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main.go
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main.go
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package main
import (
"fmt"
"io"
"strings"
"github.com/MacroPower/go_template/internal/log"
"github.com/MacroPower/go_template/internal/version"
"github.com/alecthomas/kong"
)
const appName = "go_template"
var cli struct {
Log struct {
Level string `help:"Log level." default:"info"`
Format string `help:"Log format. One of: [logfmt, json]" default:"logfmt"`
} `prefix:"log." embed:""`
}
func main() {
cliCtx := kong.Parse(&cli, kong.Name(appName))
logLevel := &log.AllowedLevel{}
if err := logLevel.Set(cli.Log.Level); err != nil {
cliCtx.FatalIfErrorf(err)
}
logFormat := &log.AllowedFormat{}
if err := logFormat.Set(cli.Log.Format); err != nil {
cliCtx.FatalIfErrorf(err)
}
logger := log.New(&log.Config{
Level: logLevel,
Format: logFormat,
})
err := log.Info(logger).Log("msg", fmt.Sprintf("Starting %s", appName))
cliCtx.FatalIfErrorf(err)
version.LogInfo(logger)
version.LogBuildContext(logger)
sb := strings.Builder{}
Hello(&sb)
cliCtx.Printf("%s", sb.String())
}
func Hello(r io.Writer) {
_, err := r.Write([]byte("Hello World!"))
if err != nil {
panic(err)
}
}