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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2018 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"
"sort"
"strings"
"github.com/jessevdk/go-flags"
"github.com/snapcore/snapd/i18n"
)
var shortSandboxFeaturesHelp = i18n.G("Print sandbox features available on the system")
var longSandboxFeaturesHelp = i18n.G(`
The sandbox command prints tags describing features of individual sandbox
components used by snapd on a given system.
`)
type cmdSandboxFeatures struct {
clientMixin
Required []string `long:"required" arg-name:"<backend feature>"`
}
func init() {
addDebugCommand("sandbox-features", shortSandboxFeaturesHelp, longSandboxFeaturesHelp, func() flags.Commander {
return &cmdSandboxFeatures{}
}, map[string]string{
"required": i18n.G("Ensure that given backend:feature is available"),
}, nil)
}
func (cmd cmdSandboxFeatures) Execute(args []string) error {
if len(args) > 0 {
return ErrExtraArgs
}
sysInfo, err := cmd.client.SysInfo()
if err != nil {
return err
}
sandboxFeatures := sysInfo.SandboxFeatures
if len(cmd.Required) > 0 {
avail := make(map[string]bool)
for backend := range sandboxFeatures {
for _, feature := range sandboxFeatures[backend] {
avail[fmt.Sprintf("%s:%s", backend, feature)] = true
}
}
for _, required := range cmd.Required {
if !avail[required] {
return fmt.Errorf("sandbox feature not available: %q", required)
}
}
} else {
backends := make([]string, 0, len(sandboxFeatures))
for backend := range sandboxFeatures {
backends = append(backends, backend)
}
sort.Strings(backends)
w := tabWriter()
defer w.Flush()
for _, backend := range backends {
fmt.Fprintf(w, "%s:\t%s\n", backend, strings.Join(sandboxFeatures[backend], " "))
}
}
return nil
}
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