tailscale/scripts/check_license_headers.sh

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#!/bin/sh
#
# Copyright (c) Tailscale Inc & AUTHORS
# SPDX-License-Identifier: BSD-3-Clause
#
# check_license_headers.sh checks that all Go files in the given
# directory tree have a correct-looking Tailscale license header.
check_file() {
got=$1
want=$(cat <<EOF
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
EOF
)
if [ "$got" = "$want" ]; then
return 0
fi
return 1
}
if [ $# != 1 ]; then
echo "Usage: $0 rootdir" >&2
exit 1
fi
fail=0
for file in $(find $1 \( -name '*.go' -or -name '*.tsx' -or -name '*.ts' -not -name '*.config.ts' \) -not -path '*/.git/*' -not -path '*/node_modules/*'); do
case $file in
$1/tempfork/*)
# Skip, tempfork of third-party code
;;
$1/wgengine/router/ifconfig_windows.go)
# WireGuard copyright.
;;
$1/cmd/tailscale/cli/authenticode_windows.go)
# WireGuard copyright.
;;
*_string.go)
# Generated file from go:generate stringer
;;
$1/control/controlbase/noiseexplorer_test.go)
# Noiseexplorer.com copyright.
;;
*/zsyscall_windows.go)
# Generated syscall wrappers
;;
$1/util/winutil/subprocess_windows_test.go)
# Subprocess test harness code
;;
$1/util/winutil/testdata/testrestartableprocesses/main.go)
# Subprocess test harness code
;;
*$1/k8s-operator/apis/v1alpha1/zz_generated.deepcopy.go)
# Generated kube deepcopy funcs file starts with a Go build tag + an empty line
header="$(head -5 $file | tail -n+3 )"
;;
*)
header="$(head -2 $file)"
;;
esac
if [ ! -z "$header" ]; then
if ! check_file "$header"; then
fail=1
echo "${file#$1/} doesn't have the right copyright header:"
echo "$header" | sed -e 's/^/ /g'
fi
fi
done
if [ $fail -ne 0 ]; then
exit 1
fi