func (env *Environment) ExpandVars(args string, pe *PlayEnv) (string, error) {
args, err := env.expandTemplates(args, pe)
if err != nil {
return "", err
}
a := []byte(args)
var buf bytes.Buffer
for {
idx := bytes.Index(a, cExprStart)
if idx == -1 {
buf.Write(a)
break
}
buf.Write(a[:idx])
in := a[idx+1:]
fin := findExprClose(in)
if fin == -1 {
return "", eUnclosedExpr
}
sexp := in[:fin+1]
val, err := lisp.EvalString(string(sexp), pe.lispScope)
if err != nil {
return "", err
}
// fmt.Printf("%s => %s\n", string(sexp), val.Inspect())
buf.WriteString(val.String())
a = in[fin+1:]
}
return buf.String(), nil
}
func ExpandVars(s Scope, args string) (string, error) {
args, err := expandTemplates(s, args)
if err != nil {
return "", err
}
a := []byte(args)
var buf bytes.Buffer
for {
idx := bytes.Index(a, cDollar)
if idx == -1 {
buf.Write(a)
break
} else if a[idx+1] == '(' {
buf.Write(a[:idx])
in := a[idx+1:]
fin := findExprClose(in)
if fin == -1 {
return "", eUnclosedExpr
}
sexp := in[:fin+1]
ls := lispInferredScope{s}
val, err := lisp.EvalString(string(sexp), ls)
if err != nil {
return "", err
}
buf.WriteString(val.String())
a = in[fin+1:]
} else {
buf.Write(a[:idx])
in := a[idx+1:]
fin := 0
for fin < len(in) {
if !varChar(rune(in[fin])) {
break
}
fin++
}
if val, ok := s.Get(string(in[:fin])); ok {
switch val := val.Read().(type) {
case int64, int:
buf.WriteString(fmt.Sprintf("%d", val))
default:
buf.WriteString(fmt.Sprintf("%s", val))
}
a = in[fin:]
} else {
return "", fmt.Errorf("Undefined variable: %s", string(in[:fin]))
}
}
}
return buf.String(), nil
}