/
config.go
126 lines (109 loc) · 2.85 KB
/
config.go
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package config
import (
"fmt"
"log"
"os"
"strconv"
"github.com/BurntSushi/toml"
)
type Config struct {
HostPort string `toml:"hostport"`
IPv4 string `toml:"ipv4"`
IPv6 string `toml:"ipv6"`
Refresh int `toml:"refresh"`
LastHeard int `toml:"lastheard"`
MrefFile string `toml:"mreffile"`
MrefPidFile string `toml:"mrefpidfile"`
Email string `toml:"email"`
Debug bool `toml:"debug"`
SubPath string `toml:"subpath"`
CallsignCountryFile string `toml:"callsigncountryfile"`
}
func checkEnvOrErrString(k string) (string, error) {
v, ok := os.LookupEnv(k)
if !ok {
return "", fmt.Errorf("%s not set", k)
}
return v, nil
}
func checkEnvOrErrInt(k string) (int, error) {
v, ok := os.LookupEnv(k)
if !ok {
return 0, fmt.Errorf("%s not set", k)
}
i, err := strconv.ParseInt(v, 10, 32)
return int(i), err
}
func NewConfigFromEnv() (*Config, error) {
prefix := "GOMREFDASH"
var config Config
var err error
config.HostPort, err = checkEnvOrErrString(prefix + "_HOSTPORT")
if err != nil {
return nil, err
}
config.Email, err = checkEnvOrErrString(prefix + "_EMAIL")
if err != nil {
return nil, err
}
config.IPv4, err = checkEnvOrErrString(prefix + "_IPV4")
if err != nil {
return nil, err
}
config.IPv6, err = checkEnvOrErrString(prefix + "_IPV6")
if err != nil {
return nil, err
}
config.LastHeard, err = checkEnvOrErrInt(prefix + "_LASTHEARD")
if err != nil {
return nil, err
}
config.MrefFile, err = checkEnvOrErrString(prefix + "_MREFFILE")
if err != nil {
return nil, err
}
config.MrefPidFile, err = checkEnvOrErrString(prefix + "_MREFPIDFILE")
if err != nil {
return nil, err
}
config.Refresh, err = checkEnvOrErrInt(prefix + "_REFRESH")
if err != nil {
return nil, err
}
config.SubPath, err = checkEnvOrErrString(prefix + "_SUBPATH")
if err != nil {
log.Println("warning: No SUBPATH defined, this is ok default to /")
}
config.CallsignCountryFile, err = checkEnvOrErrString(prefix + "_CALLSIGNCOUNTRYFILE")
if err != nil {
log.Println("warning: No CALLSIGNCOUNTRYFILE defined")
}
return &config, nil
}
func NewConfigFromFile(searchPaths []string) (*Config, error) {
foundFile := ""
for _, f := range searchPaths {
_, err := os.Stat(f)
if err != nil {
log.Printf("%s not found", f)
continue
}
log.Printf("%s found.", f)
foundFile = f
break
}
if foundFile == "" {
log.Println("no config files found, let's try reading from environment")
return NewConfigFromEnv()
}
b, err := os.ReadFile(foundFile)
if err != nil {
return nil, fmt.Errorf("unable to read configfile %s: %s", foundFile, err)
}
var config Config
err = toml.Unmarshal(b, &config)
if err != nil {
return nil, fmt.Errorf("unable to unmarshal %s into a Config: %s", foundFile, err)
}
return &config, nil
}