cargo-truce 0.49.14

Build tool for truce audio plugins (CLAP, VST3, VST2, LV2, AU v2, AU v3, AAX, and a standalone host binary)
Documentation 
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//! `cargo truce log-stream-au` - tail AU v3 appex logs live.
//!
//! macOS-only. Wraps `/usr/bin/log stream` with a predicate matching
//! the AU v3 Swift wrapper's subsystem (`com.truce.au3`). Forward-only
//! - does not surface historical entries; for those use `log show
//! --last <duration>` directly.

use crate::Res;

fn print_help() {
    eprintln!(
        "\
Usage: cargo truce log-stream-au

Tail AU v3 appex logs live. Wraps `/usr/bin/log stream` with a
predicate matching the AU v3 Swift wrapper's subsystem
(`com.truce.au3`). Forward-only - does not surface historical
entries. For those, run `log show --last <duration>` directly.

macOS-only.

Options:
  -h, --help       Show this message."
    );
}

#[cfg(not(target_os = "macos"))]
pub(crate) fn cmd_log_stream_au(args: &[String]) -> Res {
    if args.iter().any(|a| a == "--help" || a == "-h") {
        print_help();
        return Ok(());
    }
    Err(
        "`cargo truce log-stream-au` is macOS-only - it wraps Apple's \
         `/usr/bin/log stream`, which doesn't exist on Linux or Windows. \
         AU v3 itself is also macOS-only."
            .into(),
    )
}

#[cfg(target_os = "macos")]
pub(crate) fn cmd_log_stream_au(args: &[String]) -> Res {
    use std::process::Command;

    if args.iter().any(|a| a == "--help" || a == "-h") {
        print_help();
        return Ok(());
    }
    if let Some(unknown) = args.iter().find(|a| !a.is_empty()) {
        return Err(format!("unknown flag: {unknown}").into());
    }

    eprintln!("Streaming AU v3 appex logs (Ctrl-C to stop)...\n");
    let status = Command::new("/usr/bin/log")
        .args([
            "stream",
            "--predicate",
            "subsystem == \"com.truce.au3\"",
            "--style",
            "compact",
            "--level",
            "debug",
        ])
        .status()?;
    if !status.success() {
        return Err("log stream exited with error".into());
    }
    Ok(())
}