Bootstrap flutter_webrtc + rust + libwebrtc toolchain (#4)

[logist322]

Synopsis

Этот PR добавляет необходимый toolchain для разработки flutter-webrtc под WIndows.

Checklist

• Created PR:
  • In draft mode
  • Name contains Draft: prefix
  • Name contains issue reference
  • Has k:: labels applied
  • Has assignee
• Documentation is updated (if required)
• Tests are updated (if required)
• Changes conform code style
• CHANGELOG entry is added (if required)
• FCM (final commit message) is posted
  • and approved
• Review is completed and changes are approved
• Before merge:
  • Milestone is set
  • PR's name and description are correct and up-to-date
  • Draft: prefix is removed
  • All temporary labels are removed

[logist322]

FCM

Bootstrap toolchain for desktop development under Windows (#5, #4)

- add `libwebrtc-sys` and `flutter-webrtc-native` Rust crates
- add `Makefile`
- bootstrap CI pipeline

[tyranron]

@logist322 one thing should be done more wisely.

[tyranron]

This should be implementent in build.rs of libwertc-sys crate and the link controlled via env var. Keeping it in Makefile only complicates stuff.

[alexlapa]

@logist322 ,

This should be implementent in build.rs of libwertc-sys crate and the link controlled via env var.

and the link controlled via env var

env var

[alexlapa]

@logist322 ,

Newline добавьте в конец. По хорошему, IDE'шка должна сама это уметь.

@tyranron ,

Вы этот .gitignore выкосили, что логично, так как крейт в вокрспейсе, и /target лежит не тут. Но тут немного другая история, мы в build.rs вот такое делаем:

    cbindgen::generate_with_config(&crate_dir, config)
        .unwrap()
        .write_to_file(format!("target/{}.hpp", package_name));

Ложить хедеры в корневой target не получается, так как переменная CARGO_BUILD_TARGET_DIR не прокидывается, по неизвестной причине, а хардкодить ../../target не хочется, но можем, если Вы за такое решение.

[tyranron]

@tyranron it's better to investigate what's the problem with CARGO_BUILD_TARGET_DIR. It should be working OK.

[alexlapa]

@tyranron ,

Make cargo export CARGO_TARGET_DIR to build.rs scripts

Build scripts are intended to have a very scoped output (just in their OUT_DIR), and they're not currently really intended to be used as installation scripts for other sorts of files. In that sense this change was never intended for build scripts.

rust-lang/cargo#7325 (comment)

А OUT_DIR это вот: /flutter-webrtc/target/debug/build/flutter-webrtc-native-621c22406cba9de9/out. Бахаю ../../target. От нее и пойдем вверх до /target.

[tyranron]

@logist322 don't use review label on GitHub. Asking regular GitHub review is enough.

And also don't use Draft: prefix. Using GitHub draft PR status is enough.