Add goreleaser to perform release (#4)

.gitignore

@@ -0,0 +1,2 @@
+/kroki
+/dist/

.goreleaser.yml

@@ -0,0 +1,28 @@
+project_name: kroki-cli
+
+before:
+  hooks:
+    - go mod download
+
+builds:
+  - env:
+      - CGO_ENABLED=0
+  - binary: kroki
+    goos:
+      - windows
+      - darwin
+      - linux
+      - openbsd
+    goarch:
+      - amd64
+
+archive:
+  format_overrides:
+    - goos: windows
+      format: zip
+
+release:
+  github:
+    owner: yuzutech
+    name: kroki-cli
+  draft: true

.travis.yml

@@ -11,5 +11,23 @@ install:
 - go mod vendor
 
 script:
-- go test -race ./...
-- golangci-lint run .
+- make test
+- make lint
+
+jobs:
+  include:
+    - stage: goreleaser-snapshot
+      go: "1.11.x"
+      script:
+        - curl -sL https://git.io/goreleaser | head -n -2 | bash
+        - tar -xf /tmp/goreleaser.tar.gz -C $GOPATH/bin
+        - goreleaser --snapshot --skip-sign
+    - stage: goreleaser-release
+      go: "1.11.x"
+      if: |
+        repo = 'yuzutech/kroki-cli' AND \
+        tag IS present
+      script:
+        - curl -sL https://git.io/goreleaser | head -n -2 | bash
+        - tar -xf /tmp/goreleaser.tar.gz -C $GOPATH/bin
+        - goreleaser --skip-sign

Makefile

@@ -0,0 +1,23 @@
+version := $(shell git describe --exact-match --tags $(git log -n1 --pretty='%h') 2> /dev/null || echo 'latest')
+vcs_ref := $(shell git rev-parse HEAD)
+
+GO_FILES = $(shell find . -type f -name '*.go')
+
+.PHONY: all
+all: clean kroki
+
+kroki: $(GO_FILES)
+	go build -o $@ -ldflags "-s -w -X main.version=${version} -X main.commit=${vcs_ref}"
+
+.PHONY: lint
+lint: $(GO_FILES)
+	golangci-lint run ./...
+
+.PHONY: test
+test: $(GO_FILES)
+	go test -race ./...
+
+.PHONY: clean
+clean:
+	go clean
+	rm -rf kroki