prx 0.5.9

Praxis — agent-native Unix tools. Single binary replacing grep, cat, find, sed, diff for AI coding agents.
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use std::path::Path;

/// Compute relative path from `target` to `base`, normalized with forward slashes.
pub fn relative_path(target: &Path, base: &Path) -> Option<String> {
    let target_abs = std::fs::canonicalize(target).ok()?;
    let base_abs = std::fs::canonicalize(base).ok()?;
    target_abs
        .strip_prefix(&base_abs)
        .ok()
        .map(|p| p.to_string_lossy().replace('\\', "/"))
}

/// Check if a relative path refers to a test file.
pub fn is_test_file(rel_str: &str) -> bool {
    if rel_str.contains("/tests/") || rel_str.starts_with("tests/") {
        return true;
    }
    if rel_str.contains("__tests__/") {
        return true;
    }
    let name = Path::new(rel_str)
        .file_name()
        .and_then(|n| n.to_str())
        .unwrap_or("");
    if name.starts_with("test_") {
        return true;
    }
    if name.contains("_test.") || name.contains(".test.") || name.contains(".spec.") {
        return true;
    }
    false
}