From dd4ee2c7ac2f442526e5932f30463d2002715f1a Mon Sep 17 00:00:00 2001
From: yanue <yanue@outlook.com>
Date: Thu, 17 Jun 2021 17:35:38 +0800
Subject: [PATCH] support init gowatch.yml fix #33

---
 main.go | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/main.go b/main.go
index 67b9eb3..1c9e806 100644
--- a/main.go
+++ b/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"flag"
+	"fmt"
 	"os"
 	path "path/filepath"
 	"runtime"
@@ -16,6 +17,7 @@ var (
 	buildPkg    string
 	cmdArgs     string
 	showVersion bool
+	showHelp    bool
 
 	started chan bool
 )
@@ -25,6 +27,7 @@ func init() {
 	flag.StringVar(&buildPkg, "p", "", "go build packages")
 	flag.StringVar(&cmdArgs, "args", "", "app run args,separated by commas. like: -args='-host=:8080,-name=demo'")
 	flag.BoolVar(&showVersion, "v", false, "show version")
+	flag.BoolVar(&showHelp, "h", false, "help")
 }
 
 var ignoredFilesRegExps = []string{
@@ -34,9 +37,78 @@ var ignoredFilesRegExps = []string{
 	`(\w+).tmp$`,
 }
 
+var defaultYml = `
+# gowatch.yml configuration example
+
+# The name of the executable file generated under the current directory execution. The default is the current directory name.
+appname: "test"
+
+# Specify the command to run after builds done
+run_cmd: "./run.sh"
+
+# Specify the directory where the compiled object files are stored
+output: /bin/demo
+# The file name suffix that needs to be monitored. By default, there is only a '.go' file.
+watch_exts:
+    - .yml
+
+# The directory that needs to listen for file changes. By default, only the current directory.
+watch_paths:
+    - ../pk
+
+# Additional parameters that need to be added when running the application
+cmd_args:
+    - arg1=val1
+
+# Additional parameters that need to be added when building the application
+build_args:
+    - -race
+
+# Need to increase environment variables, the current environment variables are loaded by default
+envs:
+    - a=b
+
+# Whether to listen to file changes in the 'vendor' folder
+vendor_watch: false
+
+# Directory that do not need to listen for file changes
+excluded_paths:
+    - path
+
+# main package path, can also be a single file, multiple files separated by commas
+build_pkg: ""
+
+# build tags
+build_tags: ""
+
+# Commands that can be executed before build the app
+#prev_build_cmds:
+#  - swag init
+
+# Whether to prohibit automatic operation
+disable_run: false
+`
+
 func main() {
 	flag.Parse()
 
+	// init gowatch.yml
+	if len(os.Args) > 1 && os.Args[1] == "init" {
+		if _, err := os.Stat("gowatch.yml"); os.IsNotExist(err) {
+			_ = os.WriteFile("gowatch.yml", []byte(defaultYml), 0755)
+			fmt.Println("gowatch.yml file created to the current directory with the default settings")
+		} else {
+			fmt.Println("gowatch.yml has been exists")
+		}
+		os.Exit(0)
+	}
+
+	if showHelp {
+		fmt.Println("Usage of gowatch:\n\nIf no command is provided gowatch will start the runner with the provided flags\n\nCommands:\n  init  creates a gowatch.yml file with default settings to the current directory\n\nFlags:")
+		flag.PrintDefaults()
+		os.Exit(0)
+	}
+
 	if showVersion {
 		printVersion()
 		os.Exit(0)