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|
package cmds
import (
"errors"
"os"
"strings"
)
func Eval(cmd string) error {
args := strings.Split(cmd, " ")
switch args[0] {
case "cd":
if err := chDir(args); err != nil {
return err
}
break
case "export":
if err := export(args); err != nil {
return err
}
break
case "unset":
if len(args) == 1 || len(args) >= 3{
return errors.New("unset: usage: name")
}
os.Unsetenv(args[1])
break
case ":":
return nil
}
return nil
}
func chDir(args []string) error {
var dir string
if len(args) == 1 {
dir, _ = os.UserHomeDir()
} else {
dir = args[1]
}
return os.Chdir(dir)
}
func export(args []string) error {
if len(args) == 1 || len(args) >= 3 {
return errors.New("export: usage: name=value")
}
tmp := strings.Split(args[1], "=")
if len(tmp) != 2 {
return errors.New("export: usage: name=value")
}
return os.Setenv(tmp[0], tmp[1])
}
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