// Copyright Nicolas Paul (2023)
//
// * Nicolas Paul
//
// This software is a computer program whose purpose is to allow the hosting
// and sharing of Go modules using a personal domain.
//
// This software is governed by the CeCILL license under French law and
// abiding by the rules of distribution of free software.  You can  use,
// modify and/ or redistribute the software under the terms of the CeCILL
// license as circulated by CEA, CNRS and INRIA at the following URL
// "http://www.cecill.info".
//
// As a counterpart to the access to the source code and  rights to copy,
// modify and redistribute granted by the license, users are provided only
// with a limited warranty  and the software's author,  the holder of the
// economic rights,  and the successive licensors  have only  limited
// liability.
//
// In this respect, the user's attention is drawn to the risks associated
// with loading,  using,  modifying and/or developing or reproducing the
// software by the user in light of its specific status of free software,
// that may mean  that it is complicated to manipulate,  and  that  also
// therefore means  that it is reserved for developers  and  experienced
// professionals having in-depth computer knowledge. Users are therefore
// encouraged to load and test the software's suitability as regards their
// requirements in conditions enabling the security of their systems and/or
// data to be ensured and,  more generally, to use and operate it in the
// same conditions as regards security.
//
// The fact that you are presently reading this means that you have had
// knowledge of the CeCILL license and that you accept its terms.

package hg

import (
	_ "embed"
	"go.nc0.fr/svgu/pkg/config/lib/prelude"
	"go.starlark.net/starlark"
	"go.starlark.net/starlarkstruct"
	"sync"
)

var (
	once = sync.Once{}
	hg   = starlark.StringDict{}
	//go:embed hg.star
	hgFile string
	hgErr  error
)

// LoadHgModule loads the Mercurial module.
func LoadHgModule(t *starlark.Thread) (starlark.StringDict, error) {
	once.Do(func() {
		env := starlark.StringDict{
			"module": starlark.NewBuiltin("module",
				prelude.InternModule),
			"make_module": starlark.NewBuiltin("mod",
				starlarkstruct.MakeModule),
		}
		hg, hgErr = starlark.ExecFile(t, "hg.star", hgFile, env)
	})

	return hg, hgErr
}