Function collect_psr4_php_files

src/classmap_scanner.rs:1803–1857

Collect all `.php` file paths under a PSR-4 directory, computing the expected FQN for each file from its relative path. Paths and expected FQNs are appended to `out`. No file content is read. Files whose path appears in `skip_paths` are excluded.

(
    base_path: &Path,
    namespace_prefix: &str,
    vendor_dir_paths: &[PathBuf],
    skip_paths: &HashSet<PathBuf>,
    out: &mut Vec<(PathBuf, String)>,
)

///
/// Files whose path appears in `skip_paths` are excluded.
fn collect_psr4_php_files(
    base_path: &Path,
    namespace_prefix: &str,
    vendor_dir_paths: &[PathBuf],
    skip_paths: &HashSet<PathBuf>,
    out: &mut Vec<(PathBuf, String)>,
) {
    use ignore::WalkBuilder;

    let vendor_paths: Vec<PathBuf> = vendor_dir_paths.to_vec();

    let walker = WalkBuilder::new(base_path)
        .git_ignore(true)
        .git_global(true)
        .git_exclude(true)
        .hidden(true)
        .parents(true)
        .ignore(true)
        .filter_entry(move |entry| {
            if entry.file_type().is_some_and(|ft| ft.is_dir()) {
                let path = entry.path();
                if vendor_paths.iter().any(|vp| vp == path) {
                    return false;
                }
            }
            true
        })
        .build();

    for entry in walker.flatten() {
        let path = entry.path();
        if path.is_file() && path.extension().is_some_and(|ext| ext == "php") {
            let owned = path.to_path_buf();
            if skip_paths.contains(&owned) {
                continue;
            }
            // Compute expected FQN from the file path relative to the
            // PSR-4 base directory.
            let relative = match path.strip_prefix(base_path) {
                Ok(rel) => rel,
                Err(_) => continue,
            };
            let relative_str = relative.to_string_lossy();
            // Strip the `.php` extension
            let stem = match relative_str.strip_suffix(".php") {
                Some(s) => s,
                None => continue,
            };
            // Convert path separators to namespace separators
            let expected_fqn = format!("{}{}", namespace_prefix, stem.replace('/', "\\"));

            out.push((owned, expected_fqn));
        }
    }
}

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