mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-01 14:05:39 +00:00
64181e17c8
This makes gocross and its bootstrap script understand an absolute path in go.toolchain.rev to mean "use the given toolchain directly". Signed-off-by: David Anderson <danderson@tailscale.com>
86 lines
2.8 KiB
Bash
Executable File
86 lines
2.8 KiB
Bash
Executable File
#!/usr/bin/env sh
|
|
# Copyright (c) Tailscale Inc & AUTHORS
|
|
# SPDX-License-Identifier: BSD-3-Clause
|
|
#
|
|
# gocross-wrapper.sh is a wrapper that can be aliased to 'go', which
|
|
# transparently builds gocross using a "bootstrap" Go toolchain, and
|
|
# then invokes gocross.
|
|
|
|
set -eu
|
|
|
|
if [ "${CI:-}" = "true" ]; then
|
|
set -x
|
|
fi
|
|
|
|
# Locate a bootstrap toolchain and (re)build gocross if necessary. We run all of
|
|
# this in a subshell because posix shell semantics make it very easy to
|
|
# accidentally mutate the input environment that will get passed to gocross at
|
|
# the bottom of this script.
|
|
(
|
|
repo_root="$(dirname $0)/../.."
|
|
|
|
toolchain="$HOME/.cache/tailscale-go"
|
|
|
|
if [ ! -d "$toolchain" ]; then
|
|
mkdir -p "$HOME/.cache"
|
|
|
|
# We need any Go toolchain to build gocross, but the toolchain also has to
|
|
# be reasonably recent because we upgrade eagerly and gocross might not
|
|
# build with Go N-1. So, if we have no cached tailscale toolchain at all,
|
|
# fetch the initial one in shell. Once gocross is built, it'll manage
|
|
# updates.
|
|
read -r REV <$repo_root/go.toolchain.rev
|
|
|
|
case "$REV" in
|
|
/*)
|
|
toolchain="$REV"
|
|
;;
|
|
*)
|
|
# This works for linux and darwin, which is sufficient
|
|
# (we do not build tailscale-go for other targets).
|
|
HOST_OS=$(uname -s | tr A-Z a-z)
|
|
HOST_ARCH="$(uname -m)"
|
|
if [ "$HOST_ARCH" = "aarch64" ]; then
|
|
# Go uses the name "arm64".
|
|
HOST_ARCH="arm64"
|
|
elif [ "$HOST_ARCH" = "x86_64" ]; then
|
|
# Go uses the name "amd64".
|
|
HOST_ARCH="amd64"
|
|
fi
|
|
|
|
rm -rf "$toolchain" "$toolchain.extracted"
|
|
curl -f -L -o "$toolchain.tar.gz" "https://github.com/tailscale/go/releases/download/build-${REV}/${HOST_OS}-${HOST_ARCH}.tar.gz"
|
|
mkdir -p "$toolchain"
|
|
(cd "$toolchain" && tar --strip-components=1 -xf "$toolchain.tar.gz")
|
|
echo "$REV" >"$toolchain.extracted"
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
# Binaries run with `gocross run` can reinvoke gocross, resulting in a
|
|
# potentially fancy build that invokes external linkers, might be
|
|
# cross-building for other targets, and so forth. In one hilarious
|
|
# case, cmd/cloner invokes go with GO111MODULE=off at some stage.
|
|
#
|
|
# Anyway, build gocross in a stripped down universe.
|
|
gocross_path="$repo_root/gocross"
|
|
gocross_ok=0
|
|
if [ -x "$gocross_path" ]; then
|
|
gotver="$($gocross_path gocross-version 2>/dev/null || echo '')"
|
|
wantver="$(git rev-parse HEAD)"
|
|
if [ "$gotver" = "$wantver" ]; then
|
|
gocross_ok=1
|
|
fi
|
|
fi
|
|
if [ "$gocross_ok" = "0" ]; then
|
|
unset GOOS
|
|
unset GOARCH
|
|
unset GO111MODULE
|
|
unset GOROOT
|
|
export CGO_ENABLED=0
|
|
"$toolchain/bin/go" build -o "$gocross_path" -ldflags='-X tailscale.com/version/gitCommitStamp=$wantver' tailscale.com/tool/gocross
|
|
fi
|
|
) # End of the subshell execution.
|
|
|
|
exec "$(dirname $0)/../../gocross" "$@"
|