migrate ocs to the new config scheme

ocis-pkg/config/config.go

@@ -120,7 +120,7 @@ func New() *Config {
 		IDP:           idp.DefaultConfig(),
 		Proxy:         proxy.DefaultConfig(),
 		GraphExplorer: graphExplorer.DefaultConfig(),
-		OCS:           ocs.New(),
+		OCS:           ocs.DefaultConfig(),
 		Web:           web.New(),
 		Settings:      settings.New(),
 		Storage:       storage.New(),

ocis/pkg/command/ocs.go

@@ -9,7 +9,6 @@ import (
 	"github.com/owncloud/ocis/ocis/pkg/register"
 	"github.com/owncloud/ocis/ocs/pkg/command"
 	svcconfig "github.com/owncloud/ocis/ocs/pkg/config"
-	"github.com/owncloud/ocis/ocs/pkg/flagset"
 	"github.com/urfave/cli/v2"
 )
 
@@ -19,7 +18,6 @@ func OCSCommand(cfg *config.Config) *cli.Command {
 		Name:     "ocs",
 		Usage:    "Start ocs server",
 		Category: "Extensions",
-		Flags:    flagset.ServerWithConfig(cfg.OCS),
 		Subcommands: []*cli.Command{
 			command.PrintVersion(cfg.OCS),
 		},

ocs/cmd/ocs/main.go

@@ -8,7 +8,7 @@ import (
 )
 
 func main() {
-	if err := command.Execute(config.New()); err != nil {
+	if err := command.Execute(config.DefaultConfig()); err != nil {
 		os.Exit(1)
 	}
 }

ocs/pkg/command/server.go

@@ -10,7 +10,6 @@ import (
 
 	"github.com/oklog/run"
 	"github.com/owncloud/ocis/ocs/pkg/config"
-	"github.com/owncloud/ocis/ocs/pkg/flagset"
 	"github.com/owncloud/ocis/ocs/pkg/metrics"
 	"github.com/owncloud/ocis/ocs/pkg/server/debug"
 	"github.com/owncloud/ocis/ocs/pkg/server/http"
@@ -22,26 +21,15 @@ func Server(cfg *config.Config) *cli.Command {
 	return &cli.Command{
 		Name:  "server",
 		Usage: "Start integrated server",
-		Flags: flagset.ServerWithConfig(cfg),
 		Before: func(ctx *cli.Context) error {
-			logger := NewLogger(cfg)
 			if cfg.HTTP.Root != "/" {
 				cfg.HTTP.Root = strings.TrimSuffix(cfg.HTTP.Root, "/")
 			}
 
-			if !cfg.Supervised {
-				return ParseConfig(ctx, cfg)
+			if err := ParseConfig(ctx, cfg); err != nil {
+				return err
 			}
-			if origins := ctx.StringSlice("cors-allowed-origins"); len(origins) != 0 {
-				cfg.HTTP.CORS.AllowedOrigins = origins
-			}
-			if methods := ctx.StringSlice("cors-allowed-methods"); len(methods) != 0 {
-				cfg.HTTP.CORS.AllowedMethods = methods
-			}
-			if headers := ctx.StringSlice("cors-allowed-headers"); len(headers) != 0 {
-				cfg.HTTP.CORS.AllowedOrigins = headers
-			}
-			logger.Debug().Str("service", "ocs").Msg("ignoring config file parsing when running supervised")
+
 			return nil
 		},
 		Action: func(c *cli.Context) error {

ocs/pkg/config/config.go

@@ -1,6 +1,12 @@
 package config
 
-import "context"
+import (
+	"context"
+	"fmt"
+	"reflect"
+
+	gofig "github.com/gookit/config/v2"
+)
 
 // Log defines the available logging configuration.
 type Log struct {
@@ -84,3 +90,93 @@ type Config struct {
 func New() *Config {
 	return &Config{}
 }
+
+// DefaultConfig provides default values for a config struct.
+func DefaultConfig() *Config {
+	return &Config{
+		Log: Log{},
+		Debug: Debug{
+			Addr:   "127.0.0.1:9114",
+			Token:  "",
+			Pprof:  false,
+			Zpages: false,
+		},
+		HTTP: HTTP{
+			Addr: "127.0.0.1:9110",
+			Root: "/ocs",
+			CORS: CORS{
+				AllowedOrigins:   []string{"*"},
+				AllowedMethods:   []string{"GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"},
+				AllowedHeaders:   []string{"Authorization", "Origin", "Content-Type", "Accept", "X-Requested-With"},
+				AllowCredentials: true,
+			},
+		},
+		Tracing: Tracing{
+			Enabled:   false,
+			Type:      "jaeger",
+			Endpoint:  "",
+			Collector: "",
+			Service:   "ocs",
+		},
+		TokenManager: TokenManager{
+			JWTSecret: "Pive-Fumkiu4",
+		},
+		Service: Service{
+			Name:      "ocs",
+			Namespace: "com.owncloud.web",
+		},
+		AccountBackend:     "accounts",
+		RevaAddress:        "127.0.0.1:9142",
+		StorageUsersDriver: "ocis",
+		MachineAuthAPIKey:  "change-me-please",
+		IdentityManagement: IdentityManagement{
+			Address: "https://localhost:9200",
+		},
+	}
+}
+
+// GetEnv fetches a list of known env variables for this extension. It is to be used by gookit, as it provides a list
+// with all the environment variables an extension supports.
+func GetEnv() []string {
+	var r = make([]string, len(structMappings(&Config{})))
+	for i := range structMappings(&Config{}) {
+		r = append(r, structMappings(&Config{})[i].EnvVars...)
+	}
+
+	return r
+}
+
+// UnmapEnv loads values from the gooconf.Config argument and sets them in the expected destination.
+func (c *Config) UnmapEnv(gooconf *gofig.Config) error {
+	vals := structMappings(c)
+	for i := range vals {
+		for j := range vals[i].EnvVars {
+			// we need to guard against v != "" because this is the condition that checks that the value is set from the environment.
+			// the `ok` guard is not enough, apparently.
+			if v, ok := gooconf.GetValue(vals[i].EnvVars[j]); ok && v != "" {
+
+				// get the destination type from destination
+				switch reflect.ValueOf(vals[i].Destination).Type().String() {
+				case "*bool":
+					r := gooconf.Bool(vals[i].EnvVars[j])
+					*vals[i].Destination.(*bool) = r
+				case "*string":
+					r := gooconf.String(vals[i].EnvVars[j])
+					*vals[i].Destination.(*string) = r
+				case "*int":
+					r := gooconf.Int(vals[i].EnvVars[j])
+					*vals[i].Destination.(*int) = r
+				case "*float64":
+					// defaults to float64
+					r := gooconf.Float(vals[i].EnvVars[j])
+					*vals[i].Destination.(*float64) = r
+				default:
+					// it is unlikely we will ever get here. Let this serve more as a runtime check for when debugging.
+					return fmt.Errorf("invalid type for env var: `%v`", vals[i].EnvVars[j])
+				}
+			}
+		}
+	}
+
+	return nil
+}

ocs/pkg/config/env.go

@@ -0,0 +1,108 @@
+package config
+
+type mapping struct {
+	EnvVars     []string    // name of the EnvVars var.
+	Destination interface{} // memory address of the original config value to modify.
+}
+
+// structMappings binds a set of environment variables to a destination on cfg.
+func structMappings(cfg *Config) []mapping {
+	return []mapping{
+		{
+			EnvVars:     []string{"OCS_LOG_FILE", "OCIS_LOG_FILE"},
+			Destination: &cfg.Log.File,
+		},
+		{
+			EnvVars:     []string{"OCS_LOG_LEVEL", "OCIS_LOG_LEVEL"},
+			Destination: &cfg.Log.Level,
+		},
+		{
+			EnvVars:     []string{"OCS_LOG_PRETTY", "OCIS_LOG_PRETTY"},
+			Destination: &cfg.Log.Pretty,
+		},
+		{
+			EnvVars:     []string{"OCS_LOG_COLOR", "OCIS_LOG_COLOR"},
+			Destination: &cfg.Log.Color,
+		},
+		{
+			EnvVars:     []string{"OCS_CONFIG_FILE"},
+			Destination: &cfg.File,
+		},
+		{
+			EnvVars:     []string{"OCS_TRACING_ENABLED", "OCIS_TRACING_ENABLED"},
+			Destination: &cfg.Tracing.Enabled,
+		},
+		{
+			EnvVars:     []string{"OCS_TRACING_TYPE", "OCIS_TRACING_TYPE"},
+			Destination: &cfg.Tracing.Type,
+		},
+		{
+			EnvVars:     []string{"OCS_TRACING_ENDPOINT", "OCIS_TRACING_ENDPOINT"},
+			Destination: &cfg.Tracing.Endpoint,
+		},
+		{
+			EnvVars:     []string{"OCS_TRACING_COLLECTOR", "OCIS_TRACING_COLLECTOR"},
+			Destination: &cfg.Tracing.Collector,
+		},
+		{
+			EnvVars:     []string{"OCS_TRACING_SERVICE"},
+			Destination: &cfg.Tracing.Service,
+		},
+		{
+			EnvVars:     []string{"OCS_DEBUG_ADDR"},
+			Destination: &cfg.Debug.Addr,
+		},
+		{
+			EnvVars:     []string{"OCS_DEBUG_TOKEN"},
+			Destination: &cfg.Debug.Token,
+		},
+		{
+			EnvVars:     []string{"OCS_DEBUG_PPROF"},
+			Destination: &cfg.Debug.Pprof,
+		},
+		{
+			EnvVars:     []string{"OCS_DEBUG_ZPAGES"},
+			Destination: &cfg.Debug.Zpages,
+		},
+		{
+			EnvVars:     []string{"OCS_HTTP_ADDR"},
+			Destination: &cfg.HTTP.Addr,
+		},
+		{
+			EnvVars:     []string{"OCS_NAMESPACE"},
+			Destination: &cfg.Service.Namespace,
+		},
+		{
+			EnvVars:     []string{"OCS_NAME"},
+			Destination: &cfg.Service.Name,
+		},
+		{
+			EnvVars:     []string{"OCS_HTTP_ROOT"},
+			Destination: &cfg.HTTP.Root,
+		},
+		{
+			EnvVars:     []string{"OCS_JWT_SECRET", "OCIS_JWT_SECRET"},
+			Destination: &cfg.TokenManager.JWTSecret,
+		},
+		{
+			EnvVars:     []string{"OCS_ACCOUNT_BACKEND_TYPE"},
+			Destination: &cfg.AccountBackend,
+		},
+		{
+			EnvVars:     []string{"REVA_GATEWAY"},
+			Destination: &cfg.RevaAddress,
+		},
+		{
+			EnvVars:     []string{"OCS_MACHINE_AUTH_API_KEY", "OCIS_MACHINE_AUTH_API_KEY"},
+			Destination: &cfg.MachineAuthAPIKey,
+		},
+		{
+			EnvVars:     []string{"OCS_IDM_ADDRESS", "OCIS_URL"},
+			Destination: &cfg.IdentityManagement.Address,
+		},
+		{
+			EnvVars:     []string{"OCS_STORAGE_USERS_DRIVER", "STORAGE_USERS_DRIVER"},
+			Destination: &cfg.StorageUsersDriver,
+		},
+	}
+}

ocs/pkg/flagset/flagset.go

@@ -19,204 +19,6 @@ func HealthWithConfig(cfg *config.Config) []cli.Flag {
 	}
 }
 
-// ServerWithConfig applies cfg to the root flagset
-func ServerWithConfig(cfg *config.Config) []cli.Flag {
-	return []cli.Flag{
-		&cli.StringFlag{
-			Name:        "log-file",
-			Usage:       "Enable log to file",
-			EnvVars:     []string{"OCS_LOG_FILE", "OCIS_LOG_FILE"},
-			Destination: &cfg.Log.File,
-		},
-		&cli.StringFlag{
-			Name:        "log-level",
-			Usage:       "Set logging level",
-			EnvVars:     []string{"OCS_LOG_LEVEL", "OCIS_LOG_LEVEL"},
-			Destination: &cfg.Log.Level,
-		},
-		&cli.BoolFlag{
-			Name:        "log-pretty",
-			Usage:       "Enable pretty logging",
-			EnvVars:     []string{"OCS_LOG_PRETTY", "OCIS_LOG_PRETTY"},
-			Destination: &cfg.Log.Pretty,
-		},
-		&cli.BoolFlag{
-			Name:        "log-color",
-			Usage:       "Enable colored logging",
-			EnvVars:     []string{"OCS_LOG_COLOR", "OCIS_LOG_COLOR"},
-			Destination: &cfg.Log.Color,
-		},
-		&cli.StringFlag{
-			Name:        "config-file",
-			Value:       "",
-			Usage:       "Path to config file",
-			EnvVars:     []string{"OCS_CONFIG_FILE"},
-			Destination: &cfg.File,
-		},
-		&cli.BoolFlag{
-			Name:        "tracing-enabled",
-			Value:       flags.OverrideDefaultBool(cfg.Tracing.Enabled, false),
-			Usage:       "Enable sending traces",
-			EnvVars:     []string{"OCS_TRACING_ENABLED", "OCIS_TRACING_ENABLED"},
-			Destination: &cfg.Tracing.Enabled,
-		},
-		&cli.StringFlag{
-			Name:        "tracing-type",
-			Value:       flags.OverrideDefaultString(cfg.Tracing.Type, "jaeger"),
-			Usage:       "Tracing backend type",
-			EnvVars:     []string{"OCS_TRACING_TYPE", "OCIS_TRACING_TYPE"},
-			Destination: &cfg.Tracing.Type,
-		},
-		&cli.StringFlag{
-			Name:        "tracing-endpoint",
-			Value:       flags.OverrideDefaultString(cfg.Tracing.Endpoint, ""),
-			Usage:       "Endpoint for the agent",
-			EnvVars:     []string{"OCS_TRACING_ENDPOINT", "OCIS_TRACING_ENDPOINT"},
-			Destination: &cfg.Tracing.Endpoint,
-		},
-		&cli.StringFlag{
-			Name:        "tracing-collector",
-			Value:       flags.OverrideDefaultString(cfg.Tracing.Collector, ""),
-			Usage:       "Endpoint for the collector",
-			EnvVars:     []string{"OCS_TRACING_COLLECTOR", "OCIS_TRACING_COLLECTOR"},
-			Destination: &cfg.Tracing.Collector,
-		},
-		&cli.StringFlag{
-			Name:        "tracing-service",
-			Value:       flags.OverrideDefaultString(cfg.Tracing.Service, "ocs"),
-			Usage:       "Service name for tracing",
-			EnvVars:     []string{"OCS_TRACING_SERVICE"},
-			Destination: &cfg.Tracing.Service,
-		},
-		&cli.StringFlag{
-			Name:        "debug-addr",
-			Value:       flags.OverrideDefaultString(cfg.Debug.Addr, "127.0.0.1:9114"),
-			Usage:       "Address to bind debug server",
-			EnvVars:     []string{"OCS_DEBUG_ADDR"},
-			Destination: &cfg.Debug.Addr,
-		},
-		&cli.StringFlag{
-			Name:        "debug-token",
-			Value:       flags.OverrideDefaultString(cfg.Debug.Token, ""),
-			Usage:       "Token to grant metrics access",
-			EnvVars:     []string{"OCS_DEBUG_TOKEN"},
-			Destination: &cfg.Debug.Token,
-		},
-		&cli.BoolFlag{
-			Name:        "debug-pprof",
-			Usage:       "Enable pprof debugging",
-			EnvVars:     []string{"OCS_DEBUG_PPROF"},
-			Destination: &cfg.Debug.Pprof,
-		},
-		&cli.BoolFlag{
-			Name:        "debug-zpages",
-			Usage:       "Enable zpages debugging",
-			EnvVars:     []string{"OCS_DEBUG_ZPAGES"},
-			Destination: &cfg.Debug.Zpages,
-		},
-		&cli.StringFlag{
-			Name:        "http-addr",
-			Value:       flags.OverrideDefaultString(cfg.HTTP.Addr, "127.0.0.1:9110"),
-			Usage:       "Address to bind http server",
-			EnvVars:     []string{"OCS_HTTP_ADDR"},
-			Destination: &cfg.HTTP.Addr,
-		},
-		&cli.StringFlag{
-			Name:        "http-namespace",
-			Value:       flags.OverrideDefaultString(cfg.Service.Namespace, "com.owncloud.web"),
-			Usage:       "Set the base namespace for the http namespace",
-			EnvVars:     []string{"OCS_NAMESPACE"},
-			Destination: &cfg.Service.Namespace,
-		},
-		&cli.StringSliceFlag{
-			Name:    "cors-allowed-origins",
-			Value:   cli.NewStringSlice("*"),
-			Usage:   "Set the allowed CORS origins",
-			EnvVars: []string{"OCS_CORS_ALLOW_ORIGINS", "OCIS_CORS_ALLOW_ORIGINS"},
-		},
-		&cli.StringSliceFlag{
-			Name:    "cors-allowed-methods",
-			Value:   cli.NewStringSlice("GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"),
-			Usage:   "Set the allowed CORS origins",
-			EnvVars: []string{"OCS_CORS_ALLOW_METHODS", "OCIS_CORS_ALLOW_METHODS"},
-		},
-		&cli.StringSliceFlag{
-			Name:    "cors-allowed-headers",
-			Value:   cli.NewStringSlice("Authorization", "Origin", "Content-Type", "Accept", "X-Requested-With"),
-			Usage:   "Set the allowed CORS origins",
-			EnvVars: []string{"OCS_CORS_ALLOW_HEADERS", "OCIS_CORS_ALLOW_HEADERS"},
-		},
-		&cli.BoolFlag{
-			Name:    "cors-allow-credentials",
-			Value:   flags.OverrideDefaultBool(cfg.HTTP.CORS.AllowCredentials, true),
-			Usage:   "Allow credentials for CORS",
-			EnvVars: []string{"OCS_CORS_ALLOW_CREDENTIALS", "OCIS_CORS_ALLOW_CREDENTIALS"},
-		},
-		&cli.StringFlag{
-			Name:        "name",
-			Value:       flags.OverrideDefaultString(cfg.Service.Name, "ocs"),
-			Usage:       "Service name",
-			EnvVars:     []string{"OCS_NAME"},
-			Destination: &cfg.Service.Name,
-		},
-		&cli.StringFlag{
-			Name:        "http-root",
-			Value:       flags.OverrideDefaultString(cfg.HTTP.Root, "/ocs"),
-			Usage:       "Root path of http server",
-			EnvVars:     []string{"OCS_HTTP_ROOT"},
-			Destination: &cfg.HTTP.Root,
-		},
-
-		&cli.StringFlag{
-			Name:        "jwt-secret",
-			Value:       flags.OverrideDefaultString(cfg.TokenManager.JWTSecret, "Pive-Fumkiu4"),
-			Usage:       "Used to dismantle the access token, should equal reva's jwt-secret",
-			EnvVars:     []string{"OCS_JWT_SECRET", "OCIS_JWT_SECRET"},
-			Destination: &cfg.TokenManager.JWTSecret,
-		},
-
-		&cli.StringFlag{
-			Name:        "account-backend-type",
-			Value:       flags.OverrideDefaultString(cfg.AccountBackend, "accounts"),
-			Usage:       "account-backend-type",
-			EnvVars:     []string{"OCS_ACCOUNT_BACKEND_TYPE"},
-			Destination: &cfg.AccountBackend,
-		},
-		&cli.StringFlag{
-			Name:        "reva-gateway-addr",
-			Value:       flags.OverrideDefaultString(cfg.RevaAddress, "127.0.0.1:9142"),
-			Usage:       "Address of REVA gateway endpoint",
-			EnvVars:     []string{"REVA_GATEWAY"},
-			Destination: &cfg.RevaAddress,
-		},
-		&cli.StringFlag{
-			Name:        "machine-auth-api-key",
-			Value:       flags.OverrideDefaultString(cfg.MachineAuthAPIKey, "change-me-please"),
-			Usage:       "the API key to be used for the machine auth driver in reva",
-			EnvVars:     []string{"OCS_MACHINE_AUTH_API_KEY", "OCIS_MACHINE_AUTH_API_KEY"},
-			Destination: &cfg.MachineAuthAPIKey,
-		},
-		&cli.StringFlag{
-			Name:        "idm-address",
-			Value:       flags.OverrideDefaultString(cfg.IdentityManagement.Address, "https://localhost:9200"),
-			EnvVars:     []string{"OCS_IDM_ADDRESS", "OCIS_URL"},
-			Usage:       "keeps track of the IDM Address. Needed because of Reva requisite of uniqueness for users",
-			Destination: &cfg.IdentityManagement.Address,
-		},
-		&cli.StringFlag{
-			Name:        "users-driver",
-			Value:       flags.OverrideDefaultString(cfg.StorageUsersDriver, "ocis"),
-			Usage:       "storage driver for users mount: eg. local, eos, owncloud, ocis or s3",
-			EnvVars:     []string{"OCS_STORAGE_USERS_DRIVER", "STORAGE_USERS_DRIVER"},
-			Destination: &cfg.StorageUsersDriver,
-		},
-		&cli.StringFlag{
-			Name:  "extensions",
-			Usage: "Run specific extensions during supervised mode",
-		},
-	}
-}
-
 // ListOcsWithConfig applies the config to the list commands flagset.
 func ListOcsWithConfig(cfg *config.Config) []cli.Flag {
 	return []cli.Flag{