LogDog: Enable Coordinator to load project configs

appengine/logdog/coordinator/config/projects.go

Index: appengine/logdog/coordinator/config/projects.go
diff --git a/appengine/logdog/coordinator/config/projects.go b/appengine/logdog/coordinator/config/projects.go
index 67e1f66570b8128ecf6039db677d1a78a5bb5df4..a039f31da2e5708776f89efcbe302200dd0586bc 100644
--- a/appengine/logdog/coordinator/config/projects.go
+++ b/appengine/logdog/coordinator/config/projects.go
@@ -14,6 +14,7 @@ import (
 	log "github.com/luci/luci-go/common/logging"
 	"github.com/luci/luci-go/common/parallel"
 	configProto "github.com/luci/luci-go/common/proto/config"
+	"github.com/luci/luci-go/common/proto/logdog/svcconfig"
 	"github.com/luci/luci-go/server/auth"
 	"github.com/luci/luci-go/server/auth/identity"
 	"golang.org/x/net/context"
@@ -24,6 +25,36 @@ const maxProjectWorkers = 32
 // ErrNoAccess is returned if the user has no access to the requested project.
 var ErrNoAccess = errors.New("no access")
 
+// ProjectConfigPath returns the config set and path for project-specific
+// configuration.
+func ProjectConfigPath(project config.ProjectName) (string, string) {
+	return fmt.Sprintf("projects/%s", project), svcconfig.ProjectConfigFilename
+}
+
+// ProjectConfig loads the the project config protobuf from the config service.

[nodir, 2016/05/18 16:05:35]

the the

[dnj (Google), 2016/05/18 16:46:06]

Done.

+//
+// If the configuration was not present, config.ErrNoConfig will be returned.
+func ProjectConfig(c context.Context, project config.ProjectName) (*svcconfig.ProjectConfig, error) {
+	configSet, configPath := ProjectConfigPath(project)
+	cfg, err := config.Get(c).GetConfig(configSet, configPath, false)
+	if err != nil {
+		return nil, err
+	}
+
+	var pcfg svcconfig.ProjectConfig
+	if err := proto.UnmarshalText(cfg.Content, &pcfg); err != nil {
+		log.Fields{
+			log.ErrorKey:  err,
+			"contentHash": cfg.ContentHash,
+			"path":        cfg.Path,
+			"configSet":   cfg.ConfigSet,

[nodir, 2016/05/18 16:05:35]

somewhat sort keys?

[dnj (Google), 2016/05/18 16:46:06]

I'll put them in a logically-useful order, so in this case more specialized as
it goes down.

+		}.Errorf(c, "Failed to unmarshal project configuration.")
+		return nil, ErrInvalidConfig
+	}
+
+	return &pcfg, nil
+}
+
 // Projects lists the registered LogDog projects.
 func Projects(c context.Context) ([]string, error) {
 	projects, err := config.Get(c).GetProjects()