github.com/paketo-buildpacks/libpak/v2@v2.0.0-alpha.3.0.20231023030503-8365f81de65a/generate.go (about)

     1  /*
     2   * Copyright 2023 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/v2"
    21  
    22  	"github.com/paketo-buildpacks/libpak/v2/internal"
    23  	"github.com/paketo-buildpacks/libpak/v2/log"
    24  )
    25  
    26  // Generate is called by the main function of an extension, for generation.
    27  func Generate(generator libcnb.GenerateFunc, options ...libcnb.Option) {
    28  	libcnb.Generate(generateDelegate{delegate: generator}.Generate,
    29  		libcnb.NewConfig(append([]libcnb.Option{
    30  			libcnb.WithEnvironmentWriter(internal.NewEnvironmentWriter()),
    31  			libcnb.WithExitHandler(internal.NewExitHandler()),
    32  			libcnb.WithTOMLWriter(internal.NewTOMLWriter()),
    33  		}, options...)...))
    34  }
    35  
    36  type generateDelegate struct {
    37  	delegate libcnb.GenerateFunc
    38  }
    39  
    40  func (b generateDelegate) Generate(context libcnb.GenerateContext) (libcnb.GenerateResult, error) {
    41  	result, err := b.delegate(context)
    42  	if err != nil {
    43  		err = log.IdentifiableError{
    44  			Name:        context.Extension.Info.Name,
    45  			Description: context.Extension.Info.Version,
    46  			Err:         err,
    47  		}
    48  	}
    49  
    50  	return result, err
    51  }