github.com/BarDweller/libpak@v0.0.0-20230630201634-8dd5cfc15ec9/carton/build_image_dependency.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 carton
    18  
    19  import (
    20  	"fmt"
    21  	"os"
    22  	"regexp"
    23  
    24  	"github.com/BarDweller/libpak/bard"
    25  	"github.com/BarDweller/libpak/internal"
    26  )
    27  
    28  const (
    29  	ImageDependencyPattern      = `(?m)(.*build-image[\s]+=[\s]+"[^"]+:)[^"]+(".*)`
    30  	ImageDependencySubstitution = "${1}%s${2}"
    31  )
    32  
    33  type BuildImageDependency struct {
    34  	BuilderPath string
    35  	Version     string
    36  }
    37  
    38  func (i BuildImageDependency) Update(options ...Option) {
    39  	config := Config{
    40  		exitHandler: internal.NewExitHandler(),
    41  	}
    42  
    43  	for _, option := range options {
    44  		config = option(config)
    45  	}
    46  
    47  	logger := bard.NewLogger(os.Stdout)
    48  	_, _ = fmt.Fprintf(logger.TitleWriter(), "\n%s\n", bard.FormatIdentity("Build Image", i.Version))
    49  
    50  	c, err := os.ReadFile(i.BuilderPath)
    51  	if err != nil {
    52  		config.exitHandler.Error(fmt.Errorf("unable to read %s\n%w", i.BuilderPath, err))
    53  		return
    54  	}
    55  
    56  	r := regexp.MustCompile(ImageDependencyPattern)
    57  
    58  	if !r.Match(c) {
    59  		config.exitHandler.Error(fmt.Errorf("unable to match '%s'", r.String()))
    60  		return
    61  	}
    62  
    63  	s := fmt.Sprintf(ImageDependencySubstitution, i.Version)
    64  	c = r.ReplaceAll(c, []byte(s))
    65  
    66  	if err := os.WriteFile(i.BuilderPath, c, 0644); err != nil {
    67  		config.exitHandler.Error(fmt.Errorf("unable to write %s\n%w", i.BuilderPath, err))
    68  		return
    69  	}
    70  
    71  }