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//! `bless` updates the reference files in the repo with changed output files
//! from the last test run.
use crate::cargo_clippy_path;
use std::ffi::OsStr;
use std::fs;
use std::path::{Path, PathBuf};
use std::sync::LazyLock;
use walkdir::{DirEntry, WalkDir};
static CLIPPY_BUILD_TIME: LazyLock<Option<std::time::SystemTime>> =
LazyLock::new(|| cargo_clippy_path().metadata().ok()?.modified().ok());
/// # Panics
///
/// Panics if the path to a test file is broken
pub fn bless(ignore_timestamp: bool) {
let extensions = ["stdout", "stderr", "fixed"].map(OsStr::new);
WalkDir::new(build_dir())
.into_iter()
.map(Result::unwrap)
.filter(|entry| entry.path().extension().map_or(false, |ext| extensions.contains(&ext)))
.for_each(|entry| update_reference_file(&entry, ignore_timestamp));
}
fn update_reference_file(test_output_entry: &DirEntry, ignore_timestamp: bool) {
let test_output_path = test_output_entry.path();
let reference_file_name = test_output_entry.file_name().to_str().unwrap().replace(".stage-id", "");
let reference_file_path = Path::new("tests")
.join(test_output_path.strip_prefix(build_dir()).unwrap())
.with_file_name(reference_file_name);
// If the test output was not updated since the last clippy build, it may be outdated
if !ignore_timestamp && !updated_since_clippy_build(test_output_entry).unwrap_or(true) {
return;
}
let test_output_file = fs::read(&test_output_path).expect("Unable to read test output file");
let reference_file = fs::read(&reference_file_path).unwrap_or_default();
if test_output_file != reference_file {
// If a test run caused an output file to change, update the reference file
println!("updating {}", reference_file_path.display());
fs::copy(test_output_path, &reference_file_path).expect("Could not update reference file");
}
}
fn updated_since_clippy_build(entry: &DirEntry) -> Option<bool> {
let clippy_build_time = (*CLIPPY_BUILD_TIME)?;
let modified = entry.metadata().ok()?.modified().ok()?;
Some(modified >= clippy_build_time)
}
fn build_dir() -> PathBuf {
let mut path = std::env::current_exe().unwrap();
path.set_file_name("test");
path
}
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