Sync more closely with the non-Windows Dockerfile, update "update.sh" and "generate-stackbrew-library.sh"

Author: tianon

1.6/Dockerfile.windows

@@ -0,0 +1,32 @@
+FROM microsoft/windowsservercore
+
+SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
+
+# 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 [Environment]::SetEnvironmentVariable('PATH', $env:GOPATH + '\bin;C:\go\bin;' + $env:PATH, [EnvironmentVariableTarget]::Machine);
+# doing this first to share cache across versions more aggressively
+
+ENV GOLANG_VERSION 1.6.3
+ENV GOLANG_DOWNLOAD_URL https://golang.org/dl/go$GOLANG_VERSION.windows-amd64.zip
+ENV GOLANG_DOWNLOAD_SHA256 6a18e5ed8b39785338986aecc6a3f36f5c4be286ff52db0ae3bcd2275ab70df0
+
+RUN Write-Host ('Downloading {0} ...' -f $env:GOLANG_DOWNLOAD_URL); \
+	(New-Object System.Net.WebClient).DownloadFile($env:GOLANG_DOWNLOAD_URL, 'go.zip'); \
+	\
+	Write-Host ('Verifying sha256 ({0}) ...' -f $env:GOLANG_DOWNLOAD_SHA256); \
+	if ((Get-FileHash go.zip -Algorithm sha256).Hash -ne $env:GOLANG_DOWNLOAD_SHA256) { \
+		exit 1; \
+	}; \
+	\
+	Write-Host 'Expanding ...'; \
+	Expand-Archive go.zip -DestinationPath C:\; \
+	\
+	Write-Host 'Removing ...'; \
+	Remove-Item go.zip -Force; \
+	\
+	Write-Host 'Complete.';
+
+WORKDIR $GOPATH

1.6/windows/windowsservercore/Dockerfile

@@ -68,10 +68,16 @@ for version in "${versions[@]}"; do
 		Directory: $version
 	EOE
 
-	for variant in onbuild cross wheezy alpine; do
-		[ -f "$version/$variant/Dockerfile" ] || continue
+	for v in \
+		onbuild cross wheezy alpine \
+		windows/windowsservercore windows/nanoserver \
+	; do
+		dir="$version/$v"
+		variant="$(basename "$v")"
 
-		commit="$(dirCommit "$version/$variant")"
+		[ -f "$dir/Dockerfile" ] || continue
+
+		commit="$(dirCommit "$dir")"
 
 		variantAliases=( "${versionAliases[@]/%/-$variant}" )
 		variantAliases=( "${variantAliases[@]//latest-/}" )
@@ -80,7 +86,8 @@ for version in "${versions[@]}"; do
 		cat <<-EOE
 			Tags: $(join ', ' "${variantAliases[@]}")
 			GitCommit: $commit
-			Directory: $version/$variant
+			Directory: $dir
 		EOE
+		[ "$variant" = "$v" ] || echo "Constraints: $variant"
 	done
 done

generate-stackbrew-library.sh

@@ -33,6 +33,8 @@ for version in "${versions[@]}"; do
 		continue
 	fi
 
+	windowsSha256="$(echo $googleSource | grep -Po '">go'"$fullVersion"'\.windows-amd64\.zip</a>.*?>[a-f0-9]{40,64}<' | sed -r 's!.*>([a-f0-9]{64})<.*!\1!; s!.*[<>]+.*!!' | tail -1)"
+
 	srcSha256="$(echo $googleSource | grep -Po '">go'"$fullVersion"'\.src\.tar\.gz</a>.*?>[a-f0-9]{40,64}<' | sed -r 's!.*>([a-f0-9]{64})<.*!\1!; s!.*[<>]+.*!!' | tail -1)"
 
 	[[ "$versionTag" == *.*[^0-9]* ]] || versionTag+='.0'
@@ -58,6 +60,14 @@ for version in "${versions[@]}"; do
 			travisEnv='\n  - VERSION='"$version VARIANT=$variant$travisEnv"
 		fi
 	done
+	for variant in windows; do
+		if [ -d "$version/$variant" ]; then
+			(
+				set -x
+				sed -ri 's/^(ENV GOLANG_DOWNLOAD_SHA256) .*/\1 '"$windowsSha256"'/' "$version/$variant/Dockerfile"
+			)
+		fi
+	done
 	travisEnv='\n  - VERSION='"$version VARIANT=$travisEnv"
 done