Don't rely exclusively on /etc/timezone

config/cli.go

@@ -17,6 +17,7 @@ func (c *Config) declareFlags() {
 	flag.StringVar(&c.ActionsDir, "actions-dir", c.ActionsDir, "Path to the directory containing the actions")
 	flag.StringVar(&c.RoutinesDir, "routines-dir", c.RoutinesDir, "Path to the directory containing the routines")
 	flag.IntVar(&c.SampleRate, "samplerate", c.SampleRate, "Samplerate for unifying output stream")
+	flag.Var(&c.Timezone, "timezone", "Timezone to use when dealing with times")
 
 	// Others flags are declared in some other files when they need specials configurations
 }

config/config.go

@@ -18,6 +18,7 @@ type Config struct {
 	ActionsDir   string
 	RoutinesDir  string
 
+	Timezone   Timezone
 	SampleRate int
 }
 

config/custom.go

@@ -3,6 +3,7 @@ package config
 import (
 	"encoding/base64"
 	"net/url"
+	"time"
 )
 
 type JWTSecretKey []byte
@@ -42,3 +43,33 @@ func (i *URL) Set(value string) error {
 	i.URL = u
 	return nil
 }
+
+type Timezone struct {
+	tz *time.Location
+}
+
+func (tz *Timezone) GetLocation() *time.Location {
+	if tz.tz != nil {
+		return tz.tz
+	} else {
+		return time.Local
+	}
+}
+
+func (tz *Timezone) String() string {
+	if tz.tz != nil {
+		return tz.tz.String()
+	} else {
+		return time.Local.String()
+	}
+}
+
+func (tz *Timezone) Set(value string) error {
+	newtz, err := time.LoadLocation(value)
+	if err != nil {
+		return err
+	}
+
+	tz.tz = newtz
+	return nil
+}