Function detect_drupal_web_root

src/composer.rs:827–862

Detect whether the project is a Drupal project and resolve the web root. Returns `Some(web_root)` if one of the canonical Drupal core packages is listed in `require` or `require-dev`, and we can determine the web root. Web-root resolution order: 1. `extra.drupal-scaffold.locations.web-root` in `composer.json`. 2. Filesystem fallback: the first of `web/`, `docroot/`, `public/`, `html/` that conta

(
    workspace_root: &Path,
    package: &ComposerPackage,
)

/// 2. Filesystem fallback: the first of `web/`, `docroot/`, `public/`,
///    `html/` that contains `core/lib/Drupal.php`.
pub(crate) fn detect_drupal_web_root(
    workspace_root: &Path,
    package: &ComposerPackage,
) -> Option<PathBuf> {
    const DRUPAL_PACKAGES: &[&str] = &["drupal/core", "drupal/core-recommended", "drupal/core-dev"];

    let is_drupal = DRUPAL_PACKAGES
        .iter()
        .any(|pkg| package.require.contains_key(*pkg) || package.require_dev.contains_key(*pkg));

    if !is_drupal {
        return None;
    }

    // 1. Read from extra.drupal-scaffold.locations.web-root
    if let Some(ComposerPackageExtra::Object(extra_map)) = &package.extra
        && let Some(scaffold) = extra_map.get("drupal-scaffold")
        && let Some(web_root_str) = scaffold
            .get("locations")
            .and_then(|l| l.get("web-root"))
            .and_then(|v| v.as_str())
    {
        let path = workspace_root.join(web_root_str.trim_end_matches('/'));
        return Some(path);
    }

    // 2. Filesystem fallback: find which common dir contains core/lib/Drupal.php
    for candidate in &["web", "docroot", "public", "html"] {
        let path = workspace_root.join(candidate);
        if path.join("core/lib/Drupal.php").exists() {
            return Some(path);
        }
    }

    None
}

#[cfg(test)]
mod tests {