refactor: move alr.sh parsing to pkg

pkg/alrsh/alrsh.go

@@ -0,0 +1,168 @@
+// ALR - Any Linux Repository
+// Copyright (C) 2025 The ALR Authors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package alrsh
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strconv"
+	"strings"
+
+	"mvdan.cc/sh/v3/expand"
+	"mvdan.cc/sh/v3/interp"
+	"mvdan.cc/sh/v3/syntax"
+
+	"gitea.plemya-x.ru/Plemya-x/ALR/internal/cpu"
+	"gitea.plemya-x.ru/Plemya-x/ALR/internal/distro"
+	"gitea.plemya-x.ru/Plemya-x/ALR/internal/shutils/decoder"
+	"gitea.plemya-x.ru/Plemya-x/ALR/internal/shutils/handlers"
+	"gitea.plemya-x.ru/Plemya-x/ALR/internal/shutils/helpers"
+	"gitea.plemya-x.ru/Plemya-x/ALR/pkg/types"
+)
+
+type ALRSh struct {
+	file *syntax.File
+	path string
+}
+
+func createBuildEnvVars(info *distro.OSRelease, dirs types.Directories) []string {
+	env := os.Environ()
+
+	env = append(
+		env,
+		"DISTRO_NAME="+info.Name,
+		"DISTRO_PRETTY_NAME="+info.PrettyName,
+		"DISTRO_ID="+info.ID,
+		"DISTRO_VERSION_ID="+info.VersionID,
+		"DISTRO_ID_LIKE="+strings.Join(info.Like, " "),
+		"ARCH="+cpu.Arch(),
+		"NCPU="+strconv.Itoa(runtime.NumCPU()),
+	)
+
+	if dirs.ScriptDir != "" {
+		env = append(env, "scriptdir="+dirs.ScriptDir)
+	}
+
+	if dirs.PkgDir != "" {
+		env = append(env, "pkgdir="+dirs.PkgDir)
+	}
+
+	if dirs.SrcDir != "" {
+		env = append(env, "srcdir="+dirs.SrcDir)
+	}
+
+	return env
+}
+
+func (s *ALRSh) ParseBuildVars(ctx context.Context, info *distro.OSRelease, packages []string) (string, []*types.BuildVars, error) {
+	varsOfPackages := []*types.BuildVars{}
+
+	scriptDir := filepath.Dir(s.path)
+	env := createBuildEnvVars(info, types.Directories{ScriptDir: scriptDir})
+
+	runner, err := interp.New(
+		interp.Env(expand.ListEnviron(env...)),                               // Устанавливаем окружение
+		interp.StdIO(os.Stdin, os.Stderr, os.Stderr),                         // Устанавливаем стандартный ввод-вывод
+		interp.ExecHandler(helpers.Restricted.ExecHandler(handlers.NopExec)), // Ограничиваем выполнение
+		interp.ReadDirHandler2(handlers.RestrictedReadDir(scriptDir)),        // Ограничиваем чтение директорий
+		interp.StatHandler(handlers.RestrictedStat(scriptDir)),               // Ограничиваем доступ к статистике файлов
+		interp.OpenHandler(handlers.RestrictedOpen(scriptDir)),               // Ограничиваем открытие файлов
+		interp.Dir(scriptDir),
+	)
+	if err != nil {
+		return "", nil, err
+	}
+
+	err = runner.Run(ctx, s.file) // Запускаем скрипт
+	if err != nil {
+		return "", nil, err
+	}
+
+	dec := decoder.New(info, runner) // Создаём новый декодер
+
+	type Packages struct {
+		BasePkgName string   `sh:"basepkg_name"`
+		Names       []string `sh:"name"`
+	}
+
+	var pkgs Packages
+	err = dec.DecodeVars(&pkgs)
+	if err != nil {
+		return "", nil, err
+	}
+
+	if len(pkgs.Names) == 0 {
+		return "", nil, errors.New("package name is missing")
+	}
+
+	var vars types.BuildVars
+
+	if len(pkgs.Names) == 1 {
+		err = dec.DecodeVars(&vars)
+		if err != nil {
+			return "", nil, err
+		}
+		varsOfPackages = append(varsOfPackages, &vars)
+
+		return vars.Name, varsOfPackages, nil
+	}
+
+	var pkgNames []string
+
+	if len(packages) != 0 {
+		pkgNames = packages
+	} else {
+		pkgNames = pkgs.Names
+	}
+
+	for _, pkgName := range pkgNames {
+		var preVars types.BuildVarsPre
+		funcName := fmt.Sprintf("meta_%s", pkgName)
+		meta, ok := dec.GetFuncWithSubshell(funcName)
+		if !ok {
+			return "", nil, fmt.Errorf("func %s is missing", funcName)
+		}
+		r, err := meta(ctx)
+		if err != nil {
+			return "", nil, err
+		}
+		d := decoder.New(&distro.OSRelease{}, r)
+		err = d.DecodeVars(&preVars)
+		if err != nil {
+			return "", nil, err
+		}
+		vars := preVars.ToBuildVars()
+		vars.Name = pkgName
+		vars.Base = pkgs.BasePkgName
+
+		varsOfPackages = append(varsOfPackages, &vars)
+	}
+
+	return pkgs.BasePkgName, varsOfPackages, nil
+}
+
+func (a *ALRSh) Path() string {
+	return a.path
+}
+
+func (a *ALRSh) File() *syntax.File {
+	return a.file
+}