package/flutter-sdk-bin: new package

flutter-sdk-bin is a collection of host tools and plugins used to compile
flutter applications.

- As this is a collection of pre-compiled tools, append -bin to the end of the
  package name.

- We must set the HOME directory variable to the sdk directory or else the
  flutter dart binaries place .dart, .dart-sdk, and .flutter in ~/.

- set --clear-features, --no-analytics and --disable-telemetry first to disable
  google tracking as soon as possible.

Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
[yann.morin.1998@free.fr:
  - set FLUTTER_SDK_BIN_PUB_CACHE for other packages to make use of it
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

DEVELOPERS

@@ -33,6 +33,7 @@ F:	package/vulkan-tools/
 
 N:	Adam Duskett <adam.duskett@amarulasolutions.com>
 F:	package/depot-tools/
+F:	package/flutter-sdk-bin/
 
 N:	Adam Heinrich <adam@adamh.cz>
 F:	package/jack1/

package/Config.in.host

@@ -36,6 +36,7 @@ menu "Host utilities"
 	source "package/faketime/Config.in.host"
 	source "package/fatcat/Config.in.host"
 	source "package/firmware-utils/Config.in.host"
+	source "package/flutter-sdk-bin/Config.in.host"
 	source "package/fwup/Config.in.host"
 	source "package/genext2fs/Config.in.host"
 	source "package/genimage/Config.in.host"

package/flutter-sdk-bin/Config.in.host

@@ -0,0 +1,16 @@
+# All host rust packages should depend on this option
+config BR2_PACKAGE_HOST_FLUTTER_SDK_BIN_ARCH_SUPPORTS
+	bool
+	default y if BR2_HOSTARCH = "x86_64"
+
+config BR2_PACKAGE_HOST_FLUTTER_SDK_BIN
+	bool "host flutter-sdk-bin"
+	depends on BR2_PACKAGE_HOST_FLUTTER_SDK_BIN_ARCH_SUPPORTS
+	help
+	  Flutter is Google's SDK for crafting beautiful, fast user
+	  experiences for mobile, web, and desktop from a single
+	  codebase. Flutter works with existing code, is used by
+	  developers and organizations around the world, and is
+	  free and open source.
+
+	  https://flutter.dev/

package/flutter-sdk-bin/flutter-sdk-bin.hash

@@ -0,0 +1,3 @@
+# Locally calculated
+sha256  d9bbfbfb6fe3c72a29c1040235126edd0cd461e4e18556335fd1cf217c2e1473  flutter_linux_3.13.4-stable.tar.xz
+sha256  a598db94b6290ffbe10b5ecf911057b6a943351c727fdda9e5f2891d68700a20  LICENSE

package/flutter-sdk-bin/flutter-sdk-bin.mk

@@ -0,0 +1,98 @@
+################################################################################
+#
+# host-flutter-sdk-bin
+#
+################################################################################
+
+FLUTTER_SDK_BIN_VERSION = 3.13.4
+FLUTTER_SDK_BIN_SITE = https://storage.googleapis.com/flutter_infra_release/releases/stable/linux
+FLUTTER_SDK_BIN_SOURCE = flutter_linux_$(FLUTTER_SDK_BIN_VERSION)-stable.tar.xz
+FLUTTER_SDK_BIN_LICENSE = BSD-3-Clause
+FLUTTER_SDK_BIN_LICENSE_FILES = LICENSE
+
+HOST_FLUTTER_SDK_BIN_SDK = $(HOST_DIR)/share/flutter/sdk
+HOST_FLUTTER_SDK_BIN_DART_SDK = $(HOST_FLUTTER_SDK_BIN_SDK)/bin/cache/dart-sdk
+HOST_FLUTTER_SDK_BIN_SDK_ENGINE = $(HOST_FLUTTER_SDK_BIN_SDK)/bin/cache/artifacts/engine
+
+# We must set the home directory to the sdk directory or else flutter will
+# place .dart, .dart-sdk, and .flutter in ~/.
+HOST_FLUTTER_SDK_BIN_ENV = \
+	HOME=$(HOST_FLUTTER_SDK_BIN_SDK) \
+	PATH=$(BR_PATH):$(HOST_FLUTTER_SDK_BIN_SDK):$(HOST_FLUTTER_SDK_BIN_SDK)/bin \
+	PUB_CACHE=$(FLUTTER_SDK_BIN_PUB_CACHE)
+
+# The following config options must be ran one at a time.
+HOST_FLUTTER_SDK_BIN_CONF_OPTS = \
+	--clear-features \
+	--no-analytics \
+	--disable-telemetry \
+	--enable-custom-devices \
+	--enable-linux-desktop \
+	--no-enable-android \
+	--no-enable-fuchsia \
+	--no-enable-ios \
+	--no-enable-macos-desktop \
+	--no-enable-windows-desktop
+
+define HOST_FLUTTER_SDK_BIN_CONFIGURE_CMDS
+	$(foreach i,$(HOST_FLUTTER_SDK_BIN_CONF_OPTS),
+		$(HOST_FLUTTER_SDK_BIN_ENV) $(@D)/bin/flutter config $(i); \
+	)
+	$(HOST_FLUTTER_SDK_BIN_ENV) $(@D)/bin/dart --disable-analytics
+endef
+
+# Remove the cache, as we will run precache after setting up flutter and dart
+# with the new config options.
+define HOST_FLUTTER_SDK_BIN_BUILD_CMDS
+	mkdir -p $(HOST_FLUTTER_SDK_BIN_SDK)
+	rm -rf $(HOST_FLUTTER_SDK_BIN_SDK)/.pub-cache
+	cd $(@D) && \
+		$(HOST_FLUTTER_SDK_BIN_ENV) $(@D)/bin/flutter precache;
+endef
+
+define HOST_FLUTTER_SDK_BIN_INSTALL_CMDS
+	cp -rpdT $(@D)/. $(HOST_FLUTTER_SDK_BIN_SDK)/
+endef
+
+ifeq ($(BR2_ENABLE_RUNTIME_DEBUG),y)
+HOST_FLUTTER_SDK_BIN_SDK_ROOT = \
+	$(HOST_FLUTTER_SDK_BIN_SDK_ENGINE)/common/flutter_patched_sdk
+HOST_FLUTTER_SDK_BIN_SDK_PRODUCT = false
+else
+HOST_FLUTTER_SDK_BIN_SDK_ROOT = \
+	$(HOST_FLUTTER_SDK_BIN_SDK_ENGINE)/common/flutter_patched_sdk_product
+HOST_FLUTTER_SDK_BIN_SDK_PRODUCT = true
+endif
+
+# The Order matters.Taken from:
+# https://github.com/meta-flutter/meta-flutter/blob/kirkstone/classes/flutter-app.inc
+HOST_FLUTTER_SDK_BIN_DART_ARGS = \
+	--verbose \
+	--disable-analytics \
+	--disable-dart-dev $(HOST_FLUTTER_SDK_BIN_SDK_ENGINE)/linux-x64/frontend_server.dart.snapshot \
+	--sdk-root $(HOST_FLUTTER_SDK_BIN_SDK_ROOT) \
+	--target=flutter \
+	--no-print-incremental-dependencies \
+	-Ddart.vm.profile=false \
+	-Ddart.vm.product=$(HOST_FLUTTER_SDK_BIN_SDK_PRODUCT) \
+	--aot \
+	--tfa \
+	--packages .dart_tool/package_config.json \
+	--output-dill .dart_tool/flutter_build/*/app.dill \
+	--depfile .dart_tool/flutter_build/*/kernel_snapshot.d
+
+# Helper wrapper to run flutter when building flutter applications.
+HOST_FLUTTER_SDK_BIN_FLUTTER = \
+	$(HOST_FLUTTER_SDK_BIN_ENV) \
+	$(HOST_FLUTTER_SDK_BIN_SDK)/bin/flutter
+
+# Helper wrapper to run dart when building flutter applications.
+HOST_FLUTTER_SDK_BIN_DART_BIN = \
+	$(HOST_FLUTTER_SDK_BIN_ENV) \
+	$(HOST_FLUTTER_SDK_BIN_DART_SDK)/bin/dart \
+	$(HOST_FLUTTER_SDK_BIN_DART_ARGS)
+
+$(eval $(host-generic-package))
+
+# For target packages to locate said pub-cache
+FLUTTER_SDK_BIN_PUB_CACHE = $(HOST_FLUTTER_SDK_BIN_SDK)/.pub-cache