/
snap_local_repo.go
109 lines (89 loc) · 2.62 KB
/
snap_local_repo.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2014-2015 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 snappy
import (
"os"
"path/filepath"
"github.com/ubuntu-core/snappy/dirs"
)
const (
// SideloadedOrigin is the (forced) origin for sideloaded snaps
SideloadedOrigin = "sideload"
)
// SnapLocalRepository is the type for a local snap repository
type SnapLocalRepository struct {
path string
}
// NewLocalSnapRepository returns a new SnapLocalRepository for the given
// path
func NewLocalSnapRepository() *SnapLocalRepository {
path := dirs.SnapSnapsDir
if s, err := os.Stat(path); err != nil || !s.IsDir() {
return nil
}
return &SnapLocalRepository{path: path}
}
// Installed returns the installed snaps from this repository
func (s *SnapLocalRepository) Installed() (parts []Part, err error) {
globExpr := filepath.Join(s.path, "*", "*", "meta", "snap.yaml")
return s.partsForGlobExpr(globExpr)
}
// All the parts (ie all installed + removed-but-not-purged)
//
// TODO: that thing about removed
func (s *SnapLocalRepository) All() ([]Part, error) {
return s.Installed()
}
func (s *SnapLocalRepository) partsForGlobExpr(globExpr string) (parts []Part, err error) {
matches, err := filepath.Glob(globExpr)
if err != nil {
return nil, err
}
for _, yamlfile := range matches {
// skip "current" and similar symlinks
realpath, err := filepath.EvalSymlinks(yamlfile)
if err != nil {
return nil, err
}
if realpath != yamlfile {
continue
}
origin, _ := originFromYamlPath(realpath)
snap, err := NewInstalledSnapPart(realpath, origin)
if err != nil {
return nil, err
}
parts = append(parts, snap)
}
return parts, nil
}
func originFromBasedir(basedir string) (s string) {
ext := filepath.Ext(filepath.Dir(filepath.Clean(basedir)))
if len(ext) < 2 {
return ""
}
return ext[1:]
}
// originFromYamlPath *must* return "" if it's returning error.
func originFromYamlPath(path string) (string, error) {
origin := originFromBasedir(filepath.Join(path, "..", ".."))
if origin == "" {
return "", ErrInvalidPart
}
return origin, nil
}