github.com/paketo-buildpacks/libpak@v1.70.0/detect.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 libpak
    18  
    19  import (
    20  	"github.com/buildpacks/libcnb"
    21  
    22  	"github.com/paketo-buildpacks/libpak/bard"
    23  	"github.com/paketo-buildpacks/libpak/internal"
    24  )
    25  
    26  // Detect is called by the main function of a buildpack, for detection.
    27  func Detect(detector libcnb.Detector, options ...libcnb.Option) {
    28  	libcnb.Detect(detectDelegate{delegate: detector},
    29  		append([]libcnb.Option{
    30  			libcnb.WithExitHandler(internal.NewExitHandler()),
    31  			libcnb.WithTOMLWriter(internal.NewTOMLWriter()),
    32  		}, options...)...,
    33  	)
    34  }
    35  
    36  type detectDelegate struct {
    37  	delegate libcnb.Detector
    38  }
    39  
    40  func (d detectDelegate) Detect(context libcnb.DetectContext) (libcnb.DetectResult, error) {
    41  	result, err := d.delegate.Detect(context)
    42  	if err != nil {
    43  		err = bard.IdentifiableError{
    44  			Name:        context.Buildpack.Info.Name,
    45  			Description: context.Buildpack.Info.Version,
    46  			Err:         err,
    47  		}
    48  	}
    49  
    50  	return result, err
    51  }