SHS/stdlib/filesys.go

/*   SHS: Syntactically Homogeneous Shell
 *   Copyright (C) 2019  Aidan Hahn
 *
 *   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 <https://www.gnu.org/licenses/>.
 */

package stdlib

import (
    "os"
    "gitlab.com/whom/shs/ast"
    "gitlab.com/whom/shs/log"
)

func cd(in *ast.Token, vt ast.VarTable, ft ast.FuncTable) *ast.Token {
    in = in.Eval(ft, vt, true)

    if in == nil {
        log.Log(log.ERR,
            "arguments to cd evaluated to nil!",
            "cd")
        return nil
    }

    if in.Tag == ast.LIST {
        log.Log(log.ERR, "Couldnt change dir to a list", "cd")
        return nil
    }

    err := os.Chdir(in.Value())
    if err != nil {
        log.Log(log.ERR, err.Error(), "cd")
    }
    return nil
}