forked from snapcore/snapd
/
model.go
99 lines (85 loc) · 2.76 KB
/
model.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2019 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 client
import (
"bytes"
"encoding/json"
"fmt"
"net/url"
"github.com/snapcore/snapd/asserts"
)
type remodelData struct {
NewModel string `json:"new-model"`
}
// Remodel tries to remodel the system with the given assertion data
func (client *Client) Remodel(b []byte) (changeID string, err error) {
data, err := json.Marshal(&remodelData{
NewModel: string(b),
})
if err != nil {
return "", fmt.Errorf("cannot marshal remodel data: %v", err)
}
headers := map[string]string{
"Content-Type": "application/json",
}
return client.doAsync("POST", "/v2/model", nil, headers, bytes.NewReader(data))
}
// CurrentModelAssertion returns the current model assertion
func (client *Client) CurrentModelAssertion() (*asserts.Model, error) {
assert, err := currentAssertion(client, "/v2/model")
if err != nil {
return nil, err
}
modelAssert, ok := assert.(*asserts.Model)
if !ok {
return nil, fmt.Errorf("unexpected assertion type (%s) returned", assert.Type().Name)
}
return modelAssert, nil
}
// CurrentSerialAssertion returns the current serial assertion
func (client *Client) CurrentSerialAssertion() (*asserts.Serial, error) {
assert, err := currentAssertion(client, "/v2/model/serial")
if err != nil {
return nil, err
}
serialAssert, ok := assert.(*asserts.Serial)
if !ok {
return nil, fmt.Errorf("unexpected assertion type (%s) returned", assert.Type().Name)
}
return serialAssert, nil
}
// helper function for getting assertions from the daemon via a REST path
func currentAssertion(client *Client, path string) (asserts.Assertion, error) {
q := url.Values{}
response, err := client.raw("GET", path, q, nil, nil)
if err != nil {
return nil, fmt.Errorf("failed to query current assertion: %v", err)
}
defer response.Body.Close()
if response.StatusCode != 200 {
return nil, parseError(response)
}
dec := asserts.NewDecoder(response.Body)
// only decode a single assertion - we can't ever get more than a single
// assertion through these endpoints by design
assert, err := dec.Decode()
if err != nil {
return nil, fmt.Errorf("failed to decode assertions: %v", err)
}
return assert, nil
}