/
bake.go
696 lines (594 loc) · 24.4 KB
/
bake.go
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package commands
import (
"crypto/sha256"
"encoding/hex"
"errors"
"fmt"
"io"
"log"
"os"
"path"
"path/filepath"
"slices"
"strings"
"time"
"github.com/go-git/go-billy/v5"
"github.com/pivotal-cf/jhanda"
"github.com/pivotal-cf/kiln/internal/baking"
"github.com/pivotal-cf/kiln/internal/builder"
"github.com/pivotal-cf/kiln/internal/commands/flags"
"github.com/pivotal-cf/kiln/internal/helper"
"github.com/pivotal-cf/kiln/pkg/bake"
"github.com/pivotal-cf/kiln/pkg/cargo"
)
//counterfeiter:generate -o ./fakes/interpolator.go --fake-name Interpolator . interpolator
type interpolator interface {
Interpolate(input builder.InterpolateInput, templateName string, templateYAML []byte) ([]byte, error)
}
//counterfeiter:generate -o ./fakes/tile_writer.go --fake-name TileWriter . tileWriter
type tileWriter interface {
Write(generatedMetadataContents []byte, input builder.WriteInput) error
}
//counterfeiter:generate -o ./fakes/from_directories.go --fake-name FromDirectories . fromDirectories
type fromDirectories interface {
FromDirectories(directories []string) (map[string]any, error)
}
//counterfeiter:generate -o ./fakes/parse_metadata_templates.go --fake-name MetadataTemplatesParser . metadataTemplatesParser
type metadataTemplatesParser interface {
ParseMetadataTemplates(directories []string, variables map[string]any) (map[string]any, error)
}
//counterfeiter:generate -o ./fakes/stemcell_service.go --fake-name StemcellService . stemcellService
type stemcellService interface {
fromDirectories
FromKilnfile(path string) (stemcell map[string]any, err error)
FromTarball(path string) (stemcell any, err error)
}
//counterfeiter:generate -o ./fakes/template_variables_service.go --fake-name TemplateVariablesService . templateVariablesService
type templateVariablesService interface {
FromPathsAndPairs(paths []string, pairs []string) (templateVariables map[string]any, err error)
}
//counterfeiter:generate -o ./fakes/icon_service.go --fake-name IconService . iconService
type iconService interface {
Encode(path string) (encodedIcon string, err error)
}
//counterfeiter:generate -o ./fakes/metadata_service.go --fake-name MetadataService . metadataService
type metadataService interface {
Read(path string) (metadata []byte, err error)
}
//counterfeiter:generate -o ./fakes/checksummer.go --fake-name Checksummer . checksummer
type checksummer interface {
Sum(path string) error
}
//counterfeiter:generate -o ./fakes/FileInfo.go --fake-name FileInfo . FileInfo
type FileInfo interface {
os.FileInfo
}
//counterfeiter:generate -o ./fakes/file.go --fake-name File . File
type File interface {
io.ReadCloser
billy.File
}
//counterfeiter:generate -o ./fakes/filesystem.go --fake-name FileSystem . FileSystem
type FileSystem interface {
billy.Basic
billy.Dir
}
//counterfeiter:generate -o ./fakes/fetch.go --fake-name Fetch . fetch
type fetch interface {
jhanda.Command
}
func NewBake(fs billy.Filesystem, releasesService baking.ReleasesService, outLogger *log.Logger, errLogger *log.Logger, fetch fetch) Bake {
filesystem := helper.NewFilesystem()
zipper := builder.NewZipper()
interpolator := builder.NewInterpolator()
tileWriter := builder.NewTileWriter(filesystem, &zipper, errLogger)
stemcellManifestReader := builder.NewStemcellManifestReader(filesystem)
stemcellService := baking.NewStemcellService(errLogger, stemcellManifestReader)
templateVariablesService := baking.NewTemplateVariablesService(fs)
iconService := baking.NewIconService(errLogger)
metadataService := baking.NewMetadataService()
checksummer := baking.NewChecksummer(errLogger)
return Bake{
interpolator: interpolator,
tileWriter: tileWriter,
checksummer: checksummer,
outLogger: outLogger,
errLogger: errLogger,
templateVariables: templateVariablesService,
releases: releasesService,
stemcell: stemcellService,
icon: iconService,
writeBakeRecord: writeBakeRecord,
loadKilnfile: cargo.ReadKilnfile,
metadata: metadataService,
boshVariables: builder.MetadataPartsDirectoryReader{},
forms: builder.MetadataPartsDirectoryReader{},
instanceGroups: builder.MetadataPartsDirectoryReader{},
jobs: builder.MetadataPartsDirectoryReader{},
properties: builder.MetadataPartsDirectoryReader{},
runtimeConfigs: builder.MetadataPartsDirectoryReader{},
fetcher: fetch,
fs: fs,
homeDir: func() (string, error) {
return os.UserHomeDir()
},
}
}
// WithKilnfileFunc overrides the funcion used to parse the Kilnfile.
// It is for setting up tests.
func (bake Bake) WithKilnfileFunc(fn func(string) (cargo.Kilnfile, error)) Bake {
bake.loadKilnfile = fn
return bake
}
type writeBakeRecordSignature func(string, string, string, []byte) error
type Bake struct {
interpolator interpolator
checksummer checksummer
tileWriter tileWriter
outLogger *log.Logger
errLogger *log.Logger
templateVariables templateVariablesService
stemcell stemcellService
releases fromDirectories
loadKilnfile func(string) (cargo.Kilnfile, error)
writeBakeRecord writeBakeRecordSignature
KilnVersion string
boshVariables,
forms,
instanceGroups,
jobs,
properties,
runtimeConfigs metadataTemplatesParser
fs FileSystem
homeDir flags.HomeDirFunc
icon iconService
metadata metadataService
fetcher jhanda.Command
Options BakeOptions
}
type BakeOptions struct {
flags.Standard
flags.FetchBakeOptions
Metadata string `short:"m" long:"metadata" default:"base.yml" description:"path to the metadata file"`
ReleaseDirectories []string `short:"rd" long:"releases-directory" default:"releases" description:"path to a directory containing release tarballs"`
FormDirectories []string `short:"f" long:"forms-directory" default:"forms" description:"path to a directory containing forms"`
IconPath string `short:"i" long:"icon" default:"icon.png" description:"path to icon file"`
InstanceGroupDirectories []string `short:"ig" long:"instance-groups-directory" default:"instance_groups" description:"path to a directory containing instance groups"`
JobDirectories []string `short:"j" long:"jobs-directory" default:"jobs" description:"path to a directory containing jobs"`
MigrationDirectories []string `short:"md" long:"migrations-directory" default:"migrations" description:"path to a directory containing migrations"`
PropertyDirectories []string `short:"pd" long:"properties-directory" default:"properties" description:"path to a directory containing property blueprints"`
RuntimeConfigDirectories []string `short:"rcd" long:"runtime-configs-directory" default:"runtime_configs" description:"path to a directory containing runtime configs"`
BOSHVariableDirectories []string `short:"vd" long:"bosh-variables-directory" default:"bosh_variables" description:"path to a directory containing BOSH variables"`
StemcellTarball string `short:"st" long:"stemcell-tarball" description:"deprecated -- path to a stemcell tarball (NOTE: mutually exclusive with --kilnfile)"`
StemcellsDirectories []string `short:"sd" long:"stemcells-directory" description:"path to a directory containing stemcells (NOTE: mutually exclusive with --kilnfile or --stemcell-tarball)"`
EmbedPaths []string `short:"e" long:"embed" description:"path to files to include in the tile /embed directory"`
OutputFile string `short:"o" long:"output-file" description:"path to where the tile will be output"`
MetadataOnly bool `short:"mo" long:"metadata-only" description:"don't build a tile, output the metadata to stdout"`
Sha256 bool ` long:"sha256" description:"calculates a SHA256 checksum of the output file"`
StubReleases bool `short:"sr" long:"stub-releases" description:"skips importing release tarballs into the tile"`
Version string `short:"v" long:"version" description:"version of the tile"`
SkipFetchReleases bool `short:"sfr" long:"skip-fetch" description:"skips the automatic release fetch for all release directories" alias:"skip-fetch-directories"`
TileName string `short:"t" long:"tile-name" description:"select the bake_configuration matching the tile-name from the Kilnfile"`
IsFinal bool `long:"final" description:"this flag causes build metadata to be written to bake_records"`
}
func NewBakeWithInterfaces(interpolator interpolator, tileWriter tileWriter, outLogger *log.Logger, errLogger *log.Logger, templateVariablesService templateVariablesService, boshVariablesService metadataTemplatesParser, releasesService fromDirectories, stemcellService stemcellService, formsService metadataTemplatesParser, instanceGroupsService metadataTemplatesParser, jobsService metadataTemplatesParser, propertiesService metadataTemplatesParser, runtimeConfigsService metadataTemplatesParser, iconService iconService, metadataService metadataService, checksummer checksummer, fetcher jhanda.Command, fs FileSystem, homeDir flags.HomeDirFunc, writeBakeRecordFn writeBakeRecordSignature) Bake {
return Bake{
interpolator: interpolator,
tileWriter: tileWriter,
checksummer: checksummer,
outLogger: outLogger,
errLogger: errLogger,
templateVariables: templateVariablesService,
releases: releasesService,
stemcell: stemcellService,
icon: iconService,
metadata: metadataService,
writeBakeRecord: writeBakeRecordFn,
loadKilnfile: cargo.ReadKilnfile,
boshVariables: boshVariablesService,
forms: formsService,
instanceGroups: instanceGroupsService,
jobs: jobsService,
properties: propertiesService,
runtimeConfigs: runtimeConfigsService,
fetcher: fetcher,
fs: fs,
homeDir: homeDir,
}
}
var _ writeBakeRecordSignature = writeBakeRecord
func writeBakeRecord(kilnVersion, tileFilepath, metadataFilepath string, productTemplate []byte) error {
tileSum, err := tileChecksum(tileFilepath)
if err != nil {
return fmt.Errorf("failed to calculate checksum: %w", err)
}
b, err := bake.NewRecord(tileSum, productTemplate)
if err != nil {
return fmt.Errorf("failed to create bake record: %w", err)
}
b.KilnVersion = kilnVersion
abs, err := filepath.Abs(metadataFilepath)
if err != nil {
return fmt.Errorf("failed to find tile root for bake records: %w", err)
}
tileDir := filepath.Dir(abs)
b, err = b.SetTileDirectory(tileDir)
if err != nil {
return err
}
if err := b.WriteFile(tileDir); err != nil {
return fmt.Errorf("failed to write bake record: %w", err)
}
return nil
}
func tileChecksum(tileFilepath string) (string, error) {
f, err := os.Open(tileFilepath)
if err != nil {
return "", fmt.Errorf("failed to open tile file: %w", err)
}
defer closeAndIgnoreError(f)
s := sha256.New()
if _, err := io.Copy(s, f); err != nil {
return "", fmt.Errorf("failed to calculate checksum: %w", err)
}
return hex.EncodeToString(s.Sum(nil)), nil
}
func shouldGenerateTileFileName(b *Bake, args []string) bool {
return b.Options.OutputFile == "" &&
!b.Options.MetadataOnly &&
!flags.IsSet("o", "output-file", args)
}
func shouldReadVersionFile(b *Bake, args []string) bool {
return b.Options.Version == "" && !flags.IsSet("v", "version", args)
}
func shouldNotUseDefaultKilnfileFlag(args []string) bool {
return (flags.IsSet("st", "stemcell-tarball", args) || flags.IsSet("sd", "stemcells-directory", args)) &&
!flags.IsSet("kf", "kilnfile", args)
}
func variablesDirPresent(fs flags.FileSystem) bool {
file, err := fs.Stat("variables")
return err == nil && file != nil
}
func getVariablesFilePaths(fs flags.FileSystem) ([]string, error) {
files, err := fs.ReadDir("variables")
if err != nil {
return nil, err
}
var varFiles []string
for _, file := range files {
if strings.HasSuffix(file.Name(), ".yml") {
varFiles = append(varFiles, "variables/"+file.Name())
}
}
return varFiles, nil
}
func (b *Bake) loadFlags(args []string) error {
_, err := flags.LoadWithDefaultFilePaths(&b.Options, args, b.fs.Stat)
if err != nil {
return err
}
// setup default creds
if !b.Options.MetadataOnly {
added, err := addDefaultCredentials(b)
if err != nil {
return err
}
if added {
b.outLogger.Println("Setting default credentials from ~/.kiln/credentials.yml. (hint: --variable-file overrides this default. --variable overrides both.)")
} else {
b.outLogger.Println("Warning: No credentials file found at ~/.kiln/credentials.yml. (hint: create this file to set default credentials. see --help for more info.)")
}
}
// setup default tile variables
if variablesDirPresent(b.fs) {
variablesFilePaths, err := getVariablesFilePaths(b.fs)
if err == nil {
if noTileVariablesFileAlreadySet(b, variablesFilePaths) {
setADefaultTileVariablesFile(b, variablesFilePaths)
}
}
}
if shouldReadVersionFile(b, args) {
fileInfo, err := b.fs.Stat("version")
// TODO: test this
if fileInfo != nil && err == nil {
var file File
file, err = b.fs.Open(fileInfo.Name())
if err != nil && file == nil {
return err
}
defer closeAndIgnoreError(file)
versionBuf := make([]byte, fileInfo.Size())
_, _ = file.Read(versionBuf)
b.Options.Version = strings.TrimSpace(string(versionBuf))
}
}
if shouldGenerateTileFileName(b, args) {
b.Options.OutputFile = "tile.pivotal"
if b.Options.Version != "" {
b.Options.OutputFile = "tile-" + b.Options.Version + ".pivotal"
}
}
if shouldNotUseDefaultKilnfileFlag(args) {
b.Options.Standard.Kilnfile = ""
}
return nil
}
func addDefaultCredentials(b *Bake) (addedDefault bool, err error) {
home, err := b.homeDir()
if err != nil {
return false, err
}
defaultCredPath := filepath.Join(home, ".kiln", "credentials.yml")
if file, err := b.fs.Stat(defaultCredPath); err == nil && file != nil {
b.Options.VariableFiles = append(b.Options.VariableFiles, defaultCredPath)
return true, nil
}
return false, nil
}
func setADefaultTileVariablesFile(b *Bake, variablesFilePath []string) {
for _, filePath := range variablesFilePath {
if strings.Contains(filePath, "ert") {
variablesFilePath = []string{filePath}
break
}
}
b.Options.VariableFiles = append(variablesFilePath, b.Options.VariableFiles...)
}
func noTileVariablesFileAlreadySet(b *Bake, variablesFilePaths []string) bool {
for _, filePath := range variablesFilePaths {
for _, varFile := range b.Options.VariableFiles {
if path.Base(varFile) == path.Base(filePath) &&
path.Dir(varFile) == path.Dir(filePath) {
return false
}
}
}
return true
}
func (b Bake) Execute(args []string) error {
err := b.loadFlags(args)
if err != nil {
return err
}
if !b.Options.SkipFetchReleases && !b.Options.StubReleases {
for _, releaseDir := range b.Options.ReleaseDirectories {
fetchOptions := struct {
flags.Standard
flags.FetchBakeOptions
FetchReleaseDir
}{
b.Options.Standard,
b.Options.FetchBakeOptions,
FetchReleaseDir{releaseDir},
}
fetchArgs := flags.Args(fetchOptions)
err = b.fetcher.Execute(fetchArgs)
if err != nil {
return err
}
}
}
// TODO: Remove check after deprecation of --stemcell-tarball
if b.Options.StemcellTarball != "" {
b.errLogger.Println("warning: --stemcell-tarball is being deprecated in favor of --stemcells-directory")
}
if err := BakeArgumentsFromKilnfileConfiguration(&b.Options, b.loadKilnfile); err != nil {
return fmt.Errorf("failed to load bake configuration from Kilnfile: %w", err)
}
templateVariables, err := b.templateVariables.FromPathsAndPairs(b.Options.VariableFiles, b.Options.Variables)
if err != nil {
return fmt.Errorf("failed to parse template variables: %s", err)
}
if b.Options.TileName != "" {
if tileNameVariable, ok := templateVariables[builder.TileNameVariable]; ok && tileNameVariable != b.Options.TileName {
return fmt.Errorf("tile-name flag value %q does not match tile_name variable %q", b.Options.TileName, tileNameVariable)
}
templateVariables[builder.TileNameVariable] = b.Options.TileName
}
releaseManifests, err := b.releases.FromDirectories(b.Options.ReleaseDirectories)
if err != nil {
return fmt.Errorf("failed to parse releases: %s", err)
}
var stemcellManifests map[string]any
var stemcellManifest any
if b.Options.StemcellTarball != "" {
// TODO remove when stemcell tarball is deprecated
stemcellManifest, err = b.stemcell.FromTarball(b.Options.StemcellTarball)
} else if b.Options.Kilnfile != "" {
stemcellManifests, err = b.stemcell.FromKilnfile(b.Options.Kilnfile)
} else if len(b.Options.StemcellsDirectories) > 0 {
stemcellManifests, err = b.stemcell.FromDirectories(b.Options.StemcellsDirectories)
}
if err != nil {
return fmt.Errorf("failed to parse stemcell: %s", err)
}
if b.Options.Metadata == "" {
return errors.New("missing required flag \"--metadata\"")
}
if len(b.Options.InstanceGroupDirectories) == 0 && len(b.Options.JobDirectories) > 0 {
return errors.New("--jobs-directory flag requires --instance-groups-directory to also be specified")
}
if b.Options.Kilnfile != "" && b.Options.StemcellTarball != "" {
return errors.New("--kilnfile cannot be provided when using --stemcell-tarball")
}
if b.Options.Kilnfile != "" && len(b.Options.StemcellsDirectories) > 0 {
return errors.New("--kilnfile cannot be provided when using --stemcells-directory")
}
if b.Options.StemcellTarball != "" && len(b.Options.StemcellsDirectories) > 0 {
return errors.New("--stemcell-tarball cannot be provided when using --stemcells-directory")
}
if b.Options.OutputFile != "" && b.Options.MetadataOnly {
return errors.New("--output-file cannot be provided when using --metadata-only")
}
boshVariables, err := b.boshVariables.ParseMetadataTemplates(b.Options.BOSHVariableDirectories, templateVariables)
if err != nil {
return fmt.Errorf("failed to parse bosh variables: %s", err)
}
forms, err := b.forms.ParseMetadataTemplates(b.Options.FormDirectories, templateVariables)
if err != nil {
return fmt.Errorf("failed to parse forms: %s", err)
}
instanceGroups, err := b.instanceGroups.ParseMetadataTemplates(b.Options.InstanceGroupDirectories, templateVariables)
if err != nil {
return fmt.Errorf("failed to parse instance groups: %s", err)
}
jobs, err := b.jobs.ParseMetadataTemplates(b.Options.JobDirectories, templateVariables)
if err != nil {
return fmt.Errorf("failed to parse jobs: %s", err)
}
propertyBlueprints, err := b.properties.ParseMetadataTemplates(b.Options.PropertyDirectories, templateVariables)
if err != nil {
return fmt.Errorf("failed to parse properties: %s", err)
}
runtimeConfigs, err := b.runtimeConfigs.ParseMetadataTemplates(b.Options.RuntimeConfigDirectories, templateVariables)
if err != nil {
return fmt.Errorf("failed to parse runtime configs: %s", err)
}
icon, err := b.icon.Encode(b.Options.IconPath)
if err != nil {
return fmt.Errorf("failed to encode icon: %s", err)
}
metadata, err := b.metadata.Read(b.Options.Metadata)
if err != nil {
return fmt.Errorf("failed to read metadata: %s", err)
}
isDevBuild := b.Options.MetadataOnly || b.Options.StubReleases
gitMetadataSHA, err := builder.GitMetadataSHA(filepath.Dir(b.Options.Kilnfile), isDevBuild)
if err != nil {
return fmt.Errorf("failed to read metadata: %s", err)
}
modTime := time.Unix(0, 0).In(time.UTC)
input := builder.InterpolateInput{
Version: b.Options.Version,
Variables: templateVariables,
BOSHVariables: boshVariables,
ReleaseManifests: releaseManifests,
StemcellManifests: stemcellManifests,
StemcellManifest: stemcellManifest, // TODO Remove when --stemcell-tarball is deprecated
FormTypes: forms,
IconImage: icon,
InstanceGroups: instanceGroups,
Jobs: jobs,
PropertyBlueprints: propertyBlueprints,
RuntimeConfigs: runtimeConfigs,
StubReleases: b.Options.StubReleases,
MetadataGitSHA: gitMetadataSHA,
}
interpolatedMetadata, err := b.interpolator.Interpolate(input, b.Options.Metadata, metadata)
if err != nil {
return err
}
if b.Options.MetadataOnly {
b.outLogger.Printf("%s", interpolatedMetadata)
return nil
}
err = b.tileWriter.Write(interpolatedMetadata, builder.WriteInput{
OutputFile: b.Options.OutputFile,
StubReleases: b.Options.StubReleases,
MigrationDirectories: b.Options.MigrationDirectories,
ReleaseDirectories: b.Options.ReleaseDirectories,
EmbedPaths: b.Options.EmbedPaths,
ModTime: modTime,
})
if err != nil {
return err
}
if b.Options.Sha256 {
err = b.checksummer.Sum(b.Options.OutputFile)
if err != nil {
return fmt.Errorf("failed to calculate checksum: %s", err)
}
}
if b.Options.IsFinal {
if err := b.writeBakeRecord(b.KilnVersion, b.Options.OutputFile, b.Options.Metadata, interpolatedMetadata); err != nil {
return err
}
}
return nil
}
func (b Bake) Usage() jhanda.Usage {
return jhanda.Usage{
Description: "Bakes tile metadata, stemcell, releases, and migrations into a format that can be consumed by OpsManager.",
ShortDescription: "bakes a tile",
Flags: b.Options,
}
}
func BakeArgumentsFromKilnfileConfiguration(options *BakeOptions, loadKilnfile func(string) (cargo.Kilnfile, error)) error {
if options.Kilnfile == "" || options.StemcellTarball != "" || len(options.StemcellsDirectories) > 0 {
return nil
}
kf, err := loadKilnfile(options.Kilnfile)
if err != nil {
return err
}
if len(kf.BakeConfigurations) == 0 {
return nil
} else if len(kf.BakeConfigurations) == 1 {
configuration := kf.BakeConfigurations[0]
if options.TileName != "" && options.TileName != configuration.TileName {
return fmt.Errorf("the provided tile_name %q does not match the configuration %q", options.TileName, configuration.TileName)
}
fromConfiguration(options, configuration)
options.TileName = configuration.TileName
} else {
index := slices.IndexFunc(kf.BakeConfigurations, func(configuration cargo.BakeConfiguration) bool {
return configuration.TileName == options.TileName
})
if index < 0 {
return errorBakeConfigurationNotFound(options, kf)
}
fromConfiguration(options, kf.BakeConfigurations[index])
}
return nil
}
func errorBakeConfigurationNotFound(options *BakeOptions, kf cargo.Kilnfile) error {
names := make([]string, 0, len(kf.BakeConfigurations))
for _, config := range kf.BakeConfigurations {
names = append(names, config.TileName)
}
slices.Sort(names)
names = slices.Compact(names)
return fmt.Errorf("the provided tile_name %q does not match any configuration. The available names are: %v", options.TileName, names)
}
func fromConfiguration(b *BakeOptions, configuration cargo.BakeConfiguration) {
if len(configuration.Metadata) > 0 {
b.Metadata = configuration.Metadata
}
if len(configuration.FormDirectories) > 0 {
b.FormDirectories = configuration.FormDirectories
}
if len(configuration.IconPath) > 0 {
b.IconPath = configuration.IconPath
}
if len(configuration.InstanceGroupDirectories) > 0 {
b.InstanceGroupDirectories = configuration.InstanceGroupDirectories
}
if len(configuration.JobDirectories) > 0 {
b.JobDirectories = configuration.JobDirectories
}
if len(configuration.MigrationDirectories) > 0 {
b.MigrationDirectories = configuration.MigrationDirectories
}
if len(configuration.PropertyDirectories) > 0 {
b.PropertyDirectories = configuration.PropertyDirectories
}
if len(configuration.RuntimeConfigDirectories) > 0 {
b.RuntimeConfigDirectories = configuration.RuntimeConfigDirectories
}
if len(configuration.BOSHVariableDirectories) > 0 {
b.BOSHVariableDirectories = configuration.BOSHVariableDirectories
}
if len(configuration.EmbedPaths) > 0 {
b.EmbedPaths = configuration.EmbedPaths
}
if len(configuration.VariableFiles) > 0 {
// simplify when go1.22 comes out https://pkg.go.dev/slices@master#Concat
variableFiles := make([]string, 0, len(configuration.VariableFiles)+len(b.VariableFiles))
variableFiles = append(variableFiles, configuration.VariableFiles...)
variableFiles = append(variableFiles, b.VariableFiles...)
slices.Sort(variableFiles)
variableFiles = slices.Compact(variableFiles)
b.VariableFiles = variableFiles
}
}