Add reference command

Signed-off-by: Rohit Nayak <[email protected]>

go/cmd/reference.go

@@ -0,0 +1,51 @@
+/*
+Copyright 2024 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/vitessio/vt/go/reference"
+)
+
+func referenceCmd() *cobra.Command {
+	var inputType string
+
+	cmd := &cobra.Command{
+		Use:     "reference ",
+		Short:   "Suggests potential reference tables based on query logs and database schema",
+		Example: "vt reference file.test <mysql-connection-string>",
+		Args:    cobra.ExactArgs(2),
+		RunE: func(_ *cobra.Command, args []string) error {
+			cfg := reference.Config{
+				FileName:         args[0],
+				ConnectionString: args[1],
+			}
+
+			loader, err := configureLoader(inputType, false)
+			if err != nil {
+				return err
+			}
+			cfg.Loader = loader
+
+			return reference.Run(cfg)
+		},
+	}
+
+	addInputTypeFlag(cmd, &inputType)
+
+	return cmd
+}

go/cmd/root.go

@@ -37,6 +37,7 @@ func Execute() {
 	root.AddCommand(testerCmd())
 	root.AddCommand(tracerCmd())
 	root.AddCommand(keysCmd())
+	root.AddCommand(referenceCmd())
 
 	err := root.Execute()
 	if err != nil {

go/reference/reference.go

@@ -0,0 +1,41 @@
+/*
+Copyright 2024 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package reference
+
+import (
+	"github.com/vitessio/vt/go/data"
+	"io"
+	"os"
+)
+
+type Config struct {
+	FileName         string
+	ConnectionString string
+
+	Loader data.Loader
+}
+
+func Run(cfg Config) error {
+	return run(os.Stdout, cfg)
+}
+
+func run(out io.Writer, cfg Config) error {
+	if _, err := out.Write([]byte("Placeholder for reference output\n")); err != nil {
+		return err
+	}
+	return nil
+}