Initial commit

config/cli.go

@@ -0,0 +1,44 @@
+package config
+
+import (
+	"flag"
+)
+
+// declareFlags registers flags for the structure Options.
+func (c *Config) declareFlags() {
+	flag.StringVar(&c.BaseURL, "baseurl", c.BaseURL, "URL prepended to each URL")
+	flag.StringVar(&c.Bind, "bind", c.Bind, "Bind port/socket")
+	flag.StringVar(&c.DevProxy, "dev", c.DevProxy, "Use ui directory instead of embedded assets")
+
+	// Others flags are declared in some other files when they need specials configurations
+}
+
+func Consolidated() (cfg *Config, err error) {
+	// Define defaults options
+	cfg = &Config{
+		Bind: "127.0.0.1:8080",
+	}
+
+	cfg.declareFlags()
+
+	// Then, overwrite that by what is present in the environment
+	err = cfg.FromEnv()
+	if err != nil {
+		return
+	}
+
+	// Finaly, command line takes precedence
+	err = cfg.parseCLI()
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+// parseCLI parse the flags and treats extra args as configuration filename.
+func (c *Config) parseCLI() error {
+	flag.Parse()
+
+	return nil
+}