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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Alex Vong <alexvong1995@gmail.com>
+;;;
+;;; 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 clojure-build-system)
+  #:use-module ((guix build ant-build-system)
+                #:select ((%standard-phases . %standard-phases@ant)
+                          ant-build))
+  #:use-module (guix build clojure-utils)
+  #:use-module (guix build java-utils)
+  #:use-module (guix build utils)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:export (%standard-phases
+            clojure-build))
+
+;; Commentary:
+;;
+;; Builder-side code of the standard build procedure for Clojure packages.
+;;
+;; Code:
+
+(define* (build #:key
+                source-dirs compile-dir
+                jar-names main-class omit-source?
+                aot-include aot-exclude
+                #:allow-other-keys)
+  "Standard 'build' phase for clojure-build-system."
+  (let* ((libs (append-map find-clojure-libs source-dirs))
+         (libs* (include-list\exclude-list aot-include
+                                           aot-exclude
+                                           #:all-list libs)))
+    (mkdir-p compile-dir)
+    (eval-with-clojure `(run! compile ',libs*)
+                       source-dirs)
+    (let ((source-dir-files-alist (map (lambda (dir)
+                                         (cons dir (find-files* dir)))
+                                       source-dirs))
+          ;; workaround transitive compilation in Clojure
+          (classes (filter (lambda (class)
+                             (any (cut compiled-from? class <>)
+                                  libs*))
+                           (find-files* compile-dir))))
+      (for-each (cut create-jar <> (cons (cons compile-dir classes)
+                                         (if omit-source?
+                                             '()
+                                             source-dir-files-alist))
+                     #:main-class main-class)
+                jar-names)
+      #t)))
+
+(define* (check #:key
+                test-dirs
+                jar-names
+                tests? test-include test-exclude
+                #:allow-other-keys)
+  "Standard 'check' phase for clojure-build-system.  Note that TEST-EXCLUDE has
+priority over TEST-INCLUDE."
+  (if tests?
+      (let* ((libs (append-map find-clojure-libs test-dirs))
+             (libs* (include-list\exclude-list test-include
+                                               test-exclude
+                                               #:all-list libs)))
+        (for-each (lambda (jar)
+                    (eval-with-clojure `(do (apply require
+                                                   '(clojure.test ,@libs*))
+                                            (apply clojure.test/run-tests
+                                                   ',libs*))
+                                       (cons jar test-dirs)))
+                  jar-names)))
+  #t)
+
+(define-with-docs install
+  "Standard 'install' phase for clojure-build-system."
+  (install-jars "./"))
+
+(define-with-docs %standard-phases
+  "Standard build phases for clojure-build-system."
+  (modify-phases %standard-phases@ant
+    (replace 'build build)
+    (replace 'check check)
+    (replace 'install install)
+    (add-after 'install-license-files 'install-doc install-doc)))
+
+(define* (clojure-build #:key
+                        inputs
+                        (phases %standard-phases)
+                        #:allow-other-keys
+                        #:rest args)
+  "Build the given Clojure package, applying all of PHASES in order."
+  (apply ant-build
+         #:inputs inputs
+         #:phases phases
+         args))
+
+;;; clojure-build-system.scm ends here