5 use std::io::prelude::*;
7 // The maximum length allowed for stderr files.
9 // We limit this because small files are easier to deal with than bigger files.
10 const LIMIT: usize = 320;
13 let stderr_files = stderr_files();
14 let exceeding_files = exceeding_stderr_files(stderr_files);
16 if !exceeding_files.is_empty() {
17 println!("Error: stderr files exceeding limit of {} lines:", LIMIT);
18 for path in exceeding_files {
21 std::process::exit(1);
25 fn exceeding_stderr_files(files: impl Iterator<Item = walkdir::DirEntry>) -> Vec<String> {
28 let path = file.path().to_str().expect("Could not convert path to str").to_string();
29 let linecount = count_linenumbers(&path);
30 if linecount > LIMIT {
39 fn stderr_files() -> impl Iterator<Item = walkdir::DirEntry> {
40 // We use `WalkDir` instead of `fs::read_dir` here in order to recurse into subdirectories.
41 WalkDir::new("../tests/ui")
43 .filter_map(std::result::Result::ok)
44 .filter(|f| f.path().extension() == Some(OsStr::new("stderr")))
47 fn count_linenumbers(filepath: &str) -> usize {
48 if let Ok(mut file) = File::open(filepath) {
49 let mut content = String::new();
50 file.read_to_string(&mut content).expect("Failed to read file?");
51 content.lines().count()