rustyroad 1.7.4

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.
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use super::error::MigrationValidationError;
use super::migration_directory::load;
use super::model::MigrationFile;
use std::fs;
use std::path::Path;

pub(super) fn discover(root: &Path) -> Result<Vec<MigrationFile>, MigrationValidationError> {
    if !root.is_dir() {
        return Err(MigrationValidationError::new(format!(
            "No migrations directory found at '{}'. Expected: ./config/database/migrations/<timestamp>-<name>/up.sql",
            root.display()
        )));
    }
    let mut entries = fs::read_dir(root)
        .map_err(|error| {
            MigrationValidationError::new(format!(
                "Could not read migrations directory '{}': {error}",
                root.display()
            ))
        })?
        .map(|entry| {
            entry.map_err(|error| {
                MigrationValidationError::new(format!(
                    "Could not inspect an entry in migrations directory '{}': {error}",
                    root.display()
                ))
            })
        })
        .collect::<Result<Vec<_>, _>>()?;
    entries.retain(|entry| entry.path().is_dir());
    entries.sort_by_key(|entry| entry.file_name());
    if entries.is_empty() {
        return Err(MigrationValidationError::new(format!(
            "No migrations found in '{}'. Validation requires at least one migration.",
            root.display()
        )));
    }
    entries.into_iter().map(load).collect()
}