)

// dirInModule locates the directory that would hold the package named by the given path,
// if it were in the module with module path mpath and root mdir.
// If path is syntactically not within mpath,
// or if mdir is a local file tree (isLocal == true) and the directory
// that would hold path is in a sub-module (covered by a go.mod below mdir),
// dirInModule returns "", false, nil.
//

		return match
	}

	root, isLocal, err := fetch(ctx, m)
	if err != nil {
		match.Errs = []error{err}
		return match
	}

	dir, haveGoFiles, err := dirInModule(pattern, m.Path, root, isLocal)
	if err != nil {
		match.Errs = []error{err}
		return match
	}
	if haveGoFiles {
		if _, _, err := scanDir(root, dir, tags); err != imports.ErrNoGo {

			prefix := mod.Path
			if MainModules.Contains(mod.Path) {
				prefix = MainModules.PathPrefix(module.Version{Path: mod.Path})
			}
			for _, root := range roots {
				if _, ok, err := dirInModule(pattern, prefix, root, isLocal); err != nil {
					m.AddError(err)
				} else if ok {
					m.Pkgs = []string{pattern}
				}
			}
			return m
		}
	}

	var mainModuleMatches []module.Version

					// within module "std" either.
					return "", errPkgIsBuiltin
				}
				return pkg, nil
			}

			pkg := pathpkg.Join(mainModulePrefix, suffix)
			if _, ok, err := dirInModule(pkg, mainModulePrefix, modRoot, true); err != nil {
				return "", err
			} else if !ok {
				// This main module could contain the directory but doesn't. Other main