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buildpack.go
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buildpack.go
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package v2action
import (
"archive/zip"
"io"
"io/ioutil"
"os"
"path/filepath"
"time"
"code.cloudfoundry.org/cli/actor/actionerror"
"code.cloudfoundry.org/cli/api/cloudcontroller/ccerror"
"code.cloudfoundry.org/cli/api/cloudcontroller/ccv2"
"code.cloudfoundry.org/cli/api/cloudcontroller/ccv2/constant"
"code.cloudfoundry.org/cli/types"
"code.cloudfoundry.org/cli/util"
"code.cloudfoundry.org/cli/util/download"
"gopkg.in/cheggaaa/pb.v1"
)
type Buildpack ccv2.Buildpack
func (buildpack Buildpack) NoStack() bool {
return len(buildpack.Stack) == 0
}
//go:generate counterfeiter . Downloader
type Downloader interface {
Download(url string, tmpDirPath string) (string, error)
}
//go:generate counterfeiter . SimpleProgressBar
type SimpleProgressBar interface {
Initialize(path string) (io.Reader, int64, error)
Terminate()
}
type ProgressBar struct {
bar *pb.ProgressBar
}
func NewProgressBar() *ProgressBar {
return &ProgressBar{}
}
func (p *ProgressBar) Initialize(path string) (io.Reader, int64, error) {
file, err := os.Open(path)
if err != nil {
return nil, 0, err
}
fileInfo, err := file.Stat()
if err != nil {
return nil, 0, err
}
p.bar = pb.New(int(fileInfo.Size())).SetUnits(pb.U_BYTES)
p.bar.ShowTimeLeft = false
p.bar.Start()
return p.bar.NewProxyReader(file), fileInfo.Size(), nil
}
func (p *ProgressBar) Terminate() {
// Adding sleep to ensure UI has finished drawing
time.Sleep(time.Second)
p.bar.Finish()
}
func (actor *Actor) CreateBuildpack(name string, position int, enabled bool) (Buildpack, Warnings, error) {
buildpack := ccv2.Buildpack{
Name: name,
Position: types.NullInt{IsSet: true, Value: position},
Enabled: types.NullBool{IsSet: true, Value: enabled},
}
ccBuildpack, warnings, err := actor.CloudControllerClient.CreateBuildpack(buildpack)
if _, ok := err.(ccerror.BuildpackAlreadyExistsWithoutStackError); ok {
return Buildpack{}, Warnings(warnings), actionerror.BuildpackAlreadyExistsWithoutStackError{BuildpackName: name}
}
if _, ok := err.(ccerror.BuildpackNameTakenError); ok {
return Buildpack{}, Warnings(warnings), actionerror.BuildpackNameTakenError{Name: name}
}
return Buildpack{GUID: ccBuildpack.GUID}, Warnings(warnings), err
}
func (actor *Actor) getBuildpacks(name string, stack string) ([]Buildpack, Warnings, error) {
var filters []ccv2.Filter
bpName := ccv2.Filter{
Type: constant.NameFilter,
Operator: constant.EqualOperator,
Values: []string{name},
}
filters = append(filters, bpName)
if len(stack) > 0 {
stackFilter := ccv2.Filter{
Type: constant.StackFilter,
Operator: constant.EqualOperator,
Values: []string{stack},
}
filters = append(filters, stackFilter)
}
ccv2Buildpacks, warnings, err := actor.CloudControllerClient.GetBuildpacks(filters...)
if err != nil {
return nil, Warnings(warnings), err
}
var buildpacks []Buildpack
for _, buildpack := range ccv2Buildpacks {
buildpacks = append(buildpacks, Buildpack(buildpack))
}
if len(buildpacks) == 0 {
return nil, Warnings(warnings), actionerror.BuildpackNotFoundError{BuildpackName: name, StackName: stack}
}
return buildpacks, Warnings(warnings), nil
}
func (actor *Actor) PrepareBuildpackBits(inputPath string, tmpDirPath string, downloader Downloader) (string, error) {
if util.IsHTTPScheme(inputPath) {
pathToDownloadedBits, err := downloader.Download(inputPath, tmpDirPath)
if err != nil {
return "", err
}
return pathToDownloadedBits, nil
}
if filepath.Ext(inputPath) == ".zip" {
return inputPath, nil
}
info, err := os.Stat(inputPath)
if err != nil {
return "", err
}
if info.IsDir() {
var empty bool
empty, err = isEmptyDirectory(inputPath)
if err != nil {
return "", err
}
if empty {
return "", actionerror.EmptyBuildpackDirectoryError{Path: inputPath}
}
archive := filepath.Join(tmpDirPath, filepath.Base(inputPath)) + ".zip"
err = Zipit(inputPath, archive, "")
if err != nil {
return "", err
}
return archive, nil
}
return inputPath, nil
}
func isEmptyDirectory(name string) (bool, error) {
f, err := os.Open(name)
if err != nil {
return false, err
}
defer f.Close()
_, err = f.Readdirnames(1)
if err == io.EOF {
return true, nil
}
return false, err
}
func (actor *Actor) RenameBuildpack(oldName string, newName string, stackName string) (Warnings, error) {
var (
getWarnings Warnings
allWarnings Warnings
foundBuildpacks []Buildpack
oldBp Buildpack
err error
found bool
)
foundBuildpacks, getWarnings, err = actor.getBuildpacks(oldName, stackName)
allWarnings = append(allWarnings, getWarnings...)
if err != nil {
return allWarnings, err
}
if len(foundBuildpacks) == 1 {
oldBp = foundBuildpacks[0]
} else {
if stackName == "" {
for _, bp := range foundBuildpacks {
if bp.NoStack() {
oldBp = bp
found = true
break
}
}
}
if !found {
return allWarnings, actionerror.MultipleBuildpacksFoundError{BuildpackName: oldName}
}
}
if err != nil {
return Warnings(allWarnings), err
}
oldBp.Name = newName
_, updateWarnings, err := actor.UpdateBuildpack(oldBp)
allWarnings = append(allWarnings, updateWarnings...)
if err != nil {
return Warnings(allWarnings), err
}
return Warnings(allWarnings), nil
}
func (actor *Actor) UpdateBuildpack(buildpack Buildpack) (Buildpack, Warnings, error) {
updatedBuildpack, warnings, err := actor.CloudControllerClient.UpdateBuildpack(ccv2.Buildpack(buildpack))
if err != nil {
switch err.(type) {
case ccerror.ResourceNotFoundError:
return Buildpack{}, Warnings(warnings), actionerror.BuildpackNotFoundError{BuildpackName: buildpack.Name}
case ccerror.BuildpackAlreadyExistsWithoutStackError:
return Buildpack{}, Warnings(warnings), actionerror.BuildpackAlreadyExistsWithoutStackError{BuildpackName: buildpack.Name}
case ccerror.BuildpackAlreadyExistsForStackError:
return Buildpack{}, Warnings(warnings), actionerror.BuildpackAlreadyExistsForStackError{Message: err.Error()}
default:
return Buildpack{}, Warnings(warnings), err
}
}
return Buildpack(updatedBuildpack), Warnings(warnings), nil
}
func (actor *Actor) UpdateBuildpackByNameAndStack(name, currentStack string, position types.NullInt, locked types.NullBool, enabled types.NullBool, newStack string) (string, Warnings, error) {
warnings := Warnings{}
var (
buildpack Buildpack
execWarnings Warnings
err error
)
execWarnings, err = actor.checkIfNewStackExists(newStack)
warnings = append(warnings, execWarnings...)
if err != nil {
return "", warnings, err
}
var buildpacks []Buildpack
buildpacks, execWarnings, err = actor.getBuildpacks(name, currentStack)
warnings = append(warnings, execWarnings...)
if err != nil {
return "", warnings, err
}
allBuildpacksHaveStacks := true
for _, buildpack := range buildpacks {
if buildpack.NoStack() {
allBuildpacksHaveStacks = false
}
}
if allBuildpacksHaveStacks && len(newStack) > 0 {
return "", warnings, actionerror.BuildpackStackChangeError{
BuildpackName: buildpacks[0].Name,
BinaryName: actor.Config.BinaryName(),
}
} else if allBuildpacksHaveStacks && len(buildpacks) > 1 {
return "", Warnings(warnings), actionerror.MultipleBuildpacksFoundError{BuildpackName: name}
}
buildpack = buildpacks[0]
if len(buildpacks) > 1 && newStack != "" {
for _, b := range buildpacks {
if b.NoStack() {
buildpack = b
}
}
}
if position != buildpack.Position || locked != buildpack.Enabled || enabled != buildpack.Enabled || newStack != buildpack.Stack {
buildpack.Position = position
buildpack.Locked = locked
buildpack.Enabled = enabled
buildpack.Stack = newStack
_, execWarnings, err = actor.UpdateBuildpack(buildpack)
warnings = append(warnings, execWarnings...)
if err != nil {
return "", warnings, err
}
}
return buildpack.GUID, warnings, err
}
func (actor *Actor) checkIfNewStackExists(newStack string) (Warnings, error) {
if len(newStack) > 0 {
_, execWarnings, err := actor.GetStackByName(newStack)
if err != nil {
return execWarnings, err
}
}
return nil, nil
}
func (actor *Actor) UploadBuildpack(GUID string, pathToBuildpackBits string, progBar SimpleProgressBar) (Warnings, error) {
progressBarReader, size, err := progBar.Initialize(pathToBuildpackBits)
if err != nil {
return Warnings{}, err
}
defer progBar.Terminate()
warnings, err := actor.CloudControllerClient.UploadBuildpack(GUID, pathToBuildpackBits, progressBarReader, size)
if err != nil {
if e, ok := err.(ccerror.BuildpackAlreadyExistsForStackError); ok {
return Warnings(warnings), actionerror.BuildpackAlreadyExistsForStackError{Message: e.Message}
}
}
return Warnings(warnings), err
}
func (actor *Actor) UploadBuildpackFromPath(inputPath, buildpackGUID string, progressBar SimpleProgressBar) (Warnings, error) {
downloader := download.NewDownloader(time.Second * 30)
tmpDirPath, err := ioutil.TempDir("", "buildpack-dir-")
if err != nil {
return Warnings{}, err
}
defer os.RemoveAll(tmpDirPath)
pathToBuildpackBits, err := actor.PrepareBuildpackBits(inputPath, tmpDirPath, downloader)
if err != nil {
return Warnings{}, err
}
return actor.UploadBuildpack(buildpackGUID, pathToBuildpackBits, progressBar)
}
// Zipit zips the source into a .zip file in the target dir
func Zipit(source, target, prefix string) error {
// Thanks to Svett Ralchev
// http://blog.ralch.com/tutorial/golang-working-with-zip/
zipfile, err := os.Create(target)
if err != nil {
return err
}
defer zipfile.Close()
if prefix != "" {
_, err = io.WriteString(zipfile, prefix)
if err != nil {
return err
}
}
archive := zip.NewWriter(zipfile)
defer archive.Close()
err = filepath.Walk(source, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if path == source {
return nil
}
header, err := zip.FileInfoHeader(info)
if err != nil {
return err
}
header.Name, err = filepath.Rel(source, path)
if err != nil {
return err
}
header.Name = filepath.ToSlash(header.Name)
if info.IsDir() {
header.Name += "/"
header.SetMode(info.Mode())
} else {
header.Method = zip.Deflate
header.SetMode(fixMode(info.Mode()))
}
writer, err := archive.CreateHeader(header)
if err != nil {
return err
}
if info.IsDir() {
return nil
}
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
_, err = io.Copy(writer, file)
return err
})
return err
}