TOOLS-186 client-side index namespace check in mongorestore

Former-commit-id: 93fc3e00ea87719c25d67ba266027da27a633d63

1 files changed, 8 insertions, 0 deletions

diff --git a/mongorestore/metadata.go b/mongorestore/metadata.go
index e5c7f0f5f54..f038f146042 100644
--- a/mongorestore/metadata.go
+++ b/mongorestore/metadata.go
@@ -129,6 +129,14 @@ func (restore *MongoRestore) CreateIndexes(intent *intents.Intent, indexes []Ind
 		// update the namespace of the index before inserting
 		index.Options["ns"] = intent.Key()
 
+		// check for length violations before building the command
+		fullIndexName := fmt.Sprintf("%v.$%v", index.Options["ns"], index.Options["name"])
+		if len(fullIndexName) > 127 {
+			return fmt.Errorf(
+				"cannot restore index with namespace '%v': "+
+					"namespace is too long (max size is 127 characters)", fullIndexName)
+		}
+
 		// remove the index version, forcing an update,
 		// unless we specifically want to keep it
 		if !restore.OutputOptions.KeepIndexVersion {