Added formatting check to makefile and ci (#17)

.drone.yml

@@ -8,6 +8,18 @@ clone:
     tags: true
 
 pipeline:
+  build:
+      image: nathansamson/flutter-builder-docker:v0.6.0
+      pull: true
+      commands:
+        - flutter packages get
+        - make format-check
+        - make build-all
+        - mkdir apks
+        - mv build/app/outputs/apk/*/*/*.apk apks
+      when:
+        event: [ push, tag ]
+
   test:
       image: nathansamson/flutter-builder-docker:v0.6.0
       pull: true
@@ -16,17 +28,6 @@ pipeline:
       when:
         event: [ push, tag, pull_request ]
  
-  build:
-      image: nathansamson/flutter-builder-docker:v0.6.0
-      pull: true
-      commands:
-        - flutter packages get
-        - make build-all
-        - mkdir apks
-        - mv build/app/outputs/apk/*/*/*.apk apks
-      when:
-        event: [ push, tag ]
- 
   # Push the releases to our pseudo-s3-bucket
   release:
     image: plugins/s3:1

Makefile

@@ -1,4 +1,5 @@
 GIT_LAST_COMMIT := $(shell git describe --tags --always | sed 's/-/+/' | sed 's/^v//')
+FLUTTER ?= flutter
 
 ifneq ($(DRONE_TAG),)
 	VERSION ?= $(subst v,,$(DRONE_TAG))-$(GIT_LAST_COMMIT)
@@ -12,19 +13,33 @@ endif
 
 .PHONY: test
 test:
-	flutter test
+	$(FLUTTER) test
 
 .PHONY: build-all
 build-all: build-release build-debug build-profile
 
 .PHONY: build-release
 build-release:
-	flutter build apk --release --build-name=$(VERSION) --flavor main
+	$(FLUTTER) build apk --release --build-name=$(VERSION) --flavor main
 
 .PHONY: build-debug
 build-debug:
-	flutter build apk --debug --build-name=$(VERSION) --flavor unsigned
+	$(FLUTTER) build apk --debug --build-name=$(VERSION) --flavor unsigned
 
 .PHONY: build-profile
 build-profile:
-	flutter build apk --profile --build-name=$(VERSION) --flavor unsigned
+	$(FLUTTER) build apk --profile --build-name=$(VERSION) --flavor unsigned
+
+.PHONY: format
+format:
+	$(FLUTTER) format lib
+
+.PHONY: format-check
+format-check:
+	@diff=$$(flutter format -n lib); \
+	if [ -n "$$diff" ]; then \
+		echo "The following files are not formatted correctly:"; \
+		echo "$${diff}"; \
+		echo "Please run 'make format' and commit the result."; \
+		exit 1; \
+	fi;