skip-if 0.1.1

Attribute macro to skip running a function that produces files
Documentation 
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mod strategies;
pub use strategies::*;

use std::path::Path;

pub use skip_if_macros::skip_if;

pub trait Strategy<O> {
    type E: std::fmt::Debug;
    /// Should we skip generating the `output`?
    /// This can take into account the hash of the arguments and the code, provided as arguments.
    fn skip(&self, output: &Path, args_hash: u64, code_hash: u64) -> bool;
    /// When the output is not skipped, this is called after processing, right before returning.
    fn callback(
        &self,
        _fn_output: &O,
        _output: &Path,
        _args_hash: u64,
        _code_hash: u64,
    ) -> Result<(), Self::E> {
        Ok(())
    }
}