nongnu: Make leiningen self-contained.

* nongnu/packages/clojure.scm (leiningen-jar): New variable.
 (leiningen): Use downloaded jar-file.

nongnu/packages/clojure.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
+;;; Copyright © 2020 Jelle Licht <jlicht@fsfe.org>
 ;;;
 ;;; This file is not part of GNU Guix.
 ;;;
@@ -18,39 +19,75 @@
 
 (define-module (nongnu packages clojure)
   #:use-module (guix packages)
-  #:use-module (guix build-system ant)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix build-system trivial)
   #:use-module (guix download)
+  #:use-module (guix git-download)
   #:use-module ((guix licenses) #:prefix license:))
 
+;; This is a hidden package, as it does not really serve a purpose on its own.
+(define leiningen-jar
+  (package
+    (name "leiningen-jar")
+    (version "2.9.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://github.com/technomancy/leiningen/releases/download/"
+                                  version "/leiningen-2.9.1-standalone.zip"))
+              (file-name "leiningen-standalone.jar")
+              (sha256
+               (base32
+                "1y2mva5s2w2szzn1b9rhz0dvkffls4ravii677ybcf2w9wd86z7a"))))
+    (build-system trivial-build-system)
+    (arguments
+     `(#:modules ((guix build utils))
+       #:builder (begin
+                   (use-modules (guix build utils))
+                   (let ((source (assoc-ref %build-inputs "source"))
+                         (jar-dir (string-append %output "/share/")))
+                     (mkdir-p jar-dir)
+                     (copy-file source
+                                (string-append jar-dir "leiningen-standalone.jar"))))))
+    (home-page "https://leiningen.org")
+    (synopsis "Automate Clojure projects without setting your hair on fire")
+    (description "Leiningen is a Clojure tool with a focus on project
+automation and declarative configuration.  It gets out of your way and
+lets you focus on your code.")
+    (license license:epl1.0)))
+
 (define-public leiningen
   (package
+    (inherit leiningen-jar)
     (name "leiningen")
     (version "2.9.1")
     (source (origin
-              (method url-fetch/tarbomb)
+              (method git-fetch)
-              (uri (string-append
+              (uri (git-reference
-                    "https://github.com/technomancy/leiningen/archive/"
+                    (url "https://github.com/technomancy/leiningen.git")
-                    version ".tar.gz"))
+                    (commit version)))
-              (file-name (string-append name "-" version))
+              (file-name (git-file-name name version))
               (sha256
                (base32
-                "0acbmgs9sq6rc24b0ly2345pvyfky03s3gzmzvi98vsp0ys3khm4"))))
+                "0qv9vp6ypdilwv818fpwknr9sj40sz2vdcqxbd42m1l0ljjggiy1"))))
-    (build-system ant-build-system)
+    (build-system gnu-build-system)
     (arguments
-     `(#:phases
+     `(#:tests? #f
-       (modify-phases %standard-phases
+       #:phases (modify-phases %standard-phases
                   (delete 'configure)
                   (delete 'build)
-         (delete 'check)
                   (replace 'install
-           (lambda* (#:key outputs #:allow-other-keys)
+                    (lambda _
-             (install-file (string-append
+                      (let* ((lein-pkg (string-append (assoc-ref %build-inputs "source") "/bin/lein-pkg"))
-                            "leiningen-" ,version "/bin/lein")
+                             (lein-jar (string-append (assoc-ref  %build-inputs "leiningen-jar")
-                           (string-append
+                                                      "/share/leiningen-standalone.jar"))
-                            (assoc-ref outputs "out") "/bin")))))))
+                             (bin-dir (string-append %output "/bin"))
-    (home-page "https://leiningen.org")
+                             (lein (string-append bin-dir "/lein")))
-    (synopsis "Automating Clojure projects without setting your hair on fire")
+                        (mkdir-p bin-dir)
-    (description "Leiningen is an easy way to use Clojure.  With a focus
+                        (copy-file lein-pkg lein)
-on project automation and declarative configuration, it gets out of your way
+                        (patch-shebang lein)
-and lets you focus on your code.")
+                        (chmod lein #o555)
-    (license license:epl1.0)))
+                        (substitute* lein
+                          (("LEIN_JAR=.*") (string-append "LEIN_JAR=" lein-jar)))
+                        #t))))))
+    (inputs
+     `(("leiningen-jar" ,leiningen-jar)))))