use crate::debian_triple_from_rust_triple;
use crate::error::{CDResult, CargoDebError};
use std::path::Path;
use std::process::Command;
pub fn resolve(path: &Path, target: &Option<String>) -> CDResult<Vec<String>> {
let temp_folder = tempfile::tempdir()?;
let debian_folder = temp_folder.path().join("debian");
let control_file_path = debian_folder.join("control");
std::fs::create_dir_all(&debian_folder)?;
let _ = std::fs::File::create(control_file_path);
let mut args = vec!["-O"];
let libpath_arg;
if let Some(target) = target {
libpath_arg = format!("-l/usr/{}/lib", debian_triple_from_rust_triple(target));
args.push(&libpath_arg);
}
const DPKG_SHLIBDEPS_COMMAND: &str = "dpkg-shlibdeps";
let output = Command::new(DPKG_SHLIBDEPS_COMMAND)
.args(args)
.arg(path)
.current_dir(temp_folder.path())
.output()
.map_err(|e| CargoDebError::CommandFailed(e, DPKG_SHLIBDEPS_COMMAND))?;
if !output.status.success() {
return Err(CargoDebError::CommandError(
DPKG_SHLIBDEPS_COMMAND,
path.display().to_string(),
output.stderr,
));
}
log::debug!("dpkg-shlibdeps for {}: {}", path.display(), String::from_utf8_lossy(&output.stdout));
let deps = output.stdout.as_slice().split(|&c| c == b'\n')
.find_map(|line| line.strip_prefix(b"shlibs:Depends="))
.ok_or(CargoDebError::Str("Failed to find dependency specification."))?
.split(|&c| c == b',')
.filter_map(|dep| std::str::from_utf8(dep).ok())
.map(|dep| dep.trim_matches(|c: char| c.is_ascii_whitespace()))
.filter(|dep| !dep.starts_with("libgcc-") && !dep.starts_with("libgcc1"))
.map(|dep| dep.to_string())
.collect();
Ok(deps)
}
#[test]
#[cfg(target_os = "linux")]
fn resolve_test() {
let exe = std::env::current_exe().unwrap();
let deps = resolve(&exe, &None).unwrap();
assert!(deps.iter().any(|d| d.starts_with("libc")));
assert!(!deps.iter().any(|d| d.starts_with("libgcc")), "{deps:?}");
}