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# To include this protoc/make snippet, copy this to the top of your Makefile:
#
# default: build
#
# genproto.mk:
# @docker pull lightstep/gogoprotoc:latest
# @-docker rm -v lightstep-get-genproto-mk
# @docker create --name lightstep-get-genproto-mk lightstep/gogoprotoc:latest
# @docker cp lightstep-get-genproto-mk:/genproto.mk genproto.mk
# @docker rm -v lightstep-get-genproto-mk
#
# include genproto.mk
GOLANG = golang
PBUF = protobuf
GOGO = gogo
ROOT = $(PWD)/../../..
TMPNAME = tmpgen
TMPDIR = $(PWD)/$(TMPNAME)
# List of standard protoc options
PROTOC_OPTS = plugins=grpc
# These flags manage mapping the google-standard protobuf types (e.g., Timestamp)
# into the annotated versions supplied with Gogo. The trailing `,` matters.
GOGO_OPTS = Mgoogle/protobuf/timestamp.proto=github.com/gogo/protobuf/types,Mgoogle/protobuf/duration.proto=github.com/gogo/protobuf/types,
define protos_to_gogo_targets
$(foreach proto,$(1),$(GOLANG)-$(GOGO)-$(basename $(proto)))
endef
define protos_to_protobuf_targets
$(foreach proto,$(1),$(GOLANG)-$(PBUF)-$(basename $(proto)))
endef
define gen_gogo_target
$(call gen_protoc_target,$(1),$(GOLANG)/$(GOGO)/$(basename $(1))pb/$(basename $(1)).pb.go,$(GOGO),--gogofaster_out=$(GOGO_OPTS)$(PROTOC_OPTS))
endef
define gen_protobuf_target
$(call gen_protoc_target,$(1),$(GOLANG)/$(PBUF)/$(basename $(1))pb/$(basename $(1)).pb.go,$(PBUF),--go_out=$(PROTOC_OPTS))
endef
define protoc_targets_to_link_targets
$(foreach target,$(1),$(target)-link)
endef
define gen_protoc_link
@mkdir -p "$(subst -,/,$(subst -link,,$(2)))pb"
@echo "// DO NOT EDIT; THIS FILE IS AUTOGENERATED FROM ../../../$(1)" > $(subst -,/,$(subst -link,,$(2)))pb/$(1)
@sed -E 's@import "github.com/lightstep/([^/]+)/(.*).proto"@import "github.com/lightstep/\1/$(GOLANG)/$(3)/\2pb/\2.proto"@g' < $(1) >> $(subst -,/,$(subst -link,,$(2)))pb/$(1)
endef
# $(1) = .proto input
# $(2) = .pb.go output
# $(3) = gogo or protobuf
# $(4) = protoc-output spec
#
# Note: the --proto_path include "." below references the
# docker image's $(ROOT)/src. /input is mapped to the
# host's $(ROOT)/src.
define gen_protoc_target
@echo compiling $(1) [$(3)]
@mkdir -p $(TMPDIR)
@sed -E 's@import "github.com/lightstep/([^/]+)/(.*).proto"@import "github.com/lightstep/\1/$(GOLANG)/$(3)/\2pb/\2.proto"@g' < $(1) > $(TMPDIR)/$(1)
@docker run --rm \
-v $(ROOT):/input:ro \
-v $(TMPDIR):/output \
lightstep/gogoprotoc:latest \
protoc \
-I./github.com/google/googleapis \
$(4):/output \
--proto_path=/input:. \
/input/$(PKG_PREFIX)/$(TMPNAME)/$(1)
@mkdir -p $(GOLANG)/$(3)/$(basename $(1))pb/$(basename $(1))pbfakes
@sed 's@package $(basename $(1))pb@package $(basename $(1))pb // import "$(PKG_PREFIX)/golang/$(3)/$(basename $(1))pb"@' < $(TMPDIR)/$(PKG_PREFIX)/$(TMPNAME)/$(basename $(1)).pb.go > $(GOLANG)/$(3)/$(basename $(1))pb/$(basename $(1)).pb.go
@rm $(TMPDIR)/$(PKG_PREFIX)/$(TMPNAME)/$(basename $(1)).pb.go
@rm $(TMPDIR)/$(1)
endef
define clean_protoc_targets
@rm -rf $(foreach target,$(1),$(subst -,/,$(target)pb))
endef
# generate_fake: runs counterfeiter in docker container to generate fake classes
# $(1) output file path
# $(2) input file path
# $(3) class name
define generate_fake
@docker run --rm \
-v $(ROOT):/usergo/src \
lightstep/gobuild:latest \
/bin/bash -c "cd /usergo/src/$(PKG_PREFIX) && counterfeiter -o $(1) $(2) $(3)"
endef
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