From 82b7e0f7f55a36f3b7f369478168982a9739a4bb Mon Sep 17 00:00:00 2001
From: Alex Hendrix <alex.hendrix@discordapp.com>
Date: Mon, 22 Jul 2024 10:17:58 -0500
Subject: [PATCH] [Discord] Adding release hermesc publishing

---
 .../ReactAndroid/build.gradle.kts             | 17 ++++++
 .../hermes-engine/build.gradle.kts            | 52 +++++++++++++++++++
 2 files changed, 69 insertions(+)

diff --git a/packages/react-native/ReactAndroid/build.gradle.kts b/packages/react-native/ReactAndroid/build.gradle.kts
index 49b3d845f36afe..0b4dae69a614a3 100644
--- a/packages/react-native/ReactAndroid/build.gradle.kts
+++ b/packages/react-native/ReactAndroid/build.gradle.kts
@@ -526,6 +526,17 @@ val createReactNdkLibraryZipArchiveForDiscord by
         destinationDirectory.set(layout.projectDirectory)
     }
 
+// This is the task to run to create a .zip of hermesc for CI machines
+val createHermescReleaseZipArchiveForDiscord by
+    tasks.registering(Zip::class) {
+        dependsOn(":packages:react-native:ReactAndroid:hermes-engine:buildHermescReleaseBinary")
+            archiveFileName = "hermescForDiscord.zip"
+            from(layout.projectDirectory.dir("hermes-engine/build/hermesc-release/bin"))
+
+            // Place this .zip right into our ReactAndroid directory
+            destinationDirectory = layout.projectDirectory
+    }
+
 repositories {
   // Normally RNGP will set repositories for all modules,
   // but when consumed from source, we need to re-declare
@@ -868,5 +879,11 @@ publishing {
       artifactId = "discord-rn-libs"
       artifact(tasks.named("createReactNdkLibraryZipArchiveForDiscord").get())
     }
+    create<MavenPublication>("hermescReleaseZip") {
+        groupId = "com.facebook.react"
+        version = "test"
+        artifactId = "discord-hermesc-release"
+        artifact(tasks.named("createHermescReleaseZipArchiveForDiscord").get())
+    }
   }
 }
diff --git a/packages/react-native/ReactAndroid/hermes-engine/build.gradle.kts b/packages/react-native/ReactAndroid/hermes-engine/build.gradle.kts
index 2f3d02be88d3b9..35767fb5326de0 100644
--- a/packages/react-native/ReactAndroid/hermes-engine/build.gradle.kts
+++ b/packages/react-native/ReactAndroid/hermes-engine/build.gradle.kts
@@ -59,6 +59,7 @@ val hermesDir =
     }
 val hermesBuildDir = File("$buildDir/hermes")
 val hermesCOutputBinary = File("$buildDir/hermes/bin/hermesc")
+val hermescReleaseBuildDir = File("$buildDir/hermesc-release/")
 
 // This filetree represents the file of the Hermes build that we want as input/output
 // of the buildHermesC task. Gradle will compute the hash of files in the file tree
@@ -156,6 +157,57 @@ val prepareHeadersForPrefab by
       into(prefabHeadersDir)
     }
 
+/**
+NOTE(Flewp): Taken from https://github.com/facebook/hermes/blob/9f8603b9886c957e0ccead61fe4380616188bbb4/.circleci/config.yml#L115-L123
+The idea here is to replicate building the hermesc binary historically provided by the hermes-engine-cli package.
+
+Config Step
+cmake -S hermes -B build -DHERMES_STATIC_LINK=ON -DCMAKE_BUILD_TYPE=Release \
+              -DCMAKE_INTERPROCEDURAL_OPTIMIZATION=True -DCMAKE_CXX_FLAGS=-s -DCMAKE_C_FLAGS=-s \
+              -DCMAKE_EXE_LINKER_FLAGS="-Wl,--whole-archive -lpthread -Wl,--no-whole-archive" \
+              -DHERMES_ENABLE_DEBUGGER=False
+
+Build Step
+cmake --build build --target check-hermes hermes hvm hbcdump hermesc
+*/
+val configureBuildForHermescReleaseBinary by
+    tasks.registering(Exec::class) {
+        dependsOn(unzipHermes)
+        commandLine(
+            windowsAwareCommandLine(
+                findCmakePath(cmakeVersion),
+                "-S",
+                ".",
+                "-B",
+                hermescReleaseBuildDir.toString(),
+                "-DHERMES_STATIC_LINK=ON",
+                "-DCMAKE_BUILD_TYPE=Release",
+                "-DCMAKE_INTERPROCEDURAL_OPTIMIZATION=True",
+                "-DCMAKE_CXX_FLAGS=-s",
+                "-DCMAKE_C_FLAGS=-s",
+                "-DHERMES_ENABLE_DEBUGGER=False",
+                "-DJSI_DIR=" + jsiDir.absolutePath,
+                "-DICU_FOUND=1"
+            )
+        )
+    }
+
+val buildHermescReleaseBinary by
+    tasks.registering(Exec::class) {
+        dependsOn(configureBuildForHermescReleaseBinary)
+        commandLine(
+            windowsAwareCommandLine(
+                findCmakePath(cmakeVersion),
+                "--build",
+                hermescReleaseBuildDir.toString(),
+                "--target",
+                "hermesc",
+                "-j",
+                ndkBuildJobs
+            )
+        )
+    }
+
 fun windowsAwareCommandLine(vararg commands: String): List<String> {
   val result =
       if (Os.isFamily(Os.FAMILY_WINDOWS)) {