Use PRODUCTION envvar directly in hermes-engine Pod to determine build type (#34776)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/34776

CocoaPods is not used when Hermes is built in Circle CI, so we cannot rely on the React Native CocoaPods scripts to be loaded.
The get_hermes_build_type function is removed from the RN CocoaPods scripts and in its place, the ENV['PRODUCTION'] envvar is accessed directly.

Changelog: [Internal]

Reviewed By: cipolleschi

Differential Revision: D39778190

fbshipit-source-id: 12083b7b4533b4ad7bb7a08612883983a0583616

scripts/cocoapods/__tests__/hermes-test.rb

@@ -22,7 +22,6 @@ class HermesTests < Test::Unit::TestCase
         Pod::Config.reset()
         Pod::UI.reset()
         podSpy_cleanUp()
-        ENV['PRODUCTION'] = '0'
     end
 
     # ============================= #
@@ -84,55 +83,4 @@ class HermesTests < Test::Unit::TestCase
         assert_equal($podInvocation["libevent"][:version], "~> 2.1.12")
         assert_equal($podInvocation["hermes-engine"][:podspec], "../../sdks/hermes/hermes-engine.podspec")
     end
-
-    # ========================= #
-    # TEST - getHermesBuildType #
-    # ========================= #
-    def test_getHermesBuildType_whenNotInProduction
-        # Arrange
-        ENV['PRODUCTION'] = '0'
-
-        # Act
-        build_type = get_hermes_build_type
-
-        # Assert
-        assert_equal(build_type, :debug)
-    end
-
-    def test_getHermesBuildType_whenInProduction
-        # Arrange
-        ENV['PRODUCTION'] = '1'
-
-        # Act
-        build_type = get_hermes_build_type
-
-        # Assert
-        assert_equal(build_type, :release)
-    end
-
-    def test_getHermesBuildType_whenProductionIsNotSet
-        # Arrange
-        ENV.delete 'PRODUCTION'
-
-        # Act
-        build_type = get_hermes_build_type
-
-        # Assert
-        assert_equal(build_type, :debug)
-    end
-
-    def test_getHermesBuildType_symbolsMatchStrings
-        # Arrange
-        ENV['PRODUCTION'] = '0'
-
-        # Act
-        build_type = get_hermes_build_type
-
-        # Assert
-        assert_equal(build_type, :debug)
-        assert_equal(build_type.to_s, "debug")
-        assert_equal(build_type.to_s.capitalize, "Debug")
-    end
-
-
 end

scripts/cocoapods/hermes.rb

@@ -18,7 +18,3 @@ def install_hermes_if_enabled(hermes_enabled, react_native_path)
     pod 'libevent', '~> 2.1.12'
     pod 'hermes-engine', :podspec => "#{react_native_path}/sdks/hermes/hermes-engine.podspec"
 end
-
-def get_hermes_build_type()
-    return ENV['PRODUCTION'] == "1" ? :release : :debug
-end

sdks/hermes-engine/hermes-engine.podspec

@@ -7,6 +7,9 @@ require "json"
 
 react_native_path = File.join(__dir__, "..", "..")
 
+# Whether Hermes is built for Release or Debug is determined by the PRODUCTION envvar.
+build_type = ENV['PRODUCTION'] == "1" ? :release : :debug
+
 # package.json
 package_file = File.join(react_native_path, "package.json")
 package = JSON.parse(File.read(package_file))
@@ -35,7 +38,7 @@ elsif File.exists?(hermestag_file) && isInCI
   source[:git] = git
   source[:tag] = hermestag
 else
-  source[:http] = "https://github.com/facebook/react-native/releases/download/v#{version}/hermes-runtime-darwin-#{get_hermes_build_type.to_s}-v#{version}.tar.gz"
+  source[:http] = "https://github.com/facebook/react-native/releases/download/v#{version}/hermes-runtime-darwin-#{build_type.to_s}-v#{version}.tar.gz"
 end
 
 Pod::Spec.new do |spec|
@@ -49,7 +52,7 @@ Pod::Spec.new do |spec|
   spec.source      = source
   spec.platforms   = { :osx => "10.13", :ios => "12.4" }
 
-  spec.preserve_paths      = ["destroot/bin/*"].concat(get_hermes_build_type == :debug ? ["**/*.{h,c,cpp}"] : [])
+  spec.preserve_paths      = ["destroot/bin/*"].concat(build_type == :debug ? ["**/*.{h,c,cpp}"] : [])
   spec.source_files        = "destroot/include/**/*.h"
   spec.header_mappings_dir = "destroot/include"
 
@@ -59,12 +62,12 @@ Pod::Spec.new do |spec|
   spec.xcconfig            = {
     "CLANG_CXX_LANGUAGE_STANDARD" => "c++17",
     "CLANG_CXX_LIBRARY" => "compiler-default",
-    "GCC_PREPROCESSOR_DEFINITIONS" => "HERMES_ENABLE_DEBUGGER=#{get_hermes_build_type == :debug ? "1" : "0"}"
+    "GCC_PREPROCESSOR_DEFINITIONS" => "HERMES_ENABLE_DEBUGGER=#{build_type == :debug ? "1" : "0"}"
   }
 
   if source[:git] then
     spec.prepare_command = <<-EOS
-    BUILD_TYPE=#{get_hermes_build_type.to_s.capitalize}
+    BUILD_TYPE=#{build_type.to_s.capitalize}
 
     # Set HERMES_OVERRIDE_HERMESC_PATH if pre-built HermesC is available
     #{File.exist?(import_hermesc_file) ? "export HERMES_OVERRIDE_HERMESC_PATH=#{import_hermesc_file}" : ""}