[bug#34831,04/25] build: Add rakudo-build-system.

* guix/build-system/rakudo.scm,
guix/build/rakudo-build-system.scm: New files.
* Makefile.am (MODULES): Add them.
* doc/guix.texi (Build System): Document it.
---
 Makefile.am                        |   3 +
 doc/guix.texi                      |  20 +++-
 guix/build-system/rakudo.scm       | 155 +++++++++++++++++++++++++++++
 guix/build/rakudo-build-system.scm | 140 ++++++++++++++++++++++++++
 4 files changed, 317 insertions(+), 1 deletion(-)
 create mode 100644 guix/build-system/rakudo.scm
 create mode 100644 guix/build/rakudo-build-system.scm

On Tue, Mar 12, 2019 at 10:19:53PM +0200, Efraim Flashner wrote:
> * guix/build-system/rakudo.scm,
> guix/build/rakudo-build-system.scm: New files.
> * Makefile.am (MODULES): Add them.
> * doc/guix.texi (Build System): Document it.
> ---
>  Makefile.am                        |   3 +
>  doc/guix.texi                      |  20 +++-
>  guix/build-system/rakudo.scm       | 155 +++++++++++++++++++++++++++++
>  guix/build/rakudo-build-system.scm | 140 ++++++++++++++++++++++++++
>  4 files changed, 317 insertions(+), 1 deletion(-)
>  create mode 100644 guix/build-system/rakudo.scm
>  create mode 100644 guix/build/rakudo-build-system.scm
> 
> diff --git a/Makefile.am b/Makefile.am
> index cf35770ba7..c3d2525af3 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -13,6 +13,7 @@
>  # Copyright © 2018 Julien Lepiller <julien@lepiller.eu>
>  # Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
>  # Copyright © 2018 Alex Vong <alexvong1995@gmail.com>
> +# Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
>  #
>  # This file is part of GNU Guix.
>  #
> @@ -124,6 +125,7 @@ MODULES =					\
>    guix/build-system/ocaml.scm			\
>    guix/build-system/waf.scm			\
>    guix/build-system/r.scm			\
> +  guix/build-system/rakudo.scm			\
>    guix/build-system/ruby.scm			\
>    guix/build-system/scons.scm			\
>    guix/build-system/texlive.scm			\
> @@ -164,6 +166,7 @@ MODULES =					\
>    guix/build/python-build-system.scm		\
>    guix/build/ocaml-build-system.scm		\
>    guix/build/r-build-system.scm			\
> +  guix/build/rakudo-build-system.scm		\
>    guix/build/ruby-build-system.scm		\
>    guix/build/scons-build-system.scm		\
>    guix/build/texlive-build-system.scm		\
> diff --git a/doc/guix.texi b/doc/guix.texi
> index 82cf2babb2..5937c86dad 100644
> --- a/doc/guix.texi
> +++ b/doc/guix.texi
> @@ -28,7 +28,7 @@ Copyright @copyright{} 2015, 2016, 2017 Leo Famulari@*
>  Copyright @copyright{} 2015, 2016, 2017, 2018, 2019 Ricardo Wurmus@*
>  Copyright @copyright{} 2016 Ben Woodcroft@*
>  Copyright @copyright{} 2016, 2017, 2018 Chris Marusich@*
> -Copyright @copyright{} 2016, 2017, 2018 Efraim Flashner@*
> +Copyright @copyright{} 2016, 2017, 2018, 2019 Efraim Flashner@*
>  Copyright @copyright{} 2016 John Darrington@*
>  Copyright @copyright{} 2016, 2017 Nils Gillmann@*
>  Copyright @copyright{} 2016, 2017, 2018, 2019 Jan Nieuwenhuizen@*
> @@ -5893,6 +5893,24 @@ are run after installation using the R function
>  @code{tools::testInstalledPackage}.
>  @end defvr
>  
> +@defvr {Scheme Variable} rakudo-build-system
> +This variable is exported by @code{(guix build-system rakudo)} It
> +implements the build procedure used by @uref{https://rakudo.org/,
> +Rakudo} for @uref{https://perl6.org/, Perl6} packages. It installs the
> +package to @code{/gnu/store/@dots{}/NAME-VERSION/share/perl6} and
> +installs the binaries, library files and the resources, as well as wrap
> +the files under the @code{bin/} directory.  Tests can be  skipped by
                                        extra space here ---^
> +passing @code{#f} to the @code{tests?} parameter.
> +
> +Which rakudo package is used can be specified with @code{rakudo}.
> +Which perl6-tap-harness package used for the tests can be specified with
> +@code{#:prove6} or removed by passing @code{#f} to the
> +@code{with-prove6?} parameter.
> +Which perl6-zef package used for tests and installing can be specified
> +with @code{#:zef} or removed by passing @code{#f} to the
> +@code{with-zef?} parameter.
> +@end defvr
> +
>  @defvr {Scheme Variable} texlive-build-system
>  This variable is exported by @code{(guix build-system texlive)}.  It is
>  used to build TeX packages in batch mode with a specified engine.  The
> diff --git a/guix/build-system/rakudo.scm b/guix/build-system/rakudo.scm
> new file mode 100644
> index 0000000000..fd469f0bb5
> --- /dev/null
> +++ b/guix/build-system/rakudo.scm
> @@ -0,0 +1,155 @@
> +;;; GNU Guix --- Functional package management for GNU
> +;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
> +;;;
> +;;; 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-system rakudo)
> +  #:use-module (guix store)
> +  #:use-module (guix utils)
> +  #:use-module (guix derivations)
> +  #:use-module (guix search-paths)
> +  #:use-module (guix build-system)
> +  #:use-module (guix build-system gnu)
> +  #:use-module (guix packages)
> +  #:use-module (ice-9 match)
> +  #:export (%rakudo-build-system-modules
> +            rakudo-build
> +            rakudo-build-system))
> +
> +;; Commentary:
> +;;
> +;; Standard build and install procedure for packages using the Rakudo
> +;; build system to be installed as system libraries.  This is
> +;; implemented as an extension of `gnu-build-system'.
> +;;
> +;; Code:
> +
> +(define %rakudo-build-system-modules
> +  ;; Build-side modules imported by default.
> +  `((guix build rakudo-build-system)
> +    ,@%gnu-build-system-modules))
> +
> +(define (default-rakudo)
> +  "Return the default Rakudo package."
> +
> +  ;; Do not use `@' to avoid introducing circular dependencies.
> +  (let ((module (resolve-interface '(gnu packages perl6))))
> +    (module-ref module 'rakudo)))
> +
> +(define (default-prove6)
> +  "Return the default perl6-tap-harness package for tests."
> +  (let ((module (resolve-interface '(gnu packages perl6))))
> +    (module-ref module 'perl6-tap-harness)))
> +
> +(define (default-zef)
> +  "Return the default perl6-zef package."
> +  (let ((module (resolve-interface '(gnu packages perl6))))
> +    (module-ref module 'perl6-zef)))
> +
> +(define* (lower name
> +                #:key source inputs native-inputs outputs
> +                system target
> +                (rakudo (default-rakudo))
> +                (prove6 (default-prove6))
> +                (zef (default-zef))
> +                (with-prove6? #t)
> +                (with-zef? #t)
> +                #:allow-other-keys
> +                #:rest arguments)
> +  "Return a bag for NAME."
> +  (define private-keywords
> +    '(#:source #:target #:rakudo #:prove6 #:zef #:inputs #:native-inputs))
> +
> +  (and (not target)                               ;XXX: no cross-compilation
> +       (bag
> +         (name name)
> +         (system system)
> +         (host-inputs `(,@(if source
> +                              `(("source" ,source))
> +                              '())
> +                        ,@inputs
> +
> +                        ;; Keep the standard inputs of 'gnu-build-system'.
> +                        ,@(standard-packages)))
> +         (build-inputs `(("rakudo" ,rakudo)
> +                         ,@(if with-prove6?
> +                               `(("perl6-tap-harness" ,prove6))
> +                               '())
> +                         ,@(if with-zef?
> +                               `(("perl6-zef" ,zef))
> +                               '())

perl6-zef depends on perl6-tap-harness, so this check could be wrapped
inside the 'with-prove6?' check

> +                         ,@native-inputs))
> +         (outputs outputs)
> +         (build rakudo-build)
> +         (arguments (strip-keyword-arguments private-keywords arguments)))))
> +
> +(define* (rakudo-build store name inputs
> +                       #:key
> +                       (search-paths '())
> +                       (tests? #t)
> +                       (phases '(@ (guix build rakudo-build-system)
> +                                   %standard-phases))
> +                       (outputs '("out"))
> +                       (system (%current-system))
> +                       (guile #f)
> +                       (with-zef? #t)
> +                       (with-prove6? #t)
> +                       (imported-modules %rakudo-build-system-modules)
> +                       (modules '((guix build rakudo-build-system)
> +                                  (guix build utils))))
> +  "Build SOURCE using PERL6, and with INPUTS."
> +  (define builder
> +    `(begin
> +       (use-modules ,@modules)
> +       (rakudo-build #:name ,name
> +                     #:source ,(match (assoc-ref inputs "source")
> +                                      (((? derivation? source))
> +                                       (derivation->output-path source))
> +                                      ((source)
> +                                       source)
> +                                      (source
> +                                        source))
> +                     #:search-paths ',(map search-path-specification->sexp
> +                                           search-paths)
> +                     #:phases ,phases
> +                     #:system ,system
> +                     #:tests? ,tests?
> +                     #:outputs %outputs
> +                     #:inputs %build-inputs)))
> +
> +  (define guile-for-build
> +    (match guile
> +      ((? package?)
> +       (package-derivation store guile system #:graft? #f))
> +      (#f                                         ; the default
> +       (let* ((distro (resolve-interface '(gnu packages commencement)))
> +              (guile  (module-ref distro 'guile-final)))
> +         (package-derivation store guile system #:graft? #f)))))
> +
> +  (build-expression->derivation store name builder
> +                                #:system system
> +                                #:inputs inputs
> +                                #:modules imported-modules
> +                                #:outputs outputs
> +                                #:guile-for-build guile-for-build))
> +
> +(define rakudo-build-system
> +  (build-system
> +    (name 'rakudo)
> +    (description "The standard Rakudo build system")
> +    (lower lower)))
> +
> +;;; rakudo.scm ends here
> diff --git a/guix/build/rakudo-build-system.scm b/guix/build/rakudo-build-system.scm
> new file mode 100644
> index 0000000000..bfdefa3c4e
> --- /dev/null
> +++ b/guix/build/rakudo-build-system.scm
> @@ -0,0 +1,140 @@
> +;;; GNU Guix --- Functional package management for GNU
> +;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
> +;;;
> +;;; 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 rakudo-build-system)
> +  #:use-module ((guix build gnu-build-system) #:prefix gnu:)
> +  #:use-module (guix build utils)
> +  #:use-module (ice-9 ftw)
> +  #:use-module (ice-9 match)
> +  #:use-module (srfi srfi-1)
> +  #:use-module (srfi srfi-26)
> +  #:export (%standard-phases
> +            rakudo-build))
> +
> +;; Commentary:
> +;;
> +;; Builder-side code of the standard Rakudo package build procedure.
> +;;
> +;; Code:
> +
> +(define* (check #:key tests? inputs with-prove6? #:allow-other-keys)
> +  (if (and tests? (assoc-ref inputs "perl6-tap-harness"))
> +  ;(if (and tests? with-prove6?)

This might work the same in practice, but it should be fixed IMO

> +      (invoke "prove6" "-I=lib" "t/")
> +      (format #t "test suite not run~%"))
> +  #t)
> +
> +(define* (install #:key inputs outputs with-zef? #:allow-other-keys)
> +  "Install a given Perl6 package."
> +  (let* ((out   (assoc-ref outputs "out"))
> +         (perl6 (string-append out "/share/perl6")))
> +    (if (assoc-ref inputs "perl6-zef")
> +    ;(if with-zef?

same as above

> +        (begin
> +          (let ((zef (string-append (assoc-ref inputs "perl6-zef")
> +                                    "/bin/zef")))
> +            (setenv "HOME" (getcwd))
> +            (mkdir-p perl6)
> +            (invoke zef "install" "--verbose" "."
> +                    ;; Don't install any of the following:
> +                    "--/depends" "--/build-depends" "--/test-depends"
> +                    (string-append "--install-to=" perl6))
> +            (delete-file (string-append perl6 "/repo.lock")))
> +          #t)
> +        (begin
> +          (let ((inst (string-append (assoc-ref inputs "rakudo")
> +                                     "/share/perl6/tools/install-dist.p6")))
> +            (setenv "RAKUDO_RERESOLVE_DEPENDENCIES" "0")
> +            (setenv "RAKUDO_MODULE_DEBUG" "1") ; be verbose while building
> +            (invoke inst (string-append "--to=" perl6) "--for=site"))))))
> +
> +(define* (install-libs #:key outputs #:allow-other-keys)
> +  (let ((out  (assoc-ref outputs "out"))
> +        (lock "lib/.precomp/.lock"))
> +    (when (file-exists? lock)
> +      (delete-file "lib/.precomp/.lock"))
> +    (copy-recursively "lib" (string-append out "/share/perl6/lib"))
> +    #t))
> +
> +(define* (install-bins #:key outputs #:allow-other-keys)
> +  (let ((out  (assoc-ref outputs "out")))
> +    (when (file-exists? "bin")
> +      (for-each (lambda (file)
> +                  (install-file file (string-append out "/bin"))
> +                  (chmod (string-append out "/" file) #o555))
> +                (find-files "bin" ".*")))
> +    #t))

Both 'bin' and 'sbin' are wrapped in the 'wrap phase (see below) but
only the bin directory is installed. IMO both should be done.

> +
> +(define* (install-resources #:key outputs #:allow-other-keys)
> +  (let ((out  (assoc-ref outputs "out")))
> +    (when (file-exists? "resources")
> +      (copy-recursively "resources"
> +                        (string-append out "/share/perl6/resources")))
> +  #t))
> +
> +(define* (wrap #:key inputs outputs #:allow-other-keys)
> +  (define (list-of-files dir)
> +    (map (cut string-append dir "/" <>)
> +         (or (scandir dir (lambda (f)
> +                            (let ((s (stat (string-append dir "/" f))))
> +                              (eq? 'regular (stat:type s)))))
> +             '())))
> +
> +  (define bindirs
> +    (append-map (match-lambda
> +                 ((_ . dir)
> +                  (list (string-append dir "/bin")
> +                        (string-append dir "/sbin"))))
> +                outputs))
> +
> +  (let* ((out  (assoc-ref outputs "out"))
> +         (var `("PERL6LIB" "," prefix
> +                ,(cons (string-append out "/share/perl6/lib,"
> +                                      out "/share/perl6/site/lib,"
> +                                      out "/share/perl6/vendor/lib")
> +                       (search-path-as-string->list
> +                        (or (getenv "PERL6LIB") "") #\,)))))
> +    (for-each (lambda (dir)
> +                (let ((files (list-of-files dir)))
> +                  (for-each (cut wrap-program <> var)
> +                            files)))
> +              bindirs)
> +    #t))
> +
> +(define %standard-phases
> +  ;; No need for 'bootstrap, 'configure or 'build.
> +  (modify-phases gnu:%standard-phases
> +    (delete 'bootstrap)
> +    (delete 'configure)
> +    (delete 'build)
> +    (replace 'check check)
> +    (replace 'install install)
> +    (add-before 'install 'install-lib-dir install-libs)
> +    (add-after 'install-lib-dir 'install-resources install-resources)
> +    (add-after 'install-resources 'install-binaries install-bins)
> +    ;; needs to be after 'install-binaries and all 'install phases
> +    (add-after 'install 'wrap wrap)))
> +
> +(define* (rakudo-build #:key inputs (phases %standard-phases)
> +                       #:allow-other-keys #:rest args)
> +  "Build the given Perl6 package, applying all of PHASES in order."
> +  (apply gnu:gnu-build
> +         #:inputs inputs #:phases phases
> +         args))
> +
> +;;; rakudo-build-system.scm ends here
> -- 
> 2.21.0
>

On Tue, Mar 12, 2019 at 10:19:53PM +0200, Efraim Flashner wrote:
> * guix/build-system/rakudo.scm,
> guix/build/rakudo-build-system.scm: New files.
> * Makefile.am (MODULES): Add them.
> * doc/guix.texi (Build System): Document it.
> ---
>  Makefile.am                        |   3 +
>  doc/guix.texi                      |  20 +++-
>  guix/build-system/rakudo.scm       | 155 +++++++++++++++++++++++++++++
>  guix/build/rakudo-build-system.scm | 140 ++++++++++++++++++++++++++
>  4 files changed, 317 insertions(+), 1 deletion(-)
>  create mode 100644 guix/build-system/rakudo.scm
>  create mode 100644 guix/build/rakudo-build-system.scm
> 
> diff --git a/Makefile.am b/Makefile.am
> index cf35770ba7..c3d2525af3 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -13,6 +13,7 @@
>  # Copyright © 2018 Julien Lepiller <julien@lepiller.eu>
>  # Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
>  # Copyright © 2018 Alex Vong <alexvong1995@gmail.com>
> +# Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
>  #
>  # This file is part of GNU Guix.
>  #
> @@ -124,6 +125,7 @@ MODULES =					\
>    guix/build-system/ocaml.scm			\
>    guix/build-system/waf.scm			\
>    guix/build-system/r.scm			\
> +  guix/build-system/rakudo.scm			\
>    guix/build-system/ruby.scm			\
>    guix/build-system/scons.scm			\
>    guix/build-system/texlive.scm			\
> @@ -164,6 +166,7 @@ MODULES =					\
>    guix/build/python-build-system.scm		\
>    guix/build/ocaml-build-system.scm		\
>    guix/build/r-build-system.scm			\
> +  guix/build/rakudo-build-system.scm		\
>    guix/build/ruby-build-system.scm		\
>    guix/build/scons-build-system.scm		\
>    guix/build/texlive-build-system.scm		\
> diff --git a/doc/guix.texi b/doc/guix.texi
> index 82cf2babb2..5937c86dad 100644
> --- a/doc/guix.texi
> +++ b/doc/guix.texi
> @@ -28,7 +28,7 @@ Copyright @copyright{} 2015, 2016, 2017 Leo Famulari@*
>  Copyright @copyright{} 2015, 2016, 2017, 2018, 2019 Ricardo Wurmus@*
>  Copyright @copyright{} 2016 Ben Woodcroft@*
>  Copyright @copyright{} 2016, 2017, 2018 Chris Marusich@*
> -Copyright @copyright{} 2016, 2017, 2018 Efraim Flashner@*
> +Copyright @copyright{} 2016, 2017, 2018, 2019 Efraim Flashner@*
>  Copyright @copyright{} 2016 John Darrington@*
>  Copyright @copyright{} 2016, 2017 Nils Gillmann@*
>  Copyright @copyright{} 2016, 2017, 2018, 2019 Jan Nieuwenhuizen@*
> @@ -5893,6 +5893,24 @@ are run after installation using the R function
>  @code{tools::testInstalledPackage}.
>  @end defvr
>  
> +@defvr {Scheme Variable} rakudo-build-system
> +This variable is exported by @code{(guix build-system rakudo)} It
> +implements the build procedure used by @uref{https://rakudo.org/,
> +Rakudo} for @uref{https://perl6.org/, Perl6} packages. It installs the
> +package to @code{/gnu/store/@dots{}/NAME-VERSION/share/perl6} and
> +installs the binaries, library files and the resources, as well as wrap
> +the files under the @code{bin/} directory.  Tests can be  skipped by
> +passing @code{#f} to the @code{tests?} parameter.
> +
> +Which rakudo package is used can be specified with @code{rakudo}.
> +Which perl6-tap-harness package used for the tests can be specified with
> +@code{#:prove6} or removed by passing @code{#f} to the
> +@code{with-prove6?} parameter.
> +Which perl6-zef package used for tests and installing can be specified
> +with @code{#:zef} or removed by passing @code{#f} to the
> +@code{with-zef?} parameter.
> +@end defvr
> +
>  @defvr {Scheme Variable} texlive-build-system
>  This variable is exported by @code{(guix build-system texlive)}.  It is
>  used to build TeX packages in batch mode with a specified engine.  The
> diff --git a/guix/build-system/rakudo.scm b/guix/build-system/rakudo.scm
> new file mode 100644
> index 0000000000..fd469f0bb5
> --- /dev/null
> +++ b/guix/build-system/rakudo.scm
> @@ -0,0 +1,155 @@
> +;;; GNU Guix --- Functional package management for GNU
> +;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
> +;;;
> +;;; 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-system rakudo)
> +  #:use-module (guix store)
> +  #:use-module (guix utils)
> +  #:use-module (guix derivations)
> +  #:use-module (guix search-paths)
> +  #:use-module (guix build-system)
> +  #:use-module (guix build-system gnu)
> +  #:use-module (guix packages)
> +  #:use-module (ice-9 match)
> +  #:export (%rakudo-build-system-modules
> +            rakudo-build
> +            rakudo-build-system))
> +
> +;; Commentary:
> +;;
> +;; Standard build and install procedure for packages using the Rakudo
> +;; build system to be installed as system libraries.  This is
> +;; implemented as an extension of `gnu-build-system'.
> +;;
> +;; Code:
> +
> +(define %rakudo-build-system-modules
> +  ;; Build-side modules imported by default.
> +  `((guix build rakudo-build-system)
> +    ,@%gnu-build-system-modules))
> +
> +(define (default-rakudo)
> +  "Return the default Rakudo package."
> +
> +  ;; Do not use `@' to avoid introducing circular dependencies.
> +  (let ((module (resolve-interface '(gnu packages perl6))))
> +    (module-ref module 'rakudo)))
> +
> +(define (default-prove6)
> +  "Return the default perl6-tap-harness package for tests."
> +  (let ((module (resolve-interface '(gnu packages perl6))))
> +    (module-ref module 'perl6-tap-harness)))
> +
> +(define (default-zef)
> +  "Return the default perl6-zef package."
> +  (let ((module (resolve-interface '(gnu packages perl6))))
> +    (module-ref module 'perl6-zef)))
> +
> +(define* (lower name
> +                #:key source inputs native-inputs outputs
> +                system target
> +                (rakudo (default-rakudo))
> +                (prove6 (default-prove6))
> +                (zef (default-zef))
> +                (with-prove6? #t)
> +                (with-zef? #t)
> +                #:allow-other-keys
> +                #:rest arguments)
> +  "Return a bag for NAME."
> +  (define private-keywords
> +    '(#:source #:target #:rakudo #:prove6 #:zef #:inputs #:native-inputs))
> +
> +  (and (not target)                               ;XXX: no cross-compilation
> +       (bag
> +         (name name)
> +         (system system)
> +         (host-inputs `(,@(if source
> +                              `(("source" ,source))
> +                              '())
> +                        ,@inputs
> +
> +                        ;; Keep the standard inputs of 'gnu-build-system'.
> +                        ,@(standard-packages)))
> +         (build-inputs `(("rakudo" ,rakudo)
> +                         ,@(if with-prove6?
> +                               `(("perl6-tap-harness" ,prove6))
> +                               '())
> +                         ,@(if with-zef?
> +                               `(("perl6-zef" ,zef))
> +                               '())
> +                         ,@native-inputs))
> +         (outputs outputs)
> +         (build rakudo-build)
> +         (arguments (strip-keyword-arguments private-keywords arguments)))))
> +
> +(define* (rakudo-build store name inputs
> +                       #:key
> +                       (search-paths '())
> +                       (tests? #t)
> +                       (phases '(@ (guix build rakudo-build-system)
> +                                   %standard-phases))
> +                       (outputs '("out"))
> +                       (system (%current-system))
> +                       (guile #f)
> +                       (with-zef? #t)
> +                       (with-prove6? #t)
> +                       (imported-modules %rakudo-build-system-modules)
> +                       (modules '((guix build rakudo-build-system)
> +                                  (guix build utils))))
> +  "Build SOURCE using PERL6, and with INPUTS."
> +  (define builder
> +    `(begin
> +       (use-modules ,@modules)
> +       (rakudo-build #:name ,name
> +                     #:source ,(match (assoc-ref inputs "source")
> +                                      (((? derivation? source))
> +                                       (derivation->output-path source))
> +                                      ((source)
> +                                       source)
> +                                      (source
> +                                        source))
> +                     #:search-paths ',(map search-path-specification->sexp
> +                                           search-paths)
> +                     #:phases ,phases
> +                     #:system ,system
> +                     #:tests? ,tests?
> +                     #:outputs %outputs
> +                     #:inputs %build-inputs)))
> +
> +  (define guile-for-build
> +    (match guile
> +      ((? package?)
> +       (package-derivation store guile system #:graft? #f))
> +      (#f                                         ; the default
> +       (let* ((distro (resolve-interface '(gnu packages commencement)))
> +              (guile  (module-ref distro 'guile-final)))
> +         (package-derivation store guile system #:graft? #f)))))
> +
> +  (build-expression->derivation store name builder
> +                                #:system system
> +                                #:inputs inputs
> +                                #:modules imported-modules
> +                                #:outputs outputs
> +                                #:guile-for-build guile-for-build))
> +
> +(define rakudo-build-system
> +  (build-system
> +    (name 'rakudo)
> +    (description "The standard Rakudo build system")
> +    (lower lower)))
> +
> +;;; rakudo.scm ends here
> diff --git a/guix/build/rakudo-build-system.scm b/guix/build/rakudo-build-system.scm
> new file mode 100644
> index 0000000000..bfdefa3c4e
> --- /dev/null
> +++ b/guix/build/rakudo-build-system.scm
> @@ -0,0 +1,140 @@
> +;;; GNU Guix --- Functional package management for GNU
> +;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
> +;;;
> +;;; 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 rakudo-build-system)
> +  #:use-module ((guix build gnu-build-system) #:prefix gnu:)
> +  #:use-module (guix build utils)
> +  #:use-module (ice-9 ftw)
> +  #:use-module (ice-9 match)
> +  #:use-module (srfi srfi-1)
> +  #:use-module (srfi srfi-26)
> +  #:export (%standard-phases
> +            rakudo-build))
> +
> +;; Commentary:
> +;;
> +;; Builder-side code of the standard Rakudo package build procedure.
> +;;
> +;; Code:
> +
> +(define* (check #:key tests? inputs with-prove6? #:allow-other-keys)
> +  (if (and tests? (assoc-ref inputs "perl6-tap-harness"))
> +  ;(if (and tests? with-prove6?)
> +      (invoke "prove6" "-I=lib" "t/")

Can we have a default set of tests even if perl6-tap-harness isn't
available?

> +      (format #t "test suite not run~%"))
> +  #t)
> +
> +(define* (install #:key inputs outputs with-zef? #:allow-other-keys)
> +  "Install a given Perl6 package."
> +  (let* ((out   (assoc-ref outputs "out"))
> +         (perl6 (string-append out "/share/perl6")))
> +    (if (assoc-ref inputs "perl6-zef")
> +    ;(if with-zef?
> +        (begin
> +          (let ((zef (string-append (assoc-ref inputs "perl6-zef")
> +                                    "/bin/zef")))
> +            (setenv "HOME" (getcwd))
> +            (mkdir-p perl6)
> +            (invoke zef "install" "--verbose" "."
> +                    ;; Don't install any of the following:
> +                    "--/depends" "--/build-depends" "--/test-depends"
> +                    (string-append "--install-to=" perl6))
> +            (delete-file (string-append perl6 "/repo.lock")))
> +          #t)
> +        (begin
> +          (let ((inst (string-append (assoc-ref inputs "rakudo")
> +                                     "/share/perl6/tools/install-dist.p6")))
> +            (setenv "RAKUDO_RERESOLVE_DEPENDENCIES" "0")
> +            (setenv "RAKUDO_MODULE_DEBUG" "1") ; be verbose while building
> +            (invoke inst (string-append "--to=" perl6) "--for=site"))))))
> +
> +(define* (install-libs #:key outputs #:allow-other-keys)
> +  (let ((out  (assoc-ref outputs "out"))
> +        (lock "lib/.precomp/.lock"))
> +    (when (file-exists? lock)
> +      (delete-file "lib/.precomp/.lock"))
> +    (copy-recursively "lib" (string-append out "/share/perl6/lib"))
> +    #t))
> +
> +(define* (install-bins #:key outputs #:allow-other-keys)
> +  (let ((out  (assoc-ref outputs "out")))
> +    (when (file-exists? "bin")
> +      (for-each (lambda (file)
> +                  (install-file file (string-append out "/bin"))
> +                  (chmod (string-append out "/" file) #o555))
> +                (find-files "bin" ".*")))
> +    #t))
> +
> +(define* (install-resources #:key outputs #:allow-other-keys)
> +  (let ((out  (assoc-ref outputs "out")))
> +    (when (file-exists? "resources")
> +      (copy-recursively "resources"
> +                        (string-append out "/share/perl6/resources")))
> +  #t))
> +
> +(define* (wrap #:key inputs outputs #:allow-other-keys)
> +  (define (list-of-files dir)
> +    (map (cut string-append dir "/" <>)
> +         (or (scandir dir (lambda (f)
> +                            (let ((s (stat (string-append dir "/" f))))
> +                              (eq? 'regular (stat:type s)))))
> +             '())))
> +
> +  (define bindirs
> +    (append-map (match-lambda
> +                 ((_ . dir)
> +                  (list (string-append dir "/bin")
> +                        (string-append dir "/sbin"))))
> +                outputs))
> +
> +  (let* ((out  (assoc-ref outputs "out"))
> +         (var `("PERL6LIB" "," prefix
> +                ,(cons (string-append out "/share/perl6/lib,"
> +                                      out "/share/perl6/site/lib,"
> +                                      out "/share/perl6/vendor/lib")
> +                       (search-path-as-string->list
> +                        (or (getenv "PERL6LIB") "") #\,)))))
> +    (for-each (lambda (dir)
> +                (let ((files (list-of-files dir)))
> +                  (for-each (cut wrap-program <> var)
> +                            files)))
> +              bindirs)
> +    #t))
> +
> +(define %standard-phases
> +  ;; No need for 'bootstrap, 'configure or 'build.
> +  (modify-phases gnu:%standard-phases
> +    (delete 'bootstrap)
> +    (delete 'configure)
> +    (delete 'build)
> +    (replace 'check check)
> +    (replace 'install install)
> +    (add-before 'install 'install-lib-dir install-libs)
> +    (add-after 'install-lib-dir 'install-resources install-resources)
> +    (add-after 'install-resources 'install-binaries install-bins)
> +    ;; needs to be after 'install-binaries and all 'install phases
> +    (add-after 'install 'wrap wrap)))
> +
> +(define* (rakudo-build #:key inputs (phases %standard-phases)
> +                       #:allow-other-keys #:rest args)
> +  "Build the given Perl6 package, applying all of PHASES in order."
> +  (apply gnu:gnu-build
> +         #:inputs inputs #:phases phases
> +         args))
> +
> +;;; rakudo-build-system.scm ends here
> -- 
> 2.21.0
>