github.com/cloudfoundry/libcfbuildpack@v1.91.23/helper/read_buildpack_yaml.go (about)

     1  /*
     2   * Copyright 2018-2020 the original author or authors.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *      https://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package helper
    18  
    19  import (
    20  	"os"
    21  
    22  	"gopkg.in/yaml.v2"
    23  )
    24  
    25  func ReadBuildpackYaml(buildpackYAMLPath string, config interface{}) error {
    26  	f, err := os.Open(buildpackYAMLPath)
    27  	if err != nil {
    28  		return err
    29  	}
    30  	fi, err := os.Stat(buildpackYAMLPath)
    31  	if err != nil {
    32  		return err
    33  	}
    34  
    35  	size := fi.Size()
    36  	if size == 0 {
    37  		return nil
    38  	}
    39  
    40  	dec := yaml.NewDecoder(f)
    41  
    42  	return dec.Decode(config)
    43  }