mirror of
https://github.com/google/go-jsonnet.git
synced 2025-08-08 07:17:12 +02:00
57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
/*
|
|
Copyright 2016 Google Inc. All rights reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package jsonnet
|
|
|
|
// Note: There are no garbage collection params because we're using the native Go garbage collector.
|
|
type Vm struct {
|
|
maxStack int
|
|
maxTrace int
|
|
ext vmExtMap
|
|
}
|
|
|
|
func MakeVm() *Vm {
|
|
return &Vm{
|
|
maxStack: 500,
|
|
maxTrace: 20,
|
|
}
|
|
}
|
|
|
|
func (vm *Vm) ExtVar(key string, val string) {
|
|
vm.ext[key] = vmExt{value: val, isCode: false}
|
|
}
|
|
|
|
func (vm *Vm) ExtCode(key string, val string) {
|
|
vm.ext[key] = vmExt{value: val, isCode: true}
|
|
}
|
|
|
|
func (vm *Vm) EvaluateSnippet(filename string, snippet string) (string, error) {
|
|
tokens, err := lex(filename, snippet)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
ast, err := parse(tokens)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
ast, err = desugarFile(ast)
|
|
output, err := execute(ast, vm.ext, vm.maxStack)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return output, nil
|
|
}
|