Merge pull request #23 from cesc1989/master

Fixes for ImageMagick installation and RVM in MacOS

Author: cesc1989

dependencies/install_rvm.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 # Do not run as sudo or there could be trouble setting up RVM
 
-gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
+gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
 \curl -sSL https://get.rvm.io | bash -s stable
 
 echo "Sourcing RVM and reloading shell"
@@ -23,4 +23,4 @@ gem install bundler --no-rdoc --no-ri
 # shell which gets invoked inside the script and not the
 # terminal window
 echo "...again"
-. /home/$(whoami)/.rvm/scripts/rvm
+. /home/$(whoami)/.rvm/scripts/rvm

macos/install_imagemagick.sh

@@ -1,6 +1,22 @@
 #!/bin/bash
 
+# Resources:
+#   - http://stackoverflow.com/questions/25460047/cant-install-imagemagick-with-brew-on-mac-os-x-mavericks
+#   - https://glucode.com/blog/installing-rmagick-gem-with-imagemagick-and-homebrew-on-macos-10-14-mojave
+
 brew update
-brew install imagemagick --disable-openmp --build-from-source
+brew install imagemagick@6
 
-# http://stackoverflow.com/questions/25460047/cant-install-imagemagick-with-brew-on-mac-os-x-mavericks
+# Verify installation with command
+# 
+#     $ convert -version
+# 
+# If the command is not found by the terminal do:
+# 
+#     $ brew link imagemagick@6 --force
+# 
+# Or find the path of the installation and add it to `PATH`
+# 
+#     /usr/local/opt/imagemagick@6/bin
+# 
+# See comments beginning with https://github.com/rmagick/rmagick/issues/256#issuecomment-273113469

macos/install_rvm.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+brew install gpg
+
+gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
+\curl -sSL https://get.rvm.io | bash -s stable
+
+echo "Sourcing RVM and reloading shell"
+. /Users/$(whoami)/.rvm/scripts/rvm
+
+echo "RVM requirements"
+rvm requirements
+
+echo "Installing ruby-2.5.3"
+rvm install ruby-2.5.3
+
+echo "Setting ruby-2.5.3 as default"
+rvm --default use ruby-2.5.3
+
+echo "Install bundler"
+gem install bundler --no-document
+
+# This wouldn't work because it is executed in a different
+# shell which gets invoked inside the script and not the
+# terminal window
+echo "...again"
+. /Users/$(whoami)/.rvm/scripts/rvm