bottle/test-bot: deep merge bottle JSON hashes.

Library/Homebrew/cmd/bottle.rb

@@ -336,7 +336,7 @@ module Homebrew
     write = ARGV.include? "--write"
 
     bottles_hash = ARGV.named.reduce({}) do |hash, json_file|
-      hash.merge! Utils::JSON.load(IO.read(json_file))
+      deep_merge_hashes hash, Utils::JSON.load(IO.read(json_file))
     end
 
     bottles_hash.each do |formula_name, bottle_hash|

Library/Homebrew/cmd/test-bot.rb

@@ -821,7 +821,7 @@ module Homebrew
     formula_packaged = {}
 
     bottles_hash = json_files.reduce({}) do |hash, json_file|
-      hash.merge! Utils::JSON.load(IO.read(json_file))
+      deep_merge_hashes hash, Utils::JSON.load(IO.read(json_file))
     end
 
     bottles_hash.each do |formula_name, bottle_hash|

Library/Homebrew/utils.rb

@@ -1,5 +1,6 @@
 require "pathname"
 require "exceptions"
+require "utils/hash"
 require "utils/json"
 require "utils/inreplace"
 require "utils/popen"

Library/Homebrew/utils/hash.rb

@@ -0,0 +1,10 @@
+def deep_merge_hashes(hash1, hash2)
+  merger = proc do |key, v1, v2|
+    if Hash === v1 && Hash === v2
+      v1.merge v2, &merger
+    else
+      v2
+    end
+  end
+  hash1.merge hash2, &merger
+end