forked from Silverfish/proton-bridge
f3c69faf8b
* Renaming GUI, CLI, no-impact config. * License header and documentation rebranding. * Rename app title and vendor. Impact: manual install * Migrating mac keychain and launch on startup. * Fix linter and linter renaming
76 lines
1.5 KiB
Go
76 lines
1.5 KiB
Go
// Copyright (c) 2022 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 logging
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import "io"
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type Rotator struct {
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getFile FileProvider
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wc io.WriteCloser
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size int
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maxSize int
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}
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type FileProvider func() (io.WriteCloser, error)
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func NewRotator(maxSize int, getFile FileProvider) (*Rotator, error) {
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r := &Rotator{
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getFile: getFile,
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maxSize: maxSize,
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}
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if err := r.rotate(); err != nil {
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return nil, err
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}
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return r, nil
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}
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func (r *Rotator) Write(p []byte) (int, error) {
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if r.size+len(p) > r.maxSize {
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if err := r.rotate(); err != nil {
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return 0, err
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}
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}
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n, err := r.wc.Write(p)
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if err != nil {
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return n, err
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}
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r.size += n
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return n, nil
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}
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func (r *Rotator) rotate() error {
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if r.wc != nil {
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_ = r.wc.Close()
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}
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wc, err := r.getFile()
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if err != nil {
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return err
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}
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r.wc = wc
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r.size = 0
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return nil
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}
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