introduces option to set path to Dockerfile

Changelog.md

 # Changelog
 
+## [1.4.3] - 2019-03-14
+### Added
+* option to specify the path to the Dockerfile
+
 ## [1.4.2] - 2019-03-14
 ### Added
 * option to specify the image name. Useful for inherent builds

Readme.md

@@ -106,6 +106,7 @@ From now on charts located in this repository can be deployed by using the `--ch
 * `--build-context`: sets the build-context for `docker build` to a custom path. If omitted the path where the command is invoked is used.
 * `--reset`: this ignores eventually existing config-folders of docker, helm and kubectl and removes them.
 * `--image-name`: sets the image name in the local docker-registry. Can be useful for following builds to build upon existing builds
+* `--docker-file`: sets the path to the Dockerfile
 
 ## docker publish
 

assets/deployer

@@ -9,6 +9,7 @@ context="context"
 account="account"
 ca_file="${HOME}/k8s-ca.crt"
 image_file=""
+docker_file="Dockerfile"
 dockerconfig=""
 tags=""
 helmargs=""
@@ -32,7 +33,7 @@ if [[ ${PIPESTATUS[0]} -ne 4 ]]; then
 fi
 
 OPTIONS=
-LONGOPTS=docker-config:,tag:,build-arg:,values:,set:,set-string:,charts:,name:,token:,certificate-authority:,namespace:,cluster-url:,service-account:,output:,input:,repo-url:,build-context:,timeout:,reset,image-name:
+LONGOPTS=docker-config:,tag:,build-arg:,values:,set:,set-string:,charts:,name:,token:,certificate-authority:,namespace:,cluster-url:,service-account:,output:,input:,repo-url:,build-context:,timeout:,reset,image-name:,docker-file:
 
 # -use ! and PIPESTATUS to get exit code with errexit set
 # -temporarily store output to be able to check for errors
@@ -118,6 +119,10 @@ while true; do
 			image_name="$2"
 			shift 2
 			;;
+		--docker-file)
+			docker_file="$2"
+			shift 2
+			;;
 		--)
 			shift
 			break
@@ -405,7 +410,7 @@ build_image() {
 		cmd="$cmd --build-arg $arg --build-arg ${arg,,}"
 	done
 
-	cmd="$cmd -t ${image_name} ${build_context}"
+	cmd="$cmd -t ${image_name} -f ${docker_file} ${build_context}"
 	out=`$cmd 2>&1`
 	if [ "$?" != "0" ];then
 		echo "failed"

docker-compose.yml

@@ -72,6 +72,17 @@ services:
       DOCKER_HOST: tcp://docker:2375
     command: deployer build --build-context ./custom-context --output .tmp/image.tar.gz
 
+  build-custom-dockerfile:
+    build: .
+    volumes:
+      - ./:/app
+      - ./assets/deployer:/usr/local/bin/deployer
+    depends_on:
+      - docker
+    environment:
+      DOCKER_HOST: tcp://docker:2375
+    command: deployer build --docker-file ./custom-context/Dockerfile --output .tmp/image.tar.gz
+
   publish:
     build: .
     volumes: