Function write_if_different

crates/test/src/lib.rs:1332–1346

Returns `true` if the file was written, or `false` if the file is the same as it was already on disk.

(path: &Path, contents: impl AsRef<[u8]>)

/// Returns `true` if the file was written, or `false` if the file is the same
/// as it was already on disk.
fn write_if_different(path: &Path, contents: impl AsRef<[u8]>) -> Result<bool> {
    let contents = contents.as_ref();
    if let Ok(prev) = fs::read(path) {
        if prev == contents {
            return Ok(false);
        }
    }

    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent)
            .with_context(|| format!("failed to create directory {parent:?}"))?;
    }
    fs::write(path, contents).with_context(|| format!("failed to write {path:?}"))?;
    Ok(true)
}

impl Component {
    /// Helper to convert `RuntimeTestConfig` to a `RuntimeTestConfig<T>` and