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tool/gocross: make gocross behave with pre-release Go toolchains

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Also switch the wrapper script to use bash not posix shell. We now
depend on bash elsewhere for saner behavior in esoteric areas, so
might as well use it everywhere for consistency.

Fixes #8425

Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson 2023-06-23 12:10:24 -07:00 committed by Dave Anderson
parent 4a58b1c293
commit bfe5623a86
1 changed files with 19 additions and 14 deletions
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33
tool/gocross/gocross-wrapper.sh
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@ -1,4 +1,4 @@
#!/usr/bin/env sh
#!/usr/bin/env bash
# Copyright (c) Tailscale Inc & AUTHORS
# SPDX-License-Identifier: BSD-3-Clause
#
@ -6,9 +6,9 @@
# transparently builds gocross using a "bootstrap" Go toolchain, and
# then invokes gocross.
set -eu
set -euo pipefail
if [ "${CI:-}" = "true" ]; then
if [[ "${CI:-}" == "true" ]]; then
set -x
fi
@ -17,7 +17,7 @@ fi
# accidentally mutate the input environment that will get passed to gocross at
# the bottom of this script.
(
repo_root="$(dirname $0)/../.."
repo_root="${BASH_SOURCE%/*}/../.."
# Figuring out if gocross needs a rebuild, as well as the rebuild itself, need
# to happen with CWD inside this repo. Since we're in a subshell entirely
@ -28,16 +28,21 @@ cd "$repo_root"
toolchain="$HOME/.cache/tailscale-go"
if [ -d "$toolchain" ]; then
if [[ -d "$toolchain" ]]; then
# A toolchain exists, but is it recent enough to compile gocross? If not,
# wipe it out so that the next if block fetches a usable one.
want_go_minor=$(grep -E '^go ' "go.mod" | cut -f2 -d'.')
have_go_minor=$(cut -f2 -d'.' <$toolchain/VERSION)
if [ -z "$have_go_minor" -o "$have_go_minor" -lt "$want_go_minor" ]; then
have_go_minor=$(head -1 "$toolchain/VERSION" | cut -f2 -d'.')
# Shortly before stable releases, we run release candidate
# toolchains, which have a non-numeric suffix on the version
# number. Remove the rc qualifier, we just care about the minor
# version.
have_go_minor="${have_go_minor%rc*}"
if [[ -z "$have_go_minor" || "$have_go_minor" -lt "$want_go_minor" ]]; then
rm -rf "$toolchain" "$toolchain.extracted"
fi
fi
if [ ! -d "$toolchain" ]; then
if [[ ! -d "$toolchain" ]]; then
mkdir -p "$HOME/.cache"
# We need any Go toolchain to build gocross, but the toolchain also has to
@ -56,10 +61,10 @@ if [ ! -d "$toolchain" ]; then
# (we do not build tailscale-go for other targets).
HOST_OS=$(uname -s | tr A-Z a-z)
HOST_ARCH="$(uname -m)"
if [ "$HOST_ARCH" = "aarch64" ]; then
if [[ "$HOST_ARCH" == "aarch64" ]]; then
# Go uses the name "arm64".
HOST_ARCH="arm64"
elif [ "$HOST_ARCH" = "x86_64" ]; then
elif [[ "$HOST_ARCH" == "x86_64" ]]; then
# Go uses the name "amd64".
HOST_ARCH="amd64"
fi
@ -83,13 +88,13 @@ fi
gocross_path="gocross"
gocross_ok=0
wantver="$(git rev-parse HEAD)"
if [ -x "$gocross_path" ]; then
if [[ -x "$gocross_path" ]]; then
gotver="$($gocross_path gocross-version 2>/dev/null || echo '')"
if [ "$gotver" = "$wantver" ]; then
if [[ "$gotver" == "$wantver" ]]; then
gocross_ok=1
fi
fi
if [ "$gocross_ok" = "0" ]; then
if [[ "$gocross_ok" == "0" ]]; then
unset GOOS
unset GOARCH
unset GO111MODULE
@ -99,4 +104,4 @@ if [ "$gocross_ok" = "0" ]; then
fi
) # End of the subshell execution.
exec "$(dirname $0)/../../gocross" "$@"
exec "${BASH_SOURCE%/*}/../../gocross" "$@"