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removal.go
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removal.go
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// Copyright (c) 2022 Proton AG
//
// This file is part of Proton Mail Bridge.
//
// Proton Mail Bridge is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Proton Mail Bridge 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
// Package files provides standard filesystem operations.
package files
import (
"os"
"path/filepath"
"sort"
"strings"
"github.com/hashicorp/go-multierror"
)
type OpRemove struct {
targets []string
exceptions []string
}
func Remove(targets ...string) *OpRemove {
return &OpRemove{targets: targets}
}
func (op *OpRemove) Except(exceptions ...string) *OpRemove {
op.exceptions = exceptions
return op
}
func (op *OpRemove) Do() error {
var multiErr error
for _, target := range op.targets {
if err := remove(target, op.exceptions...); err != nil {
multiErr = multierror.Append(multiErr, err)
}
}
return multiErr
}
func remove(dir string, except ...string) error {
var toRemove []string
if err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
for _, exception := range except {
if path == exception || strings.HasPrefix(exception, path) || strings.HasPrefix(path, exception) {
return nil
}
}
toRemove = append(toRemove, path)
return nil
}); err != nil {
return err
}
sort.Sort(sort.Reverse(sort.StringSlice(toRemove)))
for _, target := range toRemove {
if err := os.RemoveAll(target); err != nil {
return err
}
}
return nil
}