/
cmd_set.go
106 lines (89 loc) · 2.9 KB
/
cmd_set.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016 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 (
"fmt"
"strings"
"github.com/jessevdk/go-flags"
"github.com/snapcore/snapd/i18n"
"github.com/snapcore/snapd/jsonutil"
)
var shortSetHelp = i18n.G("Change configuration options")
var longSetHelp = i18n.G(`
The set command changes the provided configuration options as requested.
$ snap set snap-name username=frank password=$PASSWORD
All configuration changes are persisted at once, and only after the
snap's configuration hook returns successfully.
Nested values may be modified via a dotted path:
$ snap set snap-name author.name=frank
Configuration option may be unset with exclamation mark:
$ snap set snap-name author!
`)
type cmdSet struct {
waitMixin
Positional struct {
Snap installedSnapName
ConfValues []string `required:"1"`
} `positional-args:"yes" required:"yes"`
}
func init() {
addCommand("set", shortSetHelp, longSetHelp, func() flags.Commander { return &cmdSet{} }, waitDescs, []argDesc{
{
name: "<snap>",
// TRANSLATORS: This should not start with a lowercase letter.
desc: i18n.G("The snap to configure (e.g. hello-world)"),
}, {
// TRANSLATORS: This needs to begin with < and end with >
name: i18n.G("<conf value>"),
// TRANSLATORS: This should not start with a lowercase letter.
desc: i18n.G("Set (key=value) or unset (key!) configuration value"),
},
})
}
func (x *cmdSet) Execute(args []string) error {
patchValues := make(map[string]interface{})
for _, patchValue := range x.Positional.ConfValues {
parts := strings.SplitN(patchValue, "=", 2)
if len(parts) == 1 && strings.HasSuffix(patchValue, "!") {
patchValues[strings.TrimSuffix(patchValue, "!")] = nil
continue
}
if len(parts) != 2 {
return fmt.Errorf(i18n.G("invalid configuration: %q (want key=value)"), patchValue)
}
var value interface{}
if err := jsonutil.DecodeWithNumber(strings.NewReader(parts[1]), &value); err != nil {
// Not valid JSON-- just save the string as-is.
patchValues[parts[0]] = parts[1]
} else {
patchValues[parts[0]] = value
}
}
snapName := string(x.Positional.Snap)
id, err := x.client.SetConf(snapName, patchValues)
if err != nil {
return err
}
if _, err := x.wait(id); err != nil {
if err == noWait {
return nil
}
return err
}
return nil
}