[RN][iOS]Rename BUILD_FROM_SOURCE to RCT_BUILD_HERMES_FROM_SOURCE

.circleci/config.yml

@@ -130,7 +130,7 @@ executors:
       xcode: *xcode_version
     resource_class: macos.x86.medium.gen2
     environment:
-      - BUILD_FROM_SOURCE: true
+      - RCT_BUILD_HERMES_FROM_SOURCE: true
 
 # -------------------------
 #        COMMANDS
@@ -1035,7 +1035,7 @@ jobs:
     environment:
       - HERMES_WS_DIR: *hermes_workspace_root
       - HERMES_VERSION_FILE: "packages/react-native/sdks/.hermesversion"
-      - BUILD_FROM_SOURCE: true
+      - RCT_BUILD_HERMES_FROM_SOURCE: true
     steps:
       - run:
           name: Install dependencies

packages/react-native/sdks/hermes-engine/hermes-engine.podspec

@@ -17,7 +17,7 @@ version = package['version']
 
 # sdks/.hermesversion
 hermestag_file = File.join(react_native_path, "sdks", ".hermesversion")
-build_from_source = ENV['BUILD_FROM_SOURCE'] === 'true'
+build_from_source = ENV['RCT_BUILD_HERMES_FROM_SOURCE'] === 'true'
 
 git = "https://github.com/facebook/hermes.git"
 

packages/react-native/sdks/hermes-engine/hermes-utils.rb

@@ -17,7 +17,7 @@ end
 # - To use a specific tarball, install the dependencies with:
 # `HERMES_ENGINE_TARBALL_PATH=<path_to_tarball> bundle exec pod install`
 # - To force a build from source, install the dependencies with:
-# `BUILD_FROM_SOURCE=true bundle exec pod install`
+# `RCT_BUILD_HERMES_FROM_SOURCE=true bundle exec pod install`
 # If none of the two are provided, Cocoapods will check whether there is a tarball for the current version
 # (either release or nightly). If not, it will fall back building from source (the latest commit on main).
 #