Hermes: Use arbitrary path to hermes-runtime-darwin if ENV set

Differential Revision: D36985477

fbshipit-source-id: c423edfde064cf9d64ba41bcc0698a66d9b96f28

scripts/hermes/hermes-utils.js

@@ -158,7 +158,11 @@ function copyPodSpec() {
   );
 }
 
-function isOnAReleaseBranch() {
+function isTestingAgainstLocalHermesTarball() {
+  return 'HERMES_ENGINE_TARBALL_PATH' in process.env;
+}
+
+function isOnAReactNativeReleaseBranch() {
   try {
     let currentBranch = execSync('git rev-parse --abbrev-ref HEAD')
       .toString()
@@ -176,7 +180,7 @@ function isOnAReleaseBranch() {
   }
 }
 
-function isOnAReleaseTag() {
+function isOnAReactNativeReleaseTag() {
   try {
     // If on a named tag, this method will return the tag name.
     // If not, it will throw as the return code is not 0.
@@ -190,12 +194,17 @@ function isOnAReleaseTag() {
   return currentRemote.endsWith('facebook/react-native.git');
 }
 
-function shouldBuildHermesFromSource() {
+function isRequestingLatestCommitFromHermesMainBranch() {
   const hermesTag = readHermesTag();
+  return hermesTag === DEFAULT_HERMES_TAG;
+}
+
+function shouldBuildHermesFromSource() {
   return (
-    isOnAReleaseBranch() ||
-    isOnAReleaseTag() ||
-    hermesTag === DEFAULT_HERMES_TAG
+    !isTestingAgainstLocalHermesTarball() &&
+    (isOnAReactNativeReleaseBranch() ||
+      isOnAReactNativeReleaseTag() ||
+      isRequestingLatestCommitFromHermesMainBranch())
   );
 }
 

sdks/hermes-engine/hermes-engine.podspec

@@ -22,7 +22,10 @@ currentremote, err = Open3.capture3("git config --get remote.origin.url")
 source = {}
 git = "https://github.com/facebook/hermes.git"
 
-if version == '1000.0.0'
+if ENV.has_key?('HERMES_ENGINE_TARBALL_PATH')
+  Pod::UI.puts '[Hermes] Using pre-built Hermes binaries from local path.' if Object.const_defined?("Pod::UI")
+  source[:http] = "file://#{ENV['HERMES_ENGINE_TARBALL_PATH']}"
+elsif version == '1000.0.0'
   Pod::UI.puts '[Hermes] Hermes needs to be compiled, installing hermes-engine may take a while...'.yellow if Object.const_defined?("Pod::UI")
   source[:git] = git
   source[:commit] = `git ls-remote https://github.com/facebook/hermes main | cut -f 1`.strip