rustyroad 1.7.3

Rusty Road is a framework written in Rust that is based on Ruby on Rails. It is designed to provide the familiar conventions and ease of use of Ruby on Rails, while also taking advantage of the performance and efficiency of Rust.
Documentation 
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//! Finding the modules a preserved parent does not declare.

use super::Module;
use std::fs;
use std::path::Path;

/// Returns the modules the parent does not declare.
///
/// An unreadable parent yields nothing rather than reporting everything as missing: the
/// file was just written, so a read failure is an environment problem and not evidence
/// about its contents.
pub(super) fn missing<D>(root: &Path, modules: &[Module], declares: D) -> Vec<String>
where
    D: Fn(&str, &str) -> bool,
{
    let Ok(contents) = fs::read_to_string(root) else {
        return Vec::new();
    };

    modules
        .iter()
        .filter(|module| !declares(&contents, &module.name))
        .map(|module| module.name.clone())
        .collect()
}