Build packer on Windows machines

build.ps1

[CmdletBinding()]
param(
 [Parameter(Position=0, Mandatory=$true)]
 [ValidateSet('386', 'amd64', 'arm')]
 [string[]]$Arch=('386', 'amd64', 'arm'),
 [Parameter(Position=1, Mandatory=$true)]
 [ValidateSet('linux', 'darwin', 'windows', 'freesd', 'openbsd')]
 [string[]]$OS=('linux', 'darwin', 'windows', 'freebsd', 'openbsd'),
 [Parameter(Position=2, Mandatory=$false)]
 [switch]$Deploy
)
begin
{
  $Source = Split-Path -Parent (Split-Path -Parent $MyInvocation.MyCommand.Definition)
  Write-Debug "Building in $Source"

  Push-Location $Source

  $GOPath = &go env GOPATH
  $GOOS   = &go env GOOS
  $GOArch = &go env GOARCH

  $GitCommit=&git rev-parse HEAD
  if (! [string]::IsNullOrEmpty($(&git status --porcelain))) { $GitDirty="+CHANGES" }
  Write-Verbose "Git commit: ${GitCommit}${GitDirty}"
}
process
{
  Write-Verbose "==> Getting dependencies..."
  go get -v -d ./...
  Write-Verbose "==> Removing old directory..."
  if (Test-Path bin) { Remove-Item bin -Recurse -Force }
  if (Test-Path pkg) { Remove-Item pkg -Recurse -Force }
  New-Item -Type Directory bin,pkg | Out-Null

  Write-Verbose "==> Building for $OS and $Arch..."
  gox -os="$OS" -arch="$Arch" -ldflags "-X main.GitCommit ${GitCommit}${GitDirty}" -output "pkg/{{.OS}}_{{.Arch}}/packer-{{.Dir}}" ./...
  if (! $?)
  {
    Write-Error "Compilation failed"
    exit 1
  }

  Get-ChildItem ./pkg -Directory -Depth 1 | ForEach {
    if (Test-Path ./pkg/$_/packer-packer.exe) { Move-Item ./pkg/$_/packer-packer.exe ./pkg/$_/packer.exe }
    if (Test-Path ./pkg/$_/packer-packer)     { Move-Item ./pkg/$_/packer-packer     ./pkg/$_/packer     }
  }

  if (Test-Path ./pkg/"${GOOS}_${GOArch}")
  {
    Write-Verbose "==> Copying binaries for this platform..."
    # This we are in a Powershell, we have to be on Windows... at least until now
    Get-ChildItem ./pkg/"${GOOS}_${GOArch}" -Depth 1 -File | ForEach {
      Write-Verbose "     $_"
      Copy-Item ./pkg/"${GOOS}_${GOArch}/$_" bin
      Copy-Item ./pkg/"${GOOS}_${GOArch}/$_" $GOPath/bin
    }
  }

  if ($Deploy)
  {
    $PackerRoot = (Split-Path (Get-Command packer.exe).Source -Parent)
    if ($PackerRoot -like '*chocolatey*')
    {
      $PackerRoot = [System.IO.Path]::Combine((Split-Path $PackerRoot -Parent), 'lib', 'packer', 'tools')
    }
    if (! (Test-Path $PackerRoot))
    {
      Throw "Cannot deploy to $PackerRoot"
    }
    Write-Verbose "==> Deploying:"
    Copy-Item bin/packer-builder-hyperv-iso.exe,bin/packer-post-processor-vagrant.exe $PackerRoot
  }

  Write-Verbose "==> Results:"
  Get-ChildItem bin
}
end
{
  Pop-Location
}

Save it in the scripts folder of the packer root source directory, and run it from that script folder.

i typically run:

.\build.ps1 -Arch amd64 -OS windows -Deploy -Verbose

To get my packer install updated.

looks good @gildas