LogDog: enable services to fetch project configs

appengine/logdog/coordinator/project.go

Index: appengine/logdog/coordinator/project.go
diff --git a/appengine/logdog/coordinator/project.go b/appengine/logdog/coordinator/project.go
index eefe3ca00f5b69658bab857c2ad1c57d2d513840..0553620a5bfe27caa9a059bcde0c247b9fd94e46 100644
--- a/appengine/logdog/coordinator/project.go
+++ b/appengine/logdog/coordinator/project.go
@@ -8,7 +8,9 @@ import (
 	"strings"
 
 	"github.com/luci/gae/service/datastore/meta"
+	"github.com/luci/gae/service/info"
 	"github.com/luci/luci-go/common/config"
+	"github.com/luci/luci-go/common/proto/logdog/svcconfig"
 	"golang.org/x/net/context"
 )
 
@@ -34,6 +36,27 @@ func ProjectFromNamespace(ns string) config.ProjectName {
 	return config.ProjectName(ns[len(projectNamespacePrefix):])
 }
 
+// CurrentProject returns the current project based on the currently-loaded
+// namespace.
+//
+// If there is no current namespace, or if the current namespace is not a valid
+// project namespace, an empty string will be returned.
+func CurrentProject(c context.Context) config.ProjectName {
+	if ns, ok := info.Get(c).GetNamespace(); ok {
+		return ProjectFromNamespace(ns)
+	}
+	return ""
+}
+
+// CurrentProjectConfig returns the project-specific configuration for the
+// current project.
+//
+// If there is no current project namespace, or if the current project has no
+// configuration, config.ErrInvalidConfig will be returned.
+func CurrentProjectConfig(c context.Context) (*svcconfig.ProjectConfig, error) {
+	return GetServices(c).ProjectConfig(c, CurrentProject(c))
+}
+
 // AllProjectsWithNamespaces scans current namespaces and returns those that
 // belong to LUCI projects.
 func AllProjectsWithNamespaces(c context.Context) ([]config.ProjectName, error) {