cipd: Implement 'init', 'install' and 'installed' subcommands.

go/src/infra/tools/cipd/local/manifest.go

Index: go/src/infra/tools/cipd/local/manifest.go
diff --git a/go/src/infra/tools/cipd/local/manifest.go b/go/src/infra/tools/cipd/local/manifest.go
index 8883549d3fc5f05c5606da0341b8f85fb17cc49c..c335af0ea8b899c0288d831d34108311ecfe72a0 100644
--- a/go/src/infra/tools/cipd/local/manifest.go
+++ b/go/src/infra/tools/cipd/local/manifest.go
@@ -11,14 +11,19 @@ import (
 	"io/ioutil"
 )
 
+// SiteServiceDir is a name of the directory inside an installation root
+// reserved for cipd stuff.
+const SiteServiceDir = ".cipd"
+
 const (
-	// Name of the directory inside an installation root reserved for cipd stuff.
-	siteServiceDir = ".cipd"
-	// Name of the directory inside the package reserved for cipd stuff.
+	// packageServiceDir is a name of the directory inside the package
+	// reserved for cipd stuff.
 	packageServiceDir = ".cipdpkg"
-	// Name of the manifest file inside the package.
+
+	// manifestName is a name of the manifest file inside the package.
 	manifestName = packageServiceDir + "/manifest.json"
-	// Format version to write to the manifest file.
+
+	// manifestFormatVersion is a version to write to the manifest file.
 	manifestFormatVersion = "1"
 )