add(config): import global config pkg

config/database.go

@@ -0,0 +1,34 @@
+package config
+
+import (
+	"github.com/namsral/flag"
+	"github.com/pkg/errors"
+)
+
+type (
+	Database struct {
+		DSN      string
+		Profiler string
+	}
+)
+
+func (c *Database) Validate() error {
+	if c == nil {
+		return nil
+	}
+	if c.DSN == "" {
+		return errors.New("No DB DSN is set, can't connect to database")
+	}
+	return nil
+}
+
+func (c *Database) Init(prefix ...string) *Database {
+	p := func(s string) string {
+		return prefix[0] + "-" + s
+	}
+
+	flag.StringVar(&c.DSN, p("db-dsn"), "crust:crust@tcp(db1:3306)/crust?collation=utf8mb4_general_ci", "DSN for database connection")
+	flag.StringVar(&c.Profiler, p("db-profiler"), "", "Profiler for DB queries (none, stdout)")
+
+	return c
+}

config/http.go

@@ -0,0 +1,40 @@
+package config
+
+import (
+	"github.com/namsral/flag"
+	"github.com/pkg/errors"
+)
+
+type (
+	HTTP struct {
+		Addr    string
+		Logging bool
+		Pretty  bool
+		Tracing bool
+		Metrics bool
+	}
+)
+
+func (c *HTTP) Validate() error {
+	if c == nil {
+		return nil
+	}
+	if c.Addr == "" {
+		return errors.New("No HTTP Addr is set, can't listen for HTTP")
+	}
+	return nil
+}
+
+func (c *HTTP) Init(prefix ...string) *HTTP {
+	p := func(s string) string {
+		return prefix[0] + "-" + s
+	}
+
+	flag.StringVar(&c.Addr, p("http-addr"), ":3000", "Listen address for HTTP server")
+	flag.BoolVar(&c.Logging, p("http-log"), true, "Enable/disable HTTP request log")
+	flag.BoolVar(&c.Pretty, p("http-pretty-json"), false, "Prettify returned JSON output")
+	flag.BoolVar(&c.Tracing, p("http-error-tracing"), false, "Return error stack frame")
+	flag.BoolVar(&c.Metrics, p("http-metrics"), false, "Provide metrics export for prometheus")
+
+	return c
+}

config/jwt.go

@@ -0,0 +1,31 @@
+package config
+
+import (
+	"github.com/namsral/flag"
+	"github.com/pkg/errors"
+)
+
+type (
+	JWT struct {
+		Secret     string
+		Expiry     int64
+		DebugToken bool
+	}
+)
+
+func (c *JWT) Validate() error {
+	if c == nil {
+		return nil
+	}
+	if c.Secret == "" {
+		return errors.New("JWT Secret not set for AUTH")
+	}
+	return nil
+}
+
+func (c *JWT) Init(prefix ...string) *JWT {
+	flag.StringVar(&c.Secret, "auth-jwt-secret", "", "JWT Secret")
+	flag.Int64Var(&c.Expiry, "auth-jwt-expiry", 3600, "JWT Expiration in minutes")
+	flag.BoolVar(&c.DebugToken, "auth-jwt-debug", false, "Generate debug JWT key")
+	return c
+}