# WARNING: DO NOT EDIT, THIS FILE IS PROBABLY A COPY
#
# The original version of this file is located in the https://github.com/istio/common-files repo.
# If you're looking at this file in a different repo and want to make a change, please go to the
# common-files repo, make the change there and check it in. Then come back to this repo and run
# "make update-common".

# Copyright Istio Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# allow optional per-repo overrides
-include Makefile.overrides.mk

# Set the environment variable BUILD_WITH_CONTAINER to use a container
# to build the repo. The only dependencies in this mode are to have make and
# docker. If you'd rather build with a local tool chain instead, you'll need to
# figure out all the tools you need in your environment to make that work.
export BUILD_WITH_CONTAINER ?= 0

LOCAL_ARCH := $(shell uname -m)
ifeq ($(LOCAL_ARCH),x86_64)
    TARGET_ARCH ?= amd64
else ifeq ($(shell echo $(LOCAL_ARCH) | head -c 5),armv8)
    TARGET_ARCH ?= arm64
else ifeq ($(LOCAL_ARCH),aarch64)
    TARGET_ARCH ?= arm64
else ifeq ($(shell echo $(LOCAL_ARCH) | head -c 4),armv)
    TARGET_ARCH ?= arm
else
    $(error This system's architecture $(LOCAL_ARCH) isn't supported)
endif

LOCAL_OS := $(shell uname)
ifeq ($(LOCAL_OS),Linux)
    TARGET_OS ?= linux
    READLINK_FLAGS="-f"
else ifeq ($(LOCAL_OS),Darwin)
    TARGET_OS ?= darwin
    READLINK_FLAGS=""
else
    $(error This system's OS $(LOCAL_OS) isn't supported)
endif

export TARGET_OUT ?= $(shell pwd)/out/$(TARGET_OS)_$(TARGET_ARCH)

ifeq ($(BUILD_WITH_CONTAINER),1)
export TARGET_OUT = /work/out/$(TARGET_OS)_$(TARGET_ARCH)
CONTAINER_CLI ?= docker
DOCKER_SOCKET_MOUNT ?= -v /var/run/docker.sock:/var/run/docker.sock
IMG ?= gcr.io/istio-testing/build-tools:master-2019-12-05T22-22-12
UID = $(shell id -u)
GID = `grep docker /etc/group | cut -f3 -d:`
PWD = $(shell pwd)

$(info Building with the build container: $(IMG).)

# Determine the timezone across various platforms to pass into the
# docker run operation. This operation assumes zoneinfo is within
# the path of the file.
TIMEZONE=`readlink $(READLINK_FLAGS) /etc/localtime | sed -e 's/^.*zoneinfo\///'`

# Determine the docker.push credential bind mounts.
# Docker and GCR are supported credentials. At this time docker.push may
# not work well on Docker-For-Mac. This will be handled in a follow-up PR.
DOCKER_CREDS_MOUNT:=
ifneq (,$(wildcard $(HOME)/.docker))
$(info Using docker credential directory $(HOME)/.docker.)
DOCKER_CREDS_MOUNT+=--mount type=bind,source="$(HOME)/.docker",destination="/config/.docker",readonly
endif
ifneq (,$(wildcard $(HOME)/.config/gcloud))
$(info Using gcr credential directory $(HOME)/.config/gcloud.)
DOCKER_CREDS_MOUNT+=--mount type=bind,source="$(HOME)/.config/gcloud",destination="/config/.config/gcloud",readonly
endif

ENV_VARS:=
ifdef HUB
ENV_VARS+=-e HUB="$(HUB)"
endif
ifdef TAG
ENV_VARS+=-e TAG="$(TAG)"
endif

RUN = $(CONTAINER_CLI) run -t -i --sig-proxy=true -u $(UID):$(GID) --rm \
	-e IN_BUILD_CONTAINER="$(BUILD_WITH_CONTAINER)" \
	-e TZ="$(TIMEZONE)" \
	-e TARGET_ARCH="$(TARGET_ARCH)" \
	-e TARGET_OS="$(TARGET_OS)" \
	-e TARGET_OUT="$(TARGET_OUT)" \
	-e USER="${USER}" \
	$(ENV_VARS) \
	-v /etc/passwd:/etc/passwd:ro \
	$(DOCKER_SOCKET_MOUNT) \
	$(CONTAINER_OPTIONS) \
	--mount type=bind,source="$(PWD)",destination="/work" \
	--mount type=volume,source=go,destination="/go" \
	--mount type=volume,source=gocache,destination="/gocache" \
	$(DOCKER_CREDS_MOUNT) \
	-w /work $(IMG)

MAKE = $(RUN) make --no-print-directory -e -f Makefile.core.mk

%:
	@$(MAKE) $@

default:
	@$(MAKE)

.PHONY: default

else

$(info Building with your local toolchain.)
export GOBIN ?= $(GOPATH)/bin
include Makefile.core.mk

endif