[BUILD] Isolate docker instructions

Change-Id: Ice1bf6eaacdd038254b6749ab44dfba2fcc2222b
Signed-off-by: Greg Haskins <gregory.haskins@gmail.com>

Makefile

@@ -49,52 +49,12 @@ endif
 PKGNAME = github.com/$(PROJECT_NAME)
 GO_LDFLAGS = -X $(PKGNAME)/metadata.Version=$(PROJECT_VERSION)
 CGO_FLAGS = CGO_CFLAGS=" "
-DOCKER_GO_LDFLAGS= $(GO_LDFLAGS) -linkmode external -extldflags '-static -lpthread'
 ARCH=$(shell uname -m)
-OS=$(shell uname)
 CHAINTOOL_RELEASE=v0.10.0
 BASEIMAGE_RELEASE=$(shell cat ./.baseimage-release)
 
 export GO_LDFLAGS
 
-DOCKER_TAG=$(ARCH)-$(PROJECT_VERSION)
-BASE_DOCKER_TAG=$(ARCH)-$(BASEIMAGE_RELEASE)
-
-ifneq ($(OS),Darwin)
-DOCKER_RUN_FLAGS=--user=$(shell id -u)
-endif
-
-ifneq ($(http_proxy),)
-DOCKER_BUILD_FLAGS+=--build-arg http_proxy=$(http_proxy)
-DOCKER_RUN_FLAGS+=-e http_proxy=$(http_proxy)
-endif
-ifneq ($(https_proxy),)
-DOCKER_BUILD_FLAGS+=--build-arg https_proxy=$(https_proxy)
-DOCKER_RUN_FLAGS+=-e https_proxy=$(https_proxy)
-endif
-ifneq ($(HTTP_PROXY),)
-DOCKER_BUILD_FLAGS+=--build-arg HTTP_PROXY=$(HTTP_PROXY)
-DOCKER_RUN_FLAGS+=-e HTTP_PROXY=$(HTTP_PROXY)
-endif
-ifneq ($(HTTPS_PROXY),)
-DOCKER_BUILD_FLAGS+=--build-arg HTTPS_PROXY=$(HTTPS_PROXY)
-DOCKER_RUN_FLAGS+=-e HTTPS_PROXY=$(HTTPS_PROXY)
-endif
-ifneq ($(no_proxy),)
-DOCKER_BUILD_FLAGS+=--build-arg no_proxy=$(no_proxy)
-DOCKER_RUN_FLAGS+=-e no_proxy=$(no_proxy)
-endif
-ifneq ($(NO_PROXY),)
-DOCKER_BUILD_FLAGS+=--build-arg NO_PROXY=$(NO_PROXY)
-DOCKER_RUN_FLAGS+=-e NO_PROXY=$(NO_PROXY)
-endif
-
-DRUN = docker run -i --rm $(DOCKER_RUN_FLAGS) \
-	-v $(abspath .):/opt/gopath/src/$(PKGNAME) \
-	-w /opt/gopath/src/$(PKGNAME)
-
-DBUILD = docker build $(DOCKER_BUILD_FLAGS)
-
 EXECUTABLES = go docker git curl
 K := $(foreach exec,$(EXECUTABLES),\
 	$(if $(shell which $(exec)),some string,$(error "No $(exec) in PATH: Check dependencies")))
@@ -109,6 +69,8 @@ pkgmap.peer           := $(PKGNAME)/peer
 pkgmap.orderer        := $(PKGNAME)/orderer
 pkgmap.block-listener := $(PKGNAME)/examples/events/block-listener
 
+include docker-env.mk
+
 all: native docker checks
 
 checks: linter unit-test behave

docker-env.mk

@@ -0,0 +1,60 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+ifneq ($(shell uname),Darwin)
+DOCKER_RUN_FLAGS=--user=$(shell id -u)
+endif
+
+ifneq ($(http_proxy),)
+DOCKER_BUILD_FLAGS+=--build-arg http_proxy=$(http_proxy)
+DOCKER_RUN_FLAGS+=-e http_proxy=$(http_proxy)
+endif
+ifneq ($(https_proxy),)
+DOCKER_BUILD_FLAGS+=--build-arg https_proxy=$(https_proxy)
+DOCKER_RUN_FLAGS+=-e https_proxy=$(https_proxy)
+endif
+ifneq ($(HTTP_PROXY),)
+DOCKER_BUILD_FLAGS+=--build-arg HTTP_PROXY=$(HTTP_PROXY)
+DOCKER_RUN_FLAGS+=-e HTTP_PROXY=$(HTTP_PROXY)
+endif
+ifneq ($(HTTPS_PROXY),)
+DOCKER_BUILD_FLAGS+=--build-arg HTTPS_PROXY=$(HTTPS_PROXY)
+DOCKER_RUN_FLAGS+=-e HTTPS_PROXY=$(HTTPS_PROXY)
+endif
+ifneq ($(no_proxy),)
+DOCKER_BUILD_FLAGS+=--build-arg no_proxy=$(no_proxy)
+DOCKER_RUN_FLAGS+=-e no_proxy=$(no_proxy)
+endif
+ifneq ($(NO_PROXY),)
+DOCKER_BUILD_FLAGS+=--build-arg NO_PROXY=$(NO_PROXY)
+DOCKER_RUN_FLAGS+=-e NO_PROXY=$(NO_PROXY)
+endif
+
+DRUN = docker run -i --rm $(DOCKER_RUN_FLAGS) \
+	-v $(abspath .):/opt/gopath/src/$(PKGNAME) \
+	-w /opt/gopath/src/$(PKGNAME)
+
+DBUILD = docker build $(DOCKER_BUILD_FLAGS)
+
+DOCKER_TAG=$(ARCH)-$(PROJECT_VERSION)
+BASE_DOCKER_TAG=$(ARCH)-$(BASEIMAGE_RELEASE)
+
+DOCKER_GO_LDFLAGS += $(GO_LDFLAGS)
+DOCKER_GO_LDFLAGS += -linkmode external -extldflags '-static -lpthread'
+
+
+