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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Julien Lepiller <julien@lepiller.eu>
;;; Copyright © 2020 Pierre Neidhardt <mail@ambrevar.xyz>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix build copy-build-system)
#:use-module ((guix build gnu-build-system) #:prefix gnu:)
#:use-module (guix build utils)
#:use-module (ice-9 match)
#:use-module (ice-9 ftw)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (%standard-phases
copy-build))
;; Commentary:
;;
;; System for building packages that don't require much compilation, mostly
;; only to copy files around.
;;
;; Code:
(define* (install #:key install-plan outputs #:allow-other-keys)
"Copy files from the \"source\" build input to the \"out\" output according to INSTALL-PLAN.
An install plan is a list of plans in the form:
(SOURCE TARGET [FILTERS])
In the above, FILTERS are optional.
- When SOURCE matches a file or directory without trailing slash, install it to
TARGET.
- If TARGET has a trailing slash, install SOURCE basename beneath TARGET.
- Otherwise install SOURCE as TARGET.
- When SOURCE is a directory with a trailing slash, or when FILTERS are used,
the trailing slash of TARGET is implied.
- Without FILTERS, install the full SOURCE _content_ to TARGET.
The paths relative to SOURCE are preserved within TARGET.
- With FILTERS among `#:include`, `#:include-regexp`, `#:exclude`,
`#:exclude-regexp`:
- With `#:include`, install only the paths which suffix exactly matches
one of the elements in the list.
- With `#:include-regexp`, install subpaths matching the regexps in the list.
- The `#:exclude*` FILTERS work similarly. Without `#:include*` flags,
install every subpath but the files matching the `#:exlude*` filters.
If both `#:include*` and `#:exclude*` are specified, the exclusion is done
on the inclusion list.
Examples:
- `(\"foo/bar\" \"share/my-app/\")`: Install bar to \"share/my-app/bar\".
- `(\"foo/bar\" \"share/my-app/baz\")`: Install bar to \"share/my-app/baz\".
- `(\"foo/\" \"share/my-app\")`: Install the content of foo inside \"share/my-app\",
e.g. install \"foo/sub/file\" to \"share/my-app/sub/file\".
- `(\"foo/\" \"share/my-app\" #:include (\"sub/file\"))`: Install only \"foo/sub/file\" to
\"share/my-app/sub/file\".
- `(\"foo/sub\" \"share/my-app\" #:include (\"file\"))`: Install \"foo/sub/file\" to
\"share/my-app/file\"."
(define (install-simple source target)
"Install SOURCE to TARGET.
TARGET must point to a store location.
SOURCE may be a file or a directory.
If a directory, the directory itself is installed, not its content.
if TARGET ends with a '/', the source is installed underneath."
(let ((target (if (string-suffix? "/" target)
(string-append target (basename source))
target)))
(mkdir-p (dirname target))
(copy-recursively source target)))
(define (install-file file target)
(let ((dest (string-append target
(if (string-suffix? "/" target)
(string-append "/" file)
file))))
(format (current-output-port) "`~a' -> `~a'~%" file dest)
(mkdir-p (dirname dest))
(let ((stat (lstat file)))
(case (stat:type stat)
((symlink)
(let ((target (readlink file)))
(symlink target dest)))
(else
(copy-file file dest))))))
(define* (make-file-predicate suffixes matches-regexp #:optional (default-value #t))
"Return a predicate that returns #t if its file argument matches the
SUFFIXES or the MATCHES-REGEXP. If neither SUFFIXES nor MATCHES-REGEXP is
given, then the predicate always returns DEFAULT-VALUE."
(if (or suffixes matches-regexp)
(let* ((suffixes (or suffixes '()))
(regexps (map make-regexp (or matches-regexp '())))
(predicates (append
(map (lambda (str)
(cut string-suffix? str <>))
suffixes)
(map (lambda (regexp)
(cut regexp-exec regexp <>))
regexps))))
(lambda (file)
(any (cut <> file) predicates)))
(const default-value)))
(define* (install-file-list source target #:key include exclude include-regexp exclude-regexp)
;; We must use switch current directory to source so that `find-files'
;; returns file paths relative to source.
(with-directory-excursion source
(let* ((exclusion-pred (negate (make-file-predicate exclude exclude-regexp #f)))
(inclusion-pred (make-file-predicate include include-regexp))
(file-list
(filter! exclusion-pred
(find-files "." (lambda (file _stat)
(inclusion-pred file))))))
(map (cut install-file <> (if (string-suffix? "/" target)
target
(string-append target "/")))
file-list))))
(define* (install source target #:key include exclude include-regexp exclude-regexp)
(set! target (string-append (assoc-ref outputs "out") "/" target))
(let ((filters? (or include exclude include-regexp exclude-regexp)))
(when (and (not (file-is-directory? source))
filters?)
(error "Cannot use filters when SOURCE is a file."))
(let ((multi-files-in-source?
(or (string-suffix? "/" source)
(and (file-is-directory? source)
filters?))))
(if multi-files-in-source?
(install-file-list source target
#:include include
#:exclude exclude
#:include-regexp include-regexp
#:exclude-regexp exclude-regexp)
(install-simple source target)))))
(for-each (lambda (plan) (apply install plan)) install-plan)
#t)
(define %standard-phases
;; Everything is as with the GNU Build System except for the `configure'
;; , `build', `check' and `install' phases.
(modify-phases gnu:%standard-phases
(delete 'bootstrap)
(delete 'configure)
(delete 'build)
(delete 'check)
(replace 'install install)))
(define* (copy-build #:key inputs (phases %standard-phases)
#:allow-other-keys #:rest args)
"Build the given package, applying all of PHASES in order."
(apply gnu:gnu-build #:inputs inputs #:phases phases args))
;;; copy-build-system.scm ends here
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