[Buildroot] [PATCH v3 06/11] package/flutter-pi: add the charset converter plugin as a menuconfig option

[Adam Duskett]

Commit 6a28738 introduces the charset_converter, which is a platform-side
implementation of the charset_converter plugin found here:
https://pub.dev/packages/charset_converter

The charset_converter plugin does the following:
```
Encode and decode charsets using platform built-in converter.
This plugin saves app package size as you don't need external charset maps or
whole libraries like iconv. This package doesn't even contain any Dart
dependencies. However, this comes with the dependency on the platform.
```

  - Remove -DBUILD_CHARSET_CONVERTER_PLUGIN=OFF as the default in
    FLUTTER_PI_CONF_OPTS.

  - Add a new Menuconfig option BR2_PACKAGE_FLUTTER_PI_CHARSET_CONVERTER_PLUGIN
    with a brief description about the new plugin and a link to the plugin that
    provides a full explination.

  - Add logic around the BR2_PACKAGE_FLUTTER_PI_CHARSET_CONVERTER_PLUGIN option
    to enable or disable the plugin if selected or not.

Signed-off-by: Adam Duskett <adam.duskett at amarulasolutions.com>
---
 package/flutter-pi/Config.in     | 7 +++++++
 package/flutter-pi/flutter-pi.mk | 7 ++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/package/flutter-pi/Config.in b/package/flutter-pi/Config.in
index ecebfad89b..45b6b4faef 100644
--- a/package/flutter-pi/Config.in
+++ b/package/flutter-pi/Config.in
@@ -23,6 +23,13 @@ if BR2_PACKAGE_FLUTTER_PI
 
 comment "plugins"
 
+config BR2_PACKAGE_FLUTTER_PI_CHARSET_CONVERTER_PLUGIN
+	bool "charset converter"
+	help
+	  Adds platform-side implementation of charset_converter plugin.
+
+	  See: https://pub.dev/packages/charset_converter
+
 config BR2_PACKAGE_FLUTTER_PI_GSTREAMER_AUDIO_PLAYER_PLUGIN
 	bool "gstreamer audio player"
 	depends on BR2_PACKAGE_HAS_LIBGLES
diff --git a/package/flutter-pi/flutter-pi.mk b/package/flutter-pi/flutter-pi.mk
index 4ec89bdfad..ab640d704a 100644
--- a/package/flutter-pi/flutter-pi.mk
+++ b/package/flutter-pi/flutter-pi.mk
@@ -27,7 +27,6 @@ FLUTTER_PI_CONF_OPTS = \
 	-DENABLE_VULKAN=OFF \
 	-DFILESYSTEM_LAYOUT=meta-flutter \
 	-DLINT_EGL_HEADERS=OFF \
-	-DBUILD_CHARSET_CONVERTER_PLUGIN=OFF \
 	-DTRY_BUILD_GSTREAMER_AUDIO_PLAYER_PLUGIN=OFF \
 	-DTRY_BUILD_GSTREAMER_VIDEO_PLAYER_PLUGIN=OFF \
 	-DTRY_ENABLE_OPENGL=OFF \
@@ -43,6 +42,12 @@ else
 FLUTTER_PI_CONF_OPTS += -DLTO=OFF
 endif
 
+ifeq ($(BR2_PACKAGE_FLUTTER_PI_CHARSET_CONVERTER_PLUGIN),y)
+FLUTTER_PI_CONF_OPTS += -DBUILD_CHARSET_CONVERTER_PLUGIN=ON
+else
+FLUTTER_PI_CONF_OPTS += -DBUILD_CHARSET_CONVERTER_PLUGIN=OFF
+endif
+
 ifeq ($(BR2_PACKAGE_FLUTTER_PI_GSTREAMER_AUDIO_PLAYER_PLUGIN),y)
 FLUTTER_PI_DEPENDENCIES += gstreamer1 gst1-plugins-base
 FLUTTER_PI_CONF_OPTS += -DBUILD_GSTREAMER_AUDIO_PLAYER_PLUGIN=ON
-- 
2.43.0