machine-db/client/cli/racks.go

// Copyright 2017 The LUCI 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 cli

import (
	"github.com/maruel/subcommands"

	"go.chromium.org/luci/common/cli"
	"go.chromium.org/luci/common/errors"
	"go.chromium.org/luci/common/flag"

	"go.chromium.org/luci/machine-db/api/crimson/v1"
)

// printRacks prints rack data to stdout in tab-separated columns.
func printRacks(tsv bool, racks ...*crimson.Rack) {
	if len(racks) > 0 {
		p := newStdoutPrinter(tsv)
		defer p.Flush()
		if !tsv {
			p.Row("Name", "Datacenter", "Description", "State", "KVM")
		}
		for _, r := range racks {
			p.Row(r.Name, r.Datacenter, r.Description, r.State, r.Kvm)
		}
	}
}

// GetRacksCmd is the command to get racks.
type GetRacksCmd struct {
	commandBase
	req crimson.ListRacksRequest
}

// Run runs the command to get racks.
func (c *GetRacksCmd) Run(app subcommands.Application, args []string, env subcommands.Env) int {
	ctx := cli.GetContext(app, c, env)
	client := getClient(ctx)
	resp, err := client.ListRacks(ctx, &c.req)
	if err != nil {
		errors.Log(ctx, err)
		return 1
	}
	printRacks(c.f.tsv, resp.Racks...)
	return 0
}

// getRacksCmd returns a command to get racks.
func getRacksCmd(params *Parameters) *subcommands.Command {
	return &subcommands.Command{
		UsageLine: "get-racks [-name <name>]... [-dc <datacenter>]... [-kvm <kvm>]...",
		ShortDesc: "retrieves racks",
		LongDesc:  "Retrieves racks matching the given names and dcs, or all racks if names and dcs are omitted.\n\nExample to get all racks:\ncrimson get-racks\nExample to get racks in datacenter xx1:\ncrimson get-racks -dc xx1",
		CommandRun: func() subcommands.CommandRun {
			cmd := &GetRacksCmd{}
			cmd.Initialize(params)
			cmd.Flags.Var(flag.StringSlice(&cmd.req.Names), "name", "Name of a rack to filter by. Can be specified multiple times.")
			cmd.Flags.Var(flag.StringSlice(&cmd.req.Datacenters), "dc", "Name of a datacenter to filter by. Can be specified multiple times.")
			cmd.Flags.Var(flag.StringSlice(&cmd.req.Kvms), "kvm", "Name of a KVM to filter by. Can be specified multiple times.")
			return cmd
		},
	}
}