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|
package utils
import (
"fmt"
"log"
"flag"
"os"
"io/ioutil"
"encoding/json"
)
type RuntimeConfig struct {
Path string
Debug bool
Http HttpConfig `json:"http"`
Database DatabaseConfig `json:"database"`
}
type HttpConfig struct {
Host string `json:"bind_host"`
Port string `json:"bind_port"`
Static string `json:"static"`
Templates string `json:"templates"`
Storage string `json:"storage"`
}
type DatabaseConfig struct {
Socket string `json:"socket"`
User string `json:"user"`
Database string `json:"database"`
Debug bool
}
func GetRuntimeConfig() RuntimeConfig {
// init empty return value
config := RuntimeConfig{}
// read command line flags
flag.StringVar(&config.Path, "c", "/etc/ceres/config.json", "Path to ceres configuration file")
flag.BoolVar(&config.Debug, "d", false, "Use this flag if you are in a development environment")
flag.Parse()
// open config file
configFile, err := os.Open(config.Path)
defer configFile.Close()
if err != nil {
log.Fatalf("Could not open configuration file %s", config.Path)
}
// read byte content
configData, err := ioutil.ReadAll(configFile)
if err != nil {
log.Fatalf("Could not read configuration file %s", config.Path)
}
// parse content to config structs
err = json.Unmarshal(configData, &config)
if err != nil {
log.Fatalf("Could not parse configuration file %s", config.Path)
}
// override defaults if in debugging mode
if config.Debug {
config.Http.Static = "./data/static"
config.Http.Templates = "./data/templates"
config.Http.Storage = "./data/storage"
}
// copy debug value
config.Database.Debug = config.Debug
// print config if in debug mode
if config.Debug {
configuration,err := json.MarshalIndent(config, "", " ")
if err != nil {
log.Fatal(err)
}
fmt.Print("Used config: " + string(configuration) + "\n")
}
return config
}
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