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82 lines
2.2 KiB
82 lines
2.2 KiB
// Copyright (c) 2022 Proton Technologies AG |
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// |
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// This file is part of ProtonMail Bridge. |
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// |
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// ProtonMail Bridge is free software: you can redistribute it and/or modify |
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// it under the terms of the GNU General Public License as published by |
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// the Free Software Foundation, either version 3 of the License, or |
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// (at your option) any later version. |
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// |
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// ProtonMail Bridge is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// |
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// You should have received a copy of the GNU General Public License |
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>. |
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package versioner |
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import ( |
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"errors" |
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"io/ioutil" |
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"path/filepath" |
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"sort" |
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"github.com/Masterminds/semver/v3" |
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) |
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var ( |
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ErrNoVersions = errors.New("no available versions") |
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ErrNoExecutable = errors.New("no executable found") |
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ErrNoRemoveBase = errors.New("can't remove base version") |
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) |
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// Versioner manages a directory of versioned app directories. |
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type Versioner struct { |
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root string |
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} |
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func New(root string) *Versioner { |
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return &Versioner{root: root} |
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} |
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// ListVersions returns a collection of all available version numbers, sorted from newest to oldest. |
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func (v *Versioner) ListVersions() (Versions, error) { |
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dirs, err := ioutil.ReadDir(v.root) |
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if err != nil { |
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return nil, err |
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} |
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var versions Versions |
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for _, dir := range dirs { |
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version, err := semver.StrictNewVersion(dir.Name()) |
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if err != nil { |
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continue |
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} |
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// NOTE: If it's a bad directory, maybe delete it? |
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versions = append(versions, &Version{ |
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version: version, |
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path: filepath.Join(v.root, dir.Name()), |
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}) |
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} |
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sort.Sort(sort.Reverse(versions)) |
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return versions, nil |
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} |
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// GetExecutableInDirectory returns the full path to the executable in the given directory, if present. |
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// It returns an error if the executable is missing or does not have executable permissions set. |
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func (v *Versioner) GetExecutableInDirectory(name, directory string) (string, error) { |
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exe := filepath.Join(directory, getExeName(name)) |
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if !fileExists(exe) || !fileIsExecutable(exe) { |
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return "", ErrNoExecutable |
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} |
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return exe, nil |
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}
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