boltffi_cli 0.27.0

CLI for BoltFFI - generate Swift, Kotlin, and WASM bindings from Rust
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use std::path::PathBuf;

use boltffi_backend::{CoverageMode, GeneratedOutput};
use boltffi_bindgen::generate::{Generation, GenerationError};
use boltffi_bindgen::target::Target;

use crate::cargo::Cargo;
use crate::cli::{CliError, Result};
use crate::config::Config;

use super::{GenerateOptions, GenerateTarget};

pub fn run_ir_generation(config: &Config, options: &GenerateOptions) -> Result<()> {
    match &options.target {
        GenerateTarget::Python => generate_python(config, options),
        other => Err(CliError::CommandFailed {
            command: format!(
                "--ir is only available for python, not {}",
                target_label(other)
            ),
            status: None,
        }),
    }
}

fn generate_python(config: &Config, options: &GenerateOptions) -> Result<()> {
    if !config.is_python_enabled() {
        return Err(CliError::CommandFailed {
            command: "targets.python.enabled = false".to_string(),
            status: None,
        });
    }

    let cargo_args = config
        .cargo_args_for_command("generate")
        .into_iter()
        .chain(options.cargo_args.iter().cloned())
        .collect::<Vec<_>>();
    let cargo = Cargo::current(&cargo_args)?;
    let metadata = cargo.metadata()?;
    let cargo_manifest_path = cargo.manifest_path()?;
    let package_selector =
        cargo.effective_package_selector(config, &metadata, &cargo_manifest_path);
    let package = metadata.find_package(&cargo_manifest_path, package_selector.as_deref())?;
    let library_target =
        package.resolve_library_target(&config.crate_artifact_name(), &cargo_manifest_path)?;
    let output_directory = options
        .output
        .clone()
        .unwrap_or_else(|| config.python_output());

    write_python(
        config,
        output_directory,
        package.manifest_path.clone(),
        library_target.name.clone(),
        cargo.probe_command_arguments(),
    )
}

pub fn run_python_generation(
    config: &Config,
    output: Option<PathBuf>,
    manifest_path: PathBuf,
    artifact_name: String,
    cargo_args: Vec<String>,
) -> Result<()> {
    if !config.is_python_enabled() {
        return Err(CliError::CommandFailed {
            command: "targets.python.enabled = false".to_string(),
            status: None,
        });
    }

    let output_directory = output.unwrap_or_else(|| config.python_output());

    write_python(
        config,
        output_directory,
        manifest_path,
        artifact_name,
        cargo_args,
    )
}

fn write_python(
    config: &Config,
    output_directory: PathBuf,
    manifest_path: PathBuf,
    artifact_name: String,
    cargo_args: Vec<String>,
) -> Result<()> {
    Generation::new(manifest_path)
        .cargo_args(cargo_args)
        .coverage_mode(CoverageMode::Partial)
        .python_module_name(config.python_module_name())
        .python_distribution_name(config.package.name.clone())
        .python_package_version(config.package_version())
        .python_native_library(artifact_name)
        .render(Target::Python)
        .and_then(|output| {
            print_coverage(&output);
            Generation::write_output(output, &output_directory)
        })
        .map(drop)
        .map_err(generation_error)
}

fn print_coverage(output: &GeneratedOutput) {
    let unsupported = output.coverage().unsupported();
    if unsupported.is_empty() {
        return;
    }

    eprintln!("python generation skipped unsupported declarations");
    eprintln!("{:<12} {:<48} reason", "kind", "name");
    unsupported.iter().for_each(|item| {
        eprintln!(
            "{:<12} {:<48} {}",
            item.declaration().kind(),
            item.declaration().name(),
            item.reason()
        );
    });
}

fn generation_error(error: GenerationError) -> CliError {
    CliError::CommandFailed {
        command: format!("generate python: {error}"),
        status: None,
    }
}

fn target_label(target: &GenerateTarget) -> &'static str {
    match target {
        GenerateTarget::Swift => "swift",
        GenerateTarget::Kotlin => "kotlin",
        GenerateTarget::KotlinMultiplatform => "kmp",
        GenerateTarget::Java => "java",
        GenerateTarget::Header => "header",
        GenerateTarget::Typescript => "typescript",
        GenerateTarget::Dart => "dart",
        GenerateTarget::Python => "python",
        GenerateTarget::CSharp => "csharp",
        GenerateTarget::All => "all",
    }
}