AymenSegni · AymenSegni · Aug 15, 2021 · Aug 15, 2021 · Aug 15, 2021 · Aug 15, 2021
diff --git a/go-gopher-cli/README.md b/go-gopher-cli/README.md
@@ -0,0 +1,63 @@
+# go-gopher-cli
+
+[![Go Report Card](https://goreportcard.com/badge/github.com/AymenSegni/go-examples/go-gopher-cli)](https://goreportcard.com/report/github.com/AymenSegni/go-examples/go-gopher-cli)
+
+This repo contains a simple CLI (Command Line Interface) application in Go, with a basic code organization.
+We use:
+* net/http package to retrieve our cute Gophers
+* Cobra for creating powerful modern CLI applications
+* Viper to ...
+
+go-gopher-cli use [Taskfile](https://dev.to/stack-labs/introduction-to-taskfile-a-makefile-alternative-h92) (a Makefile alternative). 
+
+## Pre-requisits
+
+Install Go in 1.16.x version minimum.
+
+## Build the app
+
+```bash
+go build -o bin/go-gopher-cli main.go
+``` 
+
+or
+
+```bash
+task build
+```
+
+## Run the app
+
+```bash
+./bin/go-gopher-cli
+```
+
+or
+
+```
+task run
+```
+
+## Test the app
+
+```bash
+./bin/gopher-cli
+Gopher CLI application written in Go.
+
+Usage:
+  go-gopher-cli [command]
+
+Available Commands:
+  completion  generate the autocompletion script for the specified shell
+  get         This command will return the requested Gopher if it exist
+  help        Help about any command
+...
+
+
+./bin/gopher-cli get friends
+Try to get 'friends' Gopher...
+Perfect! Just saved in friends.png!
+
+file friends.png
+friends.png: PNG image data, 1156 x 882, 8-bit/color RGBA, non-interlaced
+```
diff --git a/go-gopher-cli/bin/gopher-cli b/go-gopher-cli/bin/gopher-cli
diff --git a/go-gopher-cli/cmd/get.go b/go-gopher-cli/cmd/get.go
@@ -0,0 +1,82 @@
+/*
+Copyright © 2021 Aymen Segni: segniaymen1@gmail.com
+
+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"
+	"io"
+	"net/http"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+// getCmd represents the get command
+var getCmd = &cobra.Command{
+	Use:   "get",
+	Short: "This command will return the requested Gopher if it exist",
+	Long: "This get command will browse scraly/gophers repository and fetch the desired Gopher .",
+	Run: func(cmd *cobra.Command, args []string) {
+		// init the Gopher with var
+		var gopherName = "dr-who.png"
+
+		// make sure that the gopher given by the user isn't empty
+		if len (args) >= 1 && args[0] != "" {
+			gopherName = args[0]
+		}
+
+		// define the gopher URL
+
+		URL := "https://github.com/scraly/gophers/raw/main/" + gopherName + ".png"
+		fmt.Println("get'" + gopherName + "'Gopher ..")
+
+		// get the gopher content 
+		response, err := http.Get(URL)
+
+		// error handling
+		if err != nil {
+			fmt.Println(err)
+		}
+		// close function connection
+		defer response.Body.Close()
+
+		// in case we get the desired gopher
+		if response.StatusCode == 200 {
+			// create the gopher file locally 
+			out, err := os.Create(gopherName + ".png")
+
+		    defer out.Close()
+
+			// write body file
+			_, err = io.Copy(out, response.Body)
+			if err != nil {
+				fmt.Println(err)
+			}
+
+			// log the succeed msg 
+			fmt.Println("gopher is downloaded and saved successfly in " + out.Name())
+
+    	} else {
+            fmt.Println("Error: " + gopherName + " not exists! :-(")
+        }
+
+	},
+}
+
+// add getCmd comand
+func init() {
+	rootCmd.AddCommand(getCmd)
+}
diff --git a/go-gopher-cli/cmd/root.go b/go-gopher-cli/cmd/root.go
@@ -0,0 +1,80 @@
+/*
+Copyright © 2021 Aymen Segni: segniaymen1@gmail.com
+
+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"
+	"os"
+	"github.com/spf13/cobra"
+
+	"github.com/spf13/viper"
+)
+
+var cfgFile string
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "get",
+	Short: "This command will return the requested Gopher if it exist",
+	Long: "This get command will browse scraly/gophers repository and fetch the desired Gopher .",
+	// Uncomment the following line if your bare application
+	// has an action associated with it:
+	// Run: func(cmd *cobra.Command, args []string) { },
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	cobra.CheckErr(rootCmd.Execute())
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	// Here you will define your flags and configuration settings.
+	// Cobra supports persistent flags, which, if defined here,
+	// will be global for your application.
+
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.go-gopher-cli.yaml)")
+
+	// Cobra also supports local flags, which will only run
+	// when this action is called directly.
+	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := os.UserHomeDir()
+		cobra.CheckErr(err)
+
+		// Search config in home directory with name ".go-gopher-cli" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigType("yaml")
+		viper.SetConfigName(".go-gopher-cli")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Fprintln(os.Stderr, "Using config file:", viper.ConfigFileUsed())
+	}
+}
diff --git a/go-gopher-cli/go.mod b/go-gopher-cli/go.mod
@@ -0,0 +1,11 @@
+module github.com/AymenSegni/go-examples/go-gopher-cli
+
+go 1.16
+
+require (
+	github.com/spf13/cast v1.4.0 // indirect
+	github.com/spf13/cobra v1.2.1
+	github.com/spf13/viper v1.8.1
+	golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e // indirect
+	golang.org/x/text v0.3.7 // indirect
+)