add init and setup command

Author: caojia

.envrc

@@ -1,2 +1,2 @@
-mkdir -p ~/.gip
+mkdir -p ~/.gip/gip
 export GOPATH=~/.gip/gip:$GOPATH

README.md

@@ -15,7 +15,9 @@ gip要解决什么问题？
 gip怎么做
 ===
 
-参考了 [vg](https://github.com/GetStream/vg) 和 [gigo](https://github.com/LyricalSecurity/gigo) 的思路，gip想要实现的是python中 [pip](https://pypi.python.org/pypi/pip) 的组合，再配合[direnv](https://github.com/direnv/direnv)来实现GOPATH的切换
+参考了 [vg](https://github.com/GetStream/vg) 和 [gigo](https://github.com/LyricalSecurity/gigo) 的思路，gip想要实现的是python中 [pip](https://pypi.python.org/pypi/pip) 的组合，再配合[direnv](https://github.com/direnv/direnv)来实现GOPATH的切换。
+
+NOTE：大量借鉴了[vg](https://github.com/GetStream/vg) 的代码设计和实现。
 
 1. 每次进入一个项目，自动激活这个项目的GOPATH
 	- 依赖direnv实现；在项目根目录下准备.envrc文件，当进入该文件夹时，自动将配置的GOPATH加到默认GOPATH之前； 
@@ -25,6 +27,15 @@ gip怎么做
 使用方法
 ===
 
+0. 安装gip
+	
+	```
+	# install gip
+	go get -u github.com/caojia/gip
+	# setup of direnv
+	gip setup
+	```
+
 1. 初始化一个项目
 
 	```

cmd/init.go

@@ -24,8 +24,7 @@ import (
 )
 
 var envrc = ".envrc"
-var template = `
-mkdir -p %[1]s
+var template = `mkdir -p %[1]s
 export GOPATH=%[1]s:$GOPATH
 `
 

cmd/root.go

@@ -73,7 +73,7 @@ func init() {
 	// will be global for your application.
 	//RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.gip.yaml)")
 	RootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "verbose mode")
-	RootCmd.PersistentFlags().BoolVarP(&ignoreGlobal, "ignore-global", false, "if it is set to true, none of the packages will be installed in global GOPATH.")
+	RootCmd.PersistentFlags().BoolVar(&ignoreGlobal, "ignore-global", false, "if it is set to true, none of the packages will be installed in global GOPATH.")
 
 	// Cobra also supports local flags, which will only run
 	// when this action is called directly.
@@ -112,6 +112,4 @@ func initConfig() {
 	if ignoreGlobal {
 		helper.IgnoreGlobal()
 	}
-
-	RootCmd.DebugFlags()
 }

cmd/setup.go

@@ -0,0 +1,102 @@
+// 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"
+	"os/exec"
+	"github.com/caojia/gip/log"
+	"runtime"
+)
+
+var direnvVersion = "v2.12.2"
+
+func setupBash() {
+	exec.Command("echo", "'eval $(direnv hook bash)'", ">>", "~/.bashrc")
+}
+
+func setupZsh() {
+	exec.Command("echo", "'eval $(direnv hook zsh)'", ">>", "~/.zshrc")
+}
+
+func setupDarwin() {
+	_, err := exec.Command("command", "-v", "brew").Output()
+	// if brew is installed, use brew, otherwise, use default
+	if err == nil {
+		output, err := exec.Command("brew", "install", "direnv").CombinedOutput()
+		if err != nil {
+			log.Error(string(output))
+			return
+		}
+	} else {
+		setupDefault()
+	}
+}
+
+func setupDefault() {
+	//https://github.com/direnv/direnv/releases/download/v2.12.2/direnv.darwin-386
+	url := fmt.Sprintf("https://github.com/direnv/direnv/releases/download/%s/direnv.%s-%s",
+		direnvVersion, runtime.GOOS, runtime.GOARCH)
+	exec.Command("mkdir", "-p", "~/bin")
+	exec.Command("wget", "-O", "~/bin/direnv", url)
+	exec.Command("chmod", "+x", "~/bin/direnv")
+}
+
+// setupCmd represents the setup command
+var setupCmd = &cobra.Command{
+	Use:   "setup",
+	Short: "Install and setup the required commands.",
+	Long: `Install and setup the required commands. Including:
+
+- install direnv
+- setup direnv for bash/zsh`,
+	Run: func(cmd *cobra.Command, args []string) {
+		_, err := exec.Command("command", "-v", "direnv").Output()
+		if err == nil {
+			log.Info(`direnv is already installed, please make sure it is set up properly.
+
+For more information, check out: https://github.com/direnv/direnv
+			`)
+			return
+		}
+		switch runtime.GOOS {
+		case "darwin":
+			setupDarwin()
+		case "windows":
+			panic("Sorry, we don't support windows yet.")
+		default:
+			setupDefault()
+		}
+
+		setupBash()
+		setupZsh()
+		log.Info(`If you're not using bash or zsh, please follow https://github.com/direnv/direnv to setup direnv for your shell.`)
+	},
+}
+
+func init() {
+	RootCmd.AddCommand(setupCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// setupCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// setupCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}