GOPackageHeaderServer/cmd/gopkghsrv/main.go
Captain ALM b56c440ab7
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continuous-integration/drone Build is passing
Implement program.
2022-07-11 21:47:22 +01:00

106 lines
2.1 KiB
Go

package main
import (
"fmt"
"github.com/joho/godotenv"
"golang.captainalm.com/GOPackageHeaderServer/conf"
"golang.captainalm.com/GOPackageHeaderServer/web"
"gopkg.in/yaml.v3"
"log"
"os"
"os/signal"
"path"
"sync"
"syscall"
"time"
)
var (
buildVersion = "develop"
buildDate = ""
)
func main() {
log.Printf("[Main] Starting up GO Package Header Server #%s (%s)\n", buildVersion, buildDate)
y := time.Now()
//Hold main thread till safe shutdown exit:
wg := &sync.WaitGroup{}
wg.Add(1)
//Get working directory:
cwdDir, err := os.Getwd()
if err != nil {
log.Println(err)
}
//Load environment file:
err = godotenv.Load()
if err != nil {
log.Fatalln("Error loading .env file")
}
//Data directory processing:
dataDir := os.Getenv("DIR_DATA")
if dataDir == "" {
dataDir = path.Join(cwdDir, ".data")
}
check(os.MkdirAll(dataDir, 0777))
//Config loading:
configFile, err := os.Open(path.Join(dataDir, "config.yml"))
if err != nil {
log.Fatalln("Failed to open config.yml")
}
var configYml conf.ConfigYaml
groupsDecoder := yaml.NewDecoder(configFile)
err = groupsDecoder.Decode(&configYml)
if err != nil {
log.Fatalln("Failed to parse config.yml:", err)
}
//Server definitions:
log.Printf("[Main] Starting up HTTP server on %s...\n", configYml.Listen.Web)
webServer, _ := web.New(configYml)
//=====================
// Safe shutdown
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
//Startup complete:
z := time.Now().Sub(y)
log.Printf("[Main] Took '%s' to fully initialize modules\n", z.String())
go func() {
<-sigs
fmt.Printf("\n")
log.Printf("[Main] Attempting safe shutdown\n")
a := time.Now()
log.Printf("[Main] Shutting down HTTP server...\n")
err := webServer.Close()
if err != nil {
log.Println(err)
}
log.Printf("[Main] Signalling program exit...\n")
b := time.Now().Sub(a)
log.Printf("[Main] Took '%s' to fully shutdown modules\n", b.String())
wg.Done()
}()
//
//=====================
wg.Wait()
log.Println("[Main] Goodbye")
}
func check(err error) {
if err != nil {
panic(err)
}
}