adding example

Signed-off-by: Christopher Hein <[email protected]>

Author: christopherhein

example/main.go

@@ -0,0 +1,20 @@
+/*
+Copyright © 2019 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 main
+
+func main() {
+	Execute()
+}

example/root.go

@@ -0,0 +1,97 @@
+/*
+Copyright © 2019 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 main
+
+import (
+  "fmt"
+  "os"
+  "github.com/spf13/cobra"
+
+  homedir "github.com/mitchellh/go-homedir"
+  "github.com/spf13/viper"
+
+)
+
+
+var cfgFile string
+
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+  Use:   "example",
+  Short: "A brief description of your application",
+  Long: `A longer description that spans multiple lines and likely contains
+examples and usage of using your application. 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.`,
+  // 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() {
+  if err := rootCmd.Execute(); err != nil {
+    fmt.Println(err)
+    os.Exit(1)
+  }
+}
+
+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/.example.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 := homedir.Dir()
+    if err != nil {
+      fmt.Println(err)
+      os.Exit(1)
+    }
+
+    // Search config in home directory with name ".example" (without extension).
+    viper.AddConfigPath(home)
+    viper.SetConfigName(".example")
+  }
+
+  viper.AutomaticEnv() // read in environment variables that match
+
+  // If a config file is found, read it in.
+  if err := viper.ReadInConfig(); err == nil {
+    fmt.Println("Using config file:", viper.ConfigFileUsed())
+  }
+}
+

example/version.go

@@ -0,0 +1,39 @@
+/*
+Copyright © 2019 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 main
+
+import (
+	"github.com/spf13/cobra"
+	goVersion "go.hein.dev/go-version"
+)
+
+var (
+	shortened  = false
+	version    = "dev"
+	commit     = "none"
+	date       = "unknown"
+	versionCmd = &cobra.Command{
+		Use:   "version",
+		Short: "Version will output the current build information",
+		Long:  ``,
+		Run:   goVersion.Func(shortened, version, commit, date),
+	}
+)
+
+func init() {
+	versionCmd.Flags().BoolVarP(&shortened, "short", "s", false, "Use shortened output for version information.")
+	rootCmd.AddCommand(versionCmd)
+}

hack/build_example.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+commitSHA=$(git describe --dirty --always)
+dateStr=$(date +%s)
+
+go build -ldflags "-X main.commit=${commitSHA} -X main.date=${dateStr}" -o ./example/example ./example/