update

.gitignore

@@ -1,2 +1,5 @@
 # Created by .ignore support plugin (hsz.mobi)
-.idea
+.idea
+
+gdocs
+lang.json

cmd/excelToJson.go

@@ -0,0 +1,85 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License 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.
+
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"google.golang.org/api/sheets/v4"
+	"log"
+)
+
+// excelToJsonCmd represents the excelToJson command
+var excelToJsonCmd = &cobra.Command{
+	Use:   "excelToJson",
+	Short: "A brief description of your command",
+	Long: `A longer description that spans multiple lines and likely contains examples
+and usage of using your command. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		client = initClient()
+		service, err := sheets.New(client)
+		if err != nil {
+			log.Fatalf("Unable to retrieve Sheets Client %v", err)
+		}
+
+		if sheetId == "" {
+			log.Fatalf("Need set sheet id use -i")
+		}
+
+		if readRange == "" {
+			log.Fatalf("Need set read range use -r")
+		}
+
+		if jsonFile == "" {
+			log.Fatalf("Need set json file use -j")
+		}
+
+		ranges := []string{"A1:A300", "C1:C300"} // TODO: Update placeholder value.
+
+		resp, err := service.Spreadsheets.Values.BatchGet(sheetId).Ranges(ranges...).Do()
+		if err != nil {
+			log.Fatalf("Unable to retrieve data from sheet. %v", err)
+		}
+
+		if len(resp.ValueRanges) > 0 {
+			fmt.Println("Name, Major:")
+			for column, row := range resp.ValueRanges {
+				// Print columns A and E, which correspond to indices 0 and 4.
+				fmt.Println(column , row)
+			}
+		} else {
+			fmt.Print("No data found.")
+		}
+	},
+}
+
+func init() {
+	RootCmd.AddCommand(excelToJsonCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// excelToJsonCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// excelToJsonCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}

cmd/init.go

@@ -0,0 +1,153 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License 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.
+
+package cmd
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"net/url"
+	"os"
+	"os/user"
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+	"golang.org/x/net/context"
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/sheets/v4"
+)
+
+var client *http.Client
+
+// initCmd represents the init command
+var initCmd = &cobra.Command{
+	Use:   "init",
+	Short: "A brief description of your command",
+	Long: `A longer description that spans multiple lines and likely contains examples
+and usage of using your command. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		client = initClient()
+	},
+}
+
+func init() {
+	RootCmd.AddCommand(initCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// initCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// initCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+
+}
+
+func initClient() *http.Client {
+	ctx := context.Background()
+	sBytes, err := ioutil.ReadFile("client_secret.json")
+	if err != nil {
+		log.Fatalf("Unable to read client secret file: %v", err)
+	}
+
+	// If modifying these scopes, delete your previously saved credentials
+	// at ~/.credentials/sheets.googleapis.com-go-quickstart.json
+	config, err := google.ConfigFromJSON(sBytes, sheets.SpreadsheetsScope)
+	if err != nil {
+		log.Fatalf("Unable to parse client secret file to config: %v", err)
+	}
+	return getClient(ctx, config)
+}
+
+// getClient uses a Context and Config to retrieve a Token
+// then generate a Client. It returns the generated Client.
+func getClient(ctx context.Context, config *oauth2.Config) *http.Client {
+	cacheFile, err := tokenCacheFile()
+	if err != nil {
+		log.Fatalf("Unable to get path to cached credential file. %v", err)
+	}
+	tok, err := tokenFromFile(cacheFile)
+	if err != nil {
+		tok = getTokenFromWeb(config)
+		saveToken(cacheFile, tok)
+	}
+	return config.Client(ctx, tok)
+}
+
+// getTokenFromWeb uses Config to request a Token.
+// It returns the retrieved Token.
+func getTokenFromWeb(config *oauth2.Config) *oauth2.Token {
+	authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
+	fmt.Printf("Go to the following link in your browser then type the "+
+		"authorization code: \n%v\n", authURL)
+
+	var code string
+	if _, err := fmt.Scan(&code); err != nil {
+		log.Fatalf("Unable to read authorization code %v", err)
+	}
+
+	tok, err := config.Exchange(oauth2.NoContext, code)
+	if err != nil {
+		log.Fatalf("Unable to retrieve token from web %v", err)
+	}
+	return tok
+}
+
+// tokenCacheFile generates credential file path/filename.
+// It returns the generated credential path/filename.
+func tokenCacheFile() (string, error) {
+	usr, err := user.Current()
+	if err != nil {
+		return "", err
+	}
+	tokenCacheDir := filepath.Join(usr.HomeDir, ".credentials")
+	os.MkdirAll(tokenCacheDir, 0700)
+	return filepath.Join(tokenCacheDir,
+		url.QueryEscape("sheets.googleapis.com-go-quickstart.json")), err
+}
+
+// tokenFromFile retrieves a Token from a given file path.
+// It returns the retrieved Token and any read error encountered.
+func tokenFromFile(file string) (*oauth2.Token, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+	t := &oauth2.Token{}
+	err = json.NewDecoder(f).Decode(t)
+	defer f.Close()
+	return t, err
+}
+
+// saveToken uses a file path to create a file and store the
+// token in it.
+func saveToken(file string, token *oauth2.Token) {
+	fmt.Printf("Saving credential file to: %s\n", file)
+	f, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		log.Fatalf("Unable to cache oauth token: %v", err)
+	}
+	defer f.Close()
+	json.NewEncoder(f).Encode(token)
+}