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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2020 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package main
import (
"bytes"
"encoding/json"
"fmt"
"time"
"github.com/jessevdk/go-flags"
"github.com/snapcore/snapd/interfaces"
)
type cmdSeeding struct {
clientMixin
unicodeMixin
}
func init() {
addDebugCommand("seeding",
"Obtain seeding and preseeding details",
"Obtain seeding and preseeding details",
func() flags.Commander {
return &cmdSeeding{}
}, nil, nil)
}
func (x *cmdSeeding) Execute(args []string) error {
esc := x.getEscapes()
if len(args) > 0 {
return ErrExtraArgs
}
var resp struct {
Seeded bool `json:"seeded,omitempty"`
Preseeded bool `json:"preseeded,omitempty"`
PreseedStartTime *time.Time `json:"preseed-start-time,omitempty"`
PreseedTime *time.Time `json:"preseed-time,omitempty"`
SeedStartTime *time.Time `json:"seed-start-time,omitempty"`
SeedRestartTime *time.Time `json:"seed-restart-time,omitempty"`
SeedTime *time.Time `json:"seed-time,omitempty"`
// use json.RawMessage to delay unmarshal'ing to the interfaces pkg
PreseedSystemKey *json.RawMessage `json:"preseed-system-key,omitempty"`
SeedRestartSystemKey *json.RawMessage `json:"seed-restart-system-key,omitempty"`
SeedError string `json:"seed-error,omitempty"`
}
if err := x.client.DebugGet("seeding", &resp, nil); err != nil {
return err
}
w := tabWriter()
// show seeded and preseeded keys
fmt.Fprintf(w, "seeded:\t%v\n", resp.Seeded)
if resp.SeedError != "" {
// print seed-error
termWidth, _ := termSize()
termWidth -= 3
if termWidth > 100 {
// any wider than this and it gets hard to read
termWidth = 100
}
fmt.Fprintln(w, "seed-error: |")
// XXX: reuse/abuse
printDescr(w, resp.SeedError, termWidth)
}
fmt.Fprintf(w, "preseeded:\t%v\n", resp.Preseeded)
// calculate the time spent preseeding (if preseeded) and seeding
// for the preseeded case, we use the seed-restart-time as the start time
// to show how long we spent only after booting the preseeded image
// if we are missing time values, we will default to showing "-" for the
// duration
seedDuration := esc.dash
if resp.Preseeded {
if resp.PreseedTime != nil && resp.PreseedStartTime != nil {
preseedDuration := resp.PreseedTime.Sub(*resp.PreseedStartTime).Round(time.Millisecond)
fmt.Fprintf(w, "image-preseeding:\t%v\n", preseedDuration)
} else {
fmt.Fprintf(w, "image-preseeding:\t%s\n", esc.dash)
}
if resp.SeedTime != nil && resp.SeedRestartTime != nil {
seedDuration = fmt.Sprintf("%v", resp.SeedTime.Sub(*resp.SeedRestartTime).Round(time.Millisecond))
}
} else if resp.SeedTime != nil && resp.SeedStartTime != nil {
seedDuration = fmt.Sprintf("%v", resp.SeedTime.Sub(*resp.SeedStartTime).Round(time.Millisecond))
}
fmt.Fprintf(w, "seed-completion:\t%s\n", seedDuration)
// we flush the tabwriter now because if we have more output, it will be
// the system keys, which are JSON and thus will never display cleanly in
// line with the other keys we did above
w.Flush()
// only compare system-keys if preseeded and the system-keys exist
// they might not exist if this command is used on a system that was
// preseeded with an older version of snapd, i.e. while this feature is
// being rolled out, we may be preseeding images via old snapd deb, but with
// new snapd snap
if resp.Preseeded && resp.SeedRestartSystemKey != nil && resp.PreseedSystemKey != nil {
// only show them if they don't match, so first unmarshal them so we can
// properly compare them
// we use raw json messages here so that the interfaces pkg can do the
// real unmarshalling to a real systemKey any that can be compared with
// SystemKeysMatch, if we had instead unmarshalled here, we would have
// to remarshal the map[string]any we got above and then pass those
// bytes back to the interfaces pkg which is awkward
seedSk, err := interfaces.UnmarshalJSONSystemKey(bytes.NewReader(*resp.SeedRestartSystemKey))
if err != nil {
return err
}
preseedSk, err := interfaces.UnmarshalJSONSystemKey(bytes.NewReader(*resp.PreseedSystemKey))
if err != nil {
return err
}
match, err := interfaces.SystemKeysMatch(preseedSk, seedSk)
if err != nil {
return err
}
if !match {
// mismatch, display the different keys
var preseedSkJSON, seedRestartSkJSON bytes.Buffer
json.Indent(&preseedSkJSON, *resp.PreseedSystemKey, "", " ")
fmt.Fprintf(Stdout, "preseed-system-key: ")
preseedSkJSON.WriteTo(Stdout)
fmt.Fprintln(Stdout, "")
json.Indent(&seedRestartSkJSON, *resp.SeedRestartSystemKey, "", " ")
fmt.Fprintf(Stdout, "seed-restart-system-key: ")
seedRestartSkJSON.WriteTo(Stdout)
fmt.Fprintln(Stdout, "")
}
}
return nil
}
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