forked from KohlsTechnology/git2consul-go
/
main.go
110 lines (91 loc) · 2.51 KB
/
main.go
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/*
Copyright 2019 Kohl's Department Stores, Inc.
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 main
import (
"flag"
"fmt"
"os"
"os/signal"
"syscall"
"github.com/DNAlchemist/git2consul-go/config"
"github.com/DNAlchemist/git2consul-go/runner"
"github.com/apex/log"
"github.com/apex/log/handlers/text"
)
// Exit code represented as int values for particular errors.
const (
ExitCodeError = 10 + iota
ExitCodeFlagError
ExitCodeConfigError
ExitCodeOk int = 0
)
func main() {
var filename string
var version bool
var debug bool
var once bool
flag.StringVar(&filename, "config", "", "path to config file")
flag.BoolVar(&version, "version", false, "show version")
flag.BoolVar(&debug, "debug", false, "enable debugging mode")
flag.BoolVar(&once, "once", false, "run git2consul once and exit")
flag.Parse()
if debug {
log.SetLevel(log.DebugLevel)
}
if version {
fmt.Println("git2consul", "version", Version)
if GitCommit != "" {
fmt.Printf(" %-9s%s\n", "Build:", GitCommit)
}
return
}
// TODO: Accept other logger inputs
log.SetHandler(text.New(os.Stderr))
log.Infof("Starting git2consul version: %s", Version)
if len(filename) == 0 {
log.Error("No configuration file provided")
os.Exit(ExitCodeFlagError)
}
// Load configuration from file
cfg, err := config.Load(filename)
if err != nil {
log.Errorf("(config): %s", err)
os.Exit(ExitCodeConfigError)
}
runner, err := runner.NewRunner(cfg, once)
if err != nil {
log.Errorf("(runner): %s", err)
os.Exit(ExitCodeConfigError)
}
go runner.Start()
signalCh := make(chan os.Signal, 1)
signal.Notify(signalCh,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT,
)
for {
select {
case err := <-runner.ErrCh:
log.WithError(err).Error("Runner error")
os.Exit(ExitCodeError)
case <-runner.SndDoneCh: // Used for cases like -once, where program is not terminated by interrupt
log.Info("Terminating git2consul")
os.Exit(ExitCodeOk)
case <-signalCh:
log.Info("Received interrupt. Cleaning up...")
runner.Stop()
}
}
}