From 22b3a95f6eb375c9ca89af9eeee8ec9903abd557 Mon Sep 17 00:00:00 2001
From: Christopher Baines <mail@cbaines.net>
Date: Fri, 17 Jul 2020 09:43:11 +0100
Subject: [PATCH] build-system/maven: Make default-maven-plugins a procedure.

This allows compiling the module without the (gnu packages maven) module being
available.

* guix/build-system/maven.scm (%default-maven-plugins): Rename to
default-maven-plugins, and convert to a procedure.
* doc/guix.texi (maven-build-system): Update.
---
 doc/guix.texi               | 2 +-
 guix/build-system/maven.scm | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 2041d10447..2c5c017eea 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -6849,7 +6849,7 @@ corresponding argument, @code{#:jdk} and @code{#:maven}.
 
 The @code{#:maven-plugins} argument is a list of maven plugins used during
 the build, with the same format as the @code{inputs} fields of the package
-declaration.  Its default value is @code{%default-maven-plugins} which is
+declaration.  Its default value is @code{(default-maven-plugins)} which is
 also exported.
 @end defvr
 
diff --git a/guix/build-system/maven.scm b/guix/build-system/maven.scm
index 88ae1ce7bc..2dceefccc1 100644
--- a/guix/build-system/maven.scm
+++ b/guix/build-system/maven.scm
@@ -28,7 +28,7 @@
   #:use-module (srfi srfi-1)
   #:export (%maven-build-system-modules
             default-maven
-            %default-maven-plugins
+            default-maven-plugins
             %default-exclude
             lower
             maven-build
@@ -96,7 +96,7 @@
   (let ((jdk-mod (resolve-interface '(gnu packages java))))
     (module-ref jdk-mod 'icedtea)))
 
-(define %default-maven-plugins
+(define (default-maven-plugins)
   `(("maven-compiler-plugin" ,(default-maven-compiler-plugin))
     ("maven-jar-plugin" ,(default-maven-jar-plugin))
     ("maven-resources-plugin" ,(default-maven-resources-plugin))
@@ -112,7 +112,7 @@
                 #:key source inputs native-inputs outputs system target
                 (maven (default-maven))
                 (jdk (default-jdk))
-                (maven-plugins %default-maven-plugins)
+                (maven-plugins (default-maven-plugins))
                 (local-packages '())
                 (exclude %default-exclude)
                 #:allow-other-keys