brew-info: specify whether poured or built.

- Store in the tab if a bottle was poured for the build.
- Add an additional line of output to `brew info` outputting whether
  the formula was built from source or poured from a bottle.

Closes Homebrew/homebrew#18430.
Closes Homebrew/homebrew#18475.

Library/Homebrew/cmd/info.rb

@@ -103,6 +103,13 @@ module Homebrew extend self
         print " *" if keg.linked?
         puts
         tab = Tab.for_keg keg
+
+        # Intentionally print no message if this is nil because it's unknown.
+        case tab.poured_from_bottle
+        when true then puts "Poured from bottle"
+        when false then puts "Built from source"
+        end
+
         unless tab.used_options.empty?
           puts "  Installed with: #{tab.used_options*', '}"
         end

Library/Homebrew/formula.rb

@@ -503,7 +503,8 @@ class Formula
         hsh["installed"] << {
           "version" => keg.basename.to_s,
           "used_options" => tab.used_options.map(&:flag),
-          "built_as_bottle" => tab.built_bottle
+          "built_as_bottle" => tab.built_bottle,
+          "poured_from_bottle" => tab.poured_from_bottle
         }
       end
     end

Library/Homebrew/formula_installer.rb

@@ -97,6 +97,10 @@ class FormulaInstaller
       if pour_bottle?
         pour
         @poured_bottle = true
+        tab = Tab.for_keg f.prefix
+        tab.poured_from_bottle = true
+        tab.tabfile.delete rescue nil
+        tab.write
       end
     rescue
       opoo "Bottle installation failed: building from source."

Library/Homebrew/tab.rb

@@ -21,6 +21,7 @@ class Tab < OpenStruct
             :unused_options => f.build.unused_options,
             :tabfile => f.prefix.join(FILENAME),
             :built_as_bottle => !!ARGV.build_bottle?,
+            :poured_from_bottle => false,
             :tapped_from => f.tap,
             :time => Time.now.to_i, # to_s would be better but Ruby has no from_s function :P
             :HEAD => sha
@@ -53,6 +54,7 @@ class Tab < OpenStruct
     Tab.new :used_options => [],
             :unused_options => (f.build.as_flags rescue []),
             :built_as_bottle => false,
+            :poured_from_bottle => false,
             :tapped_from => "",
             :time => nil,
             :HEAD => nil
@@ -93,6 +95,7 @@ class Tab < OpenStruct
       :used_options => used_options.to_a,
       :unused_options => unused_options.to_a,
       :built_as_bottle => built_as_bottle,
+      :poured_from_bottle => poured_from_bottle,
       :tapped_from => tapped_from,
       :time => time,
       :HEAD => send("HEAD")})