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

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#!/bin/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:
This script will build generate the Go files from protobuf files. In addition to
just running the correct 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/api/annotations.proto=github.com/gogo/googleapis/google/api"
gogo_proto_imp_replace="${gogo_proto_imp_replace},Mgoogle/protobuf/field_mask.proto=github.com/gogo/protobuf/types"
local proto_go_path=${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 $?