before_install_linux.sh in rmagick-2.13.4 vs before_install_linux.sh in rmagick-2.14.0

@@ -1,12 +1,21 @@
 dpkg --list imagemagick
 sudo apt-get update
-sudo apt-get remove imagemagick
-sudo apt-get install build-essential libx11-dev libxext-dev zlib1g-dev libpng12-dev libjpeg-dev libfreetype6-dev libxml2-dev
-sudo apt-get build-dep imagemagick
-wget http://www.imagemagick.org/download/releases/ImageMagick-${IMAGEMAGICK_VERSION}.tar.gz
-tar -xzvf ImageMagick-${IMAGEMAGICK_VERSION}.tar.gz
-cd ImageMagick-${IMAGEMAGICK_VERSION}
+sudo apt-get remove -y imagemagick
+sudo apt-get install -y build-essential libx11-dev libxext-dev zlib1g-dev libpng12-dev libjpeg-dev libfreetype6-dev libxml2-dev
+sudo apt-get build-dep -y imagemagick
+case $IMAGEMAGICK_VERSION in
+    latest)
+        wget http://www.imagemagick.org/download/ImageMagick.tar.gz
+        tar -xzvf ImageMagick.tar.gz
+        cd ImageMagick-*
+    ;;
+    *)
+        wget http://www.imagemagick.org/download/releases/ImageMagick-${IMAGEMAGICK_VERSION}.tar.gz
+        tar -xzvf ImageMagick-${IMAGEMAGICK_VERSION}.tar.gz
+        cd ImageMagick-${IMAGEMAGICK_VERSION}
+    ;;
+esac
 ./configure --prefix=/usr $CONFIGURE_OPTIONS
 sudo make install
 cd ..
 sudo ldconfig