FROM golang:1.10-alpine3.8

RUN apk add --no-cache \
		file \
		gnupg

WORKDIR /usr/src/bashbrew
ENV GOPATH /usr/src/bashbrew:/usr/src/bashbrew/vendor
ENV CGO_ENABLED 0

ENV BASHBREW_ARCHES \
		amd64 \
		arm32v5 \
		arm32v6 \
		arm32v7 \
		arm64v8 \
		darwin-amd64 \
		i386 \
		ppc64le \
		s390x \
		windows-amd64

COPY .bashbrew-arch-to-goenv.sh /usr/local/bin/

# https://github.com/estesp/manifest-tool/releases
ENV MANIFEST_TOOL_VERSION 0.9.0
# gpg: key 0F386284C03A1162: public key "Philip Estes <estesp@gmail.com>" imported
ENV MANIFEST_TOOL_GPG_KEY 27F3EA268A97867EAF0BD05C0F386284C03A1162

RUN set -euxo pipefail; \
	\
	export GNUPGHOME="$(mktemp -d)"; \
	gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$MANIFEST_TOOL_GPG_KEY"; \
	\
	mkdir -p bin; \
	\
	for bashbrewArch in $BASHBREW_ARCHES; do \
		( \
			goEnv="$(.bashbrew-arch-to-goenv.sh "$bashbrewArch")"; eval "$goEnv"; \
			srcBin="manifest-tool-$GOOS-$GOARCH"; \
			if [ "$GOARCH" = 'arm' ]; then [ -n "$GOARM" ]; srcBin="${srcBin}v$GOARM"; fi; \
			[ "$GOOS" = 'windows' ] && ext='.exe' || ext=; \
			srcBin="$srcBin$ext"; \
			targetBin="bin/manifest-tool-$bashbrewArch$ext"; \
			wget -O "$targetBin.asc" "https://github.com/estesp/manifest-tool/releases/download/v${MANIFEST_TOOL_VERSION}/$srcBin.asc"; \
			wget -O "$targetBin" "https://github.com/estesp/manifest-tool/releases/download/v${MANIFEST_TOOL_VERSION}/$srcBin"; \
			gpg --batch --verify "$targetBin.asc" "$targetBin"; \
			ls -lAFh "$targetBin"*; \
			file "$targetBin"*; \
		) \
	done; \
	\
	gpgconf --kill all; \
	rm -r "$GNUPGHOME"; \
	\
	ls -lAFh bin/manifest-tool-*; \
	file bin/manifest-tool-*

COPY go .

RUN set -euxo pipefail; \
	\
	mkdir -p bin; \
	\
	for bashbrewArch in $BASHBREW_ARCHES; do \
		( \
			goEnv="$(.bashbrew-arch-to-goenv.sh "$bashbrewArch")"; eval "$goEnv"; \
			[ "$GOOS" = 'windows' ] && ext='.exe' || ext=; \
			\
			targetBin="bin/bashbrew-$bashbrewArch$ext"; \
			go build \
				-a -v \
				-ldflags '-s -w' \
				-tags netgo -installsuffix netgo \
				-o "$targetBin" \
				./src/bashbrew \
			; \
			ls -lAFh "$targetBin"; \
			file "$targetBin"; \
		) \
	done; \
	\
	ls -lAFh bin/bashbrew-*; \
	file bin/bashbrew-*