github.com/alibaba/sealer@v0.8.6-0.20220430115802-37a2bdaa8173/pkg/env/pre_process.go (about)

     1  // Copyright © 2021 Alibaba Group Holding Ltd.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package env
    16  
    17  import (
    18  	"bytes"
    19  	"text/template"
    20  )
    21  
    22  type PreProcessor interface {
    23  	Process(path string) ([]byte, error)
    24  }
    25  
    26  func (p *processor) Process(path string) ([]byte, error) {
    27  	tem, err := template.ParseFiles(path)
    28  	if err != nil {
    29  		return nil, err
    30  	}
    31  	buf := bytes.NewBuffer([]byte{})
    32  	environ := ConvertEnv(p.Spec.Env)
    33  	err = tem.Execute(buf, environ)
    34  	if err != nil {
    35  		return nil, err
    36  	}
    37  	return buf.Bytes(), nil
    38  }