mirror of
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d9e0ae07db
It will be used in the 'optional-tests' linter.
* guix/gexp.scm (gexp->approximate-sexp): New procedure.
* tests/gexp.scm
("no references", "unquoted gexp", "unquoted gexp (native)")
("spliced gexp", "unspliced gexp, approximated")
("unquoted gexp, approximated"): Test it.
* doc/gexp.scm ("G-Expressions"): Document it.
Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
2075 lines
85 KiB
Scheme
2075 lines
85 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2018 Clément Lassieur <clement@lassieur.org>
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;;; Copyright © 2018 Jan Nieuwenhuizen <janneke@gnu.org>
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;;; Copyright © 2019, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
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;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
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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 grafts)
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#:use-module (guix utils)
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#:use-module (guix diagnostics)
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#:use-module (guix i18n)
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#:use-module (rnrs bytevectors)
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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 (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module (ice-9 format)
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#:use-module (ice-9 match)
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#:export (gexp
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gexp?
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with-imported-modules
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with-extensions
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let-system
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gexp->approximate-sexp
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gexp-input
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gexp-input?
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gexp-input-thing
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gexp-input-output
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gexp-input-native?
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assume-valid-file-name
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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-absolute-file-name
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local-file-name
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local-file-recursive?
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local-file-select?
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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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computed-file
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computed-file?
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computed-file-name
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computed-file-gexp
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computed-file-options
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program-file
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program-file?
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program-file-name
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program-file-gexp
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program-file-guile
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program-file-module-path
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scheme-file
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scheme-file?
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scheme-file-name
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scheme-file-gexp
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file-append
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file-append?
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file-append-base
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file-append-suffix
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raw-derivation-file
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raw-derivation-file?
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with-parameters
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parameterized?
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load-path-expression
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gexp-modules
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lower-gexp
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lowered-gexp?
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lowered-gexp-sexp
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lowered-gexp-inputs
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lowered-gexp-sources
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lowered-gexp-guile
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lowered-gexp-load-path
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lowered-gexp-load-compiled-path
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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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mixed-text-file
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file-union
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directory-union
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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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file-like?
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lower-object
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&gexp-error
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gexp-error?
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&gexp-input-error
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gexp-input-error?
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gexp-error-invalid-input))
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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 modules extensions proc location)
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gexp?
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(references gexp-references) ;list of <gexp-input>
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(modules gexp-self-modules) ;list of module names
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(extensions gexp-self-extensions) ;list of lowerable things
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(proc gexp-proc) ;procedure
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(location %gexp-location)) ;location alist
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(define (gexp-location gexp)
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"Return the source code location of GEXP."
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(and=> (%gexp-location gexp) source-properties->location))
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(define* (gexp->approximate-sexp gexp)
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"Return the S-expression corresponding to GEXP, but do not lower anything.
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As a result, the S-expression will be approximate if GEXP has references."
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(define (gexp-like? thing)
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(or (gexp? thing) (gexp-input? thing)))
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(apply (gexp-proc gexp)
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(map (lambda (reference)
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(match reference
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(($ <gexp-input> thing output native)
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(if (gexp-like? thing)
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(gexp->approximate-sexp thing)
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;; Simply returning 'thing' won't work in some
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;; situations; see 'write-gexp' below.
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'(*approximate*)))
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(_ '(*approximate*))))
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(gexp-references gexp))))
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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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(gexp-references gexp))
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port))
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(let ((loc (gexp-location gexp)))
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(when loc
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(format port " ~a" (location->string loc))))
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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 type lower expand)
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gexp-compiler?
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(type gexp-compiler-type) ;record type descriptor
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(lower gexp-compiler-lower)
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(expand gexp-compiler-expand)) ;#f | DRV -> sexp
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(define-condition-type &gexp-error &error
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gexp-error?)
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(define-condition-type &gexp-input-error &gexp-error
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gexp-input-error?
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(input gexp-error-invalid-input))
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(define %gexp-compilers
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;; 'eq?' mapping of record type descriptor to <gexp-compiler>.
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(make-hash-table 20))
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(define (default-expander thing obj output)
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"This is the default expander for \"things\" that appear in gexps. It
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returns its output file name of OBJ's OUTPUT."
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(match obj
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((? derivation? drv)
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(derivation->output-path drv output))
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((? string? file)
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file)
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((? self-quoting? obj)
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obj)))
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(define (register-compiler! compiler)
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"Register COMPILER as a gexp compiler."
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(hashq-set! %gexp-compilers
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(gexp-compiler-type compiler) compiler))
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(define (lookup-compiler object)
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"Search for 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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(and=> (hashq-ref %gexp-compilers (struct-vtable object))
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gexp-compiler-lower))
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(define (file-like? object)
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"Return #t if OBJECT leads to a file in the store once unquoted in a
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G-expression; otherwise return #f."
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(and (struct? object) (->bool (lookup-compiler object))))
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(define (lookup-expander object)
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"Search for an expander for OBJECT. Upon success, return the three argument
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procedure to expand it; otherwise return #f."
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(and=> (hashq-ref %gexp-compilers (struct-vtable object))
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gexp-compiler-expand))
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(define* (lower-object obj
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#:optional (system (%current-system))
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#:key (target 'current))
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"Return as a value in %STORE-MONAD the derivation or store item
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corresponding to OBJ for SYSTEM, cross-compiling for TARGET if TARGET is true.
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OBJ must be an object that has an associated gexp compiler, such as a
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<package>."
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(mlet %store-monad ((target (if (eq? target 'current)
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(current-target-system)
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(return target)))
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(graft? (grafting?)))
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(let loop ((obj obj))
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(match (lookup-compiler obj)
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(#f
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(raise (condition (&gexp-input-error (input obj)))))
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(lower
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;; Cache in STORE the result of lowering OBJ.
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(mcached (mlet %store-monad ((lowered (lower obj system target)))
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(if (and (struct? lowered)
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(not (derivation? lowered)))
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(loop lowered)
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(return lowered)))
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obj
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system target graft?))))))
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(define* (lower+expand-object obj
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#:optional (system (%current-system))
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#:key target (output "out"))
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"Return as a value in %STORE-MONAD the output of object OBJ expands to for
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SYSTEM and TARGET. Object such as <package>, <file-append>, or <plain-file>
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expand to file names, but it's possible to expand to a plain data type."
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(let loop ((obj obj)
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(expand (and (struct? obj) (lookup-expander obj))))
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(match (lookup-compiler obj)
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(#f
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(raise (condition (&gexp-input-error (input obj)))))
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(lower
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(mlet* %store-monad ((graft? (grafting?))
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(lowered (mcached (lower obj system target)
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obj
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system target graft?)))
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;; LOWER might return something that needs to be further
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;; lowered.
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(if (struct? lowered)
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;; If we lack an expander, delegate to that of LOWERED.
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(if (not expand)
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(loop lowered (lookup-expander lowered))
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(return (expand obj lowered output)))
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(if (not expand) ;self-quoting
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(return lowered)
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(return (expand obj lowered output)))))))))
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(define-syntax define-gexp-compiler
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(syntax-rules (=> compiler expander)
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"Define NAME as a compiler for objects matching PREDICATE encountered in
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gexps.
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In the simplest form of the macro, BODY must return (1) a derivation for
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a record of the specified type, for SYSTEM and TARGET (the latter of which is
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#f except when cross-compiling), (2) another record that can itself be
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compiled down to a derivation, or (3) an object of a primitive data type.
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The more elaborate form allows you to specify an expander:
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(define-gexp-compiler something-compiler <something>
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compiler => (lambda (param system target) ...)
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expander => (lambda (param drv output) ...))
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The expander specifies how an object is converted to its sexp representation."
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((_ (name (param record-type) system target) body ...)
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(define-gexp-compiler name record-type
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compiler => (lambda (param system target) body ...)
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expander => default-expander))
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((_ name record-type
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compiler => compile
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expander => expand)
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(begin
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(define name
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(gexp-compiler record-type compile expand))
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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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;; Expand to a raw ".drv" file for the lowerable object it wraps. In other
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;; words, this gives the raw ".drv" file instead of its build result.
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(define-record-type <raw-derivation-file>
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(raw-derivation-file obj)
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raw-derivation-file?
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(obj raw-derivation-file-object)) ;lowerable object
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(define-gexp-compiler raw-derivation-file-compiler <raw-derivation-file>
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compiler => (lambda (obj system target)
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(mlet %store-monad ((obj (lower-object
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(raw-derivation-file-object obj)
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system #:target target)))
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;; Returning the .drv file name instead of the <derivation>
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;; record ensures that 'lower-gexp' will classify it as a
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;; "source" and not as an "input".
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(return (if (derivation? obj)
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(derivation-file-name obj)
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obj))))
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expander => (lambda (obj lowered output)
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(if (derivation? lowered)
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(derivation-file-name lowered)
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lowered)))
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;;;
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;;; System dependencies.
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;;;
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;; Binding form for the current system and cross-compilation target.
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(define-record-type <system-binding>
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(system-binding proc)
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system-binding?
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(proc system-binding-proc))
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(define-syntax let-system
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(syntax-rules ()
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"Introduce a system binding in a gexp. The simplest form is:
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(let-system system
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(cond ((string=? system \"x86_64-linux\") ...)
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(else ...)))
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which binds SYSTEM to the currently targeted system. The second form is
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similar, but it also shows the cross-compilation target:
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(let-system (system target)
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...)
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Here TARGET is bound to the cross-compilation triplet or #f."
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((_ (system target) exp0 exp ...)
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(system-binding (lambda (system target)
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exp0 exp ...)))
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((_ system exp0 exp ...)
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(system-binding (lambda (system target)
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exp0 exp ...)))))
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(define-gexp-compiler system-binding-compiler <system-binding>
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compiler => (lambda (binding system target)
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(match binding
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(($ <system-binding> proc)
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(with-monad %store-monad
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;; PROC is expected to return a lowerable object.
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;; 'lower-object' takes care of residualizing it to a
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;; derivation or similar.
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(return (proc system target))))))
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;; Delegate to the expander of the object returned by PROC.
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expander => #f)
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;;;
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;;; File declarations.
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;;;
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;; A local file name. FILE is the file name the user entered, which can be a
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;; relative file name, and ABSOLUTE is a promise that computes its canonical
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;; absolute file name. We keep it in a promise to compute it lazily and avoid
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;; repeated 'stat' calls.
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||
(define-record-type <local-file>
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(%%local-file file absolute name recursive? select?)
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local-file?
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(file local-file-file) ;string
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(absolute %local-file-absolute-file-name) ;promise string
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(name local-file-name) ;string
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(recursive? local-file-recursive?) ;Boolean
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(select? local-file-select?)) ;string stat -> Boolean
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(define (true file stat) #t)
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(define* (%local-file file promise #:optional (name (basename file))
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#:key
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(literal? #t) location
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recursive? (select? true))
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||
;; This intermediate procedure is part of our ABI, but the underlying
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||
;; %%LOCAL-FILE is not.
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||
(when (and (not literal?) (not (string-prefix? "/" file)))
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(warning (and=> location source-properties->location)
|
||
(G_ "resolving '~a' relative to current directory~%")
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file))
|
||
(%%local-file file promise name recursive? select?))
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||
|
||
(define (absolute-file-name file directory)
|
||
"Return the canonical absolute file name for FILE, which lives in the
|
||
vicinity of DIRECTORY."
|
||
(canonicalize-path
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||
(cond ((string-prefix? "/" file) file)
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||
((not directory) file)
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||
((string-prefix? "/" directory)
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(string-append directory "/" file))
|
||
(else file))))
|
||
|
||
(define-syntax-rule (assume-valid-file-name file)
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||
"This is a syntactic keyword to tell 'local-file' that it can assume that
|
||
the given file name is valid, even if it's not a string literal, and thus not
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||
warn about it."
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||
file)
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||
|
||
(define-syntax local-file
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||
(lambda (s)
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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. If FILE is a relative file name, it is looked
|
||
up relative to the source file where this form appears. FILE will be added to
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the store under NAME--by default the base name of FILE.
|
||
|
||
When RECURSIVE? is true, the contents of FILE are added recursively; if FILE
|
||
designates a flat file and RECURSIVE? is true, its contents are added, and its
|
||
permission bits are kept.
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||
|
||
When RECURSIVE? is true, call (SELECT? FILE STAT) for each directory entry,
|
||
where FILE is the entry's absolute file name and STAT is the result of
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'lstat'; exclude entries for which SELECT? does not return true.
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||
|
||
This is the declarative counterpart of the 'interned-file' monadic procedure.
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||
It is implemented as a macro to capture the current source directory where it
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||
appears."
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||
(syntax-case s (assume-valid-file-name)
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||
((_ file rest ...)
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||
(string? (syntax->datum #'file))
|
||
;; FILE is a literal, so resolve it relative to the source directory.
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||
#'(%local-file file
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||
(delay (absolute-file-name file (current-source-directory)))
|
||
rest ...))
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||
((_ (assume-valid-file-name file) rest ...)
|
||
;; FILE is not a literal, so resolve it relative to the current
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||
;; directory. Since the user declared FILE is valid, do not pass
|
||
;; #:literal? #f so that we do not warn about it later on.
|
||
#'(%local-file file
|
||
(delay (absolute-file-name file (getcwd)))
|
||
rest ...))
|
||
((_ file rest ...)
|
||
;; Resolve FILE relative to the current directory.
|
||
(with-syntax ((location (datum->syntax s (syntax-source s))))
|
||
#`(%local-file file
|
||
(delay (absolute-file-name file (getcwd)))
|
||
rest ...
|
||
#:location 'location
|
||
#:literal? #f))) ;warn if FILE is relative
|
||
((_)
|
||
#'(syntax-error "missing file name"))
|
||
(id
|
||
(identifier? #'id)
|
||
;; XXX: We could return #'(lambda (file . rest) ...). However,
|
||
;; (syntax-source #'id) is #f so (current-source-directory) would not
|
||
;; work. Thus, simply forbid this form.
|
||
#'(syntax-error
|
||
"'local-file' is a macro and cannot be used like this")))))
|
||
|
||
(define (local-file-absolute-file-name file)
|
||
"Return the absolute file name for FILE, a <local-file> instance. A
|
||
'system-error' exception is raised if FILE could not be found."
|
||
(force (%local-file-absolute-file-name file)))
|
||
|
||
(define-gexp-compiler (local-file-compiler (file <local-file>) system target)
|
||
;; "Compile" FILE by adding it to the store.
|
||
(match file
|
||
(($ <local-file> file (= force absolute) name recursive? select?)
|
||
;; Canonicalize FILE so that if it's a symlink, it is resolved. Failing
|
||
;; to do that, when RECURSIVE? is #t, we could end up creating a dangling
|
||
;; symlink in the store, and when RECURSIVE? is #f 'add-to-store' would
|
||
;; just throw an error, both of which are inconvenient.
|
||
(interned-file absolute name
|
||
#:recursive? recursive? #:select? select?))))
|
||
|
||
(define-record-type <plain-file>
|
||
(%plain-file name content references)
|
||
plain-file?
|
||
(name plain-file-name) ;string
|
||
(content plain-file-content) ;string or bytevector
|
||
(references plain-file-references)) ;list (currently unused)
|
||
|
||
(define (plain-file name content)
|
||
"Return an object representing a text file called NAME with the given
|
||
CONTENT (a string) to be added to the store.
|
||
|
||
This is the declarative counterpart of 'text-file'."
|
||
;; XXX: For now just ignore 'references' because it's not clear how to use
|
||
;; them in a declarative context.
|
||
(%plain-file name content '()))
|
||
|
||
(define-gexp-compiler (plain-file-compiler (file <plain-file>) system target)
|
||
;; "Compile" FILE by adding it to the store.
|
||
(match file
|
||
(($ <plain-file> name (and (? string?) content) references)
|
||
(text-file name content references))
|
||
(($ <plain-file> name (and (? bytevector?) content) references)
|
||
(binary-file name content references))))
|
||
|
||
(define-record-type <computed-file>
|
||
(%computed-file name gexp guile options)
|
||
computed-file?
|
||
(name computed-file-name) ;string
|
||
(gexp computed-file-gexp) ;gexp
|
||
(guile computed-file-guile) ;<package>
|
||
(options computed-file-options)) ;list of arguments
|
||
|
||
(define* (computed-file name gexp
|
||
#:key guile (local-build? #t) (options '()))
|
||
"Return an object representing the store item NAME, a file or directory
|
||
computed by GEXP. When LOCAL-BUILD? is #t (the default), it ensures the
|
||
corresponding derivation is built locally. OPTIONS may be used to pass
|
||
additional arguments to 'gexp->derivation'.
|
||
|
||
This is the declarative counterpart of 'gexp->derivation'."
|
||
(let ((options* `(#:local-build? ,local-build? ,@options)))
|
||
(%computed-file name gexp guile options*)))
|
||
|
||
(define-gexp-compiler (computed-file-compiler (file <computed-file>)
|
||
system target)
|
||
;; Compile FILE by returning a derivation whose build expression is its
|
||
;; gexp.
|
||
(match file
|
||
(($ <computed-file> name gexp guile options)
|
||
(if guile
|
||
(mlet %store-monad ((guile (lower-object guile system
|
||
#:target target)))
|
||
(apply gexp->derivation name gexp #:guile-for-build guile
|
||
#:system system #:target target options))
|
||
(apply gexp->derivation name gexp
|
||
#:system system #:target target options)))))
|
||
|
||
(define-record-type <program-file>
|
||
(%program-file name gexp guile path)
|
||
program-file?
|
||
(name program-file-name) ;string
|
||
(gexp program-file-gexp) ;gexp
|
||
(guile program-file-guile) ;package
|
||
(path program-file-module-path)) ;list of strings
|
||
|
||
(define* (program-file name gexp #:key (guile #f) (module-path %load-path))
|
||
"Return an object representing the executable store item NAME that runs
|
||
GEXP. GUILE is the Guile package used to execute that script. Imported
|
||
modules of GEXP are looked up in MODULE-PATH.
|
||
|
||
This is the declarative counterpart of 'gexp->script'."
|
||
(%program-file name gexp guile module-path))
|
||
|
||
(define-gexp-compiler (program-file-compiler (file <program-file>)
|
||
system target)
|
||
;; Compile FILE by returning a derivation that builds the script.
|
||
(match file
|
||
(($ <program-file> name gexp guile module-path)
|
||
(gexp->script name gexp
|
||
#:module-path module-path
|
||
#:guile (or guile (default-guile))
|
||
#:system system
|
||
#:target target))))
|
||
|
||
(define-record-type <scheme-file>
|
||
(%scheme-file name gexp splice? load-path?)
|
||
scheme-file?
|
||
(name scheme-file-name) ;string
|
||
(gexp scheme-file-gexp) ;gexp
|
||
(splice? scheme-file-splice?) ;Boolean
|
||
(load-path? scheme-file-set-load-path?)) ;Boolean
|
||
|
||
(define* (scheme-file name gexp #:key splice? (set-load-path? #t))
|
||
"Return an object representing the Scheme file NAME that contains GEXP.
|
||
|
||
This is the declarative counterpart of 'gexp->file'."
|
||
(%scheme-file name gexp splice? set-load-path?))
|
||
|
||
(define-gexp-compiler (scheme-file-compiler (file <scheme-file>)
|
||
system target)
|
||
;; Compile FILE by returning a derivation that builds the file.
|
||
(match file
|
||
(($ <scheme-file> name gexp splice? set-load-path?)
|
||
(gexp->file name gexp
|
||
#:set-load-path? set-load-path?
|
||
#:splice? splice?
|
||
#:system system
|
||
#:target target))))
|
||
|
||
;; Appending SUFFIX to BASE's output file name.
|
||
(define-record-type <file-append>
|
||
(%file-append base suffix)
|
||
file-append?
|
||
(base file-append-base) ;<package> | <derivation> | ...
|
||
(suffix file-append-suffix)) ;list of strings
|
||
|
||
(define (write-file-append file port)
|
||
(match file
|
||
(($ <file-append> base suffix)
|
||
(format port "#<file-append ~s ~s>" base
|
||
(string-join suffix)))))
|
||
|
||
(set-record-type-printer! <file-append> write-file-append)
|
||
|
||
(define (file-append base . suffix)
|
||
"Return a <file-append> object that expands to the concatenation of BASE and
|
||
SUFFIX."
|
||
(%file-append base suffix))
|
||
|
||
(define-gexp-compiler file-append-compiler <file-append>
|
||
compiler => (lambda (obj system target)
|
||
(match obj
|
||
(($ <file-append> base _)
|
||
(lower-object base system #:target target))))
|
||
expander => (lambda (obj lowered output)
|
||
(match obj
|
||
(($ <file-append> base suffix)
|
||
(let* ((expand (lookup-expander base))
|
||
(base (expand base lowered output)))
|
||
(string-append base (string-concatenate suffix)))))))
|
||
|
||
;; Representation of SRFI-39 parameter settings in the dynamic scope of an
|
||
;; object lowering.
|
||
(define-record-type <parameterized>
|
||
(parameterized bindings thunk)
|
||
parameterized?
|
||
(bindings parameterized-bindings) ;list of parameter/value pairs
|
||
(thunk parameterized-thunk)) ;thunk
|
||
|
||
(define-syntax-rule (with-parameters ((param value) ...) body ...)
|
||
"Bind each PARAM to the corresponding VALUE for the extent during which BODY
|
||
is lowered. Consider this example:
|
||
|
||
(with-parameters ((%current-system \"x86_64-linux\"))
|
||
coreutils)
|
||
|
||
It returns a <parameterized> object that ensures %CURRENT-SYSTEM is set to
|
||
x86_64-linux when COREUTILS is lowered."
|
||
(parameterized (list (list param (lambda () value)) ...)
|
||
(lambda ()
|
||
body ...)))
|
||
|
||
(define-gexp-compiler compile-parameterized <parameterized>
|
||
compiler =>
|
||
(lambda (parameterized system target)
|
||
(match (parameterized-bindings parameterized)
|
||
(((parameters values) ...)
|
||
(let ((fluids (map parameter-fluid parameters))
|
||
(thunk (parameterized-thunk parameterized)))
|
||
;; Install the PARAMETERS for the dynamic extent of THUNK.
|
||
(with-fluids* fluids
|
||
(map (lambda (thunk) (thunk)) values)
|
||
(lambda ()
|
||
;; Special-case '%current-system' and '%current-target-system' to
|
||
;; make sure we get the desired effect.
|
||
(let ((system (if (memq %current-system parameters)
|
||
(%current-system)
|
||
system))
|
||
(target (if (memq %current-target-system parameters)
|
||
(%current-target-system)
|
||
target)))
|
||
(lower-object (thunk) system #:target target))))))))
|
||
|
||
expander => (lambda (parameterized lowered output)
|
||
(match (parameterized-bindings parameterized)
|
||
(((parameters values) ...)
|
||
(let ((fluids (map parameter-fluid parameters))
|
||
(thunk (parameterized-thunk parameterized)))
|
||
;; Install the PARAMETERS for the dynamic extent of THUNK.
|
||
(with-fluids* fluids
|
||
(map (lambda (thunk) (thunk)) values)
|
||
(lambda ()
|
||
;; Delegate to the expander of the wrapped object.
|
||
(let* ((base (thunk))
|
||
(expand (lookup-expander base)))
|
||
(expand base lowered output)))))))))
|
||
|
||
|
||
;;;
|
||
;;; Inputs & outputs.
|
||
;;;
|
||
|
||
;; The input of a gexp.
|
||
(define-record-type <gexp-input>
|
||
(%gexp-input thing output native?)
|
||
gexp-input?
|
||
(thing gexp-input-thing) ;<package> | <origin> | <derivation> | ...
|
||
(output gexp-input-output) ;string
|
||
(native? gexp-input-native?)) ;Boolean
|
||
|
||
(define (write-gexp-input input port)
|
||
(match input
|
||
(($ <gexp-input> thing output #f)
|
||
(format port "#<gexp-input ~s:~a>" thing output))
|
||
(($ <gexp-input> thing output #t)
|
||
(format port "#<gexp-input native ~s:~a>" thing output))))
|
||
|
||
(set-record-type-printer! <gexp-input> write-gexp-input)
|
||
|
||
(define* (gexp-input thing ;convenience procedure
|
||
#:optional (output "out")
|
||
#:key native?)
|
||
"Return a new <gexp-input> for the OUTPUT of THING; NATIVE? determines
|
||
whether this should be considered a \"native\" input or not."
|
||
(%gexp-input thing output native?))
|
||
|
||
;; Reference to one of the derivation's outputs, for gexps used in
|
||
;; derivations.
|
||
(define-record-type <gexp-output>
|
||
(gexp-output name)
|
||
gexp-output?
|
||
(name gexp-output-name))
|
||
|
||
(define (write-gexp-output output port)
|
||
(match output
|
||
(($ <gexp-output> name)
|
||
(format port "#<gexp-output ~a>" name))))
|
||
|
||
(set-record-type-printer! <gexp-output> write-gexp-output)
|
||
|
||
(define* (gexp-attribute gexp self-attribute #:optional (equal? equal?)
|
||
#:key (validate (const #t)))
|
||
"Recurse on GEXP and the expressions it refers to, summing the items
|
||
returned by SELF-ATTRIBUTE, a procedure that takes a gexp. Use EQUAL? as the
|
||
second argument to 'delete-duplicates'. Pass VALIDATE every gexp and
|
||
attribute that is traversed."
|
||
(if (gexp? gexp)
|
||
(delete-duplicates
|
||
(append (let ((attribute (self-attribute gexp)))
|
||
(validate gexp attribute)
|
||
attribute)
|
||
(reverse
|
||
(fold (lambda (input result)
|
||
(match input
|
||
(($ <gexp-input> (? gexp? exp))
|
||
(append (gexp-attribute exp self-attribute
|
||
#:validate validate)
|
||
result))
|
||
(($ <gexp-input> (lst ...))
|
||
(fold/tree (lambda (obj result)
|
||
(match obj
|
||
((? gexp? exp)
|
||
(append (gexp-attribute exp self-attribute
|
||
#:validate validate)
|
||
result))
|
||
(_
|
||
result)))
|
||
result
|
||
lst))
|
||
(_
|
||
result)))
|
||
'()
|
||
(gexp-references gexp))))
|
||
equal?)
|
||
'())) ;plain Scheme data type
|
||
|
||
(define (gexp-modules gexp)
|
||
"Return the list of Guile module names GEXP relies on. If (gexp? GEXP) is
|
||
false, meaning that GEXP is a plain Scheme object, return the empty list."
|
||
(define (module=? m1 m2)
|
||
;; Return #t when M1 equals M2. Special-case '=>' specs because their
|
||
;; right-hand side may not be comparable with 'equal?': it's typically a
|
||
;; file-like object that embeds a gexp, which in turn embeds closure;
|
||
;; those closures may be 'eq?' when running compiled code but are unlikely
|
||
;; to be 'eq?' when running on 'eval'. Ignore the right-hand side to
|
||
;; avoid this discrepancy.
|
||
(match m1
|
||
(((name1 ...) '=> _)
|
||
(match m2
|
||
(((name2 ...) '=> _) (equal? name1 name2))
|
||
(_ #f)))
|
||
(_
|
||
(equal? m1 m2))))
|
||
|
||
(define (validate-modules gexp modules)
|
||
;; Warn if MODULES, imported by GEXP, contains modules that in general
|
||
;; should not be imported from the host because they vary from user to
|
||
;; user and may thus be a source of non-reproducibility. This includes
|
||
;; (guix config) as well as modules that come with Guile.
|
||
(match (filter (match-lambda
|
||
((or ('guix 'config) ('ice-9 . _)) #t)
|
||
(_ #f))
|
||
modules)
|
||
(() #t)
|
||
(suspects
|
||
(warning (gexp-location gexp)
|
||
(N_ "importing module~{ ~a~} from the host~%"
|
||
"importing modules~{ ~a~} from the host~%"
|
||
(length suspects))
|
||
suspects))))
|
||
|
||
(gexp-attribute gexp gexp-self-modules module=?
|
||
#:validate validate-modules))
|
||
|
||
(define (gexp-extensions gexp)
|
||
"Return the list of Guile extensions (packages) GEXP relies on. If (gexp?
|
||
GEXP) is false, meaning that GEXP is a plain Scheme object, return the empty
|
||
list."
|
||
(gexp-attribute gexp gexp-self-extensions))
|
||
|
||
(define (self-quoting? x)
|
||
(letrec-syntax ((one-of (syntax-rules ()
|
||
((_) #f)
|
||
((_ pred rest ...)
|
||
(or (pred x)
|
||
(one-of rest ...))))))
|
||
(one-of symbol? string? keyword? pair? null? array?
|
||
number? boolean? char?)))
|
||
|
||
(define (lower-inputs inputs system target)
|
||
"Turn any object from INPUTS into a derivation input for SYSTEM or a store
|
||
item (a \"source\"); return the corresponding input list as a monadic value.
|
||
When TARGET is true, use it as the cross-compilation target triplet."
|
||
(define (store-item? obj)
|
||
(and (string? obj) (store-path? obj)))
|
||
|
||
(define filterm
|
||
(lift1 (cut filter ->bool <>) %store-monad))
|
||
|
||
(with-monad %store-monad
|
||
(>>= (mapm/accumulate-builds
|
||
(match-lambda
|
||
(($ <gexp-input> (? store-item? item))
|
||
(return item))
|
||
(($ <gexp-input> thing output native?)
|
||
(mlet %store-monad ((obj (lower-object thing system
|
||
#:target
|
||
(and (not native?)
|
||
target))))
|
||
(return (match obj
|
||
((? derivation? drv)
|
||
(derivation-input drv (list output)))
|
||
((? store-item? item)
|
||
item)
|
||
((? self-quoting?)
|
||
;; Some inputs such as <system-binding> can lower to
|
||
;; a self-quoting object that FILTERM will filter
|
||
;; out.
|
||
#f))))))
|
||
inputs)
|
||
filterm)))
|
||
|
||
(define* (lower-reference-graphs graphs #:key system target)
|
||
"Given GRAPHS, a list of (FILE-NAME INPUT ...) lists for use as a
|
||
#:reference-graphs argument, lower it such that each INPUT is replaced by the
|
||
corresponding <derivation-input> or store item."
|
||
(define tuple->gexp-input
|
||
(match-lambda
|
||
((thing)
|
||
(%gexp-input thing "out" (not target)))
|
||
((thing output)
|
||
(%gexp-input thing output (not target)))))
|
||
|
||
(match graphs
|
||
(((file-names . inputs) ...)
|
||
(mlet %store-monad ((inputs (lower-inputs (map tuple->gexp-input inputs)
|
||
system target)))
|
||
(return (map cons file-names inputs))))))
|
||
|
||
(define* (lower-references lst #:key system target)
|
||
"Based on LST, a list of output names and packages, return a list of output
|
||
names and file names suitable for the #:allowed-references argument to
|
||
'derivation'."
|
||
(with-monad %store-monad
|
||
(define lower
|
||
(match-lambda
|
||
((? string? output)
|
||
(return output))
|
||
(($ <gexp-input> thing output native?)
|
||
(mlet %store-monad ((drv (lower-object thing system
|
||
#:target (if native?
|
||
#f target))))
|
||
(return (derivation->output-path drv output))))
|
||
(thing
|
||
(mlet %store-monad ((drv (lower-object thing system
|
||
#:target target)))
|
||
(return (derivation->output-path drv))))))
|
||
|
||
(mapm/accumulate-builds lower lst)))
|
||
|
||
(define default-guile-derivation
|
||
;; Here we break the abstraction by talking to the higher-level layer.
|
||
;; Thus, do the resolution lazily to hide the circular dependency.
|
||
(let ((proc (delay
|
||
(let ((iface (resolve-interface '(guix packages))))
|
||
(module-ref iface 'default-guile-derivation)))))
|
||
(lambda (system)
|
||
((force proc) system))))
|
||
|
||
;; Representation of a gexp instantiated for a given target and system.
|
||
;; It's an intermediate representation between <gexp> and <derivation>.
|
||
(define-record-type <lowered-gexp>
|
||
(lowered-gexp sexp inputs sources guile load-path load-compiled-path)
|
||
lowered-gexp?
|
||
(sexp lowered-gexp-sexp) ;sexp
|
||
(inputs lowered-gexp-inputs) ;list of <derivation-input>
|
||
(sources lowered-gexp-sources) ;list of store items
|
||
(guile lowered-gexp-guile) ;<derivation-input> | #f
|
||
(load-path lowered-gexp-load-path) ;list of store items
|
||
(load-compiled-path lowered-gexp-load-compiled-path)) ;list of store items
|
||
|
||
(define* (imported+compiled-modules modules system
|
||
#:key (extensions '())
|
||
deprecation-warnings guile
|
||
(module-path %load-path))
|
||
"Return a pair where the first element is the imported MODULES and the
|
||
second element is the derivation to compile them."
|
||
(mcached equal?
|
||
(mlet %store-monad ((modules (if (pair? modules)
|
||
(imported-modules modules
|
||
#:guile guile
|
||
#:system system
|
||
#:module-path module-path)
|
||
(return #f)))
|
||
(compiled (if (pair? modules)
|
||
(compiled-modules modules
|
||
#:system system
|
||
#:module-path module-path
|
||
#:extensions extensions
|
||
#:guile guile
|
||
#:deprecation-warnings
|
||
deprecation-warnings)
|
||
(return #f))))
|
||
(return (cons modules compiled)))
|
||
modules
|
||
system extensions guile deprecation-warnings module-path))
|
||
|
||
(define (sexp->string sexp)
|
||
"Like 'object->string', but deterministic and slightly faster."
|
||
;; Explicitly use UTF-8 for determinism, and also because UTF-8 output is
|
||
;; faster.
|
||
(with-fluids ((%default-port-encoding "UTF-8"))
|
||
(call-with-output-string
|
||
(lambda (port)
|
||
(write sexp port)))))
|
||
|
||
(define* (lower-gexp exp
|
||
#:key
|
||
(module-path %load-path)
|
||
(system (%current-system))
|
||
(target 'current)
|
||
(graft? (%graft?))
|
||
(guile-for-build (%guile-for-build))
|
||
(effective-version "3.0")
|
||
|
||
deprecation-warnings)
|
||
"*Note: This API is subject to change; use at your own risk!*
|
||
|
||
Lower EXP, a gexp, instantiating it for SYSTEM and TARGET. Return a
|
||
<lowered-gexp> ready to be used.
|
||
|
||
Lowered gexps are an intermediate representation that's useful for
|
||
applications that deal with gexps outside in a way that is disconnected from
|
||
derivations--e.g., code evaluated for its side effects."
|
||
(define %modules
|
||
(delete-duplicates (gexp-modules exp)))
|
||
|
||
(define (search-path modules extensions suffix)
|
||
(append (match modules
|
||
((? derivation? drv)
|
||
(list (derivation->output-path drv)))
|
||
(#f
|
||
'())
|
||
((? store-path? item)
|
||
(list item)))
|
||
(map (lambda (extension)
|
||
(string-append (match extension
|
||
((? derivation? drv)
|
||
(derivation->output-path drv))
|
||
((? store-path? item)
|
||
item))
|
||
suffix))
|
||
extensions)))
|
||
|
||
(mlet* %store-monad ( ;; The following binding forces '%current-system' and
|
||
;; '%current-target-system' to be looked up at >>=
|
||
;; time.
|
||
(graft? (set-grafting graft?))
|
||
|
||
(system -> (or system (%current-system)))
|
||
(target -> (if (eq? target 'current)
|
||
(%current-target-system)
|
||
target))
|
||
(guile (if guile-for-build
|
||
(return guile-for-build)
|
||
(default-guile-derivation system)))
|
||
(inputs (lower-inputs (gexp-inputs exp)
|
||
system target))
|
||
(sexp (gexp->sexp exp system target))
|
||
(extensions -> (gexp-extensions exp))
|
||
(exts (mapm %store-monad
|
||
(lambda (obj)
|
||
(lower-object obj system
|
||
#:target #f))
|
||
extensions))
|
||
(modules+compiled (imported+compiled-modules
|
||
%modules system
|
||
#:extensions extensions
|
||
#:deprecation-warnings
|
||
deprecation-warnings
|
||
#:guile guile
|
||
#:module-path module-path))
|
||
(modules -> (car modules+compiled))
|
||
(compiled -> (cdr modules+compiled)))
|
||
(define load-path
|
||
(search-path modules exts
|
||
(string-append "/share/guile/site/" effective-version)))
|
||
|
||
(define load-compiled-path
|
||
(search-path compiled exts
|
||
(string-append "/lib/guile/" effective-version
|
||
"/site-ccache")))
|
||
|
||
(mbegin %store-monad
|
||
(set-grafting graft?) ;restore the initial setting
|
||
(return (lowered-gexp sexp
|
||
`(,@(if (derivation? modules)
|
||
(list (derivation-input modules))
|
||
'())
|
||
,@(if compiled
|
||
(list (derivation-input compiled))
|
||
'())
|
||
,@(map derivation-input exts)
|
||
,@(filter derivation-input? inputs))
|
||
(filter string? (cons modules inputs))
|
||
(derivation-input guile '("out"))
|
||
load-path
|
||
load-compiled-path)))))
|
||
|
||
(define* (gexp->derivation name exp
|
||
#:key
|
||
system (target 'current)
|
||
hash hash-algo recursive?
|
||
(env-vars '())
|
||
(modules '())
|
||
(module-path %load-path)
|
||
(guile-for-build (%guile-for-build))
|
||
(effective-version "3.0")
|
||
(graft? (%graft?))
|
||
references-graphs
|
||
allowed-references disallowed-references
|
||
leaked-env-vars
|
||
local-build? (substitutable? #t)
|
||
(properties '())
|
||
deprecation-warnings
|
||
(script-name (string-append name "-builder")))
|
||
"Return a derivation NAME that runs EXP (a gexp) with GUILE-FOR-BUILD (a
|
||
derivation) on SYSTEM; EXP is stored in a file called SCRIPT-NAME. When
|
||
TARGET is true, it is used as the cross-compilation target triplet for
|
||
packages referred to by EXP.
|
||
|
||
MODULES is deprecated in favor of 'with-imported-modules'. Its meaning is to
|
||
make MODULES available in the evaluation context of EXP; MODULES is a list of
|
||
names of Guile modules searched in MODULE-PATH to be copied in the store,
|
||
compiled, and made available in the load path during the execution of
|
||
EXP---e.g., '((guix build utils) (guix build gnu-build-system)).
|
||
|
||
EFFECTIVE-VERSION determines the string to use when adding extensions of
|
||
EXP (see 'with-extensions') to the search path---e.g., \"2.2\".
|
||
|
||
GRAFT? determines whether packages referred to by EXP should be grafted when
|
||
applicable.
|
||
|
||
When REFERENCES-GRAPHS is true, it must be a list of tuples of one of the
|
||
following forms:
|
||
|
||
(FILE-NAME PACKAGE)
|
||
(FILE-NAME PACKAGE OUTPUT)
|
||
(FILE-NAME DERIVATION)
|
||
(FILE-NAME DERIVATION OUTPUT)
|
||
(FILE-NAME STORE-ITEM)
|
||
|
||
The right-hand-side of each element of REFERENCES-GRAPHS is automatically made
|
||
an input of the build process of EXP. In the build environment, each
|
||
FILE-NAME contains the reference graph of the corresponding item, in a simple
|
||
text format.
|
||
|
||
ALLOWED-REFERENCES must be either #f or a list of output names and packages.
|
||
In the latter case, the list denotes store items that the result is allowed to
|
||
refer to. Any reference to another store item will lead to a build error.
|
||
Similarly for DISALLOWED-REFERENCES, which can list items that must not be
|
||
referenced by the outputs.
|
||
|
||
DEPRECATION-WARNINGS determines whether to show deprecation warnings while
|
||
compiling modules. It can be #f, #t, or 'detailed.
|
||
|
||
The other arguments are as for 'derivation'."
|
||
(define outputs (gexp-outputs exp))
|
||
(define requested-graft? graft?)
|
||
|
||
(define (graphs-file-names graphs)
|
||
;; Return a list of (FILE-NAME . STORE-PATH) pairs made from GRAPHS.
|
||
(map (match-lambda
|
||
((file-name . (? derivation-input? input))
|
||
(cons file-name (first (derivation-input-output-paths input))))
|
||
((file-name . (? string? item))
|
||
(cons file-name item)))
|
||
graphs))
|
||
|
||
(define (add-modules exp modules)
|
||
(if (null? modules)
|
||
exp
|
||
(make-gexp (gexp-references exp)
|
||
(append modules (gexp-self-modules exp))
|
||
(gexp-self-extensions exp)
|
||
(gexp-proc exp)
|
||
(gexp-location exp))))
|
||
|
||
(mlet* %store-monad ( ;; The following binding forces '%current-system' and
|
||
;; '%current-target-system' to be looked up at >>=
|
||
;; time.
|
||
(graft? (set-grafting graft?))
|
||
|
||
(system -> (or system (%current-system)))
|
||
(target -> (if (eq? target 'current)
|
||
(%current-target-system)
|
||
target))
|
||
(exp -> (add-modules exp modules))
|
||
(lowered (lower-gexp exp
|
||
#:module-path module-path
|
||
#:system system
|
||
#:target target
|
||
#:graft? requested-graft?
|
||
#:guile-for-build
|
||
guile-for-build
|
||
#:effective-version
|
||
effective-version
|
||
#:deprecation-warnings
|
||
deprecation-warnings))
|
||
|
||
(graphs (if references-graphs
|
||
(lower-reference-graphs references-graphs
|
||
#:system system
|
||
#:target target)
|
||
(return #f)))
|
||
(allowed (if allowed-references
|
||
(lower-references allowed-references
|
||
#:system system
|
||
#:target target)
|
||
(return #f)))
|
||
(disallowed (if disallowed-references
|
||
(lower-references disallowed-references
|
||
#:system system
|
||
#:target target)
|
||
(return #f)))
|
||
(guile -> (lowered-gexp-guile lowered))
|
||
(builder (text-file script-name
|
||
(sexp->string
|
||
(lowered-gexp-sexp lowered)))))
|
||
(mbegin %store-monad
|
||
(set-grafting graft?) ;restore the initial setting
|
||
(raw-derivation name
|
||
(string-append (derivation-input-output-path guile)
|
||
"/bin/guile")
|
||
`("--no-auto-compile"
|
||
,@(append-map (lambda (directory)
|
||
`("-L" ,directory))
|
||
(lowered-gexp-load-path lowered))
|
||
,@(append-map (lambda (directory)
|
||
`("-C" ,directory))
|
||
(lowered-gexp-load-compiled-path lowered))
|
||
,builder)
|
||
#:outputs outputs
|
||
#:env-vars env-vars
|
||
#:system system
|
||
#:inputs `(,guile
|
||
,@(lowered-gexp-inputs lowered)
|
||
,@(match graphs
|
||
(((_ . inputs) ...)
|
||
(filter derivation-input? inputs))
|
||
(#f '())))
|
||
#:sources `(,builder
|
||
,@(if (and (string? modules)
|
||
(store-path? modules))
|
||
(list modules)
|
||
'())
|
||
,@(lowered-gexp-sources lowered)
|
||
,@(match graphs
|
||
(((_ . inputs) ...)
|
||
(filter string? inputs))
|
||
(#f '())))
|
||
|
||
#:hash hash #:hash-algo hash-algo #:recursive? recursive?
|
||
#:references-graphs (and=> graphs graphs-file-names)
|
||
#:allowed-references allowed
|
||
#:disallowed-references disallowed
|
||
#:leaked-env-vars leaked-env-vars
|
||
#:local-build? local-build?
|
||
#:substitutable? substitutable?
|
||
#:properties properties))))
|
||
|
||
(define (fold/tree proc seed lst)
|
||
"Like 'fold', but recurse into sub-lists of LST and accept improper lists."
|
||
(let loop ((obj lst)
|
||
(result seed))
|
||
(match obj
|
||
((head . tail)
|
||
(loop tail (loop head result)))
|
||
(_
|
||
(proc obj result)))))
|
||
|
||
(define (gexp-inputs exp)
|
||
"Return the list of <gexp-input> for EXP."
|
||
(define set-gexp-input-native?
|
||
(match-lambda
|
||
(($ <gexp-input> thing output)
|
||
(%gexp-input thing output #t))))
|
||
|
||
(define (interesting? obj)
|
||
(or (file-like? obj)
|
||
(and (string? obj) (direct-store-path? obj))))
|
||
|
||
(define (add-reference-inputs ref result)
|
||
(match ref
|
||
(($ <gexp-input> (? gexp? exp) _ #t)
|
||
(append (map set-gexp-input-native? (gexp-inputs exp))
|
||
result))
|
||
(($ <gexp-input> (? gexp? exp) _ #f)
|
||
(append (gexp-inputs exp) result))
|
||
(($ <gexp-input> (? string? str))
|
||
(if (direct-store-path? str)
|
||
(cons ref result)
|
||
result))
|
||
(($ <gexp-input> (? struct? thing) output n?)
|
||
(if (lookup-compiler thing)
|
||
;; THING is a derivation, or a package, or an origin, etc.
|
||
(cons ref result)
|
||
result))
|
||
(($ <gexp-input> (? pair? lst) output n?)
|
||
;; XXX: Scan LST for inputs. Inherit N?.
|
||
(fold/tree (lambda (obj result)
|
||
(match obj
|
||
((? gexp-input? x)
|
||
(cons (%gexp-input (gexp-input-thing x)
|
||
(gexp-input-output x)
|
||
n?)
|
||
result))
|
||
((? interesting? x)
|
||
(cons (%gexp-input x "out" n?) result))
|
||
((? gexp? x)
|
||
(append (gexp-inputs x) result))
|
||
(_
|
||
result)))
|
||
result
|
||
lst))
|
||
(_
|
||
;; Ignore references to other kinds of objects.
|
||
result)))
|
||
|
||
(fold-right add-reference-inputs
|
||
'()
|
||
(gexp-references exp)))
|
||
|
||
(define (gexp-outputs exp)
|
||
"Return the outputs referred to by EXP as a list of strings."
|
||
(define (add-reference-output ref result)
|
||
(match ref
|
||
(($ <gexp-output> name)
|
||
(cons name result))
|
||
(($ <gexp-input> (? gexp? exp))
|
||
(append (gexp-outputs exp) result))
|
||
(($ <gexp-input> (? pair? lst))
|
||
;; XXX: Scan LST for outputs.
|
||
(fold/tree (lambda (obj result)
|
||
(match obj
|
||
(($ <gexp-output> name) (cons name result))
|
||
((? gexp? x) (append (gexp-outputs x) result))
|
||
(_ result)))
|
||
result
|
||
lst))
|
||
(_
|
||
result)))
|
||
|
||
(delete-duplicates
|
||
(fold add-reference-output '() (gexp-references exp))))
|
||
|
||
(define (gexp->sexp exp system target)
|
||
"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 (if (or n? native?) #f target)))
|
||
(($ <gexp-input> (refs ...) output n?)
|
||
(mapm %store-monad
|
||
(lambda (ref)
|
||
;; XXX: Automatically convert REF to an gexp-input.
|
||
(if (or (symbol? ref) (number? ref)
|
||
(boolean? ref) (null? ref) (array? ref))
|
||
(return ref)
|
||
(reference->sexp
|
||
(if (gexp-input? ref)
|
||
ref
|
||
(%gexp-input ref "out" n?))
|
||
(or n? native?))))
|
||
refs))
|
||
(($ <gexp-input> (? struct? thing) output n?)
|
||
(let ((target (if (or n? native?) #f target)))
|
||
(lower+expand-object thing system
|
||
#:target target
|
||
#:output output)))
|
||
(($ <gexp-input> (? self-quoting? x))
|
||
(return x))
|
||
(($ <gexp-input> x)
|
||
(raise (condition (&gexp-input-error (input x)))))
|
||
(x
|
||
(return x)))))
|
||
|
||
(mlet %store-monad
|
||
((args (mapm %store-monad
|
||
reference->sexp (gexp-references exp))))
|
||
(return (apply (gexp-proc exp) args))))
|
||
|
||
(define-syntax-parameter current-imported-modules
|
||
;; Current list of imported modules.
|
||
(identifier-syntax '()))
|
||
|
||
(define-syntax-rule (with-imported-modules modules body ...)
|
||
"Mark the gexps defined in BODY... as requiring MODULES in their execution
|
||
environment."
|
||
(syntax-parameterize ((current-imported-modules
|
||
(identifier-syntax modules)))
|
||
body ...))
|
||
|
||
(define-syntax-parameter current-imported-extensions
|
||
;; Current list of extensions.
|
||
(identifier-syntax '()))
|
||
|
||
(define-syntax-rule (with-extensions extensions body ...)
|
||
"Mark the gexps defined in BODY... as requiring EXTENSIONS in their
|
||
execution environment."
|
||
(syntax-parameterize ((current-imported-extensions
|
||
(identifier-syntax extensions)))
|
||
body ...))
|
||
|
||
(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 _ ...)
|
||
(cons exp result))
|
||
((ungexp-native-splicing _ ...)
|
||
(cons exp result))
|
||
((exp0 . exp)
|
||
(let ((result (loop #'exp0 result)))
|
||
(loop #'exp result)))
|
||
(_
|
||
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)
|
||
(_ ;internal error
|
||
(with-syntax ((exp exp))
|
||
#'(syntax-error "error: no 'ungexp' substitution" exp)))))
|
||
|
||
(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"
|
||
exp))))))
|
||
|
||
(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* ((escapes (delete-duplicates (collect-escapes #'exp)))
|
||
(formals (generate-temporaries escapes))
|
||
(sexp (substitute-references #'exp (zip escapes formals)))
|
||
(refs (map escape->ref escapes)))
|
||
#`(make-gexp (list #,@refs)
|
||
current-imported-modules
|
||
current-imported-extensions
|
||
(lambda #,formals
|
||
#,sexp)
|
||
(current-source-location)))))))
|
||
|
||
|
||
;;;
|
||
;;; Module handling.
|
||
;;;
|
||
|
||
(define %utils-module
|
||
;; This file provides 'mkdir-p', needed to implement 'imported-files' and
|
||
;; other primitives below. Note: We give the file name relative to this
|
||
;; file you are currently reading; 'search-path' could return a file name
|
||
;; relative to the current working directory.
|
||
(local-file "build/utils.scm"
|
||
"build-utils.scm"))
|
||
|
||
(define* (imported-files/derivation files
|
||
#:key (name "file-import")
|
||
(symlink? #f)
|
||
(system (%current-system))
|
||
(guile (%guile-for-build)))
|
||
"Return a derivation that imports FILES into STORE. FILES must be a list
|
||
of (FINAL-PATH . FILE) pairs. Each FILE is mapped to FINAL-PATH in the
|
||
resulting store path. FILE can be either a file name, or a file-like object,
|
||
as returned by 'local-file' for example. If SYMLINK? is true, create symlinks
|
||
to the source files instead of copying them."
|
||
(define file-pair
|
||
(match-lambda
|
||
((final-path . (? string? file-name))
|
||
(mlet %store-monad ((file (interned-file file-name
|
||
(basename final-path))))
|
||
(return (list final-path file))))
|
||
((final-path . file-like)
|
||
(mlet %store-monad ((file (lower-object file-like system)))
|
||
(return (list final-path file))))))
|
||
|
||
(mlet %store-monad ((files (mapm %store-monad file-pair files)))
|
||
(define build
|
||
(gexp
|
||
(begin
|
||
(primitive-load (ungexp %utils-module)) ;for 'mkdir-p'
|
||
(use-modules (ice-9 match))
|
||
|
||
(mkdir (ungexp output)) (chdir (ungexp output))
|
||
(for-each (match-lambda
|
||
((final-path store-path)
|
||
(mkdir-p (dirname final-path))
|
||
((ungexp (if symlink? 'symlink 'copy-file))
|
||
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
|
||
#:substitutable? #f
|
||
|
||
;; Avoid deprecation warnings about the use of the _IO*
|
||
;; constants in (guix build utils).
|
||
#:env-vars
|
||
'(("GUILE_WARN_DEPRECATED" . "no")))))
|
||
|
||
(define* (imported-files files
|
||
#:key (name "file-import")
|
||
;; The following parameters make sense when creating
|
||
;; an actual derivation.
|
||
(system (%current-system))
|
||
(guile (%guile-for-build)))
|
||
"Import FILES into the store and return the resulting derivation or store
|
||
file name (a derivation is created if and only if some elements of FILES are
|
||
file-like objects and not local file names.) FILES must be a list
|
||
of (FINAL-PATH . FILE) pairs. Each FILE is mapped to FINAL-PATH in the
|
||
resulting store path. FILE can be either a file name, or a file-like object,
|
||
as returned by 'local-file' for example."
|
||
(if (any (match-lambda
|
||
((_ . (? struct? source)) #t)
|
||
(_ #f))
|
||
files)
|
||
(imported-files/derivation files #:name name
|
||
#:symlink? derivation?
|
||
#:system system #:guile guile)
|
||
(interned-file-tree `(,name directory
|
||
,@(file-mapping->tree files)))))
|
||
|
||
(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 either names of
|
||
modules to be found in the MODULE-PATH search path, or a module name followed
|
||
by an arrow followed by a file-like object. For example:
|
||
|
||
(imported-modules `((guix build utils)
|
||
(guix gcrypt)
|
||
((guix config) => ,(scheme-file …))))
|
||
|
||
In this example, the first two modules are taken from MODULE-PATH, and the
|
||
last one is created from the given <scheme-file> object."
|
||
(let ((files (map (match-lambda
|
||
(((module ...) '=> file)
|
||
(cons (module->source-file-name module)
|
||
file))
|
||
((module ...)
|
||
(let ((f (module->source-file-name module)))
|
||
(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))
|
||
target
|
||
(guile (%guile-for-build))
|
||
(module-path %load-path)
|
||
(extensions '())
|
||
(deprecation-warnings #f))
|
||
"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. When TARGET is true, cross-compile MODULES for
|
||
TARGET, a GNU triplet."
|
||
(define total (length modules))
|
||
|
||
(mlet %store-monad ((modules (imported-modules modules
|
||
#:system system
|
||
#:guile guile
|
||
#:module-path
|
||
module-path)))
|
||
(define build
|
||
(gexp
|
||
(begin
|
||
(primitive-load (ungexp %utils-module)) ;for 'mkdir-p'
|
||
|
||
(use-modules (ice-9 ftw)
|
||
(ice-9 format)
|
||
(srfi srfi-1)
|
||
(srfi srfi-26)
|
||
(system base target)
|
||
(system base compile))
|
||
|
||
(define (regular? file)
|
||
(not (member file '("." ".."))))
|
||
|
||
(define (process-entry entry output processed)
|
||
(if (file-is-directory? entry)
|
||
(let ((output (string-append output "/" (basename entry))))
|
||
(mkdir-p output)
|
||
(process-directory entry output processed))
|
||
(let* ((base (basename entry ".scm"))
|
||
(output (string-append output "/" base ".go")))
|
||
(format #t "[~2@a/~2@a] Compiling '~a'...~%"
|
||
(+ 1 processed (ungexp total))
|
||
(ungexp (* total 2))
|
||
entry)
|
||
|
||
(ungexp-splicing
|
||
(if target
|
||
(gexp ((with-target (ungexp target)
|
||
(lambda ()
|
||
(compile-file entry
|
||
#:output-file output
|
||
#:opts
|
||
%auto-compilation-options)))))
|
||
(gexp ((compile-file entry
|
||
#:output-file output
|
||
#:opts %auto-compilation-options)))))
|
||
|
||
(+ 1 processed))))
|
||
|
||
(define (process-directory directory output processed)
|
||
(let ((entries (map (cut string-append directory "/" <>)
|
||
(scandir directory regular?))))
|
||
(fold (cut process-entry <> output <>)
|
||
processed
|
||
entries)))
|
||
|
||
(define* (load-from-directory directory
|
||
#:optional (loaded 0))
|
||
"Load all the source files found in DIRECTORY."
|
||
;; XXX: This works around <https://bugs.gnu.org/15602>.
|
||
(let ((entries (map (cut string-append directory "/" <>)
|
||
(scandir directory regular?))))
|
||
(fold (lambda (file loaded)
|
||
(if (file-is-directory? file)
|
||
(load-from-directory file loaded)
|
||
(begin
|
||
(format #t "[~2@a/~2@a] Loading '~a'...~%"
|
||
(+ 1 loaded) (ungexp (* 2 total))
|
||
file)
|
||
(save-module-excursion
|
||
(lambda ()
|
||
(primitive-load file)))
|
||
(+ 1 loaded))))
|
||
loaded
|
||
entries)))
|
||
|
||
(setvbuf (current-output-port)
|
||
(cond-expand (guile-2.2 'line) (else _IOLBF)))
|
||
|
||
(define mkdir-p
|
||
;; Capture 'mkdir-p'.
|
||
(@ (guix build utils) mkdir-p))
|
||
|
||
;; Add EXTENSIONS to the search path.
|
||
(set! %load-path
|
||
(append (map (lambda (extension)
|
||
(string-append extension
|
||
"/share/guile/site/"
|
||
(effective-version)))
|
||
'((ungexp-native-splicing extensions)))
|
||
%load-path))
|
||
(set! %load-compiled-path
|
||
(append (map (lambda (extension)
|
||
(string-append extension "/lib/guile/"
|
||
(effective-version)
|
||
"/site-ccache"))
|
||
'((ungexp-native-splicing extensions)))
|
||
%load-compiled-path))
|
||
|
||
(set! %load-path (cons (ungexp modules) %load-path))
|
||
|
||
;; Above we loaded our own (guix build utils) but now we may need to
|
||
;; load a compile a different one. Thus, force a reload.
|
||
(let ((utils (string-append (ungexp modules)
|
||
"/guix/build/utils.scm")))
|
||
(when (file-exists? utils)
|
||
(load utils)))
|
||
|
||
(mkdir (ungexp output))
|
||
(chdir (ungexp modules))
|
||
|
||
(load-from-directory ".")
|
||
(process-directory "." (ungexp output) 0))))
|
||
|
||
;; TODO: Pass MODULES as an environment variable.
|
||
(gexp->derivation name build
|
||
#:system system
|
||
#:target target
|
||
#:guile-for-build guile
|
||
#:local-build? #t
|
||
#:env-vars
|
||
(case deprecation-warnings
|
||
((#f)
|
||
'(("GUILE_WARN_DEPRECATED" . "no")))
|
||
((detailed)
|
||
'(("GUILE_WARN_DEPRECATED" . "detailed")))
|
||
(else
|
||
'())))))
|
||
|
||
|
||
;;;
|
||
;;; Convenience procedures.
|
||
;;;
|
||
|
||
(define (default-guile)
|
||
;; Lazily resolve 'guile-3.0' (not 'guile-final' because this is for
|
||
;; programs returned by 'program-file' and we don't want to keep references
|
||
;; to several Guile packages). This module must not refer to (gnu …)
|
||
;; modules directly, to avoid circular dependencies, hence this hack.
|
||
(module-ref (resolve-interface '(gnu packages guile))
|
||
'guile-3.0))
|
||
|
||
(define* (load-path-expression modules #:optional (path %load-path)
|
||
#:key (extensions '()) system target
|
||
(guile (default-guile)))
|
||
"Return as a monadic value a gexp that sets '%load-path' and
|
||
'%load-compiled-path' to point to MODULES, a list of module names. MODULES
|
||
are searched for in PATH. Return #f when MODULES and EXTENSIONS are empty.
|
||
Assume MODULES are compiled with GUILE."
|
||
(if (and (null? modules) (null? extensions))
|
||
(with-monad %store-monad
|
||
(return #f))
|
||
(mlet* %store-monad ((guile (lower-object guile system #:target #f))
|
||
(compiled (compiled-modules modules
|
||
#:guile guile
|
||
#:extensions extensions
|
||
#:module-path path
|
||
#:system system
|
||
#:target target))
|
||
(modules (imported-modules modules
|
||
#:guile guile
|
||
#:module-path path
|
||
#:system system)))
|
||
(return
|
||
(gexp (eval-when (expand load eval)
|
||
;; Augment the load paths and delete duplicates. Do that
|
||
;; without loading (srfi srfi-1) or anything.
|
||
(let ((extensions '((ungexp-splicing extensions)))
|
||
(prepend (lambda (items lst)
|
||
;; This is O(N²) but N is typically small.
|
||
(let loop ((items items)
|
||
(lst lst))
|
||
(if (null? items)
|
||
lst
|
||
(loop (cdr items)
|
||
(cons (car items)
|
||
(delete (car items) lst))))))))
|
||
(set! %load-path
|
||
(prepend (cons (ungexp modules)
|
||
(map (lambda (extension)
|
||
(string-append extension
|
||
"/share/guile/site/"
|
||
(effective-version)))
|
||
extensions))
|
||
%load-path))
|
||
(set! %load-compiled-path
|
||
(prepend (cons (ungexp compiled)
|
||
(map (lambda (extension)
|
||
(string-append extension
|
||
"/lib/guile/"
|
||
(effective-version)
|
||
"/site-ccache"))
|
||
extensions))
|
||
%load-compiled-path)))))))))
|
||
|
||
(define* (gexp->script name exp
|
||
#:key (guile (default-guile))
|
||
(module-path %load-path)
|
||
(system (%current-system))
|
||
(target 'current))
|
||
"Return an executable script NAME that runs EXP using GUILE, with EXP's
|
||
imported modules in its search path. Look up EXP's modules in MODULE-PATH."
|
||
(mlet* %store-monad ((target (if (eq? target 'current)
|
||
(current-target-system)
|
||
(return target)))
|
||
(set-load-path
|
||
(load-path-expression (gexp-modules exp)
|
||
module-path
|
||
#:guile guile
|
||
#:extensions
|
||
(gexp-extensions exp)
|
||
#:system system
|
||
#:target target))
|
||
(guile-for-build
|
||
(lower-object guile system #:target #f)))
|
||
(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))
|
||
|
||
(ungexp-splicing
|
||
(if set-load-path
|
||
(gexp ((write '(ungexp set-load-path) port)))
|
||
(gexp ())))
|
||
|
||
(write '(ungexp exp) port)
|
||
(chmod port #o555))))
|
||
#:system system
|
||
#:target target
|
||
#:module-path module-path
|
||
#:guile-for-build guile-for-build
|
||
|
||
;; These derivations are not worth offloading or
|
||
;; substituting.
|
||
#:local-build? #t
|
||
#:substitutable? #f)))
|
||
|
||
(define* (gexp->file name exp #:key
|
||
(set-load-path? #t)
|
||
(module-path %load-path)
|
||
(splice? #f)
|
||
(system (%current-system))
|
||
(target 'current))
|
||
"Return a derivation that builds a file NAME containing EXP. When SPLICE?
|
||
is true, EXP is considered to be a list of expressions that will be spliced in
|
||
the resulting file.
|
||
|
||
When SET-LOAD-PATH? is true, emit code in the resulting file to set
|
||
'%load-path' and '%load-compiled-path' to honor EXP's imported modules.
|
||
Lookup EXP's modules in MODULE-PATH."
|
||
(define modules (gexp-modules exp))
|
||
(define extensions (gexp-extensions exp))
|
||
|
||
(mlet* %store-monad
|
||
((target (if (eq? target 'current)
|
||
(current-target-system)
|
||
(return target)))
|
||
(no-load-path? -> (or (not set-load-path?)
|
||
(and (null? modules)
|
||
(null? extensions))))
|
||
(set-load-path
|
||
(load-path-expression modules module-path
|
||
#:extensions extensions
|
||
#:system system
|
||
#:target target)))
|
||
(if no-load-path?
|
||
(gexp->derivation name
|
||
(gexp
|
||
(call-with-output-file (ungexp output)
|
||
(lambda (port)
|
||
(for-each
|
||
(lambda (exp)
|
||
(write exp port))
|
||
'(ungexp (if splice?
|
||
exp
|
||
(gexp ((ungexp exp)))))))))
|
||
#:local-build? #t
|
||
#:substitutable? #f
|
||
#:system system
|
||
#:target target)
|
||
(gexp->derivation name
|
||
(gexp
|
||
(call-with-output-file (ungexp output)
|
||
(lambda (port)
|
||
(write '(ungexp set-load-path) port)
|
||
(for-each
|
||
(lambda (exp)
|
||
(write exp port))
|
||
'(ungexp (if splice?
|
||
exp
|
||
(gexp ((ungexp exp)))))))))
|
||
#:module-path module-path
|
||
#:local-build? #t
|
||
#:substitutable? #f
|
||
#:system system
|
||
#:target target))))
|
||
|
||
(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
|
||
#:local-build? #t
|
||
#:substitutable? #f))
|
||
|
||
(define* (mixed-text-file name #:rest text)
|
||
"Return an object representing store file NAME containing TEXT. TEXT is a
|
||
sequence of strings and file-like objects, as in:
|
||
|
||
(mixed-text-file \"profile\"
|
||
\"export PATH=\" coreutils \"/bin:\" grep \"/bin\")
|
||
|
||
This is the declarative counterpart of 'text-file*'."
|
||
(define build
|
||
(gexp (call-with-output-file (ungexp output "out")
|
||
(lambda (port)
|
||
(set-port-encoding! port "UTF-8")
|
||
(display (string-append (ungexp-splicing text)) port)))))
|
||
|
||
(computed-file name build))
|
||
|
||
(define (file-union name files)
|
||
"Return a <computed-file> that builds a directory containing all of FILES.
|
||
Each item in FILES must be a two-element list where the first element is the
|
||
file name to use in the new directory, and the second element is a gexp
|
||
denoting the target file. Here's an example:
|
||
|
||
(file-union \"etc\"
|
||
`((\"hosts\" ,(plain-file \"hosts\"
|
||
\"127.0.0.1 localhost\"))
|
||
(\"bashrc\" ,(plain-file \"bashrc\"
|
||
\"alias ls='ls --color'\"))
|
||
(\"libvirt/qemu.conf\" ,(plain-file \"qemu.conf\" \"\"))))
|
||
|
||
This yields an 'etc' directory containing these two files."
|
||
(computed-file name
|
||
(with-imported-modules '((guix build utils))
|
||
(gexp
|
||
(begin
|
||
(use-modules (guix build utils))
|
||
|
||
(mkdir (ungexp output))
|
||
(chdir (ungexp output))
|
||
(ungexp-splicing
|
||
(map (match-lambda
|
||
((target source)
|
||
(gexp
|
||
(begin
|
||
;; Stat the source to abort early if it does
|
||
;; not exist.
|
||
(stat (ungexp source))
|
||
|
||
(mkdir-p (dirname (ungexp target)))
|
||
(symlink (ungexp source)
|
||
(ungexp target))))))
|
||
files)))))))
|
||
|
||
(define* (directory-union name things
|
||
#:key (copy? #f) (quiet? #f)
|
||
(resolve-collision 'warn-about-collision))
|
||
"Return a directory that is the union of THINGS, where THINGS is a list of
|
||
file-like objects denoting directories. For example:
|
||
|
||
(directory-union \"guile+emacs\" (list guile emacs))
|
||
|
||
yields a directory that is the union of the 'guile' and 'emacs' packages.
|
||
|
||
Call RESOLVE-COLLISION when several files collide, passing it the list of
|
||
colliding files. RESOLVE-COLLISION must return the chosen file or #f, in
|
||
which case the colliding entry is skipped altogether.
|
||
|
||
When HARD-LINKS? is true, create hard links instead of symlinks. When QUIET?
|
||
is true, the derivation will not print anything."
|
||
(define symlink
|
||
(if copy?
|
||
(gexp (lambda (old new)
|
||
(if (file-is-directory? old)
|
||
(symlink old new)
|
||
(copy-file old new))))
|
||
(gexp symlink)))
|
||
|
||
(define log-port
|
||
(if quiet?
|
||
(gexp (%make-void-port "w"))
|
||
(gexp (current-error-port))))
|
||
|
||
(match things
|
||
((one)
|
||
;; Only one thing; return it.
|
||
one)
|
||
(_
|
||
(computed-file name
|
||
(with-imported-modules '((guix build union))
|
||
(gexp (begin
|
||
(use-modules (guix build union)
|
||
(srfi srfi-1)) ;for 'first' and 'last'
|
||
|
||
(union-build (ungexp output)
|
||
'(ungexp things)
|
||
|
||
#:log-port (ungexp log-port)
|
||
#:symlink (ungexp symlink)
|
||
#:resolve-collision
|
||
(ungexp resolve-collision)))))))))
|
||
|
||
|
||
;;;
|
||
;;; 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
|