Struct Composer 

pub struct Composer;

Composer package manager adapter.

Trait Implementations

impl PackageManager for Composer

fn detect(&self, path: &Path) -> bool

The manifest, not the lockfile: a project that has never installed still has a composer.json, and reporting the manager it uses is useful before there is any bloat to report.

fn bloat_dirs(&self, path: &Path) -> Vec<BloatDir>

vendor/, but only when it is Composer’s own.

Bundler configured with bundle config set path vendor/bundle puts its gems inside the same directory. Deleting vendor/ in such a repository would take them with it under a proof that says nothing about them, and no composer install puts them back. Rare enough to decline rather than model: Bundler still claims vendor/bundle and prunes it under its own lockfile.

fn enforce_lockfile(&self, path: &Path, policy: EnforcePolicy) -> Result<()>

composer validate is the read-only side: it writes nothing and fails when composer.lock is no longer in sync with composer.json, which is exactly the question a prune has to answer. --no-check-publish drops the “this package could not be published” complaints (missing description, license) and --no-check-all the constraint-style nags — neither has anything to do with whether the lockfile can rebuild vendor/.

The write side is composer update --no-install, which re-resolves and writes the lockfile without touching vendor/.

fn name(&self) -> &'static str

Human-readable name for this adapter (e.g., “npm”, “pnpm”, “uv”).

fn restore(&self, path: &Path, timeout: Duration) -> Result<()>

Restore dependencies from the lockfile (for dev-prune restore).

fn lockfiles(&self) -> &'static [&'static str]

The file this manager rebuilds its bloat directory from.

fn restore_named( &self, project_path: &Path, dir_name: &str, runtime: Option<&str>, timeout: Duration, ) -> Result<()>

PackageManager::restore, told the name the pruned directory had.

fn runtime_tag(&self, project_path: &Path, dir_name: &str) -> Option<String>

The language runtime a bloat directory is built against, recorded at prune time.

fn drift(&self, project_path: &Path) -> Vec<DriftReport>

Installed-but-unrecorded packages, as data instead of a refusal.

fn opt_in(&self) -> bool

Whether this adapter is inert until the user enables it in settings.