Add format and check targets + integrate into CI

.drone.yml

@@ -2,6 +2,11 @@
 kind: pipeline
 name: coopcloud.tech/abra
 steps:
+  - name: make check
+    image: golang:1.16
+    commands:
+      - make check
+
   - name: make build
     image: golang:1.16
     commands:
@@ -16,6 +21,7 @@ steps:
       accesstoken:
         from_secret: autono_bot_access_token
     depends_on:
+      - make check
       - make build
     when:
       status:

Makefile

@@ -4,7 +4,7 @@ GOPATH  := $(shell go env GOPATH)
 LDFLAGS := "-X 'main.Commit=$(COMMIT)' -X 'main.Version=$(VERSION)'"
 VERSION := $(shell cat ./version)
 
-all: run install build clean
+all: run install build clean format check
 
 run:
 	go run -ldflags=$(LDFLAGS) $(ABRA)
@@ -17,3 +17,9 @@ build:
 
 clean:
 	rm '$(GOPATH)/bin/abra'
+
+format:
+	gofmt -s -w .
+
+check:
+	test -z $$(gofmt -l .) || (echo "gofmt: formatting issue - run 'make format' to resolve" && exit 1)