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// 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.
// Prelude for the Starlark environment.
package main
import (
"fmt"
"go.starlark.net/starlark"
"strings"
)
// https://stackoverflow.com/questions/1976007/what-characters-are-forbidden-in-windows-and-linux-directory-names
const invalidName string = "..\\/<>:\"|?* \t\n\r\b\findex"
// Registered represents the index of registered modules.
var Registered Index
// InternIndex represents the built-in function "index".
// index(domain) initializes a new index with the given domain.
func InternIndex(_ *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple,
kwargs []starlark.Tuple) (starlark.Value, error) {
var domain string
if err := starlark.UnpackArgs("index", args, kwargs,
"domain", &domain); err != nil {
return nil, err
}
Registered.Domain = domain
return starlark.None, nil
}
// InternModule represents the built-in function "module".
// module(name, vcs, repo, dir, file) registers a new module into the
// index.
func InternModule(_ *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple,
kwargs []starlark.Tuple) (starlark.Value, error) {
var name, vcs, repo, dir, file string
if err := starlark.UnpackArgs("module", args, kwargs, "name",
&name, "vcs", &vcs, "repo", &repo, "dir", &dir, "file", &file); err != nil {
return nil, err
}
if Registered.Domain == "" {
return nil, fmt.Errorf("index not initialized")
}
if name == "" {
return nil, fmt.Errorf("module name cannot be empty")
}
if vcs == "" {
return nil, fmt.Errorf("module %q vcs cannot be empty", name)
}
if repo == "" {
return nil, fmt.Errorf("module %q repo cannot be empty", name)
}
// Check for name conditions.
if strings.Contains(invalidName, name) {
return nil, fmt.Errorf("module %q name is invalid", name)
}
if Registered.CheckModule(name) {
return nil, fmt.Errorf("module %q already exists", name)
}
var v Vcs
switch vcs {
case "git":
v = VcsGit
case "hg":
v = VcsMercurial
case "svn":
v = VcsSubversion
case "fossil":
v = VcsFossil
case "bzr":
v = VcsBazaar
default:
return nil, fmt.Errorf("unknown vcs %q", vcs)
}
Registered.AddModule(name, &Module{
Path: name,
Vcs: v,
Repo: repo,
Dir: dir,
File: file,
})
return starlark.None, nil
}
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