Move the "binary" build system from the Gaming Channels to Nonguix.

* nonguix/build-system/binary.scm: New file.
* nonguix/build/binary-build-system.scm: New file.
* nonguix/build/utils.scm: New file.
* nonguix/utils.scm: New file.

2 files changed, 319 insertions, 0 deletions

diff --git a/nonguix/build/binary-build-system.scm b/nonguix/build/binary-build-system.scm
new file mode 100644
index 0000000..372e16b
--- /dev/null
+++ b/nonguix/build/binary-build-system.scm
@@ -0,0 +1,134 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Julien Lepiller <julien@lepiller.eu>
+;;;
+;;; This file is not 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 (nonguix build binary-build-system)
+  #:use-module ((guix build gnu-build-system) #:prefix gnu:)
+  #:use-module (nonguix build utils)
+  #:use-module (guix build utils)
+  #:use-module (ice-9 match)
+  #:export (%standard-phases
+            binary-build))
+
+;; Commentary:
+;;
+;; Builder-side code of the standard binary build procedure.
+;;
+;; 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 made of three elements:
+
+- A source path which is a file or directory from the \"source\" build input.
+- Patterns of the files to copy (only useful if the source path is a directory).
+- The target destination.
+
+If the target ends with a slash, it represents the target directory.  If not, it
+represent the target full path, which only makes sense for single files."
+  (define (install-file file target)
+    (let ((target (string-append (assoc-ref outputs "out")
+                                 "/" target
+                                 (if (string-suffix? "/" target)
+                                     (string-append "/" file)
+                                     ""))))
+      (mkdir-p (dirname target))
+      (copy-file file target)))
+
+  (define (install-file-pattern pattern target)
+    (for-each
+      (lambda (file)
+        (install-file file target))
+      (find-files "." pattern)))
+
+  (define (install plan)
+    (match plan
+      ((file-or-directory files target)
+       (if (file-is-directory? file-or-directory)
+           (with-directory-excursion file-or-directory
+             (for-each
+              (lambda (pattern)
+                (install-file-pattern pattern target))
+              files))
+           (install-file file-or-directory target)))))
+
+  (for-each install install-plan)
+  #t)
+
+(define* (patchelf #:key inputs outputs patchelf-plan #:allow-other-keys)
+  "Set the interpreter and the RPATH of files as per the PATCHELF-PLAN.
+
+The PATCHELF-PLAN elements are lists of:
+
+- The file to patch.
+- The inputs (as strings) to include in the rpath, e.g. \"mesa\".
+
+Both executables and dynamic libraries are accepted.
+The inputs are optional when the file is an executable."
+  (define (binary-patch binary interpreter runpath)
+    (unless (string-contains binary ".so")
+      (invoke "patchelf" "--set-interpreter" interpreter binary))
+    (when runpath
+      (let ((rpath (string-join
+                    (map
+                     (lambda (input-or-output)
+                       (cond
+                        ((assoc-ref outputs input-or-output)
+                         (string-append (assoc-ref outputs input-or-output) "/lib"))
+                        ((assoc-ref inputs input-or-output)
+                         (string-append (assoc-ref inputs input-or-output) "/lib"))
+                        (else (error (format #f "`~a' not found among the inputs nor the outputs." input-or-output)))))
+                     runpath)
+                    ":")))
+        (invoke "patchelf" "--set-rpath" rpath binary)))
+    #t)
+  (let ((interpreter (car (find-files (assoc-ref inputs "libc") "ld-linux.*\\.so")))
+        (interpreter32 (car (find-files (assoc-ref inputs "libc32") "ld-linux.*\\.so"))))
+    (for-each
+      (lambda (plan)
+        (match plan
+          ((binary runpath)
+           (binary-patch binary (if (64-bit? binary)
+                                    interpreter
+                                    interpreter32)
+                         runpath))
+          ((binary)
+           (binary-patch binary (if (64-bit? binary)
+                                    interpreter
+                                    interpreter32)
+                         #f))))
+      patchelf-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)
+    (add-before 'install 'patchelf patchelf)
+    (replace 'install install)))
+
+(define* (binary-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))
+
+;;; binary-build-system.scm ends here
diff --git a/nonguix/build/utils.scm b/nonguix/build/utils.scm
new file mode 100644
index 0000000..b520769
--- /dev/null
+++ b/nonguix/build/utils.scm
@@ -0,0 +1,185 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
+;;;
+;;; This file is not 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 (nonguix build utils)
+  #:use-module (ice-9 match)
+  #:use-module (ice-9 binary-ports)
+  #:use-module (guix build utils)
+  #:export (64-bit?
+            make-desktop-entry-file
+            make-wrapper))
+
+(define (64-bit? file)
+  "Return true if ELF file is in 64-bit format, false otherwise.
+See https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header."
+  (with-input-from-file file
+    (lambda ()
+      (= 2
+         (array-ref (get-bytevector-n (current-input-port) 5) 4)))
+    #:binary #t))
+
+(define* (make-desktop-entry-file destination #:key
+                                  (type "Application") ; One of "Application", "Link" or "Directory".
+                                  (version "1.1")
+                                  name
+                                  (generic-name name)
+                                  (no-display #f)
+                                  comment
+                                  icon
+                                  (hidden #f)
+                                  only-show-in
+                                  not-show-in
+                                  (d-bus-activatable #f)
+                                  try-exec
+                                  exec
+                                  path
+                                  (terminal #f)
+                                  actions
+                                  mime-type
+                                  (categories "Application")
+                                  implements
+                                  keywords
+                                  (startup-notify #t)
+                                  startup-w-m-class
+                                  #:rest all-args)
+  "Create a desktop entry file at DESTINATION.
+You must specify NAME.
+
+Values can be booleans, numbers, strings or list of strings.
+
+Additionally, locales can be specified with an alist where the key is the
+locale.  The #f key specifies the default.  Example:
+
+  #:name '((#f \"I love Guix\") (\"fr\" \"J'aime Guix\"))
+
+produces
+
+  Name=I love Guix
+  Name[fr]=J'aime Guix
+
+For a complete description of the format, see the specifications at
+https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html."
+  (define (escape-semicolon s)
+    (string-join (string-split s #\;) "\\;"))
+  (define* (parse key value #:optional locale)
+    (set! value (match value
+                  (#t "true")
+                  (#f "false")
+                  ((?  number? n) n)
+                  ((?  string? s) (escape-semicolon s))
+                  ((?  list? value)
+                   (catch 'wrong-type-arg
+                     (lambda () (string-join (map escape-semicolon value) ";"))
+                     (lambda args (error "List arguments can only contain strings: ~a" args))))
+                  (_ (error "Value must be a boolean, number, string or list of strings"))))
+    (format #t "~a=~a~%"
+            (if locale
+                (format #f "~a[~a]" key locale)
+                key)
+            value))
+
+  (define key-error-message "This procedure only takes key arguments beside DESTINATION")
+
+  (unless name
+    (error "Missing NAME key argument"))
+  (unless (member #:type all-args)
+    (set! all-args (append (list #:type type) all-args)))
+  (mkdir-p (dirname destination))
+
+  (with-output-to-file destination
+    (lambda ()
+      (format #t "[Desktop Entry]~%")
+      (let loop ((args all-args))
+        (match args
+          (() #t)
+          ((_) (error key-error-message))
+          ((key value . ...)
+           (unless (keyword? key)
+             (error key-error-message))
+           (set! key
+                 (string-join (map string-titlecase
+                                   (string-split (symbol->string
+                                                  (keyword->symbol key))
+                                                 #\-))
+                              ""))
+           (match value
+             (((_ . _) . _)
+              (for-each (lambda (locale-subvalue)
+                          (parse key
+                                 (if (and (list? (cdr locale-subvalue))
+                                          (= 1 (length (cdr locale-subvalue))))
+                                     ;; Support both proper and improper lists for convenience.
+                                     (cadr locale-subvalue)
+                                     (cdr locale-subvalue))
+                                 (car locale-subvalue)))
+                        value))
+             (_
+              (parse key value)))
+           (loop (cddr args))))))))
+
+(define* (make-wrapper wrapper real-file #:rest vars)
+  "Like `wrap-program' but create WRAPPER around REAL-FILE.
+The wrapper automatically changes directory to that of REAL-FILE.
+
+Example:
+
+  (make-wrapper \"bin/foo\" \"sub-dir/original-foo\"
+                '(\"PATH\" \":\" = (\"/gnu/.../bar/bin\"))
+                '(\"CERT_PATH\" suffix (\"/gnu/.../baz/certs\"
+                                        \"/qux/certs\")))
+
+will create 'bin/foo' with the following
+contents:
+
+  #!location/of/bin/bash
+  export PATH=\"/gnu/.../bar/bin\"
+  export CERT_PATH=\"$CERT_PATH${CERT_PATH:+:}/gnu/.../baz/certs:/qux/certs\"
+  cd sub-dir
+  exec -a $0 sub-dir/original-foo \"$@\"."
+  (define (export-variable lst)
+    ;; Return a string that exports an environment variable.
+    (match lst
+      ((var sep '= rest)
+       (format #f "export ~a=\"~a\""
+               var (string-join rest sep)))
+      ((var sep 'prefix rest)
+       (format #f "export ~a=\"~a${~a:+~a}$~a\""
+               var (string-join rest sep) var sep var))
+      ((var sep 'suffix rest)
+       (format #f "export ~a=\"$~a${~a+~a}~a\""
+               var var var sep (string-join rest sep)))
+      ((var '= rest)
+       (format #f "export ~a=\"~a\""
+               var (string-join rest ":")))
+      ((var 'prefix rest)
+       (format #f "export ~a=\"~a${~a:+:}$~a\""
+               var (string-join rest ":") var var))
+      ((var 'suffix rest)
+       (format #f "export ~a=\"$~a${~a:+:}~a\""
+               var var var (string-join rest ":")))))
+
+  (mkdir-p (dirname wrapper))
+  (call-with-output-file wrapper
+    (lambda (port)
+      (format port
+              "#!~a~%~a~%cd \"~a\"~%exec -a \"$0\" \"~a\" \"$@\"~%"
+              (which "bash")
+              (string-join (map export-variable vars) "\n")
+              (dirname real-file)
+              (canonicalize-path real-file))))
+  (chmod wrapper #o755))