go

# Go only supports targeting arm64 from version 1.9
# This requires bootstrapping on 386/amd64 host
FROM --platform=linux/386 stagex/bootstrap-stage1 AS base

# Go bootstrapping is described by this order:
# C -> 1.4 -> 1.19 -> 1.20 -> steps of +2 -> current version
# Here, the last step (building current from last bootstrap) is also cross-compiling to the target arch

FROM base AS build
ADD fetch/go1.4.src.tar.gz /go1_4
WORKDIR /go1_4/go
ENV GOHOSTARCH=386
RUN --network=none <<-EOF
	mkdir -p /var/tmp

	set -eux
	cd src
	bash -- make.bash -v=1 -d
EOF

ADD fetch/go1.19.11.src.tar.gz /go1_19_11
WORKDIR /go1_19_11/go
ENV GOROOT_BOOTSTRAP=/go1_4/go
RUN --network=none <<-EOF
	set -eux
	cd src
	bash -- make.bash -v=1 -d
EOF

ADD fetch/go1.20.6.src.tar.gz /go1_20_6
WORKDIR /go1_20_6/go
ENV GOROOT_BOOTSTRAP=/go1_19_11/go
RUN --network=none <<-EOF
	set -eux
	cd src
	bash -- make.bash -v=1 -d
EOF

ADD fetch/go1.22.12.src.tar.gz /go1_22_12
WORKDIR /go1_22_12/go
ENV GOROOT_BOOTSTRAP=/go1_20_6/go
RUN --network=none <<-EOF
	set -eux
	cd src
	bash -- make.bash -v=1 -d
EOF

ADD fetch/go1.24.6.src.tar.gz /go1_24_6
WORKDIR /go1_24_6/go
ENV GOROOT_BOOTSTRAP=/go1_22_12/go
RUN --network=none <<-EOF
	set -eux
	cd src
	bash -- make.bash -v=1 -d
EOF

ARG VERSION
ARG TARGETARCH
ADD fetch/go${VERSION}.src.tar.gz /
WORKDIR /go
ENV GOROOT_BOOTSTRAP=/go1_24_6/go
ENV GOARCH=${TARGETARCH}
RUN --network=none <<-EOF
	set -eux
	cd src
	bash -- make.bash -v=1 -d
EOF

RUN --network=none <<-EOF
	set -eux
	mkdir -p /rootfs/usr/lib/go
	mv bin/linux_${TARGETARCH}/* bin
	rm -rf bin/linux_386 bin/linux_${TARGETARCH}
	cp -a bin lib pkg src /rootfs/usr/lib/go
	mkdir -p /rootfs/usr/bin
	ln -s /usr/lib/go/bin/go /rootfs/usr/bin/go
	ln -s /usr/lib/go/bin/gofmt /rootfs/usr/bin/gofmt
EOF

ARG TARGETARCH
ADD fetch/go${VERSION}.linux-${TARGETARCH}.tar.gz /tmp/go-binaries
RUN --network=none <<-EOF
	set -eux
	cd /tmp/go-binaries/go
	find bin pkg/tool -type f -exec sha512sum {} + > /tmp/go-sums
	cd /rootfs/usr/lib/go
	# Verify all binaries from the official build are found and match
	sha512sum -c /tmp/go-sums
EOF

FROM stagex/core-filesystem AS package
COPY --from=build /rootfs/ /