Dependencies related issue (Could not find a file named "pubspec.yaml" in cache)

[Roms1383]

Hi everybody,
I have a small question related to dependencies, as far as I can guess.
I've installed ffigen like dart pub global activate ffigen to use it with flutter_rust_bridge crate.
My LLVM is supposed to be correctly setup, at least no error in this direction :

brew info llvm

llvm: stable 14.0.6 (bottled), HEAD [keg-only]
Next-gen compiler infrastructure
https://llvm.org/
/opt/homebrew/Cellar/llvm/14.0.6_1 (5,851 files, 983.5MB)

Everytime I run the codegenerator lately (a.k.a flutter_rust_bridge_codegen), I end up with this error :

click for the details

export REPO_DIR="$PWD"; cd /; flutter_rust_bridge_codegen --rust-input "$REPO_DIR/native/src/api.rs" --dart-output "$REPO_DIR/lib/bridge_generated.dart" --c-output "$REPO_DIR/ios/Runner/bridge_generated.h" --c-output "$REPO_DIR/macos/Runner/bridge_generated.h"
[2022-07-28T06:42:31Z INFO lib_flutter_rust_bridge_codegen] Picked config: Opts { rust_input_path: "/Users/romain/Development/lab/cerclo-app/native/src/api.rs", dart_output_path: "/Users/romain/Development/lab/cerclo-app/lib/bridge_generated.dart", dart_decl_output_path: None, c_output_path: ["/Users/romain/Development/lab/cerclo-app/ios/Runner/bridge_generated.h", "/Users/romain/Development/lab/cerclo-app/macos/Runner/bridge_generated.h"], rust_crate_dir: "/Users/romain/Development/lab/cerclo-app/native", rust_output_path: "/Users/romain/Development/lab/cerclo-app/native/src/bridge_generated.rs", class_name: "Native", dart_format_line_length: 80, skip_add_mod_to_lib: false, llvm_path: ["/opt/homebrew/opt/llvm", "/usr/local/opt/llvm", "/usr/lib/llvm-9", "/usr/lib/llvm-10", "/usr/lib/llvm-11", "/usr/lib/llvm-12", "/usr/lib/llvm-13", "/usr/lib/llvm-14", "/usr/lib/", "/usr/lib64/", "C:/Program Files/llvm", "C:/Program Files/LLVM", "C:/msys64/mingw64"], llvm_compiler_opts: "", manifest_path: "/Users/romain/Development/lab/cerclo-app/native/Cargo.toml", dart_root: Some("/Users/romain/Development/lab/cerclo-app"), build_runner: true, block_index: BlockIndex(0) }
[2022-07-28T06:42:31Z INFO lib_flutter_rust_bridge_codegen] Phase: Parse source code to AST, then to IR
[2022-07-28T06:42:31Z INFO lib_flutter_rust_bridge_codegen] Phase: Transform IR
[2022-07-28T06:42:31Z INFO lib_flutter_rust_bridge_codegen] Phase: Generate Rust code
[2022-07-28T06:42:31Z INFO lib_flutter_rust_bridge_codegen] Phase: Generate Dart code
[2022-07-28T06:42:31Z INFO lib_flutter_rust_bridge_codegen] Phase: Other things
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::Platform - opaque (Enum is not marked with a valid #[repr(prim)] or #[repr(C)].).
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::KilometerPoint.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::API.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::Geolocation - opaque (Struct is not marked #[repr(C)] or #[repr(transparent)].).
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::wire_platform.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::wire_rust_release_mode.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::wire_get_event_stream.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::wire_update_known_location.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::wire_dispose.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::wire_Geolocation.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::new_box_autoadd_geolocation_0.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::free_WireSyncReturnStruct.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::DartPort.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::DartPostCObjectFnType.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::store_dart_post_cobject.
[2022-07-28T06:42:32Z INFO cbindgen::bindgen::parser] Take native::WireSyncReturnStruct.
[2022-07-28T06:42:32Z INFO lib_flutter_rust_bridge_codegen::commands] Running build_runner at /Users/romain/Development/lab/cerclo-app
[2022-07-28T06:42:33Z WARN lib_flutter_rust_bridge_codegen::commands] command="sh" "-c" "cd "/Users/romain/Development/lab/cerclo-app" && dart run build_runner build --delete-conflicting-outputs" stdout= stderr=Could not find a file named "pubspec.yaml" in "/Users/romain/.pub-cache/hosted/pub.dartlang.org/_fe_analyzer_shared-43.0.0".
#0 new Pubspec.load (package:pub/src/pubspec.dart:307:7)
dart-archive/ffigen#1 new Package.load (package:pub/src/package.dart:128:29)
dart-archive/ffigen#2 SystemCache.load (package:pub/src/system_cache.dart:105:20)
#540 Entrypoint._createPackageGraph (package:pub/src/entrypoint.dart:119:63)
#541 Entrypoint.packageGraph (package:pub/src/entrypoint.dart:114:54)
#542 getExecutableForCommand (package:pub/src/executable.dart:338:19)
#543 RunCommand.run (package:dartdev/src/commands/run.dart:250:32)
#530 CommandRunner.runCommand (package:args/command_runner.dart:209:27)
dart-lang/ffigen#8 DartdevRunner.runCommand (package:dartdev/dartdev.dart:231:30)
dart-archive/ffigen#9 CommandRunner.run. (package:args/command_runner.dart:119:25)
#532 new Future.sync (dart:async/future.dart:301:31)
#533 CommandRunner.run (package:args/command_runner.dart:119:14)
#534 runDartdev (package:dartdev/dartdev.dart:66:29)
#535 main (file:///opt/s/w/ir/x/w/sdk/pkg/dartdev/bin/dartdev.dart:11:9)
#536 _delayEntrypointInvocation. (dart:isolate-patch/isolate_patch.dart:293:32)
dart-archive/ffigen#15 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)

thread 'main' panicked at 'called Result::unwrap() on an Err value: Failed to run build_runner for /Users/romain/Development/lab/cerclo-app: ', /Users/romain/.cargo/registry/src/github.com-1ecc6299db9ec823/flutter_rust_bridge_codegen-1.38.1/src/main.rs:24:43
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
error: Recipe gen failed on line 8 with exit code 101

What especially caught my attention is stderr=Could not find a file named "pubspec.yaml" in "/Users/romain/.pub-cache/hosted/pub.dartlang.org/_fe_analyzer_shared-43.0.0". I've raised an issue in flutter_rust_bridge but indeed it seems more related to ffigen.
So I ended up trying dart pub global activate _fe_analyzer_shared 43.0.0 but then another dependency is missing, then another one, then another one, etc.

I'm very new to Flutter/Dart ecosystem, so could someone explain me what happens here ?

Thanks :)

[liamappelbe]

I'm not familiar with flutter_rust_bridge. It looks like you've opened a PR related to that issue after posting this issue. Is there anything for us to do in ffigen, or does your PR fix the problem?

[Roms1383]

Yes @liamappelbe it's actually fixed in this PR : turns out historically dart run ... was used, which caused this output whenever flutter pub run ... should be used instead.
Closing it, thanks for your reply !