Release via CI (#7)

 * [x] go-code version cleanup
 * [x] extend tests (vet & format)
 * [x] build & publish docker

.woodpecker.yml

@@ -3,17 +3,37 @@ clone:
     image: plugins/git:next
 
 pipeline:
-  test:
+  lint:
     image: golang:1.16
     commands:
-      - go test -race -cover ./...
+      - make vet
+      - make formatcheck
 
-  vet:
+  test:
     image: golang:1.16
     commands:
-      - go vet ./...
+      - make test
 
   build:
     image: golang:1.16
     commands:
-      - go build
+      - make build
+
+  dryrun:
+    image: plugins/docker
+    dockerfile: docker/Dockerfile.linux.amd64
+    dry_run: true
+    repo: woodpeckerci/plugin-s3
+    tags: latest
+    when:
+      event: pull_request
+
+  publish:
+    image: plugins/docker
+    dockerfile: docker/Dockerfile.linux.amd64
+    repo: woodpeckerci/plugin-s3
+    tags: latest
+    secrets: [ docker_username, docker_password ]
+    when:
+      branch: master
+      event: push

Makefile

@@ -0,0 +1,52 @@
+GOFILES_NOVENDOR = $(shell find . -type f -name '*.go' -not -path "./vendor/*" -not -path "./.git/*")
+GO_PACKAGES ?= $(shell go list ./... | grep -v /vendor/)
+
+VERSION ?= next
+ifneq ($(DRONE_TAG),)
+	VERSION := $(DRONE_TAG:v%=%)
+endif
+
+# append commit-sha to next version
+BUILD_VERSION := $(VERSION)
+ifeq ($(BUILD_VERSION),next)
+	BUILD_VERSION := $(shell echo "next-$(shell echo ${DRONE_COMMIT_SHA} | head -c 8)")
+endif
+
+LDFLAGS := -s -w -extldflags "-static" -X main.version=${BUILD_VERSION}
+
+all: build
+
+vendor:
+	go mod tidy
+	go mod vendor
+
+formatcheck:
+	@([ -z "$(shell gofmt -d $(GOFILES_NOVENDOR) | head)" ]) || (echo "Source is unformatted"; exit 1)
+
+format:
+	@gofmt -w ${GOFILES_NOVENDOR}
+
+.PHONY: clean
+clean:
+	go clean -i ./...
+	rm -rf release/
+
+.PHONY: vet
+vet:
+	@echo "Running go vet..."
+	@go vet $(GO_PACKAGES)
+
+test:
+	go test -race -cover ./...
+
+build:
+	GOOS=linux   GOARCH=amd64 CGO_ENABLED=0 go build -ldflags '${LDFLAGS}' -o release/linux/amd64/plugin-s3
+	GOOS=linux   GOARCH=arm64 CGO_ENABLED=0 go build -ldflags '${LDFLAGS}' -o release/linux/arm64/plugin-s3
+	GOOS=linux   GOARCH=arm   CGO_ENABLED=0 go build -ldflags '${LDFLAGS}' -o release/linux/arm/plugin-s3
+	GOOS=windows GOARCH=amd64 CGO_ENABLED=0 go build -ldflags '${LDFLAGS}' -o release/windows/amd64/plugin-s3
+	GOOS=darwin  GOARCH=amd64 CGO_ENABLED=0 go build -ldflags '${LDFLAGS}' -o release/darwin/amd64/plugin-s3
+	GOOS=darwin  GOARCH=arm64 CGO_ENABLED=0 go build -ldflags '${LDFLAGS}' -o release/darwin/arm64/plugin-s3
+
+.PHONY: version
+version:
+	@echo ${VERSION}

main.go

@@ -1,24 +1,20 @@
 package main
 
 import (
-	"fmt"
 	"os"
 
 	"github.com/joho/godotenv"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
 )
 
-var (
-	version = "0.0.0"
-	build   = "0"
-)
+var version = "0.0.0+0"
 
 func main() {
 	app := cli.NewApp()
 	app.Name = "s3 plugin"
 	app.Usage = "s3 plugin"
-	app.Version = fmt.Sprintf("%s+%s", version, build)
+	app.Version = version
 	app.Action = run
 	app.Flags = []cli.Flag{
 		cli.StringFlag{