allow providing list of services not to start

Signed-off-by: jkoberg <jkoberg@owncloud.com>

changelog/unreleased/exclude-services-option.md

@@ -0,0 +1,7 @@
+Enhancement: Allow providing list of services NOT to start
+
+Until now if one wanted to use a custom version of a service, one
+needed to provide `OCIS_RUN_SERVICES` which is a list of all services to start.
+Now one can provide `OCIS_EXCLUDE_RUN_SERVICES` which is a list of only services not to start
+
+https://github.com/owncloud/ocis/pull/4254

ocis-pkg/config/config.go

@@ -49,7 +49,8 @@ type Mode int
 type Runtime struct {
 	Port       string `yaml:"port" env:"OCIS_RUNTIME_PORT"`
 	Host       string `yaml:"host" env:"OCIS_RUNTIME_HOST"`
-	Extensions string `yaml:"services" env:"OCIS_RUN_EXTENSIONS;OCIS_RUN_SERVICES"`
+	Extensions string `yaml:"services" env:"OCIS_RUN_EXTENSIONS;OCIS_RUN_SERVICES" desc:"Expects a space seperated list of service names. Will start only the listed services."`
+	Disabled   string `yaml:"disabled_services" env:"OCIS_EXCLUDE_RUN_SERVICES" desc:"Expects a space seperated list of service names. Will start all services except of the ones listed. Has no effect when OCIS_RUN_SERVICES is set."`
 }
 
 // Config combines all available configuration parts.

ocis/pkg/runtime/service/service.go

@@ -248,12 +248,24 @@ func (s *Service) generateRunSet(cfg *ociscfg.Config) {
 		return
 	}
 
+	disabled := make(map[string]bool)
+	if cfg.Runtime.Disabled != "" {
+		e := strings.Split(strings.ReplaceAll(cfg.Runtime.Disabled, " ", ""), ",")
+		for _, s := range e {
+			disabled[s] = true
+		}
+	}
+
 	for name := range s.ServicesRegistry {
-		runset = append(runset, name)
+		if !disabled[name] {
+			runset = append(runset, name)
+		}
 	}
 
 	for name := range s.Delayed {
-		runset = append(runset, name)
+		if !disabled[name] {
+			runset = append(runset, name)
+		}
 	}
 }