Allow requirements to specify a default formula.

This allows default resolution of requirements without user intervention.

Closes #19627.

5 files changed, 5 insertions, 0 deletions

diff --git a/Library/Formula/elixir.rb b/Library/Formula/elixir.rb
index 74b133d91..c129bac14 100644
--- a/Library/Formula/elixir.rb
+++ b/Library/Formula/elixir.rb
@@ -2,6 +2,7 @@ require 'formula'
 
 class ErlangInstalled < Requirement
   fatal true
+  default_formula 'erlang'
 
   satisfy { which 'erl' }
 
diff --git a/Library/Formula/mu.rb b/Library/Formula/mu.rb
index 9b50c5ea3..2d9d18f9a 100644
--- a/Library/Formula/mu.rb
+++ b/Library/Formula/mu.rb
@@ -3,6 +3,7 @@ require 'formula'
 class Emacs23Installed < Requirement
   fatal true
   env :userpaths
+  default_formula 'emacs'
 
   satisfy do
     `emacs --version 2>/dev/null` =~ /^GNU Emacs (\d{2})/
diff --git a/Library/Formula/mysql-connector-odbc.rb b/Library/Formula/mysql-connector-odbc.rb
index 06a7ed6d9..6bbbe3a7c 100644
--- a/Library/Formula/mysql-connector-odbc.rb
+++ b/Library/Formula/mysql-connector-odbc.rb
@@ -2,6 +2,7 @@ require 'formula'
 
 class MySqlInstalled < Requirement
   fatal true
+  default_formula 'mysql'
 
   satisfy { which 'mysql_config' }
 
diff --git a/Library/Formula/shocco.rb b/Library/Formula/shocco.rb
index bd6959517..c30df7b24 100644
--- a/Library/Formula/shocco.rb
+++ b/Library/Formula/shocco.rb
@@ -10,6 +10,7 @@ end
 
 class MarkdownProvider < Requirement
   fatal true
+  default_formula 'markdown'
 
   satisfy { which 'markdown' }
 
diff --git a/Library/Formula/signing-party.rb b/Library/Formula/signing-party.rb
index dfa02fae5..ecbb8c6b7 100644
--- a/Library/Formula/signing-party.rb
+++ b/Library/Formula/signing-party.rb
@@ -2,6 +2,7 @@ require 'formula'
 
 class GnupgInstalled < Requirement
   fatal true
+  default_formula 'gnupg2'
 
   satisfy { which('gpg') || which('gpg2') }