build_system/rustc_info.rs

   1 use std::path::{Path, PathBuf};
   2 use std::process::{Command, Stdio};
   3
   4 pub(crate) fn get_host_triple() -> String {
   5     let version_info =
   6         Command::new("rustc").stderr(Stdio::inherit()).args(&["-vV"]).output().unwrap().stdout;
   7     String::from_utf8(version_info)
   8         .unwrap()
   9         .lines()
  10         .to_owned()
  11         .find(|line| line.starts_with("host"))
  12         .unwrap()
  13         .split(":")
  14         .nth(1)
  15         .unwrap()
  16         .trim()
  17         .to_owned()
  18 }
  19
  20 pub(crate) fn get_default_sysroot() -> PathBuf {
  21     let default_sysroot = Command::new("rustc")
  22         .stderr(Stdio::inherit())
  23         .args(&["--print", "sysroot"])
  24         .output()
  25         .unwrap()
  26         .stdout;
  27     Path::new(String::from_utf8(default_sysroot).unwrap().trim()).to_owned()
  28 }
  29
  30 pub(crate) fn get_dylib_name(crate_name: &str) -> String {
  31     let dylib_name = Command::new("rustc")
  32         .stderr(Stdio::inherit())
  33         .args(&["--crate-name", crate_name, "--crate-type", "dylib", "--print", "file-names", "-"])
  34         .output()
  35         .unwrap()
  36         .stdout;
  37     let dylib_name = String::from_utf8(dylib_name).unwrap().trim().to_owned();
  38     assert!(!dylib_name.contains('\n'));
  39     assert!(dylib_name.contains(crate_name));
  40     dylib_name
  41 }