Add initial project structure

With this commit I have prepared a full basic project structure, so far it doesn't embed phoenix itself and also no kit parts. It includes the whole Drone pipeline to continously publish binaries on push and on tag to our download mirrors (will be available at https://download.owncloud.com/reva/phoenix) and also publishes Docker images at owncloud/reva-phonix. For the Docker image auto_tag is enabled, which means latest is always based on the master branch and tags are automatically converted to minor, major and patch release tags.

pkg/command/command.go

@@ -0,0 +1,102 @@
+package command
+
+import (
+	"os"
+	"strings"
+
+	"github.com/owncloud/reva-hyper/pkg/version"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// Root is the entry point for the reva-phoenix command.
+func Root() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:     "reva-hyper",
+		Short:   "ownCloud infinite scale stack",
+		Long:    ``,
+		Version: version.String,
+		PersistentPreRun: func(cmd *cobra.Command, args []string) {
+			setupLogger()
+			setupConfig()
+		},
+	}
+
+	cmd.PersistentFlags().String("log-level", "", "Set logging level")
+	viper.BindPFlag("log.level", cmd.PersistentFlags().Lookup("log-level"))
+	viper.SetDefault("log.level", "info")
+	viper.BindEnv("log.level", "HYPER_LOG_LEVEL")
+
+	cmd.PersistentFlags().Bool("log-pretty", false, "Enable pretty logging")
+	viper.BindPFlag("log.pretty", cmd.PersistentFlags().Lookup("log-pretty"))
+	viper.SetDefault("log.pretty", true)
+	viper.BindEnv("log.pretty", "HYPER_LOG_PRETTY")
+
+	cmd.PersistentFlags().Bool("log-color", false, "Enable colored logging")
+	viper.BindPFlag("log.color", cmd.PersistentFlags().Lookup("log-color"))
+	viper.SetDefault("log.color", true)
+	viper.BindEnv("log.color", "HYPER_LOG_COLOR")
+
+	cmd.AddCommand(Phoenix())
+	cmd.AddCommand(Health())
+
+	return cmd
+}
+
+func setupLogger() {
+	switch strings.ToLower(viper.GetString("log.level")) {
+	case "panic":
+		zerolog.SetGlobalLevel(zerolog.PanicLevel)
+	case "fatal":
+		zerolog.SetGlobalLevel(zerolog.FatalLevel)
+	case "error":
+		zerolog.SetGlobalLevel(zerolog.ErrorLevel)
+	case "warn":
+		zerolog.SetGlobalLevel(zerolog.WarnLevel)
+	case "info":
+		zerolog.SetGlobalLevel(zerolog.InfoLevel)
+	case "debug":
+		zerolog.SetGlobalLevel(zerolog.DebugLevel)
+	default:
+		zerolog.SetGlobalLevel(zerolog.InfoLevel)
+	}
+
+	if viper.GetBool("log.pretty") {
+		log.Logger = log.Output(
+			zerolog.ConsoleWriter{
+				Out:     os.Stderr,
+				NoColor: !viper.GetBool("log.color"),
+			},
+		)
+	}
+}
+
+func setupConfig() {
+	viper.SetConfigName("hyper")
+
+	viper.AddConfigPath("/etc/reva")
+	viper.AddConfigPath("$HOME/.reva")
+	viper.AddConfigPath("./config")
+
+	if err := viper.ReadInConfig(); err != nil {
+		switch err.(type) {
+		case viper.ConfigFileNotFoundError:
+			log.Debug().
+				Msg("Continue without config")
+		case viper.UnsupportedConfigError:
+			log.Fatal().
+				Msg("Unsupported config type")
+		default:
+			if e := log.Debug(); e.Enabled() {
+				log.Fatal().
+					Err(err).
+					Msg("Failed to read config")
+			} else {
+				log.Fatal().
+					Msg("Failed to read config")
+			}
+		}
+	}
+}