Only extract from JAR what we need

bsdtar seems to have issues when the JAR is extracted over earlier extracted
data:
  ... Can't replace existing directory with non-directory

1 files changed, 6 insertions, 0 deletions

diff --git a/PKGBUILD b/PKGBUILD
index 1969cf7db7c1..ea6a693ef6f1 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -20,10 +20,16 @@ optdepends=(
 source=(https://github.com/JabRef/jabref/releases/download/v${pkgver}/JabRef-${pkgver}.jar
         jabref.sh
         jabref.desktop)
+noextract=(JabRef-${pkgver}.jar)
 sha256sums=('b5a9148008005f7ba081614693275d6b9226875286e99cda47d2648c583708a7'
             '0355f5135a6d855416160d4ff1cf8fe5e55921088b83491647b6a714dae87dda'
             'f958793f6e408bab7db84973169b30ed61077112d3f552dbcc9f068847317602')
 
+prepare() {
+  cd ${srcdir}
+  bsdtar -xf JabRef-${pkgver}.jar images/icons/JabRef-icon-48.png
+}
+
 package() {
   cd ${srcdir}
   install -Dm755 JabRef-${pkgver}.jar ${pkgdir}/usr/share/java/${pkgname}/JabRef-${pkgver}.jar