87 lines
2.3 KiB
Go
87 lines
2.3 KiB
Go
// Copyright (c) 2024 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail 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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// Proton Mail 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 Proton Mail 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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"os"
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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 := os.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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return getExecutableInDirectory(name, directory)
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}
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func 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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