findReusableDirMount method

MountRecord? findReusableDirMount({ required String nodeId, required String localDir, String? remotePath, PathFilter? filter, })

Finds a directory mount that run/exec --mount can reuse for localDir on nodeId, or null if none.

Only read-write dir mounts for the same normalized local path qualify. When remotePath is given (an explicit --mount-path), the node path must also match; when it is null (an ephemeral run), only a previously ephemeral mount qualifies (its recorded path is reused). When filter is given (e.g. a run --with whitelist), the recorded filter must match too, so changing the co-mounted set creates a fresh mount instead of reusing one with a stale filter. The most recently mounted match wins.

Implementation

MountRecord? findReusableDirMount({
  required String nodeId,
  required String localDir,
  String? remotePath,
  PathFilter? filter,
}) {
  final localAbs = p.normalize(Directory(localDir).absolute.path);
  final wantFilter = filter ?? PathFilter.empty;
  final matches = store.mounts.values.where((r) {
    if (r.isGit || r.kind != 'dir' || !r.readWrite) return false;
    if (r.nodeId != nodeId || r.localPath == null) return false;
    if (p.normalize(r.localPath!) != localAbs) return false;
    if (r.filter != wantFilter) return false;
    return remotePath != null ? r.remotePath == remotePath : r.ephemeral;
  }).toList()..sort((a, b) => b.mountedAt.compareTo(a.mountedAt));
  return matches.isEmpty ? null : matches.first;
}