makefile: Add generate target to generate service code

Makefile

@@ -16,6 +16,7 @@ help:
 	@echo "Please use \`make <target>\` where <target> is one of"
 	@echo "  all               to check, build, test and release this SDK"
 	@echo "  check             to vet and lint the SDK"
+	@echo "  generate          to generate service code"
 	@echo "  build             to build the SDK"
 	@echo "  unit              to run all sort of unit tests except runtime"
 	@echo "  unit-test         to run unit test"
@@ -44,6 +45,23 @@ lint:
 	 if [[ -n $${lint} ]]; then echo "$${lint}"; exit 1; fi
 	@echo "ok"
 
+generate: snips-v0.0.9.exe ../qingcloud-api-specs/package.json
+	./snips-v0.0.9.exe \
+		-s=${shell go env GOPATH}/src/github.com/yunify \
+		-m=qingcloud-api-specs \
+		-n=2013-08-30 \
+		-t=./template \
+		-o=./service
+	go fmt ./service/...
+	@echo "ok"
+
+snips-v0.0.9.exe:
+	go run build/get-snips-v0.0.9.go
+
+../qingcloud-api-specs/package.json:
+	-go get -d github.com/yunify/qingcloud-api-specs
+	file %@
+
 build:
 	@echo "build the SDK"
 	GOOS=linux GOARCH=amd64 go build ${PKGS_TO_CHECK}
@@ -51,6 +69,7 @@ build:
 	GOOS=windows GOARCH=amd64 go build ${PKGS_TO_CHECK}
 	@echo "ok"
 
+
 unit: unit-test unit-benchmark unit-coverage unit-race
 
 unit-test:

build/get-snips-v0.0.9.go

@@ -0,0 +1,111 @@
+// +-------------------------------------------------------------------------
+// | Copyright (C) 2017 Yunify, Inc.
+// +-------------------------------------------------------------------------
+// | Licensed under the Apache License, Version 2.0 (the "License");
+// | you may not use this work except in compliance with the License.
+// | You may obtain a copy of the License in the LICENSE file, or at:
+// |
+// | http://www.apache.org/licenses/LICENSE-2.0
+// |
+// | Unless required by applicable law or agreed to in writing, software
+// | distributed under the License is distributed on an "AS IS" BASIS,
+// | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// | See the License for the specific language governing permissions and
+// | limitations under the License.
+// +-------------------------------------------------------------------------
+
+// +build ignore
+
+// download snips binrary.
+//
+// Examples:
+//
+//	go run get-snips.go
+//	go run get-snips.go -os=windows -output=snips.exe
+//
+package main
+
+import (
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
+	"crypto/tls"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"runtime"
+)
+
+var (
+	flagOS       = flag.String("os", runtime.GOOS, "Specify the os (windows|darwin|linux)")
+	flagFileName = flag.String("output", "snips-v0.0.9.exe", "Specify the output filename")
+)
+
+func main() {
+	flag.Parse()
+
+	var snipsURL string
+	switch *flagOS {
+	case "windows", "darwin", "linux":
+		const baseURL = "https://github.com/yunify/snips/releases/"
+		snipsURL = fmt.Sprintf("%s/download/v0.0.9/snips-v0.0.9-%s_amd64.tar.gz", baseURL, *flagOS)
+	default:
+		log.Fatalf("invalid os: %v", *flagOS)
+	}
+
+	data, err := fetchTarGzFile(snipsURL)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = ioutil.WriteFile(*flagFileName, data, 0777)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Println("download snips-v0.0.9 ok")
+}
+
+func fetchTarGzFile(downloadURL string) ([]byte, error) {
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+	}
+	client := &http.Client{Transport: tr}
+
+	resp, err := client.Get(downloadURL)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	return readTarGz(resp.Body)
+}
+
+func readTarGz(r io.Reader) ([]byte, error) {
+	gr, err := gzip.NewReader(r)
+	if err != nil {
+		return nil, err
+	}
+	defer gr.Close()
+
+	// tar read
+	tr := tar.NewReader(gr)
+	for {
+		if _, err := tr.Next(); err != nil {
+			if err == io.EOF {
+				break
+			}
+			return nil, err
+		}
+		var buf bytes.Buffer
+		if _, err := io.Copy(&buf, tr); err != nil {
+			return nil, err
+		}
+		return buf.Bytes(), nil
+	}
+
+	return nil, nil
+}