chore(scripts): add build_engine script (#48)

bootstrap.sh

@@ -1,28 +0,0 @@
-#!/bin/bash
-
-# We could do something much fancier here.
-
-# Fetch dart dependencies
-cd packages/shorebird_cli
-dart pub get
-cd ../..
-
-cd packages/shorebird_code_push_api
-dart pub get
-cd ../..
-
-cd packages/shorebird_code_push_api_client
-dart pub get
-cd ../..
-
-cd updater/dart_bindings
-dart pub get
-cd ../..
-
-cd updater/dart_cli
-dart pub get
-cd ../..
-
-# And the rust side
-cd updater
-cargo check

scripts/bootstrap.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Fetch dart dependencies
+dart pub global activate very_good_cli
+very_good --analytics=false
+very_good packages get -r ./packages
+
+# And the rust side
+cd updater
+cargo check

scripts/build_engine.sh

@@ -0,0 +1,68 @@
+#! /bin/sh -x
+
+# Given a path to a Flutter engine, generate a shorebird version of it.
+# This is done by removing all the files that are not needed for the
+# Flutter engine to run.
+# Currently, only the android arm64 release version of the engine is supported.
+#
+# Usage:
+# ./build_engine <path-to-engine> <output-directory>
+
+# The path to the Flutter engine.
+ENGINE_PATH=$1
+
+# The path where the shorebird engine will be generated.
+OUTPUT_PATH=$2
+
+# Build the engine in release mode for android arm64.
+$ENGINE_PATH/src/flutter/tools/gn --android --android-cpu arm64 --runtime-mode=release
+ninja -C $ENGINE_PATH/src/out/android_release_arm64
+
+# Build the the host_release output.
+$ENGINE_PATH/src/flutter/tools/gn --runtime-mode release
+ninja -C $ENGINE_PATH/src/out/host_release
+
+# List of all files to keep.
+KEEP_FILES=(
+  "out/android_release_arm64/libflutter.so"
+  "out/android_release_arm64/arm64_v8a_release.pom"
+  "out/android_release_arm64/flutter_embedding_release.jar"
+  "out/android_release_arm64/flutter_patched_sdk/platform_strong.dill"
+  "out/android_release_arm64/clang_x64/impellerc"
+  "out/android_release_arm64/clang_x64/gen_snapshot_arm64"
+  "out/android_release_arm64/clang_x64/gen_snapshot"
+  "out/android_release_arm64/arm64_v8a_release.jar"
+  "out/android_release_arm64/flutter_embedding_release.pom"
+  "out/android_release_arm64/flutter_embedding_release.maven-metadata.xml"
+  "out/android_release_arm64/flutter_embedding_release-sources.jar"
+  "out/android_release_arm64/arm64_v8a_release.maven-metadata.xml"
+  "out/host_release/gen/const_finder.dart.snapshot"
+  "out/host_release/font-subset"
+  "flutter/prebuilts/macos-x64/dart-sdk/LICENSE"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/dartaotruntime"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/analysis_server.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/kernel-service.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/gen_kernel.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/dartdevc.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/dart2js.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/dartdev.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/kernel_worker.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/dartdev.dill"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/frontend_server.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/dart2wasm_product.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/snapshots/dds.dart.snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/dart"
+  "flutter/prebuilts/macos-x64/dart-sdk/bin/utils/gen_snapshot"
+  "flutter/prebuilts/macos-x64/dart-sdk/README"
+  "flutter/prebuilts/macos-x64/dart-sdk/version"
+  "flutter/prebuilts/macos-x64/dart-sdk/revision"
+)
+
+# Copy all files to keep to the output path.
+mkdir -p $OUTPUT_PATH
+
+for file in "${KEEP_FILES[@]}"
+do
+  mkdir -p $OUTPUT_PATH/$(dirname $file)
+  cp -r $ENGINE_PATH/src/$file $OUTPUT_PATH/$file
+done