Add caveats class and use in brew info.

Probably a better approach than reverted e721c7.

Fixes Homebrew/homebrew#16604.

Library/Homebrew/caveats.rb

@@ -0,0 +1,85 @@
+class Caveats
+  def self.print f
+    s = []
+
+    unless f.caveats.to_s.strip.empty?
+      s << f.caveats
+    end
+
+    keg = Keg.new(f.prefix) rescue nil
+    keg ||= Keg.new(f.opt_prefix.realpath) rescue nil
+    keg ||= Keg.new(f.linked_keg.realpath) rescue nil
+
+    if keg and keg.completion_installed? :bash
+      s << "\n" unless s.empty?
+      s << <<-EOS.undent
+        Bash completion has been installed to:
+          #{HOMEBREW_PREFIX}/etc/bash_completion.d
+        EOS
+    end
+
+    if keg and keg.completion_installed? :zsh
+      s << "\n" unless s.empty?
+      s <<  <<-EOS.undent
+        zsh completion has been installed to:
+          #{HOMEBREW_PREFIX}/share/zsh/site-functions
+        EOS
+    end
+
+    if f.plist or (keg and keg.plist_installed?)
+      s << "\n" unless s.empty?
+
+      destination = f.plist_startup ? '/Library/LaunchDaemons' \
+                                    : '~/Library/LaunchAgents'
+
+      plist_filename = f.plist_path.basename
+      plist_link = "#{destination}/#{plist_filename}"
+      plist_domain = f.plist_path.basename('.plist')
+      destination_path = Pathname.new File.expand_path destination
+      plist_path = destination_path/plist_filename
+
+      # we readlink because this path probably doesn't exist since caveats
+      # occurs before the link step of installation
+      if (not plist_path.file?) and (not plist_path.symlink?)
+        if f.plist_startup
+          s << "To have launchd start #{f.name} at startup:"
+          s << "    sudo mkdir -p #{destination}" unless destination_path.directory?
+          s << "    sudo cp -fv #{HOMEBREW_PREFIX}/opt/#{f.name}/*.plist #{destination}"
+        else
+          s << "To have launchd start #{f.name} at login:"
+          s << "    mkdir -p #{destination}" unless destination_path.directory?
+          s << "    ln -sfv #{HOMEBREW_PREFIX}/opt/#{f.name}/*.plist #{destination}"
+        end
+        s << "Then to load #{f.name} now:"
+        if f.plist_startup
+          s << "    sudo launchctl load #{plist_link}"
+        else
+          s << "    launchctl load #{plist_link}"
+        end
+        if f.plist_manual
+          s << "Or, if you don't want/need launchctl, you can just run:"
+          s << "    #{f.plist_manual}"
+        end
+      elsif Kernel.system "/bin/launchctl list #{plist_domain} &>/dev/null"
+        s << "You should reload #{f.name}:"
+        if f.plist_startup
+          s << "    sudo launchctl unload #{plist_link}"
+          s << "    sudo cp -fv #{HOMEBREW_PREFIX}/opt/#{f.name}/*.plist #{destination}"
+          s << "    sudo launchctl load #{plist_link}"
+        else
+          s << "    launchctl unload #{plist_link}"
+          s << "    launchctl load #{plist_link}"
+        end
+      else
+        s << "To load #{f.name}:"
+        if f.plist_startup
+          s << "    sudo launchctl load #{plist_link}"
+        else
+          s << "    launchctl load #{plist_link}"
+        end
+      end
+    end
+
+    ohai 'Caveats', s unless s.empty?
+  end
+end

Library/Homebrew/cmd/info.rb

@@ -1,6 +1,7 @@
 require 'formula'
 require 'tab'
 require 'keg'
+require 'caveats'
 
 module Homebrew extend self
   def info
@@ -119,10 +120,7 @@ module Homebrew extend self
       Homebrew.dump_options_for_formula f
     end
 
-    unless f.caveats.to_s.strip.empty?
+    Caveats.print f
-      ohai "Caveats"
-      puts f.caveats
-    end
 
   rescue FormulaUnavailableError
     # check for DIY installation

Library/Homebrew/formula_installer.rb

@@ -3,6 +3,7 @@ require 'formula'
 require 'keg'
 require 'tab'
 require 'bottles'
+require 'caveats'
 
 class FormulaInstaller
   attr :f
@@ -143,18 +144,7 @@ class FormulaInstaller
   end
 
   def caveats
-    s = []
+    if (not f.keg_only?) and ARGV.homebrew_developer?
-
-    unless f.caveats.to_s.strip.empty?
-      s << f.caveats
-      @show_summary_heading = true
-    end
-
-    if f.keg_only?
-      s << "\n" unless s.empty?
-      s << f.keg_only_text
-      @show_summary_heading = true
-    elsif ARGV.homebrew_developer?
       audit_bin
       audit_sbin
       audit_lib
@@ -162,81 +152,7 @@ class FormulaInstaller
       check_infopages
     end
 
-    keg = Keg.new(f.prefix) rescue nil
+    Caveats.print f
-    keg ||= Keg.new(f.opt_prefix.realpath) rescue nil
-    keg ||= Keg.new(f.linked_keg.realpath) rescue nil
-
-    if keg and keg.completion_installed? :bash
-      s << "\n" unless s.empty?
-      s << <<-EOS.undent
-        Bash completion has been installed to:
-          #{HOMEBREW_PREFIX}/etc/bash_completion.d
-        EOS
-    end
-
-    if keg and keg.completion_installed? :zsh
-      s << "\n" unless s.empty?
-      s <<  <<-EOS.undent
-        zsh completion has been installed to:
-          #{HOMEBREW_PREFIX}/share/zsh/site-functions
-        EOS
-    end
-
-    if f.plist or (keg and keg.plist_installed?)
-      s << "\n" unless s.empty?
-
-      destination = f.plist_startup ? '/Library/LaunchDaemons' \
-                                    : '~/Library/LaunchAgents'
-
-      plist_filename = f.plist_path.basename
-      plist_link = "#{destination}/#{plist_filename}"
-      plist_domain = f.plist_path.basename('.plist')
-      destination_path = Pathname.new File.expand_path destination
-      plist_path = destination_path/plist_filename
-
-      # we readlink because this path probably doesn't exist since caveats
-      # occurs before the link step of installation
-      if (not plist_path.file?) and (not plist_path.symlink?)
-        if f.plist_startup
-          s << "To have launchd start #{f.name} at startup:"
-          s << "    sudo mkdir -p #{destination}" unless destination_path.directory?
-          s << "    sudo cp -fv #{HOMEBREW_PREFIX}/opt/#{f.name}/*.plist #{destination}"
-        else
-          s << "To have launchd start #{f.name} at login:"
-          s << "    mkdir -p #{destination}" unless destination_path.directory?
-          s << "    ln -sfv #{HOMEBREW_PREFIX}/opt/#{f.name}/*.plist #{destination}"
-        end
-        s << "Then to load #{f.name} now:"
-        if f.plist_startup
-          s << "    sudo launchctl load #{plist_link}"
-        else
-          s << "    launchctl load #{plist_link}"
-        end
-        if f.plist_manual
-          s << "Or, if you don't want/need launchctl, you can just run:"
-          s << "    #{f.plist_manual}"
-        end
-      elsif Kernel.system "/bin/launchctl list #{plist_domain} &>/dev/null"
-        s << "You should reload #{f.name}:"
-        if f.plist_startup
-          s << "    sudo launchctl unload #{plist_link}"
-          s << "    sudo cp -fv #{HOMEBREW_PREFIX}/opt/#{f.name}/*.plist #{destination}"
-          s << "    sudo launchctl load #{plist_link}"
-        else
-          s << "    launchctl unload #{plist_link}"
-          s << "    launchctl load #{plist_link}"
-        end
-      else
-        s << "To load #{f.name}:"
-        if f.plist_startup
-          s << "    sudo launchctl load #{plist_link}"
-        else
-          s << "    launchctl load #{plist_link}"
-        end
-      end
-    end
-
-    ohai 'Caveats', s unless s.empty?
   end
 
   def finish