gopkg.in/ubuntu-core/snappy.v0@v0.0.0-20210902073436-25a8614f10a6/overlord/hookstate/ctlcmd/services.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2018 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package ctlcmd
    21  
    22  import (
    23  	"fmt"
    24  	"sort"
    25  	"text/tabwriter"
    26  
    27  	"github.com/snapcore/snapd/client/clientutil"
    28  	"github.com/snapcore/snapd/i18n"
    29  	"github.com/snapcore/snapd/overlord/servicestate"
    30  	"github.com/snapcore/snapd/progress"
    31  	"github.com/snapcore/snapd/snap"
    32  )
    33  
    34  var (
    35  	shortServicesHelp = i18n.G("Query the status of services")
    36  	longServicesHelp  = i18n.G(`
    37  The services command lists information about the services specified.
    38  `)
    39  )
    40  
    41  func init() {
    42  	addCommand("services", shortServicesHelp, longServicesHelp, func() command { return &servicesCommand{} })
    43  }
    44  
    45  type servicesCommand struct {
    46  	baseCommand
    47  	Positional struct {
    48  		ServiceNames []string `positional-arg-name:"<service>"`
    49  	} `positional-args:"yes"`
    50  }
    51  
    52  type byApp []*snap.AppInfo
    53  
    54  func (a byApp) Len() int      { return len(a) }
    55  func (a byApp) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
    56  func (a byApp) Less(i, j int) bool {
    57  	return a[i].Name < a[j].Name
    58  }
    59  
    60  func (c *servicesCommand) Execute([]string) error {
    61  	context, err := c.ensureContext()
    62  	if err != nil {
    63  		return err
    64  	}
    65  
    66  	st := context.State()
    67  	svcInfos, err := getServiceInfos(st, context.InstanceName(), c.Positional.ServiceNames)
    68  	if err != nil {
    69  		return err
    70  	}
    71  	sort.Sort(byApp(svcInfos))
    72  
    73  	sd := servicestate.NewStatusDecorator(progress.Null)
    74  
    75  	services, err := clientutil.ClientAppInfosFromSnapAppInfos(svcInfos, sd)
    76  	if err != nil || len(services) == 0 {
    77  		return err
    78  	}
    79  
    80  	w := tabwriter.NewWriter(c.stdout, 5, 3, 2, ' ', 0)
    81  	defer w.Flush()
    82  
    83  	fmt.Fprintln(w, i18n.G("Service\tStartup\tCurrent\tNotes"))
    84  
    85  	for _, svc := range services {
    86  		startup := i18n.G("disabled")
    87  		if svc.Enabled {
    88  			startup = i18n.G("enabled")
    89  		}
    90  		current := i18n.G("inactive")
    91  		if svc.DaemonScope == snap.UserDaemon {
    92  			current = "-"
    93  		} else if svc.Active {
    94  			current = i18n.G("active")
    95  		}
    96  		fmt.Fprintf(w, "%s.%s\t%s\t%s\t%s\n", svc.Snap, svc.Name, startup, current, clientutil.ClientAppInfoNotes(&svc))
    97  	}
    98  
    99  	return nil
   100  }