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Dockerfile
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#
# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
#
# PLEASE DO NOT EDIT IT DIRECTLY.
#
FROM alpine:3.20 AS build
ENV PATH /usr/local/go/bin:$PATH
ENV GOLANG_VERSION 1.21.11
RUN set -eux; \
now="$(date '+%s')"; \
apk add --no-cache --virtual .fetch-deps \
ca-certificates \
gnupg \
# busybox's "tar" doesn't handle directory mtime correctly, so our SOURCE_DATE_EPOCH lookup doesn't work (the mtime of "/usr/local/go" always ends up being the extraction timestamp)
tar \
; \
arch="$(apk --print-arch)"; \
url=; \
case "$arch" in \
'x86_64') \
url='https://dl.google.com/go/go1.21.11.linux-amd64.tar.gz'; \
sha256='54a87a9325155b98c85bc04dc50298ddd682489eb47f486f2e6cb0707554abf0'; \
;; \
'armhf') \
url='https://dl.google.com/go/go1.21.11.linux-armv6l.tar.gz'; \
sha256='a62bff8297816a387a36bbda2889dd0dbcf0f8ce03bc62162ecd6918d6acecb5'; \
;; \
'armv7') \
url='https://dl.google.com/go/go1.21.11.linux-armv6l.tar.gz'; \
sha256='a62bff8297816a387a36bbda2889dd0dbcf0f8ce03bc62162ecd6918d6acecb5'; \
;; \
'aarch64') \
url='https://dl.google.com/go/go1.21.11.linux-arm64.tar.gz'; \
sha256='715d9a7ff72e4e0e3378c48318c52c6e4dd32a47c4136f3c08846f89b2ee2241'; \
;; \
'x86') \
url='https://dl.google.com/go/go1.21.11.linux-386.tar.gz'; \
sha256='8b00cbc2519c2d052177bf2c8472bf06578d3b0182eeb3406a1d7d4e5d4c59ef'; \
;; \
'ppc64le') \
url='https://dl.google.com/go/go1.21.11.linux-ppc64le.tar.gz'; \
sha256='6f5e18187abc4ff1c3173afbe38ef29f84b6d1ee7173f40075a4134863b209a5'; \
;; \
'riscv64') \
url='https://dl.google.com/go/go1.21.11.linux-riscv64.tar.gz'; \
sha256='3ee5f9aac2f252838d88bb4cf93560c567814889c74d87ad8a04be16aa5e1b21'; \
;; \
's390x') \
url='https://dl.google.com/go/go1.21.11.linux-s390x.tar.gz'; \
sha256='489c363d5da2d3d5709419bda61856582c5ebdc7874ca7ecdebf67d736d329e6'; \
;; \
*) echo >&2 "error: unsupported architecture '$arch' (likely packaging update needed)"; exit 1 ;; \
esac; \
\
wget -O go.tgz.asc "$url.asc"; \
wget -O go.tgz "$url"; \
echo "$sha256 *go.tgz" | sha256sum -c -; \
\
# https://github.com/golang/go/issues/14739#issuecomment-324767697
GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
# https://www.google.com/linuxrepositories/
gpg --batch --keyserver keyserver.ubuntu.com --recv-keys 'EB4C 1BFD 4F04 2F6D DDCC EC91 7721 F63B D38B 4796'; \
# let's also fetch the specific subkey of that key explicitly that we expect "go.tgz.asc" to be signed by, just to make sure we definitely have it
gpg --batch --keyserver keyserver.ubuntu.com --recv-keys '2F52 8D36 D67B 69ED F998 D857 78BD 6547 3CB3 BD13'; \
gpg --batch --verify go.tgz.asc go.tgz; \
gpgconf --kill all; \
rm -rf "$GNUPGHOME" go.tgz.asc; \
\
tar -C /usr/local -xzf go.tgz; \
rm go.tgz; \
\
# save the timestamp from the tarball so we can restore it for reproducibility, if necessary (see below)
SOURCE_DATE_EPOCH="$(stat -c '%Y' /usr/local/go)"; \
export SOURCE_DATE_EPOCH; \
touchy="$(date -d "@$SOURCE_DATE_EPOCH" '+%Y%m%d%H%M.%S')"; \
# for logging validation/edification
date --date "@$SOURCE_DATE_EPOCH" --rfc-2822; \
# sanity check (detected value should be older than our wall clock)
[ "$SOURCE_DATE_EPOCH" -lt "$now" ]; \
\
if [ "$arch" = 'armv7' ]; then \
[ -s /usr/local/go/go.env ]; \
before="$(go env GOARM)"; [ "$before" != '7' ]; \
{ \
echo; \
echo '# https://github.com/docker-library/golang/issues/494'; \
echo 'GOARM=7'; \
} >> /usr/local/go/go.env; \
after="$(go env GOARM)"; [ "$after" = '7' ]; \
# (re-)clamp timestamp for reproducibility (allows "COPY --link" to be more clever/useful)
touch -t "$touchy" /usr/local/go/go.env /usr/local/go; \
fi; \
\
# ideally at this point, we would just "COPY --link ... /usr/local/go/ /usr/local/go/" but BuildKit insists on creating the parent directories (perhaps related to https://github.com/opencontainers/image-spec/pull/970), and does so with unreproducible timestamps, so we instead create a whole new "directory tree" that we can "COPY --link" to accomplish what we want
mkdir /target /target/usr /target/usr/local; \
mv -vT /usr/local/go /target/usr/local/go; \
ln -svfT /target/usr/local/go /usr/local/go; \
touch -t "$touchy" /target/usr/local /target/usr /target; \
\
apk del --no-network .fetch-deps; \
\
# smoke test
go version; \
# make sure our reproducibile timestamp is probably still correct (best-effort inline reproducibility test)
epoch="$(stat -c '%Y' /target/usr/local/go)"; \
[ "$SOURCE_DATE_EPOCH" = "$epoch" ]; \
find /target -newer /target/usr/local/go -exec sh -c 'ls -ld "$@" && exit "$#"' -- '{}' +
FROM alpine:3.20
RUN apk add --no-cache ca-certificates
ENV GOLANG_VERSION 1.21.11
# don't auto-upgrade the gotoolchain
# https://github.com/docker-library/golang/issues/472
ENV GOTOOLCHAIN=local
ENV GOPATH /go
ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
# (see notes above about "COPY --link")
COPY --from=build --link /target/ /
RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 1777 "$GOPATH"
WORKDIR $GOPATH