sita 0.3.0

Sita: static site generator (SSG) for Markdown and HTML
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use std::path::Path;

/// Remove a file if it exists.
///
/// Example:
///
/// ```
/// let file = PathBuf::from("example");
/// remove_file_if_exists(&file);
/// ```
///
#[allow(dead_code)]
pub fn remove_file_if_exists<P: AsRef<Path>>(path: P) -> std::io::Result<()>
{
    if path.as_ref().exists() {
        std::fs::remove_file(path)
    } else {
        Ok(())
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use std::path::PathBuf;
    use once_cell::sync::Lazy;

    pub static TMP_DIR: Lazy<PathBuf> = Lazy::new(||
        [env!("CARGO_MANIFEST_DIR"), "tmp"].iter().collect::<PathBuf>()
    );

    #[test]
    fn test_remove_file_if_exists_x_present() {
        let file = TMP_DIR.join("test_remove_file_if_exists_x_present.tmp");
        std::fs::write(&file, "").expect("write");
        assert!(file.exists());
        let x = remove_file_if_exists(&file);
        x.unwrap();
        assert!(!file.exists());
    }

    #[test]
    fn test_remove_file_if_exists_x_absent() {
        let file = TMP_DIR.join("test_remove_file_if_exists_x_absent.tmp");
        assert!(!file.exists());
        let x = remove_file_if_exists(&file);
        x.unwrap();
        assert!(!file.exists());
    }

}