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#!/bin/sh
# Retrieve the latest Go toolchain.
#
set -eu
cd "$(dirname "$0")"
read -r go_branch <go.toolchain.branch
upstream=$(git ls-remote https://github.com/tailscale/go "$go_branch" | awk '{print $1}')
current=$(cat go.toolchain.rev)
if [ "$upstream" != "$current" ]; then
echo "$upstream" >go.toolchain.rev
fi
if [ -n "$(git diff-index --name-only HEAD -- go.toolchain.rev)" ]; then
echo "pull-toolchain.sh: changes imported. Use git commit to make them permanent." >&2
fi
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