Add some config through flag/env

config/config.go

@@ -0,0 +1,28 @@
+package config
+
+import (
+	"flag"
+	"strings"
+)
+
+type Config struct {
+	Dev         bool
+	Bind        string
+	ExternalURL string
+}
+
+// parseLine treats a config line and place the read value in the variable
+// declared to the corresponding flag.
+func (c *Config) parseLine(line string) (err error) {
+	fields := strings.SplitN(line, "=", 2)
+	orig_key := strings.TrimSpace(fields[0])
+	value := strings.TrimSpace(fields[1])
+
+	key := strings.TrimPrefix(orig_key, "MINIFAAS_")
+	key = strings.Replace(key, "_", "-", -1)
+	key = strings.ToLower(key)
+
+	err = flag.Set(key, value)
+
+	return
+}