1 files changed, 18 insertions, 1 deletions
diff --git a/Library/Formula/pass.rb b/Library/Formula/pass.rb
index 082b6ea1b..23bf0abc7 100644
--- a/Library/Formula/pass.rb
+++ b/Library/Formula/pass.rb
@@ -1,5 +1,22 @@
 require 'formula'
 
+class GpgRequirement < Requirement
+  fatal true
+  default_formula 'gnupg2'
+
+  satisfy do
+    %w(gpg gpg2).any? { |gpg| which gpg }
+  end
+
+  def message; <<-EOS.undent
+    pass requires GPG to be installed. Please install GPG in one of three ways:
+    - Install the gnupg2 package through Homebrew
+    - Install the gpgtools package through Homebrew Cask
+    - Download and install gpgtools from https://gpgtools.org/
+    EOS
+  end
+end
+
 class Pass < Formula
   homepage 'http://www.passwordstore.org/'
   url 'http://git.zx2c4.com/password-store/snapshot/password-store-1.6.3.tar.xz'
@@ -17,7 +34,7 @@ class Pass < Formula
   depends_on 'pwgen'
   depends_on 'tree'
   depends_on 'gnu-getopt'
-  depends_on 'gnupg2'
+  depends_on GpgRequirement
 
   def install
     system "make DESTDIR=#{prefix} PREFIX=/ install"