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package yaml
import (
"github.com/zclconf/go-cty/cty"
"github.com/zclconf/go-cty/cty/function"
)
// YAMLDecodeFunc is a cty function for decoding arbitrary YAML source code
// into a cty Value, using the ImpliedType and Unmarshal methods of the
// Standard pre-defined converter.
var YAMLDecodeFunc = function.New(&function.Spec{
Params: []function.Parameter{
{
Name: "src",
Type: cty.String,
},
},
Type: func(args []cty.Value) (cty.Type, error) {
if !args[0].IsKnown() {
return cty.DynamicPseudoType, nil
}
if args[0].IsNull() {
return cty.NilType, function.NewArgErrorf(0, "YAML source code cannot be null")
}
return Standard.ImpliedType([]byte(args[0].AsString()))
},
Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
if retType == cty.DynamicPseudoType {
return cty.DynamicVal, nil
}
return Standard.Unmarshal([]byte(args[0].AsString()), retType)
},
})
// YAMLEncodeFunc is a cty function for encoding an arbitrary cty value
// into YAML.
var YAMLEncodeFunc = function.New(&function.Spec{
Params: []function.Parameter{
{
Name: "value",
Type: cty.DynamicPseudoType,
AllowNull: true,
AllowDynamicType: true,
},
},
Type: function.StaticReturnType(cty.String),
Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
if !args[0].IsWhollyKnown() {
return cty.UnknownVal(retType), nil
}
raw, err := Standard.Marshal(args[0])
if err != nil {
return cty.NilVal, err
}
return cty.StringVal(string(raw)), nil
},
})
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