FROM golang:1.8-alpine

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

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 0.6.0
# gpg: key 0F386284C03A1162: public key "Philip Estes <estesp@gmail.com>" imported
#ENV MANIFEST_TOOL_GPG_KEY 27F3EA268A97867EAF0BD05C0F386284C03A1162
# TODO consume Phil's releases again (once he fixes https://github.com/estesp/manifest-tool/issues/47 properly)

COPY manifest-tool.patch ./

RUN set -euxo pipefail; \
	\
	mkdir -p bin; \
	\
	mkdir -p manifest-tool/src/github.com/estesp/manifest-tool; \
	wget -qO- "https://github.com/estesp/manifest-tool/archive/v${MANIFEST_TOOL_VERSION}.tar.gz" \
		| tar -xz --strip-components=1 -C manifest-tool/src/github.com/estesp/manifest-tool; \
	( cd manifest-tool/src/github.com/estesp/manifest-tool && patch -p1 ) < manifest-tool.patch; \
	for bashbrewArch in $BASHBREW_ARCHES; do \
		( \
			goEnv="$(.bashbrew-arch-to-goenv.sh "$bashbrewArch")"; eval "$goEnv"; \
			[ "$GOOS" = 'windows' ] && ext='.exe' || ext=; \
			GOPATH="$PWD/manifest-tool" \
				go build \
					-a -v \
					-ldflags '-s -w' \
# see https://github.com/golang/go/issues/9737#issuecomment-276817652 (and following comments) -- installsuffix is necessary (for now) to keep ARM
# can remove "$bashbrewArch" from "installsuffix" in Go 1.10+ (https://github.com/golang/go/commit/1b53f15ebb00dd158af674df410c7941abb2b933)
					-tags netgo -installsuffix "netgo-$bashbrewArch" \
					-o "$PWD/bin/manifest-tool-$bashbrewArch$ext" \
					github.com/estesp/manifest-tool \
			; \
			ls -lAFh "bin/manifest-tool-$bashbrewArch$ext"; \
			file "bin/manifest-tool-$bashbrewArch$ext"; \
		) \
	done; \
	\
	ls -l bin; \
	file bin/*

COPY go .

RUN set -euxo pipefail; \
	\
	mkdir -p bin; \
	\
	for bashbrewArch in $BASHBREW_ARCHES; do \
		( \
			goEnv="$(.bashbrew-arch-to-goenv.sh "$bashbrewArch")"; eval "$goEnv"; \
			[ "$GOOS" = 'windows' ] && ext='.exe' || ext=; \
			\
			go build \
				-a -v \
				-ldflags '-s -w' \
	# see https://github.com/golang/go/issues/9737#issuecomment-276817652 (and following comments) -- installsuffix is necessary (for now) to keep ARM
	# can remove "$bashbrewArch" from "installsuffix" in Go 1.10+ (https://github.com/golang/go/commit/1b53f15ebb00dd158af674df410c7941abb2b933)
				-tags netgo -installsuffix "netgo-$bashbrewArch" \
				-o "bin/bashbrew-$bashbrewArch$ext" \
				./src/bashbrew \
			; \
		) \
	done; \
	\
	ls -l bin; \
	file bin/*