guix: Add clojure-utils.

* guix/build/clojure-utils.scm: New file.
* gnu/packages/lisp.scm (clojure)[arguments]: Use it.
* Makefile.am (MODULES): Add it.

Makefile.am

@@ -12,6 +12,7 @@
 # Copyright © 2018 Nils Gillmann <ng0@n0.is>
 # Copyright © 2018 Julien Lepiller <julien@lepiller.eu>
 # Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
+# Copyright © 2018 Alex Vong <alexvong1995@gmail.com>
 #
 # This file is part of GNU Guix.
 #
@@ -172,6 +173,7 @@ MODULES =					\
   guix/build/syscalls.scm                       \
   guix/build/gremlin.scm			\
   guix/build/debug-link.scm			\
+  guix/build/clojure-utils.scm			\
   guix/build/emacs-utils.scm			\
   guix/build/java-utils.scm			\
   guix/build/lisp-utils.scm			\

gnu/packages/lisp.scm

@@ -600,6 +600,7 @@ (define-public clojure
          (library-names (match libraries
                           (((library-name _) ...)
                            library-name))))
+
     (package
       (name "clojure")
       (version "1.9.0")
@@ -613,11 +614,13 @@ (define-public clojure
           (base32 "0xjbzcw45z32vsn9pifp7ndysjzqswp5ig0jkjpivigh2ckkdzha"))))
       (build-system ant-build-system)
       (arguments
-       `(#:modules ((guix build ant-build-system)
+       `(#:imported-modules ((guix build clojure-utils)
+                             (guix build guile-build-system)
+                             ,@%ant-build-system-modules)
+         #:modules ((guix build ant-build-system)
+                    (guix build clojure-utils)
                     (guix build java-utils)
                     (guix build utils)
-                    (ice-9 ftw)
-                    (ice-9 regex)
                     (srfi srfi-26))
          #:test-target "test"
          #:phases
@@ -643,18 +646,8 @@ (define (extract-library name)
                #t))
            (add-after 'build 'build-javadoc ant-build-javadoc)
            (replace 'install (install-jars "./"))
-           (add-after 'install 'install-doc
+           (add-after 'install-license-files 'install-doc
-             (lambda* (#:key outputs #:allow-other-keys)
+             (cut install-doc #:doc-dirs '("doc/clojure/") <...>))
-               (let ((doc-dir (string-append (assoc-ref outputs "out")
-                                             "/share/doc/clojure-"
-                                             ,version "/")))
-                 (copy-recursively "doc/clojure" doc-dir)
-                 (for-each (cut install-file <> doc-dir)
-                           (filter (cut string-match
-                                     ".*\\.(html|markdown|md|txt)"
-                                     <>)
-                                   (scandir "./")))
-                 #t)))
            (add-after 'install-doc 'install-javadoc
              (install-javadoc "target/javadoc/")))))
       (native-inputs libraries)

guix/build/clojure-utils.scm

@@ -0,0 +1,65 @@
+;;; 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-utils)
+  #:use-module (guix build utils)
+  #:use-module (ice-9 ftw)
+  #:use-module (ice-9 regex)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:export (%clojure-regex
+            define-with-docs
+            install-doc))
+
+(define-syntax-rule (define-with-docs name docs val)
+  "Create top-level variable named NAME with doc string DOCS and value VAL."
+  (begin (define name val)
+         (set-object-property! name 'documentation docs)))
+
+(define-with-docs %doc-regex
+  "Default regex for matching the base name of top-level documentation files."
+  (format #f
+          "(~a)|(\\.(html|markdown|md|txt)$)"
+          (@@ (guix build guile-build-system)
+              %documentation-file-regexp)))
+
+(define* (install-doc #:key
+                      doc-dirs
+                      (doc-regex %doc-regex)
+                      outputs
+                      #:allow-other-keys)
+  "Install the following to the default documentation directory:
+
+1. Top-level files with base name matching DOC-REGEX.
+2. All files (recursively) inside DOC-DIRS.
+
+DOC-REGEX can be compiled or uncompiled."
+  (let* ((out (assoc-ref outputs "out"))
+         (doc (assoc-ref outputs "doc"))
+         (name-ver (strip-store-file-name out))
+         (dest-dir (string-append (or doc out) "/share/doc/" name-ver "/"))
+         (doc-regex* (if (string? doc-regex)
+                         (make-regexp doc-regex)
+                         doc-regex)))
+    (for-each (cut install-file <> dest-dir)
+              (remove (compose file-exists?
+                               (cut string-append dest-dir <>))
+                      (scandir "./" (cut regexp-exec doc-regex* <>))))
+    (for-each (cut copy-recursively <> dest-dir)
+              doc-dirs)
+    #t))