Set useful version in signalilo --version for signalilo:latest

.github/workflows/push.yml

@@ -19,6 +19,8 @@ jobs:
     - name: Set version from tag
       if: startsWith(github.ref, 'refs/tags/v')
       run: echo ::set-env name=VERSION::$(echo ${GITHUB_REF#refs/tags/})
+    - name: Set binary version from Git
+      run: echo ::set-env name=BINARY_VERSION::$(git describe --tags --always --dirty --match=v*)
     - name: Build Image
       run: make docker
       env:
@@ -29,4 +31,4 @@ jobs:
         name: "${{ env.IMAGE }}:${{ env.VERSION }}"
         username: ${{ secrets.DOCKER_USERNAME }}
         password: ${{ secrets.DOCKER_PASSWORD }}
-        buildargs: VERSION
+        buildargs: BINARY_VERSION

Dockerfile

@@ -10,7 +10,7 @@
 #####################
 FROM golang:1.14 as builder
 
-ARG VERSION
+ARG BINARY_VERSION
 
 # Workdir must be outside of GOPATH because of go mod usage
 WORKDIR /src/signalilo

Makefile

@@ -1,7 +1,8 @@
 # Project parameters
 BINARY_NAME ?= signalilo
 
-VERSION ?= $(shell git describe --tags --always --dirty --match=v* || (echo "command failed $$?"; exit 1))
+BINARY_VERSION = $(shell git describe --tags --always --dirty --match=v* || (echo "command failed $$?"; exit 1))
+VERSION ?= $(BINARY_VERSION)
 
 IMAGE_NAME ?= docker.io/vshn/$(BINARY_NAME):$(VERSION)