Dockerfile-windows-nanoserver.template

FROM mcr.microsoft.com/windows/nanoserver:%%MICROSOFT-TAG%%

# $ProgressPreference: https://github.com/PowerShell/PowerShell/issues/2138#issuecomment-251261324
SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]

# no Git installed (intentionally)
#  -- Nano Server is "Windows Slim"

# ideally, this would be C:\go to match Linux a bit closer, but C:\go is the recommended install path for Go itself on Windows
ENV GOPATH C:\\gopath

# PATH isn't actually set in the Docker image, so we have to set it from within the container
RUN $newPath = ('{0}\bin;C:\go\bin;{1}' -f $env:GOPATH, $env:PATH); \
	Write-Host ('Updating PATH: {0}' -f $newPath); \
# Nano Server does not have "[Environment]::SetEnvironmentVariable()"
	setx /M PATH $newPath;
# doing this first to share cache across versions more aggressively

ENV GOLANG_VERSION %%VERSION%%

RUN $url = ('https://golang.org/dl/go{0}.windows-amd64.zip' -f $env:GOLANG_VERSION); \
	Write-Host ('Downloading {0} ...' -f $url); \
	Invoke-WebRequest -Uri $url -OutFile 'go.zip'; \
	\
	$sha256 = '%%WIN-SHA256%%'; \
	Write-Host ('Verifying sha256 ({0}) ...' -f $sha256); \
	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $sha256) { \
		Write-Host 'FAILED!'; \
		exit 1; \
	}; \
	\
	Write-Host 'Expanding ...'; \
	Expand-Archive go.zip -DestinationPath C:\; \
	\
	Write-Host 'Verifying install ("go version") ...'; \
	go version; \
	\
	Write-Host 'Removing ...'; \
	Remove-Item go.zip -Force; \
	\
	Write-Host 'Complete.';

WORKDIR $GOPATH