第一个golang项目增加help指令并调整指令模式
上一篇文章
调整指令模式
-
version指令修改为
-v
和-version
-
replace指令修改为
-r
和-replace
-
dir参数修改为
-d
和-directory
package commands
import (
"flag"
"fmt"
"log"
"os"
"strings""github.com/spf13/viper"
)
var (
help bool
version bool
replace booldirectory string
)
func Init() {
flag.BoolVar(&help, "h", false, "thishelp
and exit")
flag.BoolVar(&help, "help", false, "thishelp
and exit")
flag.BoolVar(&version, "v", false, "showversion
and exit")
flag.BoolVar(&version, "version", false, "showversion
and exit")
flag.BoolVar(&replace, "r", false, "sendreplace
to process and replace content for scan files under directory.")
flag.BoolVar(&replace, "replace", false, "sendreplace
to process and replace content for scan files under directory.")// 注意 `directory`。默认是 -d string,有了 `directory` 之后,变为 -d directory flag.StringVar(&directory, "d", "", "send `directory` to process: standard, standard-fix, saas, saas-fix") flag.StringVar(&directory, "directory", "", "send `directory` to process: standard, standard-fix, saas, saas-fix") // 改变默认的 Usage flag.Usage = usage viper.SetConfigName("config") // 配置文件名(不包含扩展名) viper.SetConfigType("toml") // 配置文件格式 viper.AddConfigPath(".") // 查找配置文件的路径 if err := viper.ReadInConfig(); err != nil { log.Fatalf("Error reading config file, %s", err) } flag.Parse()
}
func usage() {
version := viper.Get("version").(string)
cmd := os.Args[0]
fmt.Fprintf(os.Stderr, `%s version: %s
Usage: %s [-hvq] [-d,directory directory]Options:
`, cmd, version, cmd)
flag.PrintDefaults()
}func Run() {
Init()if help { flag.Usage() } else if version { Version() } else if replace { dir := "standard" if strings.TrimSpace(directory) != "" { dir = directory } Replace(dir) } else { flag.Usage() }
}
增加help指令
-
-h
和-help
指令,打印程序已知参数列表及参数说明func usage() {
version := viper.Get("version").(string)
cmd := os.Args[0]
fmt.Fprintf(os.Stderr, `%s version: %s
Usage: %s [-hvq] [-d,directory directory]Options:
`, cmd, version, cmd)
flag.PrintDefaults()
}
减少了配置文件的解析读取次数
-
在程序执行初始化时解析一次,后续皆可使用
func Init() {
flag.BoolVar(&help, "h", false, "thishelp
and exit")
flag.BoolVar(&help, "help", false, "thishelp
and exit")
flag.BoolVar(&version, "v", false, "showversion
and exit")
flag.BoolVar(&version, "version", false, "showversion
and exit")
flag.BoolVar(&replace, "r", false, "sendreplace
to process and replace content for scan files under directory.")
flag.BoolVar(&replace, "replace", false, "sendreplace
to process and replace content for scan files under directory.")// 注意 `directory`。默认是 -d string,有了 `directory` 之后,变为 -d directory flag.StringVar(&directory, "d", "", "send `directory` to process: standard, standard-fix, saas, saas-fix") flag.StringVar(&directory, "directory", "", "send `directory` to process: standard, standard-fix, saas, saas-fix") // 改变默认的 Usage flag.Usage = usage viper.SetConfigName("config") // 配置文件名(不包含扩展名) viper.SetConfigType("toml") // 配置文件格式 viper.AddConfigPath(".") // 查找配置文件的路径 if err := viper.ReadInConfig(); err != nil { log.Fatalf("Error reading config file, %s", err) } flag.Parse()
}
新指令模式
func Run() {
Init()
if help {
flag.Usage()
} else if version {
Version()
} else if replace {
dir := "standard"
if strings.TrimSpace(directory) != "" {
dir = directory
}
Replace(dir)
} else {
flag.Usage()
}
}
打包并运行
go build -v -ldflags "-linkmode external -extldflags '-static' -w" -o devtools.exe main.go
devtools.exe -h
devtools.exe -help
devtools.exe -v
devtools.exe -version
devtools.exe -r -d saas
devtools.exe -replace -directory saas
https://gitee.com/xqxyxchy/dev-tools
尽情享用吧