Convert from libbuildpack to powershell

- Include profile.d support for multibuildpacks

.gitignore

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

VERSION

@@ -1 +1 @@
-0.1.0
+0.2.0

bin/finalize.bat

@@ -0,0 +1,3 @@
+@ECHO OFF
+SET ScriptDir=%~dp0
+PowerShell -NoProfile -ExecutionPolicy Bypass -Command "& '%ScriptDir%finalize.ps1' %1 %2 %3 %4";

bin/finalize.ps1

@@ -0,0 +1,28 @@
+[CmdletBinding()]
+Param(
+[Parameter(Mandatory=$True,Position=1)] [string]$BuildDir,
+[Parameter(Mandatory=$True,Position=2)] [string]$CacheDir,
+[Parameter(Mandatory=$True,Position=3)] [string]$DepsDir,
+[Parameter(Mandatory=$True,Position=4)] [string]$DepsIdx
+)
+
+$ErrorActionPreference = "Stop"
+$env:PATH += ";$DepsDir/$DepsIdx/bin"
+
+Write-Output "-----> Build app"
+Set-Location $BuildDir
+go build -o myapp.exe .
+if ($lastexitcode -ne 0) {
+    Write-Output "ERROR building app with go"
+    Write-Output "EXITCODE: $lastexitcode"
+    Exit 1
+}
+
+Write-Output "-----> Configure runtime path and env vars"
+$dirs = Get-Childitem -Path $DepsDir | where{ Join-Path $_.FullName "bin" | Test-Path } | %{ '%DEPS_DIR%\' + $_.Name + '\bin' } | &{$ofs=';';"$input"}
+Set-Content -Path "$DepsDir/../profile.d/000_multi-supply.bat" -Value "set PATH=$dirs;%PATH%"
+Foreach ($d in (Get-Childitem -Path $DepsDir | where{ Join-Path $_.FullName "profile.d" | Test-Path })) {
+    Foreach ($f in (Get-Childitem -Path "$DepsDir/$d/profile.d")) {
+        Copy-Item $f.FullName -Destination "$DepsDir/../profile.d/${d}_${f}"
+    }
+}

bin/supply.bat

@@ -0,0 +1,3 @@
+@ECHO OFF
+SET ScriptDir=%~dp0
+PowerShell -NoProfile -ExecutionPolicy Bypass -Command "& '%ScriptDir%supply.ps1' %1 %2 %3 %4";

bin/supply.ps1

@@ -0,0 +1,32 @@
+[CmdletBinding()]
+Param(
+[Parameter(Mandatory=$True,Position=1)] [string]$BuildDir,
+[Parameter(Mandatory=$True,Position=2)] [string]$CacheDir,
+[Parameter(Mandatory=$True,Position=3)] [string]$DepsDir,
+[Parameter(Mandatory=$True,Position=4)] [string]$DepsIdx
+)
+
+$ErrorActionPreference = "Stop"
+# Write-Output "       BuildDir: $BuildDir"
+# Write-Output "       CacheDir: $CacheDir"
+# Write-Output "       DepsDir: $DepsDir"
+# Write-Output "       DepsIdx: $DepsIdx"
+# Write-Output ""
+
+$Version = (Get-Content "$PSScriptRoot/../VERSION" -Raw).Replace("`n","").Replace("`r","")
+Write-Output "-----> Go Buildpack (version $Version)"
+
+Write-Output "-----> Download go"
+$ProgressPreference = 'SilentlyContinue'
+(New-Object System.Net.WebClient).DownloadFile('https://dl.google.com/go/go1.11.4.windows-amd64.zip', "$CacheDir/go.zip")
+$ExpectedSHA = 'eeb20e21702f2b9469d9381df5de85e2f731b64a1f54effe196d0f7d0227fe14'
+$ActualSHA = (Get-FileHash "$CacheDir/go.zip" -Algorithm SHA256).Hash
+If ($ExpectedSHA -ne $ActualSHA) {
+    Write-Output "go.zip checksum did not match. expected '$ExpectedSHA', found '$ActualSHA'" 
+    Exit 1
+}
+
+Write-Output "-----> Extract go"
+Expand-Archive -Path "$CacheDir/go.zip" -DestinationPath "$DepsDir/$DepsIdx" -Force
+Move-Item -Path "$DepsDir/$DepsIdx/go/*" -Destination "$DepsDir/$DepsIdx"
+Remove-Item -Path "$DepsDir/$DepsIdx/go"

scripts/build.ps1

@@ -3,8 +3,5 @@ $ErrorActionPreference = "Stop"
 $Version = (Get-Content "$PSScriptRoot/../VERSION" -Raw).Replace("`n","").Replace("`r","")
 
 cd "$PSScriptRoot/.."
-$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
+Compress-Archive -LiteralPath bin, VERSION -CompressionLevel Optimal -DestinationPath "$PSScriptRoot/../go_buildpack-windows2016-v$Version.zip" -Force