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use std::ffi::OsString; use std::path::PathBuf; use std::process::{Command, Stdio}; use std::{env, str}; use anyhow::Result; use regex::Regex; pub fn get_static_libs_for_target<T: AsRef<std::ffi::OsStr>>( target: Option<T>, target_dir: &PathBuf, ) -> Result<String> { let rustc = env::var_os("RUSTC").unwrap_or_else(|| OsString::from("rustc")); let mut cmd = Command::new(rustc); cmd.arg("--color") .arg("never") .arg("--crate-type") .arg("staticlib") .arg("--print") .arg("native-static-libs") .arg("-") .arg("--out-dir") .arg(target_dir) .stdin(Stdio::null()); if let Some(t) = target { cmd.arg("--target").arg(t); } let out = cmd.output()?; log::info!("native-static-libs check {:?} {:?}", cmd, out); if out.status.success() { let re = Regex::new(r"note: native-static-libs: (.+)").unwrap(); let s = str::from_utf8(&out.stderr).unwrap(); Ok(re .captures(s) .map_or("", |cap| cap.get(1).unwrap().as_str()) .to_owned()) } else { Err(anyhow::anyhow!("cannot run {:?}", cmd)) } }