open-consul/build-support/scripts/protobuf.sh

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#!/usr/bin/env bash
readonly SCRIPT_NAME="$(basename ${BASH_SOURCE[0]})"
readonly SCRIPT_DIR="$(dirname "${BASH_SOURCE[0]}")"
readonly SOURCE_DIR="$(dirname "$(dirname "${SCRIPT_DIR}")")"
readonly FN_DIR="$(dirname "${SCRIPT_DIR}")/functions"
source "${SCRIPT_DIR}/functions.sh"
unset CDPATH
set -euo pipefail
usage() {
cat <<-EOF
Usage: ${SCRIPT_NAME} [<options ...>]
Description:
Regenerates regenerates all Go files from protobuf definitions. In addition
to running the protoc generator it will also fixup build tags in the
generated code and regenerate mog outputs and RPC stubs.
Options:
-h | --help Print this help text.
EOF
}
function err_usage {
err "$1"
err ""
err "$(usage)"
}
function main {
while test $# -gt 0
do
case "$1" in
-h | --help )
usage
return 0
;;
esac
done
local mods=$(find . -name 'buf.gen.yaml' -exec dirname {} \; | sort)
for mod in $mods
do
status_stage "Generating protobuf module: $mod"
(
cd $mod
buf generate
for proto_file in $(buf ls-files)
do
postprocess_protobuf_code $proto_file
done
)
done
status "Generated all protobuf Go files"
generate_mog_code
status "Generated all mog Go files"
generate_rate_limit_mappings $mods
status "Generated gRPC rate limit mapping file"
return 0
}
function postprocess_protobuf_code {
local proto_path="${1:-}"
if [[ -z "${proto_path}" ]]; then
err "missing protobuf path argument"
return 1
fi
local proto_go_path="${proto_path%%.proto}.pb.go"
local proto_go_grpc_path="${proto_path%%.proto}_grpc.pb.go"
local proto_go_bin_path="${proto_path%%.proto}.pb.binary.go"
local proto_go_rpcglue_path="${proto_path%%.proto}.rpcglue.pb.go"
status_stage "Post-Processing generated files for ${proto_path}"
print_run protoc-go-inject-tag -input="${proto_go_path}" || {
err "Failed to run protoc-go-inject-tag for ${proto_path}"
return 1
}
local build_tags
build_tags="$(head -n 2 "${proto_path}" | grep '^//go:build\|// +build' || true)"
if test -n "${build_tags}"; then
for file in "${proto_go_path}" "${proto_go_bin_path}" "${proto_go_grpc_path}"
do
if test -f "${file}" -a "$(head -n 2 ${file})" != "${build_tags}"
then
echo "Adding build tags to ${file}"
echo -e "${build_tags}\n" >> "${file}.new"
cat "${file}" >> "${file}.new"
mv "${file}.new" "${file}"
fi
done
fi
# NOTE: this has to run after we fix up the build tags above
rm -f "${proto_go_rpcglue_path}"
print_run go run ${SOURCE_DIR}/internal/tools/proto-gen-rpc-glue/main.go -path "${proto_go_path}" || {
err "Failed to generate consul rpc glue outputs from ${proto_path}"
return 1
}
return 0
}
function generate_mog_code {
local mog_order
mog_order="$(go list -tags "${GOTAGS}" -deps ./proto/private/pb... | grep "consul/proto/private")"
for FULL_PKG in ${mog_order}; do
PKG="${FULL_PKG/#github.com\/hashicorp\/consul\/}"
status_stage "Generating ${PKG}/*.pb.go into ${PKG}/*.gen.go with mog"
find "$PKG" -name '*.gen.go' -delete
if [[ -n "${GOTAGS}" ]]; then
print_run mog -tags "${GOTAGS}" -source "./${PKG}/*.pb.go"
else
print_run mog -source "./${PKG}/*.pb.go"
fi
done
return 0
}
function generate_rate_limit_mappings {
local flags=(
"-output ${SOURCE_DIR}/agent/grpc-middleware/rate_limit_mappings.gen.go"
)
for path in $@; do
flags+=("-input $path")
done
print_run go run ${SOURCE_DIR}/internal/tools/protoc-gen-consul-rate-limit/postprocess/main.go ${flags[@]} || {
err "Failed to generate gRPC rate limit mappings"
return 1
}
}
main "$@"
exit $?