consul/build-support/scripts/proto-gen.sh

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#!/usr/bin/env bash
SCRIPT_NAME="$(basename ${BASH_SOURCE[0]})"
pushd $(dirname ${BASH_SOURCE[0]}) > /dev/null
SCRIPT_DIR=$(pwd)
pushd ../.. > /dev/null
SOURCE_DIR=$(pwd)
popd > /dev/null
pushd ../functions > /dev/null
FN_DIR=$(pwd)
popd > /dev/null
popd > /dev/null
source "${SCRIPT_DIR}/functions.sh"
function usage {
cat <<-EOF
Usage: ${SCRIPT_NAME} [<options ...>] <proto filepath>
Description:
Generate the Go files from protobuf definitions. In addition to
running the protoc generator it will also fixup build tags in the
generated code.
Options:
--import-replace Replace imports of google types with those from the gogo/protobuf repo.
--grpc Enable the gRPC plugin
-h | --help Print this help text.
EOF
}
function err_usage {
err "$1"
err ""
err "$(usage)"
}
function main {
local -i grpc=0
local -i imp_replace=0
local proto_path=
while test $# -gt 0
do
case "$1" in
-h | --help )
usage
return 0
;;
--grpc )
grpc=1
shift
;;
--import-replace )
imp_replace=1
shift
;;
* )
proto_path="$1"
shift
;;
esac
done
if test -z "${proto_path}"
then
err_usage "ERROR: No proto file specified"
return 1
fi
local gogo_proto_path=$(go list -f '{{ .Dir }}' -m github.com/gogo/protobuf)
local gogo_proto_mod_path=$(sed -e 's,\(.*\)github.com.*,\1,' <<< "${gogo_proto_path}")
local gogo_proto_imp_replace="Mgoogle/protobuf/timestamp.proto=github.com/gogo/protobuf/types"
gogo_proto_imp_replace="${gogo_proto_imp_replace},Mgoogle/protobuf/duration.proto=github.com/gogo/protobuf/types"
gogo_proto_imp_replace="${gogo_proto_imp_replace},Mgoogle/protobuf/empty.proto=github.com/gogo/protobuf/types"
gogo_proto_imp_replace="${gogo_proto_imp_replace},Mgoogle/protobuf/struct.proto=github.com/gogo/protobuf/types"
gogo_proto_imp_replace="${gogo_proto_imp_replace},Mgoogle/protobuf/wrappers.proto=github.com/gogo/protobuf/types"
gogo_proto_imp_replace="${gogo_proto_imp_replace},Mgoogle/api/annotations.proto=github.com/gogo/googleapis/google/api"
gogo_proto_imp_replace="${gogo_proto_imp_replace},Mgoogle/protobuf/field_mask.proto=github.com/gogo/protobuf/types"
gogo_proto_imp_replace="${gogo_proto_imp_replace},Mgoogle/protobuf/any.proto=github.com/gogo/protobuf/types"
local proto_go_path=${proto_path%%.proto}.pb.go
local proto_go_bin_path=${proto_path%%.proto}.pb.binary.go
local go_proto_out="paths=source_relative"
if is_set "${grpc}"
then
go_proto_out="${go_proto_out},plugins=grpc"
fi
if is_set "${imp_replace}"
then
go_proto_out="${go_proto_out},${gogo_proto_imp_replace}"
fi
if test -n "${go_proto_out}"
then
go_proto_out="${go_proto_out}:"
fi
# How we run protoc probably needs some documentation.
#
# This is the path to where
# -I="${gogo_proto_path}/protobuf" \
local -i ret=0
status_stage "Generating ${proto_path} into ${proto_go_path} and ${proto_go_bin_path}"
debug_run protoc \
-I="${gogo_proto_path}/protobuf" \
-I="${gogo_proto_path}" \
-I="${gogo_proto_mod_path}" \
-I="${SOURCE_DIR}" \
--gofast_out="${go_proto_out}${SOURCE_DIR}" \
--go-binary_out="${SOURCE_DIR}" \
"${proto_path}"
if test $? -ne 0
then
err "Failed to generate outputs from ${proto_path}"
return 1
fi
BUILD_TAGS=$(sed -e '/^[[:space:]]*$/,$d' < "${proto_path}" | grep '// +build')
if test -n "${BUILD_TAGS}"
then
echo -e "${BUILD_TAGS}\n" >> "${proto_go_path}.new"
cat "${proto_go_path}" >> "${proto_go_path}.new"
mv "${proto_go_path}.new" "${proto_go_path}"
echo -e "${BUILD_TAGS}\n" >> "${proto_go_bin_path}.new"
cat "${proto_go_bin_path}" >> "${proto_go_bin_path}.new"
mv "${proto_go_bin_path}.new" "${proto_go_bin_path}"
fi
return 0
}
main "$@"
exit $?