initial commit

Makefile

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+default:
+	go build .

cmd/node.go

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+/*
+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 cmd
+
+import (
+	"fmt"
+	prettytable "github.com/tatsushid/go-prettytable"
+	"github.com/spf13/cobra"
+)
+
+type TableRow = map[string]string;
+type DataTable = map[int]TableRow;
+
+func formatOutputJson(rows DataTable) string {
+	return "json";
+}
+
+func formatOutputTable(rows DataTable) string {
+	tbl, err := prettytable.NewTable([]prettytable.Column{
+		{Header: "COL1"},
+		{Header: "COL2", MinWidth: 6},
+		{Header: "COL3", AlignRight: true},
+	}...)
+	if err != nil {
+		panic(err)
+	}
+	tbl.Separator = " | "
+
+	for row := range rows {
+		for cel := range row {
+			tbl.AddRow(cel)
+		}
+	}
+
+	tbl.Print()
+
+	return "table";
+}
+
+func formatOutput(rows DataTable) string {
+	output := "format: ";
+
+	switch rootCmd.Flag("format").Value.String() {
+	case "table": return formatOutputTable(rows);
+	case "json": return formatOutputJson(rows);
+	}
+
+	return output;
+}
+
+func nodeList(cmd *cobra.Command, args []string) {
+	rows := make(DataTable, 0);
+
+	row := make(TableRow);
+	row["name"] = "one";
+	rows[0] = row;
+
+
+	fmt.Println(formatOutput(rows))
+}
+
+// nodeCmd represents the node command
+var nodeCmd = &cobra.Command{
+	Use:   "node",
+	Short: "Node details",
+}
+
+var nodeListCmd = &cobra.Command {
+	Use: "list",
+	Run: nodeList,
+}
+
+func init() {
+	nodeCmd.AddCommand(nodeListCmd)
+	rootCmd.AddCommand(nodeCmd)
+	rootCmd.PersistentFlags().StringP("format", "f", "table", "output format");
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// nodeCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// nodeCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}

cmd/root.go

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+/*
+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 cmd
+
+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:   "upsilon",
+  Short: "The upsilon command.",
+}
+
+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/.upsilon-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")
+}
+
+
+func initConfig() {
+  if cfgFile != "" {
+    viper.SetConfigFile(cfgFile)
+  } else {
+    home, err := homedir.Dir()
+    if err != nil {
+      fmt.Println(err)
+      os.Exit(1)
+    }
+
+    viper.AddConfigPath(home)
+    viper.SetConfigName(".upsilon-cli")
+  }
+
+  viper.AutomaticEnv() // read in environment variables that match
+
+  if err := viper.ReadInConfig(); err == nil {
+    fmt.Println("Using config file:", viper.ConfigFileUsed())
+  }
+}
+

go.mod

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+module github.com/upsilonproject/upsilon-cli
+
+go 1.12
+
+require (
+	github.com/mattn/go-runewidth v0.0.4 // indirect
+	github.com/mitchellh/go-homedir v1.1.0
+	github.com/spf13/cobra v0.0.5
+	github.com/spf13/viper v1.3.2
+	github.com/tatsushid/go-prettytable v0.0.0-20141013043238-ed2d14c29939
+)

main.go

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+/*
+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/upsilonproject/upsilon-cli/cmd"
+
+func main() {
+  cmd.Execute()
+}