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#!/bin/sh
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# Copyright (c) ${date_range} Cloudflare, Inc.
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# Licensed under the Apache 2.0 license found in the LICENSE file or at:
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#     https://opensource.org/licenses/Apache-2.0
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SCRIPT_DIR=$(realpath $(dirname "$0"))/../..
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CURRENT_YEAR=$(date +"%Y")
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function copyright() {
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  local source_file="$1"
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  local date_range="$2"
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  local wip_file=$(mktemp -t $(basename "${source_file}"))
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  cat <<EOF > "${wip_file}"
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// Copyright (c) ${date_range} Cloudflare, Inc.
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// Licensed under the Apache 2.0 license found in the LICENSE file or at:
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//     https://opensource.org/licenses/Apache-2.0
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EOF
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  cat "${source_file}" >> "${wip_file}"
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  mv "${wip_file}" "${source_file}"
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}
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cd "${SCRIPT_DIR}"
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for source_file in $(find . -name '*.c++' -o -name '*.h' -o -name '*.ts' -o -name '*.js') ; do
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  if grep -Liq copyright "${source_file}" ; then
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    continue
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  fi
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  if [[ "${source_file}" = *"node"* ]]; then
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    continue
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  fi
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  commit=$(git log --oneline --format="%as %h %s" --reverse ${source_file} | head -1)
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  commit_date=$(echo ${commit}| sed -e 's/ .*//')
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  commit_year=$(echo ${commit_date}| sed -e 's/-.*//')
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  if [ "${commit_date}" = "2022-09-13" -o "${commit_date}" = "2022-09-19" ]; then
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    copyright "${source_file}" "2017-2023"
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  elif [ "${commit_year}" = "${CURRENT_YEAR}" ]; then
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    copyright "${source_file}" "${CURRENT_YEAR}"
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  else
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    copyright "${source_file}" "${commit_year}-${CURRENT_YEAR}"
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  fi
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done