize dir not-slash))
|
||
(root (if absolute? "" ".")))
|
||
(match components
|
||
((head tail ...)
|
||
(let ((path (string-append root "/" head)))
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(mkdir path)
|
||
(loop tail path))
|
||
(lambda args
|
||
(if (= EEXIST (system-error-errno args))
|
||
(loop tail path)
|
||
(apply throw args))))))
|
||
(() #t))))))
|
||
|
||
(define* (imported-files files
|
||
#:key (name "file-import")
|
||
(system (%current-system))
|
||
(guile (%guile-for-build)))
|
||
"Return a derivation that imports FILES into STORE. FILES must be a list
|
||
of (FINAL-PATH . FILE-NAME) pairs; each FILE-NAME is read from the file
|
||
system, imported, and appears under FINAL-PATH in the resulting store path."
|
||
(define file-pair
|
||
(match-lambda
|
||
((final-path . file-name)
|
||
(mlet %store-monad ((file (interned-file file-name
|
||
(basename final-path))))
|
||
(return (list final-path file))))))
|
||
|
||
(mlet %store-monad ((files (sequence %store-monad
|
||
(map file-pair files))))
|
||
(define build
|
||
(gexp
|
||
(begin
|
||
(use-modules (ice-9 match))
|
||
|
||
(ungexp %mkdir-p-definition)
|
||
|
||
(mkdir (ungexp output)) (chdir (ungexp output))
|
||
(for-each (match-lambda
|
||
((final-path store-path)
|
||
(mkdir-p (dirname final-path))
|
||
(symlink store-path final-path)))
|
||
'(ungexp files)))))
|
||
|
||
;; TODO: Pass FILES as an environment variable so that BUILD remains
|
||
;; exactly the same regardless of FILES: less disk space, and fewer
|
||
;; 'add-to-store' RPCs.
|
||
(gexp->derivation name build
|
||
#:system system
|
||
#:guile-for-build guile
|
||
#:local-build? #t)))
|
||
|
||
(define search-path*
|
||
;; A memoizing version of 'search-path' so 'imported-modules' does not end
|
||
;; up looking for the same files over and over again.
|
||
(memoize search-path))
|
||
|
||
(define* (imported-modules modules
|
||
#:key (name "module-import")
|
||
(system (%current-system))
|
||
(guile (%guile-for-build))
|
||
(module-path %load-path))
|
||
"Return a derivation that contains the source files of MODULES, a list of
|
||
module names such as `(ice-9 q)'. All of MODULES must be in the MODULE-PATH
|
||
search path."
|
||
;; TODO: Determine the closure of MODULES, build the `.go' files,
|
||
;; canonicalize the source files through read/write, etc.
|
||
(let ((files (map (lambda (m)
|
||
(let ((f (string-append
|
||
(string-join (map symbol->string m) "/")
|
||
".scm")))
|
||
(cons f (search-path* module-path f))))
|
||
modules)))
|
||
(imported-files files #:name name #:system system
|
||
#:guile guile)))
|
||
|
||
(define* (compiled-modules modules
|
||
#:key (name "module-import-compiled")
|
||
(system (%current-system))
|
||
(guile (%guile-for-build))
|
||
(module-path %load-path))
|
||
"Return a derivation that builds a tree containing the `.go' files
|
||
corresponding to MODULES. All the MODULES are built in a context where
|
||
they can refer to each other."
|
||
(mlet %store-monad ((modules (imported-modules modules
|
||
#:system system
|
||
#:guile guile
|
||
#:module-path
|
||
module-path)))
|
||
(define build
|
||
(gexp
|
||
(begin
|
||
(use-modules (ice-9 ftw)
|
||
(ice-9 match)
|
||
(srfi srfi-26)
|
||
(system base compile))
|
||
|
||
(ungexp %mkdir-p-definition)
|
||
|
||
(define (regular? file)
|
||
(not (member file '("." ".."))))
|
||
|
||
(define (process-directory directory output)
|
||
(let ((entries (map (cut string-append directory "/" <>)
|
||
(scandir directory regular?))))
|
||
(for-each (lambda (entry)
|
||
(if (file-is-directory? entry)
|
||
(let ((output (string-append output "/"
|
||
(basename entry))))
|
||
(mkdir-p output)
|
||
(process-directory entry output))
|
||
(let* ((base (string-drop-right
|
||
(basename entry)
|
||
4)) ;.scm
|
||
(output (string-append output "/" base
|
||
".go")))
|
||
(compile-file entry
|
||
#:output-file output
|
||
#:opts
|
||
%auto-compilation-options))))
|
||
entries)))
|
||
|
||
(set! %load-path (cons (ungexp modules) %load-path))
|
||
(mkdir (ungexp output))
|
||
(chdir (ungexp modules))
|
||
(process-directory "." (ungexp output)))))
|
||
|
||
;; TODO: Pass MODULES as an environment variable.
|
||
(gexp->derivation name build
|
||
#:system system
|
||
#:guile-for-build guile
|
||
#:local-build? #t)))
|
||
|
||
|
||
;;;
|
||
;;; Convenience procedures.
|
||
;;;
|
||
|
||
(define (default-guile)
|
||
;; Lazily resolve 'guile-final'. This module must not refer to (gnu …)
|
||
;; modules directly, to avoid circular dependencies, hence this hack.
|
||
(module-ref (resolve-interface '(gnu packages commencement))
|
||
'guile-final))
|
||
|
||
(define* (gexp->script name exp
|
||
#:key (modules '()) (guile (default-guile)))
|
||
"Return an executable script NAME that runs EXP using GUILE with MODULES in
|
||
its search path."
|
||
(mlet %store-monad ((modules (imported-modules modules))
|
||
(compiled (compiled-modules modules)))
|
||
(gexp->derivation name
|
||
(gexp
|
||
(call-with-output-file (ungexp output)
|
||
(lambda (port)
|
||
;; Note: that makes a long shebang. When the store
|
||
;; is /gnu/store, that fits within the 128-byte
|
||
;; limit imposed by Linux, but that may go beyond
|
||
;; when running tests.
|
||
(format port
|
||
"#!~a/bin/guile --no-auto-compile~%!#~%"
|
||
(ungexp guile))
|
||
|
||
;; Write the 'eval-when' form so that it can be
|
||
;; compiled.
|
||
(write
|
||
'(eval-when (expand load eval)
|
||
(set! %load-path
|
||
(cons (ungexp modules) %load-path))
|
||
(set! %load-compiled-path
|
||
(cons (ungexp compiled)
|
||
%load-compiled-path)))
|
||
port)
|
||
(write '(ungexp exp) port)
|
||
(chmod port #o555)))))))
|
||
|
||
(define (gexp->file name exp)
|
||
"Return a derivation that builds a file NAME containing EXP."
|
||
(gexp->derivation name
|
||
(gexp
|
||
(call-with-output-file (ungexp output)
|
||
(lambda (port)
|
||
(write '(ungexp exp) port))))
|
||
#:local-build? #t))
|
||
|
||
(define* (text-file* name #:rest text)
|
||
"Return as a monadic value a derivation that builds a text file containing
|
||
all of TEXT. TEXT may list, in addition to strings, objects of any type that
|
||
can be used in a gexp: packages, derivations, local file objects, etc. The
|
||
resulting store file holds references to all these."
|
||
(define builder
|
||
(gexp (call-with-output-file (ungexp output "out")
|
||
(lambda (port)
|
||
(display (string-append (ungexp-splicing text)) port)))))
|
||
|
||
(gexp->derivation name builder))
|
||
|
||
|
||
;;;
|
||
;;; Syntactic sugar.
|
||
;;;
|
||
|
||
(eval-when (expand load eval)
|
||
(define* (read-ungexp chr port #:optional native?)
|
||
"Read an 'ungexp' or 'ungexp-splicing' form from PORT. When NATIVE? is
|
||
true, use 'ungexp-native' and 'ungexp-native-splicing' instead."
|
||
(define unquote-symbol
|
||
(match (peek-char port)
|
||
(#\@
|
||
(read-char port)
|
||
(if native?
|
||
'ungexp-native-splicing
|
||
'ungexp-splicing))
|
||
(_
|
||
(if native?
|
||
'ungexp-native
|
||
'ungexp))))
|
||
|
||
(match (read port)
|
||
((? symbol? symbol)
|
||
(let ((str (symbol->string symbol)))
|
||
(match (string-index-right str #\:)
|
||
(#f
|
||
`(,unquote-symbol ,symbol))
|
||
(colon
|
||
(let ((name (string->symbol (substring str 0 colon)))
|
||
(output (substring str (+ colon 1))))
|
||
`(,unquote-symbol ,name ,output))))))
|
||
(x
|
||
`(,unquote-symbol ,x))))
|
||
|
||
(define (read-gexp chr port)
|
||
"Read a 'gexp' form from PORT."
|
||
`(gexp ,(read port)))
|
||
|
||
;; Extend the reader
|
||
(read-hash-extend #\~ read-gexp)
|
||
(read-hash-extend #\$ read-ungexp)
|
||
(read-hash-extend #\+ (cut read-ungexp <> <> #t)))
|
||
|
||
;;; gexp.scm ends here
|