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build: Don't always expect a tests/headers directory. #637

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Merged
merged 1 commit into from
Apr 17, 2017
Merged

build: Don't always expect a tests/headers directory. #637

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14 changes: 10 additions & 4 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,13 +28,19 @@ mod testgen {
let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
let mut dst = File::create(Path::new(&out_dir).join("tests.rs")).unwrap();

println!("cargo:rerun-if-changed=tests/headers");
let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
let headers_dir = manifest_dir.join("tests").join("headers");

let entries = fs::read_dir(headers_dir)
.expect("Couldn't read headers dir")
.map(|result| result.expect("Couldn't read header file"));
let headers = match fs::read_dir(headers_dir) {
Ok(dir) => dir,
// We may not have headers directory after packaging.
Err(..) => return,
};

let entries =
headers.map(|result| result.expect("Couldn't read header file"));

println!("cargo:rerun-if-changed=tests/headers");

for entry in entries {
match entry.path().extension().and_then(OsStr::to_str) {
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