Merge pull request vitessio#7346 from tinyspeck/am_vtctld_getschema

[vtctld] Migrate GetSchema

go/cmd/vtctldclient/internal/command/schema.go

@@ -0,0 +1,99 @@
+/*
+Copyright 2021 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 command
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	"vitess.io/vitess/go/cmd/vtctldclient/cli"
+	"vitess.io/vitess/go/vt/topo/topoproto"
+
+	vtctldatapb "vitess.io/vitess/go/vt/proto/vtctldata"
+)
+
+// GetSchema makes a GetSchema gRPC call to a vtctld.
+var GetSchema = &cobra.Command{
+	Use:  "GetSchema [--tables TABLES ...] [--exclude-tables EXCLUDE_TABLES ...] [{--table-names-only | --table-sizes-only}] [--include-views] alias",
+	Args: cobra.ExactArgs(1),
+	RunE: commandGetSchema,
+}
+
+var getSchemaOptions = struct {
+	Tables         []string
+	ExcludeTables  []string
+	IncludeViews   bool
+	TableNamesOnly bool
+	TableSizesOnly bool
+}{}
+
+func commandGetSchema(cmd *cobra.Command, args []string) error {
+	if getSchemaOptions.TableNamesOnly && getSchemaOptions.TableSizesOnly {
+		return errors.New("can only pass one of --table-names-only and --table-sizes-only")
+	}
+
+	alias, err := topoproto.ParseTabletAlias(cmd.Flags().Arg(0))
+	if err != nil {
+		return err
+	}
+
+	resp, err := client.GetSchema(commandCtx, &vtctldatapb.GetSchemaRequest{
+		TabletAlias:    alias,
+		Tables:         getSchemaOptions.Tables,
+		ExcludeTables:  getSchemaOptions.ExcludeTables,
+		IncludeViews:   getSchemaOptions.IncludeViews,
+		TableNamesOnly: getSchemaOptions.TableNamesOnly,
+		TableSizesOnly: getSchemaOptions.TableSizesOnly,
+	})
+	if err != nil {
+		return err
+	}
+
+	if getSchemaOptions.TableNamesOnly {
+		names := make([]string, len(resp.Schema.TableDefinitions))
+
+		for i, td := range resp.Schema.TableDefinitions {
+			names[i] = td.Name
+		}
+
+		fmt.Printf("%s\n", strings.Join(names, "\n"))
+
+		return nil
+	}
+
+	data, err := cli.MarshalJSON(resp.Schema)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("%s\n", data)
+
+	return nil
+}
+
+func init() {
+	GetSchema.Flags().StringSliceVar(&getSchemaOptions.Tables, "tables", nil, "TODO")
+	GetSchema.Flags().StringSliceVar(&getSchemaOptions.ExcludeTables, "exclude-tables", nil, "TODO")
+	GetSchema.Flags().BoolVar(&getSchemaOptions.IncludeViews, "include-views", false, "TODO")
+	GetSchema.Flags().BoolVarP(&getSchemaOptions.TableNamesOnly, "table-names-only", "n", false, "TODO")
+	GetSchema.Flags().BoolVarP(&getSchemaOptions.TableSizesOnly, "table-sizes-only", "s", false, "TODO")
+
+	Root.AddCommand(GetSchema)
+}