Is building for web in the build.rs file supported? Has anyone tried it? #2315

CollinDietz · 2024-09-26T03:41:49Z

CollinDietz
Sep 26, 2024

Making a new project with flutter_rust_bridge_codegen create my_app and adding a build.rs like https://github.com/fzyzcjy/flutter_rust_bridge/blob/4f5cf68f56ed56df62264227d81891744c356403/frb_example/dart_build_rs/rust/build.rs works right out of the box 👍

build.rs

use lib_flutter_rust_bridge_codegen::codegen;
use lib_flutter_rust_bridge_codegen::codegen::Config;
use lib_flutter_rust_bridge_codegen::utils::logs::configure_opinionated_logging;

fn main() -> anyhow::Result<()> {
    // Uncomment the line below, if you only want to generate bindings on api directory change.
    //
    // NOTE: This accelerates the build process, but you will need to manually trigger binding
    // generation whenever there are changes to definitions outside of the api directory that it
    // depends on.
    //
    // println!("cargo:rerun-if-changed=src/api");

    // If you want to see logs
    // Alternatively, use `cargo build -vvv` (instead of `cargo build`) to see logs on screen
    configure_opinionated_logging("./logs/", true)?;

    // Execute code generator with auto-detected config
    codegen::generate(
        Config::from_config_file("../flutter_rust_bridge.yaml")?.unwrap(),
        Default::default(),
    )
}

But I see that the lib_flutter_rust_bridge_codegen includes functions callable for building for web as well which would be nice to include in that build pipeline

editing the build.rs like so

use std::path::PathBuf;

use lib_flutter_rust_bridge_codegen::build_web;
use lib_flutter_rust_bridge_codegen::codegen;
use lib_flutter_rust_bridge_codegen::codegen::Config;
use lib_flutter_rust_bridge_codegen::utils::logs::configure_opinionated_logging;

fn main() -> anyhow::Result<()> {
    // Uncomment the line below, if you only want to generate bindings on api directory change.
    //
    // NOTE: This accelerates the build process, but you will need to manually trigger binding
    // generation whenever there are changes to definitions outside of the api directory that it
    // depends on.
    //
    // println!("cargo:rerun-if-changed=src/api");

    // If you want to see logs
    // Alternatively, use `cargo build -vvv` (instead of `cargo build`) to see logs on screen
    configure_opinionated_logging("./logs/", true)?;

    // Execute code generator with auto-detected config
    codegen::generate(
        Config::from_config_file("../flutter_rust_bridge.yaml")?.unwrap(),
        Default::default(),
    )
    .and_then(|_| build_web::build(Some(PathBuf::from("../")), false, vec![]))
}

does not seem to work immediately though

I see an error like so

  --- stderr
  [INFO]: 🎯  Checking for the Wasm target...
  [INFO]: 🌀  Compiling to Wasm...
  error: "/Users/collindietz/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/Cargo.lock" does not exist, unable to build with the standard library, try:
          rustup component add rust-src --toolchain nightly-aarch64-apple-darwin
  Error: Compiling your crate to WebAssembly failed
  Caused by: Compiling your crate to WebAssembly failed
  Caused by: failed to execute `cargo build`: exited with exit status: 101
    full command: cd "rust" && "cargo" "build" "--lib" "--target" "wasm32-unknown-unknown" "-Z" "build-std=std,panic_abort"
  Unhandled exception:
  ProcessException: Bad exit code (1). If you want to see extra information, set FRB_DART_RUN_COMMAND_STDERR=1
    Command: wasm-pack build -t no-modules -d /Users/collindietz/code/flutter_rust_bridge_template/web/pkg --no-typescript --out-name rust_lib_my_app --dev rust -- -Z build-std=std,panic_abort
  #0      runCommand (package:flutter_rust_bridge/src/cli/run_command.dart:67:5)
  <asynchronous suspension>
  #1      _executeWasmPack (package:flutter_rust_bridge/src/cli/build_web/executor.dart:151:3)
  <asynchronous suspension>
  #2      executeBuildWeb (package:flutter_rust_bridge/src/cli/build_web/executor.dart:67:3)
  <asynchronous suspension>
  #3      BuildWebCommand.run (package:flutter_rust_bridge/src/cli/build_web/entrypoint.dart:18:5)
  <asynchronous suspension>
  #4      CommandRunner.runCommand (package:args/command_runner.dart:212:13)
  <asynchronous suspension>
  #5      main (file:///Users/collindietz/.pub-cache/hosted/pub.dev/flutter_rust_bridge-2.4.0/bin/flutter_rust_bridge.dart:8:3)
  <asynchronous suspension>
  Error: Fail to execute command, please see logs above for details.

which is the same error I see if I run flutter_rust_bridge_codegen build-web before I run (or after I remove the nightly) rustup component add rust-src --toolchain nightly-aarch64-apple-darwin

However running that command then rerunning the build has no effect on the results.

My first guess is just that I simply can't do this for some reason, but wasn't sure if people had done it and there was an example I could reference, or if I had messed something up

Full output from build

cargo build 
   Compiling rust_lib_my_app v0.1.0 (/Users/collindietz/code/flutter_rust_bridge_template/rust)
error: failed to run custom build command for `rust_lib_my_app v0.1.0 (/Users/collindietz/code/flutter_rust_bridge_template/rust)`

Caused by:
  process didn't exit successfully: `/Users/collindietz/code/flutter_rust_bridge_template/rust/target/debug/build/rust_lib_my_app-7896704a08816897/build-script-build` (exit status: 1)
  --- stdout
  [2024-09-26T03:38:57.712Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/config/config_parser.rs:51] Found config file ../flutter_rust_bridge.yaml
  [2024-09-26T03:38:57.713Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/mod.rs:23] config=Config { base_dir: Some(".."), rust_input: Some("crate::api"), dart_output: Some("lib/src/rust"), c_output: None, duplicated_c_output: None, rust_root: Some("rust/"), rust_output: None, dart_entrypoint_class_name: None, dart_format_line_length: None, dart_preamble: None, rust_preamble: None, dart_enums_style: None, add_mod_to_lib: None, llvm_path: None, llvm_compiler_opts: None, dart_root: None, build_runner: None, extra_headers: None, web: None, deps_check: None, dart3: None, full_dep: None, local: None, default_external_library_loader_web_prefix: None, dart_type_rename: None, enable_lifetime: None, type_64bit_int: None, default_dart_async: None, stop_on_error: None, dump: None, dump_all: None } meta_config=MetaConfig { watch: false }
  [2024-09-26T03:38:57.713Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/config/internal_config_parser/mod.rs:33] InternalConfig.parse base_dir=".."
  [2024-09-26T03:38:57.930Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/mod.rs:26] internal_config=InternalConfig { controller: ControllerInternalConfig { watch: false, watching_paths: ["/Users/collindietz/code/flutter_rust_bridge_template/rust/src"], exclude_paths: ["/Users/collindietz/code/flutter_rust_bridge_template/rust/src/frb_generated.rs"], max_count: None }, preparer: PreparerInternalConfig { dart_root: "/Users/collindietz/code/flutter_rust_bridge_template", deps_check: true, needs_ffigen: false }, parser: ParserInternalConfig { hir: ParserHirInternalConfig { rust_input_namespace_pack: RustInputNamespacePack { rust_input_namespace_prefixes: [Namespace { joined_path: "crate::api" }], rust_output_path_namespace: Namespace { joined_path: "crate::frb_generated" } }, rust_crate_dir: "/Users/collindietz/code/flutter_rust_bridge_template/rust", third_party_crate_names: [] }, mir: ParserMirInternalConfig { rust_input_namespace_pack: RustInputNamespacePack { rust_input_namespace_prefixes: [Namespace { joined_path: "crate::api" }], rust_output_path_namespace: Namespace { joined_path: "crate::frb_generated" } }, force_codec_mode_pack: Some(CodecModePack { dart2rust: Pde, rust2dart: Pde }), default_stream_sink_codec: Sse, default_rust_opaque_codec: Moi, stop_on_error: false, enable_lifetime: false, type_64bit_int: false, default_dart_async: true } }, generator: GeneratorInternalConfig { api_dart: GeneratorApiDartInternalConfig { dart_enums_style: true, dart3: true, dart_decl_base_output_path: "/Users/collindietz/code/flutter_rust_bridge_template/lib/src/rust", dart_impl_output_path: TargetOrCommonMap { common: "/Users/collindietz/code/flutter_rust_bridge_template/lib/src/rust/frb_generated.dart", io: "/Users/collindietz/code/flutter_rust_bridge_template/lib/src/rust/frb_generated.io.dart", web: "/Users/collindietz/code/flutter_rust_bridge_template/lib/src/rust/frb_generated.web.dart" }, dart_entrypoint_class_name: "RustLib", dart_preamble: "", dart_type_rename: {} }, wire: GeneratorWireInternalConfig { dart: GeneratorWireDartInternalConfig { has_ffigen: false, web_enabled: true, 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:/msys64/mingw64"], llvm_compiler_opts: "", dart_root: "/Users/collindietz/code/flutter_rust_bridge_template", extra_headers: "", dart_impl_output_path: TargetOrCommonMap { common: "/Users/collindietz/code/flutter_rust_bridge_template/lib/src/rust/frb_generated.dart", io: "/Users/collindietz/code/flutter_rust_bridge_template/lib/src/rust/frb_generated.io.dart", web: "/Users/collindietz/code/flutter_rust_bridge_template/lib/src/rust/frb_generated.web.dart" }, dart_output_class_name_pack: DartOutputClassNamePack { entrypoint_class_name: "RustLib", api_class_name: "RustLibApi", api_impl_class_name: "RustLibApiImpl", api_impl_platform_class_name: "RustLibApiImplPlatform", wire_class_name: "RustLibWire", wasm_module_name: "RustLibWasmModule" }, default_external_library_loader: GeneratorWireDartDefaultExternalLibraryLoaderInternalConfig { stem: "rust_lib_my_app", io_directory: "rust/target/release/", web_prefix: "pkg/" }, c_symbol_prefix: "frbgen_my_app_" }, rust: GeneratorWireRustInternalConfig { rust_crate_dir: "/Users/collindietz/code/flutter_rust_bridge_template/rust", web_enabled: true, rust_output_path: "/Users/collindietz/code/flutter_rust_bridge_template/rust/src/frb_generated.rs", c_symbol_prefix: "frbgen_my_app_", has_ffigen: false, default_stream_sink_codec: Sse, default_rust_opaque_codec: Moi, rust_preamble: "" }, c: GeneratorWireCInternalConfig { enable: false, rust_crate_dir: "/Users/collindietz/code/flutter_rust_bridge_template/rust", rust_output_path: "/Users/collindietz/code/flutter_rust_bridge_template/rust/src/frb_generated.rs", c_output_path: None, c_symbol_prefix: "frbgen_my_app_" } } }, polisher: PolisherInternalConfig { duplicated_c_output_path: [], dart_format_line_length: 80, add_mod_to_lib: true, build_runner: true, web_enabled: true, dart_root: "/Users/collindietz/code/flutter_rust_bridge_template", rust_crate_dir: "/Users/collindietz/code/flutter_rust_bridge_template/rust", rust_output_path: "/Users/collindietz/code/flutter_rust_bridge_template/rust/src/frb_generated.rs", c_output_path: None, enable_auto_upgrade: true }, dumper: DumperInternalConfig { dump_contents: [], dump_directory: "/Users/collindietz/code/flutter_rust_bridge_template/rust/target/frb_dump" } }
  [2024-09-26T03:38:57.931Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/utils/dart_repository/dart_repo.rs:21] Guessing toolchain the runner is run into
  [2024-09-26T03:38:57.931Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/command_runner.rs:129] execute command: bin=sh args="-c \"flutter\" \"--version\"" current_dir=None cmd="sh" "-c" "\"flutter\" \"--version\""
  [2024-09-26T03:38:58.273Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/command_runner.rs:140] command="sh" "-c" "\"flutter\" \"--version\"" stdout=Flutter 3.24.3 • channel stable • https://github.com/flutter/flutter.git
  Framework • revision 2663184aa7 (2 weeks ago) • 2024-09-11 16:27:48 -0500
  Engine • revision 36335019a8
  Tools • Dart 3.5.3 • DevTools 2.37.3
   stderr=
  [2024-09-26T03:38:58.273Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/cargo_expand/mod.rs:26] run_cargo_expand manifest_dir=/Users/collindietz/code/flutter_rust_bridge_template/rust rust_crate_dir="/Users/collindietz/code/flutter_rust_bridge_template/rust"
  [2024-09-26T03:38:58.273Z WARN /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/cargo_expand/pseudo.rs:15] Skip cargo-expand on "/Users/collindietz/code/flutter_rust_bridge_template/rust", because cargo is already running and would block cargo-expand. This might cause errors if your api contains macros or complex mods.
  [2024-09-26T03:38:58.283Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/mod.rs:139] parse_function function name: "greet"
  [2024-09-26T03:38:58.283Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/lifetime.rs:36] parse_function_lifetime name=greet inputs_lifetimes=[[]] output_lifetimes=[] ans=ParseFunctionLifetimeOutput { needs_extend_lifetime_per_arg: [false] }
  [2024-09-26T03:38:58.283Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/ty/ty.rs:12] TypeParserWithContext.parse_type ty=String ans=Delegate(String)
  [2024-09-26T03:38:58.283Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/ty/ty.rs:12] TypeParserWithContext.parse_type ty=String ans=Delegate(String)
  [2024-09-26T03:38:58.283Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/mod.rs:139] parse_function function name: "greet_again"
  [2024-09-26T03:38:58.283Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/lifetime.rs:36] parse_function_lifetime name=greet_again inputs_lifetimes=[[]] output_lifetimes=[] ans=ParseFunctionLifetimeOutput { needs_extend_lifetime_per_arg: [false] }
  [2024-09-26T03:38:58.283Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/ty/ty.rs:12] TypeParserWithContext.parse_type ty=String ans=Delegate(String)
  [2024-09-26T03:38:58.283Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/ty/ty.rs:12] TypeParserWithContext.parse_type ty=String ans=Delegate(String)
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/mod.rs:139] parse_function function name: "init_app"
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/lifetime.rs:36] parse_function_lifetime name=init_app inputs_lifetimes=[] output_lifetimes=[] ans=ParseFunctionLifetimeOutput { needs_extend_lifetime_per_arg: [] }
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/mod.rs:139] parse_function function name: "greet"
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/lifetime.rs:36] parse_function_lifetime name=greet inputs_lifetimes=[[]] output_lifetimes=[] ans=ParseFunctionLifetimeOutput { needs_extend_lifetime_per_arg: [false] }
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/ty/ty.rs:12] TypeParserWithContext.parse_type ty=String ans=Delegate(String)
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/ty/ty.rs:12] TypeParserWithContext.parse_type ty=String ans=Delegate(String)
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/mod.rs:139] parse_function function name: "greet_again"
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/lifetime.rs:36] parse_function_lifetime name=greet_again inputs_lifetimes=[[]] output_lifetimes=[] ans=ParseFunctionLifetimeOutput { needs_extend_lifetime_per_arg: [false] }
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/ty/ty.rs:12] TypeParserWithContext.parse_type ty=String ans=Delegate(String)
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/ty/ty.rs:12] TypeParserWithContext.parse_type ty=String ans=Delegate(String)
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/mod.rs:139] parse_function function name: "init_app"
  [2024-09-26T03:38:58.284Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/codegen/parser/mir/parser/function/real/lifetime.rs:36] parse_function_lifetime name=init_app inputs_lifetimes=[] output_lifetimes=[] ans=ParseFunctionLifetimeOutput { needs_extend_lifetime_per_arg: [] }
  [2024-09-26T03:38:58.288Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/dart_fix.rs:10] execute dart_fix
  [2024-09-26T03:38:58.288Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/command_runner.rs:129] execute command: bin=sh args="-c \"dart\" \"fix\" \"--apply\"" current_dir=Some("/Users/collindietz/code/flutter_rust_bridge_template") cmd=cd "/Users/collindietz/code/flutter_rust_bridge_template" && "sh" "-c" "\"dart\" \"fix\" \"--apply\""
  [2024-09-26T03:38:59.519Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/command_runner.rs:140] command=cd "/Users/collindietz/code/flutter_rust_bridge_template" && "sh" "-c" "\"dart\" \"fix\" \"--apply\"" stdout=Computing fixes in flutter_rust_bridge_template...
  Nothing to fix!
   stderr=
  [2024-09-26T03:38:59.519Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/dart_format.rs:23] execute dart_format paths=["lib/src/rust/frb_generated.io.dart", "lib/src/rust/frb_generated.web.dart", "lib/src/rust/frb_generated.dart", "lib/src/rust/api/simple.dart"] line_length=80
  [2024-09-26T03:38:59.519Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/command_runner.rs:129] execute command: bin=sh args="-c \"dart\" \"format\" \"--line-length\" \"80\" \"lib/src/rust/frb_generated.io.dart\" \"lib/src/rust/frb_generated.web.dart\" \"lib/src/rust/frb_generated.dart\" \"lib/src/rust/api/simple.dart\"" current_dir=Some("/Users/collindietz/code/flutter_rust_bridge_template") cmd=cd "/Users/collindietz/code/flutter_rust_bridge_template" && "sh" "-c" "\"dart\" \"format\" \"--line-length\" \"80\" \"lib/src/rust/frb_generated.io.dart\" \"lib/src/rust/frb_generated.web.dart\" \"lib/src/rust/frb_generated.dart\" \"lib/src/rust/api/simple.dart\""
  [2024-09-26T03:38:59.777Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/command_runner.rs:140] command=cd "/Users/collindietz/code/flutter_rust_bridge_template" && "sh" "-c" "\"dart\" \"format\" \"--line-length\" \"80\" \"lib/src/rust/frb_generated.io.dart\" \"lib/src/rust/frb_generated.web.dart\" \"lib/src/rust/frb_generated.dart\" \"lib/src/rust/api/simple.dart\"" stdout=Formatted lib/src/rust/frb_generated.io.dart
  Formatted lib/src/rust/frb_generated.web.dart
  Formatted lib/src/rust/frb_generated.dart
  Formatted lib/src/rust/api/simple.dart
  Formatted 4 files (4 changed) in 0.14 seconds.
   stderr=
  [2024-09-26T03:38:59.778Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/format_rust.rs:9] execute format_rust paths=["src/frb_generated.rs"]
  [2024-09-26T03:38:59.778Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/command_runner.rs:129] execute command: bin=sh args="-c \"rustfmt\" \"--edition\" \"2018\" \"src/frb_generated.rs\"" current_dir=Some("/Users/collindietz/code/flutter_rust_bridge_template/rust") cmd=cd "/Users/collindietz/code/flutter_rust_bridge_template/rust" && "sh" "-c" "\"rustfmt\" \"--edition\" \"2018\" \"src/frb_generated.rs\""
  [2024-09-26T03:38:59.833Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/commands/command_runner.rs:140] command=cd "/Users/collindietz/code/flutter_rust_bridge_template/rust" && "sh" "-c" "\"rustfmt\" \"--edition\" \"2018\" \"src/frb_generated.rs\"" stdout= stderr=
  [2024-09-26T03:38:59.833Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/utils/dart_repository/dart_repo.rs:21] Guessing toolchain the runner is run into
  [2024-09-26T03:38:59.834Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/utils/dart_repository/dart_repo.rs:68] Checking presence of flutter_rust_bridge in dependencies at "/Users/collindietz/code/flutter_rust_bridge_template"
  [2024-09-26T03:38:59.834Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/utils/dart_repository/dart_repo.rs:93] Checking presence of flutter_rust_bridge in dependencies at "/Users/collindietz/code/flutter_rust_bridge_template"
  Done!
  [2024-09-26T03:38:59.837Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/build_web/mod.rs:23] build dart_root="/Users/collindietz/code/flutter_rust_bridge_template" args=[]
  [2024-09-26T03:38:59.837Z DEBUG /Users/collindietz/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.4.0/src/library/utils/dart_repository/dart_repo.rs:21] Guessing toolchain the runner is run into
  > which wasm-pack (pwd: null, env: null)
  /Users/collindietz/.cargo/bin/wasm-pack
  > cargo read-manifest (pwd: rust, env: null)
  > wasm-pack build -t no-modules -d /Users/collindietz/code/flutter_rust_bridge_template/web/pkg --no-typescript --out-name rust_lib_my_app --dev rust -- -Z build-std=std,panic_abort (pwd: null, env: {RUSTUP_TOOLCHAIN: nightly, RUSTFLAGS: -C target-feature=+atomics,+bulk-memory,+mutable-globals})

  --- stderr
  [INFO]: 🎯  Checking for the Wasm target...
  [INFO]: 🌀  Compiling to Wasm...
  error: "/Users/collindietz/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/Cargo.lock" does not exist, unable to build with the standard library, try:
          rustup component add rust-src --toolchain nightly-aarch64-apple-darwin
  Error: Compiling your crate to WebAssembly failed
  Caused by: Compiling your crate to WebAssembly failed
  Caused by: failed to execute `cargo build`: exited with exit status: 101
    full command: cd "rust" && "cargo" "build" "--lib" "--target" "wasm32-unknown-unknown" "-Z" "build-std=std,panic_abort"
  Unhandled exception:
  ProcessException: Bad exit code (1). If you want to see extra information, set FRB_DART_RUN_COMMAND_STDERR=1
    Command: wasm-pack build -t no-modules -d /Users/collindietz/code/flutter_rust_bridge_template/web/pkg --no-typescript --out-name rust_lib_my_app --dev rust -- -Z build-std=std,panic_abort
  #0      runCommand (package:flutter_rust_bridge/src/cli/run_command.dart:67:5)
  <asynchronous suspension>
  #1      _executeWasmPack (package:flutter_rust_bridge/src/cli/build_web/executor.dart:151:3)
  <asynchronous suspension>
  #2      executeBuildWeb (package:flutter_rust_bridge/src/cli/build_web/executor.dart:67:3)
  <asynchronous suspension>
  #3      BuildWebCommand.run (package:flutter_rust_bridge/src/cli/build_web/entrypoint.dart:18:5)
  <asynchronous suspension>
  #4      CommandRunner.runCommand (package:args/command_runner.dart:212:13)
  <asynchronous suspension>
  #5      main (file:///Users/collindietz/.pub-cache/hosted/pub.dev/flutter_rust_bridge-2.4.0/bin/flutter_rust_bridge.dart:8:3)
  <asynchronous suspension>
  Error: Fail to execute command, please see logs above for details.

fzyzcjy · 2024-09-26T04:52:33Z

fzyzcjy
Sep 26, 2024
Maintainer

I personally suggest not to use the build.rs for such complex scenarios, since when in build.rs, currently we do not expand macros (to avoid cargo's deadlock).

And, for your question, when you call build-web in build.rs, it seems that build-web will call another cargo build, which calls build.rs, which deadlocks.

2 replies

CollinDietz Sep 26, 2024
Author

And, for your question, when you call build-web in build.rs, it seems that build-web will call another cargo build, which calls build.rs, which deadlocks.

Ah nice

Sounds good I'll make some higher level thing to chain it all together

Thanks for the quick answer!

fzyzcjy Sep 26, 2024
Maintainer

You are welcome!

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Is building for web in the build.rs file supported? Has anyone tried it? #2315

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Is building for web in the build.rs file supported? Has anyone tried it? #2315

CollinDietz Sep 26, 2024

Replies: 1 comment · 2 replies

fzyzcjy Sep 26, 2024 Maintainer

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fzyzcjy
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