0.5.5

Key Changes

• Allow toggling parts of the default format without having to write one from scratch

Contributions

• @KodrAus Allow toggling parts of the default format

More Details

Builder::default_format_*

The default format can be easily tweaked by conditionally enabling/disabling parts of it in the main Builder. The API looks like:

impl Builder {
    fn default_format(&mut self) -> &mut Self;
    fn default_format_timestamp(&mut self, write: bool) -> &mut Self;
    fn default_format_module_path(&mut self, write: bool) -> &mut Self;
    fn default_format_level(&mut self, write: bool) -> &mut Self;
}

Calling default_format_* will store whether or not we want to include those parts of the log, without affecting a custom format. That means:

Builder::new()
    .format(|buf, record| { ... })
    .default_format_timestamp(false)
    .init();

Is the same as:

Builder::new()
    .format(|buf, record| { ... })
    .init();

Setting a custom format won't clobber any values passed to default_format_* methods. That means:

Builder::new()
    .default_format_timestamp(false)
    .format(|buf, record| { ... })
    .default_format()
    .init();

Is the same as:

Builder::new()
    .default_format_timestamp(false)
    .init();

Builder::from_default_env

A new from_default_env method that's a convenient way of calling from_env(env_logger::Env::default()).