Unnamed repository; edit this file 'description' to name the repository.
| -rw-r--r-- | crates/proc-macro-test/build.rs | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/crates/proc-macro-test/build.rs b/crates/proc-macro-test/build.rs index 767a790437..c6bd5160d4 100644 --- a/crates/proc-macro-test/build.rs +++ b/crates/proc-macro-test/build.rs @@ -12,14 +12,43 @@ use std::{ use cargo_metadata::Message; fn main() { + println!("cargo:rerun-if-changed=imp"); + let out_dir = env::var_os("OUT_DIR").unwrap(); let out_dir = Path::new(&out_dir); let name = "proc-macro-test-impl"; let version = "0.0.0"; + + let imp_dir = std::env::current_dir().unwrap().join("imp"); + + let staging_dir = out_dir.join("proc-macro-test-imp-staging"); + // this'll error out if the staging dir didn't previously exist. using + // `std::fs::exists` would suffer from TOCTOU so just do our best to + // wipe it and ignore errors. + let _ = std::fs::remove_dir_all(&staging_dir); + + println!("Creating {}", staging_dir.display()); + std::fs::create_dir_all(&staging_dir).unwrap(); + + let src_dir = staging_dir.join("src"); + println!("Creating {}", src_dir.display()); + std::fs::create_dir_all(src_dir).unwrap(); + + for item_els in [&["Cargo.toml"][..], &["src", "lib.rs"]] { + let mut src = imp_dir.clone(); + let mut dst = staging_dir.clone(); + for el in item_els { + src.push(el); + dst.push(el); + } + println!("Copying {} to {}", src.display(), dst.display()); + std::fs::copy(src, dst).unwrap(); + } + let target_dir = out_dir.join("target"); let output = Command::new(toolchain::cargo()) - .current_dir("imp") + .current_dir(&staging_dir) .args(&["build", "-p", "proc-macro-test-impl", "--message-format", "json"]) // Explicit override the target directory to avoid using the same one which the parent // cargo is using, or we'll deadlock. @@ -29,7 +58,14 @@ fn main() { .arg(&target_dir) .output() .unwrap(); - assert!(output.status.success()); + if !output.status.success() { + println!("proc-macro-test-impl failed to build"); + println!("============ stdout ============"); + println!("{}", String::from_utf8_lossy(&output.stdout)); + println!("============ stderr ============"); + println!("{}", String::from_utf8_lossy(&output.stderr)); + panic!("proc-macro-test-impl failed to build"); + } let mut artifact_path = None; for message in Message::parse_stream(output.stdout.as_slice()) { |