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// vim: shiftwidth=4 tabstop=4 noexpandtab
package main
import (
"flag"
"log"
"os"
"io/ioutil"
"encoding/json"
)
var (
camera Camera
)
type config struct {
WebConfig webConfig `json:"webserver"`
}
func main() {
// read command line arguments
configPath := readFlags()
// set up log and print startup message
log.SetFlags(0) // disable timestamp because systemd takes care of that
log.Println("Starting birdscan")
// read config file
cfg := readConfig(configPath)
// setup camera state machine
camera = NewCamera()
// start goroutines
server := NewWebServer(&cfg.WebConfig)
go server.run() // http server
// run camera state machine
camera.run()
}
func readFlags() string {
var retval string
flag.StringVar(&retval, "c", "/etc/birdscan/config.json", "Path to birdscan configuration file")
flag.Parse()
return retval
}
func readConfig(path string) config {
log.Printf("Reading config file %s", path)
var retval config
// open the config file
configFile, err := os.Open(path)
defer configFile.Close()
if err != nil {
log.Fatalf("Could not open configuration file %s", path)
}
// read byte content
byteData, err := ioutil.ReadAll(configFile)
if err != nil {
log.Fatalf("Could not read configuration file %s", path)
}
// parse content to config structs
err = json.Unmarshal(byteData, &retval)
if err != nil {
log.Fatalf("Could not parse configuration file %s", path)
}
return retval
}
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