From 9dab75879140d0f6ca0a25e1f2e3c5b912090d7c Mon Sep 17 00:00:00 2001
From: Nicolas Graves <ngraves@ngraves.fr>
Date: Thu, 2 Nov 2023 16:16:50 +0100
Subject: build-system: Add ‘composer-build-system’.
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* guix/build-system/composer.scm: New file.
* guix/build/composer-build-system.scm: New file.
* gnu/packages/aux-files/findclass.php: New file.
* Makefile.am: Add them.
* doc/guix.texi (Build Systems): Document it.

Co-authored-by: Julien Lepiller <julien@lepiller.eu>
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Change-Id: Ie6a05b42ff04d3ad774a0a20278a77e4820bb8f6
---
 guix/build/composer-build-system.scm | 301 +++++++++++++++++++++++++++++++++++
 1 file changed, 301 insertions(+)
 create mode 100644 guix/build/composer-build-system.scm

(limited to 'guix/build')

diff --git a/guix/build/composer-build-system.scm b/guix/build/composer-build-system.scm
new file mode 100644
index 0000000000..8896384e0a
--- /dev/null
+++ b/guix/build/composer-build-system.scm
@@ -0,0 +1,301 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 Julien Lepiller <julien@lepiller.eu>
+;;; Copyright © 2023 Nicolas Graves <ngraves@ngraves.fr>
+;;;
+;;; 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 composer-build-system)
+  #:use-module ((guix build gnu-build-system) #:prefix gnu:)
+  #:use-module (guix build utils)
+  #:use-module (ice-9 match)
+  #:use-module (json)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:export (%standard-phases
+            composer-build))
+
+;; Commentary:
+;;
+;; Builder-side code of the standard composer build procedure.
+;;
+;; Code:
+
+(define (json->require dict)
+  (if dict
+      (let loop ((result '()) (require dict))
+        (match require
+          (() result)
+          ((((? (cut string-contains <> "/") name) . _)
+             require ...)
+           (loop (cons name result) require))
+          ((_ require ...) (loop result require))
+          (_ result)))
+      '()))
+
+(define (if-specified-to-list fn)
+  (match-lambda
+    ((? unspecified?) '())
+    (arg (fn arg))
+    (_ '())))
+
+(define-json-mapping <composer-autoload> make-composer-autoload
+  composer-autoload?
+  json->composer-autoload
+  (psr-4 composer-autoload-psr-4 "psr-4"
+         (match-lambda
+           ((? unspecified?) '())
+           ((? (lambda (al)
+                 (and (list? al) (pair? (car al)) (vector? (cdar al)))) al)
+            (append-map
+             (lambda (vect-el)
+               (list (cons (caar al) vect-el)))
+             (vector->list (cdar al))))
+           ((? list? l)                  l)
+           (_                           '())))
+  (psr-0 composer-autoload-psr-0 "psr-0" (if-specified-to-list identity))
+  (classmap composer-autoload-classmap "classmap"
+            (if-specified-to-list vector->list))
+  (files composer-autoload-files "files"
+         (if-specified-to-list vector->list)))
+
+(define-json-mapping <composer-package> make-composer-package composer-package?
+  json->composer-package
+  (name         composer-package-name)
+  (autoload     composer-package-autoload "autoload"
+                (if-specified-to-list json->composer-autoload))
+  (autoload-dev composer-package-autoload-dev "autoload-dev"
+                (if-specified-to-list json->composer-autoload))
+  (require      composer-package-require "require" json->require)
+  (dev-require  composer-package-dev-require "require-dev" json->require)
+  (scripts      composer-package-scripts "scripts"
+                (if-specified-to-list identity))
+  (binaries     composer-package-binaries "bin"
+                (if-specified-to-list vector->list)))
+
+(define* (read-package-data #:key (filename "composer.json"))
+  (call-with-input-file filename
+    (lambda (port)
+      (json->composer-package (json->scm port)))))
+
+(define* (create-test-autoload #:key composer-file inputs outputs tests?
+                               #:allow-other-keys)
+  "Create the autoload.php file for tests.  This is a standalone phase so that
+the autoload.php file can be edited before the check phase."
+  (when tests?
+    (mkdir-p "vendor")
+    (create-autoload (string-append (getcwd) "/vendor") composer-file
+                     inputs #:dev-dependencies? #t)))
+
+(define (find-bin script inputs)
+  (search-input-file inputs
+                     (string-append
+                      "bin/"
+                      (string-drop script (string-length "vendor/bin/")))))
+
+(define* (check #:key composer-file inputs
+                tests? test-target test-flags #:allow-other-keys)
+  "Test the given package.
+Please note that none of the PHP packages at the time of the rewrite of the
+build-system did use the test-script field.  This means that the @code{match
+test-script} part is not tested on a real example and relies on the original
+implementation."
+  (if tests?
+      (let* ((package-data (read-package-data #:filename composer-file))
+             (scripts (composer-package-scripts package-data))
+             (test-script (assoc-ref scripts test-target)))
+        (match test-script
+          ((? string? bin)
+           (let ((command (find-bin bin inputs)))
+             (unless (zero? (apply system command test-flags))
+               (throw 'failed-command command))))
+          (('@ (? string? bins) ...)
+           (for-each
+            (lambda (c)
+              (let ((command (find-bin c inputs)))
+                (unless (zero? (apply system command test-flags))
+                  (throw 'failed-command command))))
+            bins))
+          (_ (if (file-exists? "phpunit.xml.dist")
+                 (apply invoke
+                        (with-exception-handler
+                            (lambda (exn)
+                              (if (search-error? exn)
+                                  (error "\
+Missing php-phpunit-phpunit native input.~%")
+                                  (raise exn)))
+                          (lambda ()
+                            (search-input-file (or inputs '()) "bin/phpunit")))
+                        test-flags))
+             (format #t "No test suite found.~%"))))
+      (format #t "Test suite not run.~%")))
+
+(define* (create-autoload vendor composer-file inputs #:key dev-dependencies?)
+  "creates an autoload.php file that sets up the class locations for this package,
+so it can be autoloaded by PHP when the package classes are required."
+  (with-output-to-file (string-append vendor "/autoload.php")
+    (lambda _
+      (display (string-append
+                 "<?php
+// autoload.php @generated by Guix
+$psr4map = $classmap = array();
+require_once '" vendor "/autoload_conf.php';
+require_once '" (assoc-ref inputs "composer-classloader") "/share/web/composer/ClassLoader.php';
+$loader = new \\Composer\\Autoload\\ClassLoader();
+foreach ($psr4map as $namespace => $paths) {
+    foreach ($paths as $path) {
+        $loader->addPsr4($namespace, $path);
+    }
+}
+$loader->addClassMap($classmap);
+$loader->register();
+"))))
+  ;; Now, create autoload_conf.php that contains the actual data, as a set
+  ;; of arrays
+  (let* ((package-data (read-package-data #:filename composer-file))
+         (autoload (composer-package-autoload package-data))
+         (autoload-dev (composer-package-autoload-dev package-data))
+         (dependencies (composer-package-require package-data))
+         (dependencies-dev (composer-package-dev-require package-data)))
+    (with-output-to-file (string-append vendor "/autoload_conf.php")
+      (lambda _
+        (format #t "<?php~%")
+        (format #t "// autoload_conf.php @generated by Guix~%")
+        (force-output)
+        (for-each
+         (match-lambda
+           ((key . value)
+            (let ((vals (if (list? value)
+                            (reverse value)
+                            (list value))))
+              (apply
+               format
+               #t
+               (string-append
+                "$psr4map['~a'][] = ["
+                (string-join
+                 (make-list (length vals) "'~a/../~a'") ",")
+                "];~%")
+               (cons* (string-join (string-split key #\\) "\\\\")
+                      (append-map (lambda (v) (list vendor v)) vals)))))
+           (_ (format #t "")))
+         (delete-duplicates
+          (append
+           (composer-autoload-psr-4 autoload)
+           (if (and dev-dependencies? (not (null? autoload-dev)))
+               (composer-autoload-psr-4 autoload-dev)
+               '()))
+          '()))
+        (for-each
+         (lambda (psr0)
+           (match psr0
+             ((key . value)
+              (format #t "$psr4map['~a'][] = ['~a/../~a/~a'];~%"
+                      (string-join (string-split key #\\) "\\\\")
+                      vendor
+                      value
+                      (string-join (string-split key #\\) "/")))
+             (_ (format #t ""))))
+         (append
+          (composer-autoload-psr-0 autoload)
+          (if (and dev-dependencies? (not (null? autoload-dev)))
+              (composer-autoload-psr-0 autoload-dev)
+              '())))
+        (for-each
+         (lambda (classmap)
+           (for-each
+            (lambda (file)
+              (invoke "php" (assoc-ref inputs "findclass.php")
+                      "-i" (string-append vendor "/..") "-f" file))
+            (find-files classmap ".(php|hh|inc)$")))
+         (append
+          (composer-autoload-classmap autoload)
+          (if (and dev-dependencies? (not (null? autoload-dev)))
+              (composer-autoload-classmap autoload-dev)
+              '())))
+        (for-each
+         (lambda (file)
+           (format #t "require_once '~a/../~a';~%" vendor file))
+         (append
+          (composer-autoload-files autoload)
+          (if (and dev-dependencies? (not (null? autoload-dev)))
+              (composer-autoload-files autoload-dev)
+              '())))
+        (for-each
+         (lambda (dep)
+           (format
+            #t "require_once '~a';~%"
+            (search-input-file
+             inputs
+             (string-append "/share/web/" dep "/vendor/autoload_conf.php"))))
+          dependencies)
+        ;; Also add native-inputs that are not necessarily given in the
+        ;; composer.json. This allows to simply add a package in tests by
+        ;; adding it in native-inputs, without the need to patch composer.json.
+        (for-each
+         (match-lambda
+           ((name . loc)
+            (match (find-files loc "autoload_conf\\.php$")
+              (() #t)
+              (((? string? conf) . ())
+               (format #t "require_once '~a';~%" conf))
+              (_ #t)))
+           (_ #t))
+         (or inputs '()))))))
+
+(define* (install #:key inputs outputs composer-file #:allow-other-keys)
+  "Install the given package."
+  (let* ((out (assoc-ref outputs "out"))
+         (package-data (read-package-data #:filename composer-file))
+         (name (composer-package-name package-data))
+         (php-dir (string-append out "/share/web/" name))
+         (bin-dir (string-append php-dir "/vendor/bin"))
+         (bin (string-append out "/bin"))
+         (binaries (composer-package-binaries package-data)))
+      (mkdir-p php-dir)
+      (copy-recursively "." php-dir)
+      (mkdir-p (string-append php-dir "/vendor"))
+      (when binaries
+        (mkdir-p bin-dir)
+        (mkdir-p bin)
+        (for-each
+          (lambda (file)
+            (let ((installed-file (string-append bin-dir "/" (basename file)))
+                  (bin-file (string-append bin "/" (basename file)))
+                  (original-file (string-append php-dir "/" file)))
+              (symlink original-file installed-file)
+              (symlink original-file bin-file)))
+          binaries))
+      (create-autoload (string-append php-dir "/vendor")
+                       composer-file inputs)))
+
+(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)
+    (add-after 'install 'check check)
+    (add-after 'install 'create-test-autoload create-test-autoload)))
+
+(define* (composer-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))
+
+;;; composer-build-system.scm ends here
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