Convert from powershell to libbuildpack

- This enables use as a multi buildpack finalizer.

.gitignore

@@ -1 +1,3 @@
 /go_buildpack-*.zip
+/bin/finalize.exe
+/bin/supply.exe

VERSION

@@ -1 +1 @@
-0.0.1
+0.1.0

finalize.go

@@ -0,0 +1,28 @@
+package gowindowsbuildpack
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/cloudfoundry/libbuildpack"
+)
+
+type Finalizer struct {
+	Manifest Manifest
+	Stager   Stager
+	Command  Command
+	Log      *libbuildpack.Logger
+}
+
+func (f *Finalizer) Run() error {
+	f.Log.BeginStep("Go Build")
+	cmd := exec.Command("go", "build", "-o", "myapp.exe", ".")
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Dir = f.Stager.BuildDir()
+	cmd.Env = append(os.Environ(), "GOROOT="+f.Stager.DepDir())
+	if err := f.Command.Run(cmd); err != nil {
+		return err
+	}
+	return nil
+}

finalize/main.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"os"
+	"time"
+
+	"github.com/cloudfoundry/libbuildpack"
+	bp "github.com/dgodd/go-windows-buildpack"
+)
+
+func main() {
+	logger := libbuildpack.NewLogger(os.Stdout)
+
+	buildpackDir, err := libbuildpack.GetBuildpackDir()
+	if err != nil {
+		logger.Error("Unable to determine buildpack directory: %s", err.Error())
+		os.Exit(9)
+	}
+
+	manifest, err := libbuildpack.NewManifest(buildpackDir, logger, time.Now())
+	if err != nil {
+		logger.Error("Unable to load buildpack manifest: %s", err.Error())
+		os.Exit(10)
+	}
+
+	stager := libbuildpack.NewStager(os.Args[1:], logger, manifest)
+
+	if err = manifest.ApplyOverride(stager.DepsDir()); err != nil {
+		logger.Error("Unable to apply override.yml files: %s", err)
+		os.Exit(17)
+	}
+
+	if err := stager.SetStagingEnvironment(); err != nil {
+		logger.Error("Unable to setup environment variables: %s", err.Error())
+		os.Exit(11)
+	}
+
+	f := bp.Finalizer{
+		Manifest: manifest,
+		Stager:   stager,
+		Command:  &libbuildpack.Command{},
+		Log:      logger,
+	}
+
+	if err := f.Run(); err != nil {
+		os.Exit(12)
+	}
+
+	if err := libbuildpack.RunAfterCompile(stager); err != nil {
+		logger.Error("After Compile: %s", err.Error())
+		os.Exit(13)
+	}
+
+	if err := stager.SetLaunchEnvironment(); err != nil {
+		logger.Error("Unable to setup launch environment: %s", err.Error())
+		os.Exit(14)
+	}
+
+	stager.StagingComplete()
+}

go.mod

@@ -0,0 +1,3 @@
+module github.com/dgodd/go-windows-buildpack
+
+require github.com/cloudfoundry/libbuildpack v0.0.0-20190115190946-c10a4cd29881

go.sum

@@ -0,0 +1,53 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/Masterminds/semver v1.4.2 h1:WBLTQ37jOCzSLtXNdoo8bNM8876KhNqOKvrlGITgsTc=
+github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
+github.com/blang/semver v3.5.1+incompatible h1:cQNTCjp13qL8KC3Nbxr/y2Bqb63oX6wdnnjpJbkM4JQ=
+github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
+github.com/cloudfoundry/libbuildpack v0.0.0-20190115190946-c10a4cd29881 h1:640+S316H9WsAQKPvI99n+0k6n/Wp1cFIHRql6fRkqM=
+github.com/cloudfoundry/libbuildpack v0.0.0-20190115190946-c10a4cd29881/go.mod h1:rdSHSV2PLp7YHbdQgYbYMSmE6NJ1ZOAYnhMBQdkUVx0=
+github.com/elazarl/goproxy v0.0.0-20181111060418-2ce16c963a8a/go.mod h1:/Zj4wYkgs4iZTTu3o/KG3Itv/qCCa8VVMlb3i9OVuzc=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/golang/mock v1.2.0 h1:28o5sBqPkBsMGnC6b4MvE2TzSr5/AT4c/1fLqVGIwlk=
+github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/subcommands v0.0.0-20181012225330-46f0354f6315/go.mod h1:ZjhPrFU+Olkh9WazFPsl27BQ4UPiG37m3yTrtFlrHVk=
+github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/ginkgo v1.7.0 h1:WSHQ+IS43OoUrWtD1/bbclrwK8TTH5hzp+umCiuxHgs=
+github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/gomega v1.4.3 h1:RE1xgDvH7imwFD45h+u2SgIfERHlS2yNG4DObb5BSKU=
+github.com/onsi/gomega v1.4.3/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
+github.com/tidwall/gjson v1.1.3/go.mod h1:c/nTNbUr0E0OrXEhq1pwa8iEgc2DOt4ZZqAt1HtCkPA=
+github.com/tidwall/match v1.0.1/go.mod h1:LujAq0jyVjBy028G1WhWfIzbpQfMO8bBZ6Tyb0+pL9E=
+golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20181220203305-927f97764cc3 h1:eH6Eip3UpmR+yM/qI9Ijluzb1bNv/cAU/n+6l8tRSis=
+golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4 h1:YUO/7uOKsKeq9UokNS62b8FYywz3ker1l1vDZRCRefw=
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181221143128-b4a75ba826a6 h1:IcgEB62HYgAhX0Nd/QrVgZlxlcyxbGQHElLUhW2X4Fo=
+golang.org/x/sys v0.0.0-20181221143128-b4a75ba826a6/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/jarcoal/httpmock.v1 v1.0.0-20181117152235-275e9df93516 h1:H6trpavCIuipdInWrab8l34Mf+GGVfphniHostMdMaQ=
+gopkg.in/jarcoal/httpmock.v1 v1.0.0-20181117152235-275e9df93516/go.mod h1:d3R+NllX3X5e0zlG1Rful3uLvsGC/Q3OHut5464DEQw=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

interfaces.go

@@ -0,0 +1,28 @@
+package gowindowsbuildpack
+
+import (
+	"io"
+	"os/exec"
+
+	"github.com/cloudfoundry/libbuildpack"
+)
+
+type Stager interface {
+	BuildDir() string
+	CacheDir() string
+	DepDir() string
+}
+
+type Manifest interface {
+	DefaultVersion(string) (libbuildpack.Dependency, error)
+}
+
+type Installer interface {
+	InstallOnlyVersion(string, string) error
+}
+
+type Command interface {
+	Execute(string, io.Writer, io.Writer, string, ...string) error
+	Run(*exec.Cmd) error
+	// Output(dir string, program string, args ...string) (string, error)
+}

manifest.yml

@@ -0,0 +1,9 @@
+---
+language: go
+dependencies:
+- name: go
+  version: 1.11.4
+  uri: https://dl.google.com/go/go1.11.4.windows-amd64.zip
+  sha256: eeb20e21702f2b9469d9381df5de85e2f731b64a1f54effe196d0f7d0227fe14
+  cf_stacks:
+  - windows2016

scripts/build.ps1

@@ -3,5 +3,8 @@ $ErrorActionPreference = "Stop"
 $Version = (Get-Content "$PSScriptRoot/../VERSION" -Raw).Replace("`n","").Replace("`r","")
 
 cd "$PSScriptRoot/.."
-Compress-Archive -LiteralPath bin, VERSION -CompressionLevel Optimal -DestinationPath "$PSScriptRoot/../go_buildpack-windows2016-v$Version.zip" -Force
+$env:GOOS = "windows"
+go build -o bin/supply.exe ./supply/
+go build -o bin/finalize.exe ./finalize/
+Compress-Archive -LiteralPath bin, manifest.yml, VERSION -CompressionLevel Optimal -DestinationPath "$PSScriptRoot/../go_buildpack-windows2016-v$Version.zip" -Force
 

supply.go

@@ -0,0 +1,37 @@
+package gowindowsbuildpack
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/cloudfoundry/libbuildpack"
+)
+
+type Supplier struct {
+	Manifest  Manifest
+	Installer Installer
+	Stager    Stager
+	Command   Command
+	Log       *libbuildpack.Logger
+}
+
+func (s *Supplier) Run() error {
+	s.Log.BeginStep("Supplying go")
+
+	if err := s.Installer.InstallOnlyVersion("go", s.Stager.DepDir()); err != nil {
+		return err
+	}
+	files, err := ioutil.ReadDir(filepath.Join(s.Stager.DepDir(), "go"))
+	if err != nil {
+		return err
+	}
+	for _, file := range files {
+		os.Remove(filepath.Join(s.Stager.DepDir(), file.Name()))
+		if err := os.Rename(filepath.Join(s.Stager.DepDir(), "go", file.Name()), filepath.Join(s.Stager.DepDir(), file.Name())); err != nil {
+			return err
+		}
+	}
+
+	return os.Remove(filepath.Join(s.Stager.DepDir(), "go"))
+}

supply/main.go

@@ -0,0 +1,84 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/cloudfoundry/libbuildpack"
+	bp "github.com/dgodd/go-windows-buildpack"
+)
+
+func main() {
+	logger := libbuildpack.NewLogger(os.Stdout)
+
+	buildpackDir, err := libbuildpack.GetBuildpackDir()
+	if err != nil {
+		logger.Error("Unable to determine buildpack directory: %s", err.Error())
+		os.Exit(9)
+	}
+
+	manifest, err := libbuildpack.NewManifest(buildpackDir, logger, time.Now())
+	if err != nil {
+		logger.Error("Unable to load buildpack manifest: %s", err.Error())
+		os.Exit(10)
+	}
+	installer := libbuildpack.NewInstaller(manifest)
+
+	stager := libbuildpack.NewStager(os.Args[1:], logger, manifest)
+	if err := stager.CheckBuildpackValid(); err != nil {
+		os.Exit(11)
+	}
+
+	os.MkdirAll(filepath.Join(stager.DepDir(), "bin"), 0755)
+	os.MkdirAll(filepath.Join(stager.DepDir(), "lib"), 0755)
+
+	if err = installer.SetAppCacheDir(stager.CacheDir()); err != nil {
+		logger.Error("Unable to setup app cache dir: %s", err)
+		os.Exit(18)
+	}
+	if err = manifest.ApplyOverride(stager.DepsDir()); err != nil {
+		logger.Error("Unable to apply override.yml files: %s", err)
+		os.Exit(17)
+	}
+
+	err = libbuildpack.RunBeforeCompile(stager)
+	if err != nil {
+		logger.Error("Before Compile: %s", err.Error())
+		os.Exit(12)
+	}
+
+	if err := os.MkdirAll(filepath.Join(stager.DepDir(), "bin"), 0755); err != nil {
+		logger.Error("Unable to create bin directory: %s", err.Error())
+		os.Exit(13)
+	}
+
+	err = stager.SetStagingEnvironment()
+	if err != nil {
+		logger.Error("Unable to setup environment variables: %s", err.Error())
+		os.Exit(14)
+	}
+
+	s := bp.Supplier{
+		Manifest:  manifest,
+		Installer: installer,
+		Stager:    stager,
+		Command:   &libbuildpack.Command{},
+		Log:       logger,
+	}
+
+	err = s.Run()
+	if err != nil {
+		logger.Error("Error: %s", err)
+		os.Exit(15)
+	}
+
+	if err := stager.WriteConfigYml(nil); err != nil {
+		logger.Error("Error writing config.yml: %s", err.Error())
+		os.Exit(16)
+	}
+	if err = installer.CleanupAppCache(); err != nil {
+		logger.Error("Unable clean up app cache: %s", err)
+		os.Exit(19)
+	}
+}