mirror of
https://github.com/go-gitea/gitea
synced 2024-12-17 20:34:07 +01:00
88f835192d
Result of running `perl -p -i -e 's#interface\{\}#any#g' **/*` and `make fmt`.
Basically the same [as golang did](2580d0e08d
).
246 lines
5.5 KiB
Go
246 lines
5.5 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package rotatingfilewriter
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import (
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"bufio"
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"compress/gzip"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"time"
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"code.gitea.io/gitea/modules/graceful/releasereopen"
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"code.gitea.io/gitea/modules/util"
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)
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type Options struct {
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Rotate bool
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MaximumSize int64
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RotateDaily bool
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KeepDays int
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Compress bool
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CompressionLevel int
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}
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type RotatingFileWriter struct {
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mu sync.Mutex
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fd *os.File
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currentSize int64
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openDate int
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options Options
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cancelReleaseReopen func()
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}
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var ErrorPrintf func(format string, args ...any)
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// errorf tries to print error messages. Since this writer could be used by a logger system, this is the last chance to show the error in some cases
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func errorf(format string, args ...any) {
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if ErrorPrintf != nil {
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ErrorPrintf("rotatingfilewriter: "+format+"\n", args...)
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}
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}
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// Open creates a new rotating file writer.
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// Notice: if a file is opened by two rotators, there will be conflicts when rotating.
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// In the future, there should be "rotating file manager"
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func Open(filename string, options *Options) (*RotatingFileWriter, error) {
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if options == nil {
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options = &Options{}
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}
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rfw := &RotatingFileWriter{
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options: *options,
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}
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if err := rfw.open(filename); err != nil {
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return nil, err
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}
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rfw.cancelReleaseReopen = releasereopen.GetManager().Register(rfw)
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return rfw, nil
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}
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func (rfw *RotatingFileWriter) Write(b []byte) (int, error) {
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if rfw.options.Rotate && ((rfw.options.MaximumSize > 0 && rfw.currentSize >= rfw.options.MaximumSize) || (rfw.options.RotateDaily && time.Now().Day() != rfw.openDate)) {
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if err := rfw.DoRotate(); err != nil {
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// if this writer is used by a logger system, it's the logger system's responsibility to handle/show the error
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return 0, err
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}
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}
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n, err := rfw.fd.Write(b)
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if err == nil {
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rfw.currentSize += int64(n)
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}
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return n, err
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}
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func (rfw *RotatingFileWriter) Flush() error {
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return rfw.fd.Sync()
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}
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func (rfw *RotatingFileWriter) Close() error {
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rfw.mu.Lock()
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if rfw.cancelReleaseReopen != nil {
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rfw.cancelReleaseReopen()
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rfw.cancelReleaseReopen = nil
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}
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rfw.mu.Unlock()
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return rfw.fd.Close()
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}
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func (rfw *RotatingFileWriter) open(filename string) error {
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fd, err := os.OpenFile(filename, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0o660)
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if err != nil {
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return err
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}
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rfw.fd = fd
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finfo, err := fd.Stat()
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if err != nil {
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return err
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}
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rfw.currentSize = finfo.Size()
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rfw.openDate = finfo.ModTime().Day()
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return nil
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}
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func (rfw *RotatingFileWriter) ReleaseReopen() error {
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return errors.Join(
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rfw.fd.Close(),
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rfw.open(rfw.fd.Name()),
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)
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}
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// DoRotate the log file creating a backup like xx.2013-01-01.2
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func (rfw *RotatingFileWriter) DoRotate() error {
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if !rfw.options.Rotate {
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return nil
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}
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rfw.mu.Lock()
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defer rfw.mu.Unlock()
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prefix := fmt.Sprintf("%s.%s.", rfw.fd.Name(), time.Now().Format("2006-01-02"))
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var err error
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fname := ""
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for i := 1; err == nil && i <= 999; i++ {
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fname = prefix + fmt.Sprintf("%03d", i)
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_, err = os.Lstat(fname)
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if rfw.options.Compress && err != nil {
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_, err = os.Lstat(fname + ".gz")
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}
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}
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// return error if the last file checked still existed
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if err == nil {
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return fmt.Errorf("cannot find free file to rename %s", rfw.fd.Name())
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}
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fd := rfw.fd
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if err := fd.Close(); err != nil { // close file before rename
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return err
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}
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if err := util.Rename(fd.Name(), fname); err != nil {
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return err
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}
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if rfw.options.Compress {
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go func() {
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err := compressOldFile(fname, rfw.options.CompressionLevel)
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if err != nil {
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errorf("DoRotate: %v", err)
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}
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}()
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}
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if err := rfw.open(fd.Name()); err != nil {
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return err
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}
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go deleteOldFiles(
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filepath.Dir(fd.Name()),
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filepath.Base(fd.Name()),
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time.Now().AddDate(0, 0, -rfw.options.KeepDays),
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)
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return nil
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}
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func compressOldFile(fname string, compressionLevel int) error {
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reader, err := os.Open(fname)
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if err != nil {
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return fmt.Errorf("compressOldFile: failed to open existing file %s: %w", fname, err)
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}
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defer reader.Close()
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buffer := bufio.NewReader(reader)
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fnameGz := fname + ".gz"
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fw, err := os.OpenFile(fnameGz, os.O_WRONLY|os.O_CREATE, 0o660)
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if err != nil {
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return fmt.Errorf("compressOldFile: failed to open new file %s: %w", fnameGz, err)
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}
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defer fw.Close()
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zw, err := gzip.NewWriterLevel(fw, compressionLevel)
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if err != nil {
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return fmt.Errorf("compressOldFile: failed to create gzip writer: %w", err)
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}
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defer zw.Close()
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_, err = buffer.WriteTo(zw)
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if err != nil {
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_ = zw.Close()
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_ = fw.Close()
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_ = util.Remove(fname + ".gz")
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return fmt.Errorf("compressOldFile: failed to write to gz file: %w", err)
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}
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_ = reader.Close()
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err = util.Remove(fname)
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if err != nil {
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return fmt.Errorf("compressOldFile: failed to delete old file: %w", err)
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}
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return nil
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}
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func deleteOldFiles(dir, prefix string, removeBefore time.Time) {
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err := filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) (returnErr error) {
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defer func() {
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if r := recover(); r != nil {
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returnErr = fmt.Errorf("unable to delete old file '%s', error: %+v", path, r)
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}
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}()
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if err != nil {
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return err
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}
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if d.IsDir() {
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return nil
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}
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info, err := d.Info()
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if err != nil {
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return err
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}
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if info.ModTime().Before(removeBefore) {
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if strings.HasPrefix(filepath.Base(path), prefix) {
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return util.Remove(path)
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}
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}
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return nil
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})
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if err != nil {
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errorf("deleteOldFiles: failed to delete old file: %v", err)
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}
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}
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