rename folder extensions -> services

Signed-off-by: Christian Richter <crichter@owncloud.com>

services/nats/pkg/config/config.go

@@ -0,0 +1,29 @@
+package config
+
+import (
+	"context"
+
+	"github.com/owncloud/ocis/v2/ocis-pkg/shared"
+)
+
+// Config combines all available configuration parts.
+type Config struct {
+	Commons *shared.Commons `yaml:"-"` // don't use this directly as configuration for a service
+
+	Service Service `yaml:"-"`
+
+	Log   *Log  `yaml:"log"`
+	Debug Debug `yaml:"debug"`
+
+	Nats Nats `ociConfig:"nats"`
+
+	Context context.Context `yaml:"-"`
+}
+
+// Nats is the nats config
+type Nats struct {
+	Host      string `yaml:"host" env:"NATS_NATS_HOST" desc:"Bind address."`
+	Port      int    `yaml:"port" env:"NATS_NATS_PORT" desc:"Bind port:"`
+	ClusterID string `yaml:"clusterid" env:"NATS_NATS_CLUSTER_ID" desc:"ID of the NATS cluster."`
+	StoreDir  string `yaml:"store_dir" env:"NATS_NATS_STORE_DIR" desc:"Path for the NATS JetStream persistence directory."`
+}

services/nats/pkg/config/debug.go

@@ -0,0 +1,9 @@
+package config
+
+// Debug defines the available debug configuration.
+type Debug struct {
+	Addr   string `yaml:"addr" env:"NATS_DEBUG_ADDR" desc:"Bind address of the debug server, where metrics, health, config and debug endpoints will be exposed."`
+	Token  string `yaml:"token" env:"NATS_DEBUG_TOKEN" desc:"Token to secure the metrics endpoint"`
+	Pprof  bool   `yaml:"pprof" env:"NATS_DEBUG_PPROF" desc:"Enables pprof, which can be used for profiling"`
+	Zpages bool   `yaml:"zpages" env:"NATS_DEBUG_ZPAGES" desc:"Enables zpages, which can be used for collecting and viewing in-memory traces."`
+}

services/nats/pkg/config/defaults/defaultconfig.go

@@ -0,0 +1,53 @@
+package defaults
+
+import (
+	"path"
+
+	"github.com/owncloud/ocis/v2/extensions/nats/pkg/config"
+	"github.com/owncloud/ocis/v2/ocis-pkg/config/defaults"
+)
+
+// NOTE: Most of this configuration is not needed to keep it as simple as possible
+// TODO: Clean up unneeded configuration
+
+func FullDefaultConfig() *config.Config {
+	cfg := DefaultConfig()
+	EnsureDefaults(cfg)
+	Sanitize(cfg)
+	return cfg
+}
+
+func DefaultConfig() *config.Config {
+	return &config.Config{
+		Debug: config.Debug{
+			Addr: "127.0.0.1:9234",
+		},
+		Service: config.Service{
+			Name: "nats",
+		},
+		Nats: config.Nats{
+			Host:      "127.0.0.1",
+			Port:      9233,
+			ClusterID: "ocis-cluster",
+			StoreDir:  path.Join(defaults.BaseDataPath(), "nats"),
+		},
+	}
+}
+
+func EnsureDefaults(cfg *config.Config) {
+	// provide with defaults for shared logging, since we need a valid destination address for BindEnv.
+	if cfg.Log == nil && cfg.Commons != nil && cfg.Commons.Log != nil {
+		cfg.Log = &config.Log{
+			Level:  cfg.Commons.Log.Level,
+			Pretty: cfg.Commons.Log.Pretty,
+			Color:  cfg.Commons.Log.Color,
+			File:   cfg.Commons.Log.File,
+		}
+	} else if cfg.Log == nil {
+		cfg.Log = &config.Log{}
+	}
+}
+
+func Sanitize(cfg *config.Config) {
+	// nothing to sanitize here atm
+}

services/nats/pkg/config/log.go

@@ -0,0 +1,9 @@
+package config
+
+// Log defines the available log configuration.
+type Log struct {
+	Level  string `mapstructure:"level" env:"OCIS_LOG_LEVEL;NATS_LOG_LEVEL" desc:"The log level. Valid values are: \"panic\", \"fatal\", \"error\", \"warn\", \"info\", \"debug\", \"trace\"."`
+	Pretty bool   `mapstructure:"pretty" env:"OCIS_LOG_PRETTY;NATS_LOG_PRETTY" desc:"Activates pretty log output."`
+	Color  bool   `mapstructure:"color" env:"OCIS_LOG_COLOR;NATS_LOG_COLOR" desc:"Activates colorized log output."`
+	File   string `mapstructure:"file" env:"OCIS_LOG_FILE;NATS_LOG_FILE" desc:"The path to the log file. Activates logging to this file if set."`
+}

services/nats/pkg/config/parser/parse.go

@@ -0,0 +1,37 @@
+package parser
+
+import (
+	"errors"
+
+	"github.com/owncloud/ocis/v2/extensions/nats/pkg/config"
+	"github.com/owncloud/ocis/v2/extensions/nats/pkg/config/defaults"
+	ociscfg "github.com/owncloud/ocis/v2/ocis-pkg/config"
+
+	"github.com/owncloud/ocis/v2/ocis-pkg/config/envdecode"
+)
+
+// ParseConfig loads configuration from known paths.
+func ParseConfig(cfg *config.Config) error {
+	_, err := ociscfg.BindSourcesToStructs(cfg.Service.Name, cfg)
+	if err != nil {
+		return err
+	}
+
+	defaults.EnsureDefaults(cfg)
+
+	// load all env variables relevant to the config in the current context.
+	if err := envdecode.Decode(cfg); err != nil {
+		// no environment variable set for this config is an expected "error"
+		if !errors.Is(err, envdecode.ErrNoTargetFieldsAreSet) {
+			return err
+		}
+	}
+
+	defaults.Sanitize(cfg)
+
+	return Validate(cfg)
+}
+
+func Validate(cfg *config.Config) error {
+	return nil
+}

services/nats/pkg/config/service.go

@@ -0,0 +1,6 @@
+package config
+
+// Service defines the available service configuration.
+type Service struct {
+	Name string `yaml:"-"`
+}