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提交 2b72d9f1 作者: Brian Tiger Chow
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deps(logging) vendor lumberjack (MIT) 

log rotation

License: MIT
Signed-off-by: 's avatarBrian Tiger Chow <brian@perfmode.com>
上级 d55dd16b
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Godeps/Godeps.json
......@@ -147,6 +147,11 @@
{
"ImportPath": "github.com/tuxychandru/pubsub",
"Rev": "02de8aa2db3d570c5ab1be5ba67b456fd0fb7c4e"
},
{
"ImportPath": "gopkg.in/natefinch/lumberjack.v2",
"Comment": "v1.0-12-gd28785c",
"Rev": "d28785c2f27cd682d872df46ccd8232843629f54"
}
]
}
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/.gitignore 0 → 100644
# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/LICENSE 0 → 100644
The MIT License (MIT)
Copyright (c) 2014 Nate Finch
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
\ No newline at end of file
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/README.md 0 → 100644
# lumberjack [![GoDoc](https://godoc.org/gopkg.in/natefinch/lumberjack.v2?status.png)](https://godoc.org/gopkg.in/natefinch/lumberjack.v2) [![Build Status](https://drone.io/github.com/natefinch/lumberjack/status.png)](https://drone.io/github.com/natefinch/lumberjack/latest) [![Build status](https://ci.appveyor.com/api/projects/status/00gchpxtg4gkrt5d)](https://ci.appveyor.com/project/natefinch/lumberjack)
### Lumberjack is a Go package for writing logs to rolling files.
Package lumberjack provides a rolling logger.
Note that this is v2.0 of lumberjack, and should be imported using gopkg.in
thusly:
import "gopkg.in/natefinch/lumberjack.v2"
The package name remains simply lumberjack, and the code resides at
https://github.com/natefinch/lumberjack under the v2.0 branch.
Lumberjack is intended to be one part of a logging infrastructure.
It is not an all-in-one solution, but instead is a pluggable
component at the bottom of the logging stack that simply controls the files
to which logs are written.
Lumberjack plays well with any logging package that can write to an
io.Writer, including the standard library's log package.
Lumberjack assumes that only one process is writing to the output files.
Using the same lumberjack configuration from multiple processes on the same
machine will result in improper behavior.
**Example**
To use lumberjack with the standard library's log package, just pass it into the SetOutput function when your application starts.
Code:
```go
log.SetOutput(&lumberjack.Logger{
Filename: "/var/log/myapp/foo.log",
MaxSize: 500, // megabytes
MaxBackups: 3,
MaxAge: 28, //days
})
```
## type Logger
``` go
type Logger struct {
// Filename is the file to write logs to. Backup log files will be retained
// in the same directory. It uses <processname>-lumberjack.log in
// os.TempDir() if empty.
Filename string `json:"filename" yaml:"filename"`
// MaxSize is the maximum size in megabytes of the log file before it gets
// rotated. It defaults to 100 megabytes.
MaxSize int `json:"maxsize" yaml:"maxsize"`
// MaxAge is the maximum number of days to retain old log files based on the
// timestamp encoded in their filename. Note that a day is defined as 24
// hours and may not exactly correspond to calendar days due to daylight
// savings, leap seconds, etc. The default is not to remove old log files
// based on age.
MaxAge int `json:"maxage" yaml:"maxage"`
// MaxBackups is the maximum number of old log files to retain. The default
// is to retain all old log files (though MaxAge may still cause them to get
// deleted.)
MaxBackups int `json:"maxbackups" yaml:"maxbackups"`
// LocalTime determines if the time used for formatting the timestamps in
// backup files is the computer's local time. The default is to use UTC
// time.
LocalTime bool `json:"localtime" yaml:"localtime"`
// contains filtered or unexported fields
}
```
Logger is an io.WriteCloser that writes to the specified filename.
Logger opens or creates the logfile on first Write. If the file exists and
is less than MaxSize megabytes, lumberjack will open and append to that file.
If the file exists and its size is >= MaxSize megabytes, the file is renamed
by putting the current time in a timestamp in the name immediately before the
file's extension (or the end of the filename if there's no extension). A new
log file is then created using original filename.
Whenever a write would cause the current log file exceed MaxSize megabytes,
the current file is closed, renamed, and a new log file created with the
original name. Thus, the filename you give Logger is always the "current" log
file.
### Cleaning Up Old Log Files
Whenever a new logfile gets created, old log files may be deleted. The most
recent files according to the encoded timestamp will be retained, up to a
number equal to MaxBackups (or all of them if MaxBackups is 0). Any files
with an encoded timestamp older than MaxAge days are deleted, regardless of
MaxBackups. Note that the time encoded in the timestamp is the rotation
time, which may differ from the last time that file was written to.
If MaxBackups and MaxAge are both 0, no old log files will be deleted.
### func (\*Logger) Close
``` go
func (l *Logger) Close() error
```
Close implements io.Closer, and closes the current logfile.
### func (\*Logger) Rotate
``` go
func (l *Logger) Rotate() error
```
Rotate causes Logger to close the existing log file and immediately create a
new one. This is a helper function for applications that want to initiate
rotations outside of the normal rotation rules, such as in response to
SIGHUP. After rotating, this initiates a cleanup of old log files according
to the normal rules.
**Example**
Example of how to rotate in response to SIGHUP.
Code:
```go
l := &lumberjack.Logger{}
log.SetOutput(l)
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGHUP)
go func() {
for {
<-c
l.Rotate()
}
}()
```
### func (\*Logger) Write
``` go
func (l *Logger) Write(p []byte) (n int, err error)
```
Write implements io.Writer. If a write would cause the log file to be larger
than MaxSize, the file is closed, renamed to include a timestamp of the
current time, and a new log file is created using the original log file name.
If the length of the write is greater than MaxSize, an error is returned.
- - -
Generated by [godoc2md](http://godoc.org/github.com/davecheney/godoc2md)
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/chown.go 0 → 100644
// +build !linux
package lumberjack
import (
"os"
)
func chown(_ string, _ os.FileInfo) error {
return nil
}
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/chown_linux.go 0 → 100644
package lumberjack
import (
"os"
"syscall"
)
// os_Chown is a var so we can mock it out during tests.
var os_Chown = os.Chown
func chown(name string, info os.FileInfo) error {
f, err := os.OpenFile(name, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, info.Mode())
if err != nil {
return err
}
f.Close()
stat := info.Sys().(*syscall.Stat_t)
return os_Chown(name, int(stat.Uid), int(stat.Gid))
}
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/example_test.go 0 → 100644
package lumberjack_test
import (
"log"
"github.com/natefinch/lumberjack"
)
// To use lumberjack with the standard library's log package, just pass it into
// the SetOutput function when your application starts.
func Example() {
log.SetOutput(&lumberjack.Logger{
Filename: "/var/log/myapp/foo.log",
MaxSize: 500, // megabytes
MaxBackups: 3,
MaxAge: 28, // days
})
}
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/linux_test.go 0 → 100644
// +build linux
package lumberjack
import (
"os"
"syscall"
"testing"
)
func TestMaintainMode(t *testing.T) {
currentTime = fakeTime
dir := makeTempDir("TestMaintainMode", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
mode := os.FileMode(0770)
f, err := os.OpenFile(filename, os.O_CREATE|os.O_RDWR, mode)
isNil(err, t)
f.Close()
l := &Logger{
Filename: filename,
MaxBackups: 1,
MaxSize: 100, // megabytes
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
newFakeTime()
err = l.Rotate()
isNil(err, t)
filename2 := backupFile(dir)
info, err := os.Stat(filename)
isNil(err, t)
info2, err := os.Stat(filename2)
isNil(err, t)
equals(mode, info.Mode(), t)
equals(mode, info2.Mode(), t)
}
func TestMaintainOwner(t *testing.T) {
fakeC := fakeChown{}
os_Chown = fakeC.Set
os_Stat = fakeStat
defer func() {
os_Chown = os.Chown
os_Stat = os.Stat
}()
currentTime = fakeTime
dir := makeTempDir("TestMaintainOwner", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
l := &Logger{
Filename: filename,
MaxBackups: 1,
MaxSize: 100, // megabytes
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
newFakeTime()
err = l.Rotate()
isNil(err, t)
equals(555, fakeC.uid, t)
equals(666, fakeC.gid, t)
}
type fakeChown struct {
name string
uid int
gid int
}
func (f *fakeChown) Set(name string, uid, gid int) error {
f.name = name
f.uid = uid
f.gid = gid
return nil
}
func fakeStat(name string) (os.FileInfo, error) {
info, err := os.Stat(name)
if err != nil {
return info, err
}
stat := info.Sys().(*syscall.Stat_t)
stat.Uid = 555
stat.Gid = 666
return info, nil
}
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/lumberjack.go 0 → 100644
// Package lumberjack provides a rolling logger.
//
// Note that this is v2.0 of lumberjack, and should be imported using gopkg.in
// thusly:
//
// import "gopkg.in/natefinch/lumberjack.v2"
//
// The package name remains simply lumberjack, and the code resides at
// https://github.com/natefinch/lumberjack under the v2.0 branch.
//
// Lumberjack is intended to be one part of a logging infrastructure.
// It is not an all-in-one solution, but instead is a pluggable
// component at the bottom of the logging stack that simply controls the files
// to which logs are written.
//
// Lumberjack plays well with any logging package that can write to an
// io.Writer, including the standard library's log package.
//
// Lumberjack assumes that only one process is writing to the output files.
// Using the same lumberjack configuration from multiple processes on the same
// machine will result in improper behavior.
package lumberjack
import (
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"sort"
"strings"
"sync"
"time"
)
const (
backupTimeFormat = "2006-01-02T15-04-05.000"
defaultMaxSize = 100
)
// ensure we always implement io.WriteCloser
var _ io.WriteCloser = (*Logger)(nil)
// Logger is an io.WriteCloser that writes to the specified filename.
//
// Logger opens or creates the logfile on first Write. If the file exists and
// is less than MaxSize megabytes, lumberjack will open and append to that file.
// If the file exists and its size is >= MaxSize megabytes, the file is renamed
// by putting the current time in a timestamp in the name immediately before the
// file's extension (or the end of the filename if there's no extension). A new
// log file is then created using original filename.
//
// Whenever a write would cause the current log file exceed MaxSize megabytes,
// the current file is closed, renamed, and a new log file created with the
// original name. Thus, the filename you give Logger is always the "current" log
// file.
//
// Cleaning Up Old Log Files
//
// Whenever a new logfile gets created, old log files may be deleted. The most
// recent files according to the encoded timestamp will be retained, up to a
// number equal to MaxBackups (or all of them if MaxBackups is 0). Any files
// with an encoded timestamp older than MaxAge days are deleted, regardless of
// MaxBackups. Note that the time encoded in the timestamp is the rotation
// time, which may differ from the last time that file was written to.
//
// If MaxBackups and MaxAge are both 0, no old log files will be deleted.
type Logger struct {
// Filename is the file to write logs to. Backup log files will be retained
// in the same directory. It uses <processname>-lumberjack.log in
// os.TempDir() if empty.
Filename string `json:"filename" yaml:"filename"`
// MaxSize is the maximum size in megabytes of the log file before it gets
// rotated. It defaults to 100 megabytes.
MaxSize int `json:"maxsize" yaml:"maxsize"`
// MaxAge is the maximum number of days to retain old log files based on the
// timestamp encoded in their filename. Note that a day is defined as 24
// hours and may not exactly correspond to calendar days due to daylight
// savings, leap seconds, etc. The default is not to remove old log files
// based on age.
MaxAge int `json:"maxage" yaml:"maxage"`
// MaxBackups is the maximum number of old log files to retain. The default
// is to retain all old log files (though MaxAge may still cause them to get
// deleted.)
MaxBackups int `json:"maxbackups" yaml:"maxbackups"`
// LocalTime determines if the time used for formatting the timestamps in
// backup files is the computer's local time. The default is to use UTC
// time.
LocalTime bool `json:"localtime" yaml:"localtime"`
size int64
file *os.File
mu sync.Mutex
}
var (
// currentTime exists so it can be mocked out by tests.
currentTime = time.Now
// os_Stat exists so it can be mocked out by tests.
os_Stat = os.Stat
// megabyte is the conversion factor between MaxSize and bytes. It is a
// variable so tests can mock it out and not need to write megabytes of data
// to disk.
megabyte = 1024 * 1024
)
// Write implements io.Writer. If a write would cause the log file to be larger
// than MaxSize, the file is closed, renamed to include a timestamp of the
// current time, and a new log file is created using the original log file name.
// If the length of the write is greater than MaxSize, an error is returned.
func (l *Logger) Write(p []byte) (n int, err error) {
l.mu.Lock()
defer l.mu.Unlock()
writeLen := int64(len(p))
if writeLen > l.max() {
return 0, fmt.Errorf(
"write length %d exceeds maximum file size %d", writeLen, l.max(),
)
}
if l.file == nil {
if err = l.openExistingOrNew(len(p)); err != nil {
return 0, err
}
}
if l.size+writeLen > l.max() {
if err := l.rotate(); err != nil {
return 0, err
}
}
n, err = l.file.Write(p)
l.size += int64(n)
return n, err
}
// Close implements io.Closer, and closes the current logfile.
func (l *Logger) Close() error {
l.mu.Lock()
defer l.mu.Unlock()
return l.close()
}
// close closes the file if it is open.
func (l *Logger) close() error {
if l.file == nil {
return nil
}
err := l.file.Close()
l.file = nil
return err
}
// Rotate causes Logger to close the existing log file and immediately create a
// new one. This is a helper function for applications that want to initiate
// rotations outside of the normal rotation rules, such as in response to
// SIGHUP. After rotating, this initiates a cleanup of old log files according
// to the normal rules.
func (l *Logger) Rotate() error {
l.mu.Lock()
defer l.mu.Unlock()
return l.rotate()
}
// rotate closes the current file, moves it aside with a timestamp in the name,
// (if it exists), opens a new file with the original filename, and then runs
// cleanup.
func (l *Logger) rotate() error {
if err := l.close(); err != nil {
return err
}
if err := l.openNew(); err != nil {
return err
}
return l.cleanup()
}
// openNew opens a new log file for writing, moving any old log file out of the
// way. This methods assumes the file has already been closed.
func (l *Logger) openNew() error {
err := os.MkdirAll(l.dir(), 0744)
if err != nil {
return fmt.Errorf("can't make directories for new logfile: %s", err)
}
name := l.filename()
mode := os.FileMode(0644)
info, err := os_Stat(name)
if err == nil {
// Copy the mode off the old logfile.
mode = info.Mode()
// move the existing file
newname := backupName(name, l.LocalTime)
if err := os.Rename(name, newname); err != nil {
return fmt.Errorf("can't rename log file: %s", err)
}
// this is a no-op anywhere but linux
if err := chown(name, info); err != nil {
return err
}
}
// we use truncate here because this should only get called when we've moved
// the file ourselves. if someone else creates the file in the meantime,
// just wipe out the contents.
f, err := os.OpenFile(name, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, mode)
if err != nil {
return fmt.Errorf("can't open new logfile: %s", err)
}
l.file = f
l.size = 0
return nil
}
// backupName creates a new filename from the given name, inserting a timestamp
// between the filename and the extension, using the local time if requested
// (otherwise UTC).
func backupName(name string, local bool) string {
dir := filepath.Dir(name)
filename := filepath.Base(name)
ext := filepath.Ext(filename)
prefix := filename[:len(filename)-len(ext)]
t := currentTime()
if !local {
t = t.UTC()
}
timestamp := t.Format(backupTimeFormat)
return filepath.Join(dir, fmt.Sprintf("%s-%s%s", prefix, timestamp, ext))
}
// openExistingOrNew opens the logfile if it exists and if the current write
// would not put it over MaxSize. If there is no such file or the write would
// put it over the MaxSize, a new file is created.
func (l *Logger) openExistingOrNew(writeLen int) error {
filename := l.filename()
info, err := os_Stat(filename)
if os.IsNotExist(err) {
return l.openNew()
}
if err != nil {
return fmt.Errorf("error getting log file info: %s", err)
}
// the first file we find that matches our pattern will be the most
// recently modified log file.
if info.Size()+int64(writeLen) < l.max() {
file, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY, 0644)
if err == nil {
l.file = file
l.size = info.Size()
return nil
}
// if we fail to open the old log file for some reason, just ignore
// it and open a new log file.
}
return l.openNew()
}
// genFilename generates the name of the logfile from the current time.
func (l *Logger) filename() string {
if l.Filename != "" {
return l.Filename
}
name := filepath.Base(os.Args[0]) + "-lumberjack.log"
return filepath.Join(os.TempDir(), name)
}
// cleanup deletes old log files, keeping at most l.MaxBackups files, as long as
// none of them are older than MaxAge.
func (l *Logger) cleanup() error {
if l.MaxBackups == 0 && l.MaxAge == 0 {
return nil
}
files, err := l.oldLogFiles()
if err != nil {
return err
}
var deletes []logInfo
if l.MaxBackups > 0 && l.MaxBackups < len(files) {
deletes = files[l.MaxBackups:]
files = files[:l.MaxBackups]
}
if l.MaxAge > 0 {
diff := time.Duration(int64(24*time.Hour) * int64(l.MaxAge))
cutoff := currentTime().Add(-1 * diff)
for _, f := range files {
if f.timestamp.Before(cutoff) {
deletes = append(deletes, f)
}
}
}
if len(deletes) == 0 {
return nil
}
go deleteAll(l.dir(), deletes)
return nil
}
func deleteAll(dir string, files []logInfo) {
// remove files on a separate goroutine
for _, f := range files {
// what am I going to do, log this?
_ = os.Remove(filepath.Join(dir, f.Name()))
}
}
// oldLogFiles returns the list of backup log files stored in the same
// directory as the current log file, sorted by ModTime
func (l *Logger) oldLogFiles() ([]logInfo, error) {
files, err := ioutil.ReadDir(l.dir())
if err != nil {
return nil, fmt.Errorf("can't read log file directory: %s", err)
}
logFiles := []logInfo{}
prefix, ext := l.prefixAndExt()
for _, f := range files {
if f.IsDir() {
continue
}
name := l.timeFromName(f.Name(), prefix, ext)
if name == "" {
continue
}
t, err := time.Parse(backupTimeFormat, name)
if err == nil {
logFiles = append(logFiles, logInfo{t, f})
}
}
sort.Sort(byFormatTime(logFiles))
return logFiles, nil
}
// timeFromName extracts the formatted time from the filename by stripping off
// the filename's prefix and extension. This prevents someone's filename from
// confusing time.parse.
func (l *Logger) timeFromName(filename, prefix, ext string) string {
if !strings.HasPrefix(filename, prefix) {
return ""
}
filename = filename[len(prefix):]
if !strings.HasSuffix(filename, ext) {
return ""
}
filename = filename[:len(filename)-len(ext)]
return filename
}
// max returns the maximum size in bytes of log files before rolling.
func (l *Logger) max() int64 {
if l.MaxSize == 0 {
return int64(defaultMaxSize * megabyte)
}
return int64(l.MaxSize) * int64(megabyte)
}
// dir returns the directory for the current filename.
func (l *Logger) dir() string {
return filepath.Dir(l.filename())
}
// prefixAndExt returns the filename part and extension part from the Logger's
// filename.
func (l *Logger) prefixAndExt() (prefix, ext string) {
filename := filepath.Base(l.filename())
ext = filepath.Ext(filename)
prefix = filename[:len(filename)-len(ext)] + "-"
return prefix, ext
}
// logInfo is a convenience struct to return the filename and its embedded
// timestamp.
type logInfo struct {
timestamp time.Time
os.FileInfo
}
// byFormatTime sorts by newest time formatted in the name.
type byFormatTime []logInfo
func (b byFormatTime) Less(i, j int) bool {
return b[i].timestamp.After(b[j].timestamp)
}
func (b byFormatTime) Swap(i, j int) {
b[i], b[j] = b[j], b[i]
}
func (b byFormatTime) Len() int {
return len(b)
}
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/lumberjack_test.go 0 → 100644
package lumberjack
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
"github.com/BurntSushi/toml"
"gopkg.in/yaml.v1"
)
// !!!NOTE!!!
//
// Running these tests in parallel will almost certainly cause sporadic (or even
// regular) failures, because they're all messing with the same global variable
// that controls the logic's mocked time.Now. So... don't do that.
// Since all the tests uses the time to determine filenames etc, we need to
// control the wall clock as much as possible, which means having a wall clock
// that doesn't change unless we want it to.
var fakeCurrentTime = time.Now()
func fakeTime() time.Time {
return fakeCurrentTime
}
func TestNewFile(t *testing.T) {
currentTime = fakeTime
dir := makeTempDir("TestNewFile", t)
defer os.RemoveAll(dir)
l := &Logger{
Filename: logFile(dir),
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
existsWithLen(logFile(dir), n, t)
fileCount(dir, 1, t)
}
func TestOpenExisting(t *testing.T) {
currentTime = fakeTime
dir := makeTempDir("TestOpenExisting", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
data := []byte("foo!")
err := ioutil.WriteFile(filename, data, 0644)
isNil(err, t)
existsWithLen(filename, len(data), t)
l := &Logger{
Filename: filename,
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
// make sure the file got appended
existsWithLen(filename, len(data)+n, t)
// make sure no other files were created
fileCount(dir, 1, t)
}
func TestWriteTooLong(t *testing.T) {
currentTime = fakeTime
megabyte = 1
dir := makeTempDir("TestWriteTooLong", t)
defer os.RemoveAll(dir)
l := &Logger{
Filename: logFile(dir),
MaxSize: 5,
}
defer l.Close()
b := []byte("booooooooooooooo!")
n, err := l.Write(b)
notNil(err, t)
equals(0, n, t)
equals(err.Error(),
fmt.Sprintf("write length %d exceeds maximum file size %d", len(b), l.MaxSize), t)
_, err = os.Stat(logFile(dir))
assert(os.IsNotExist(err), t, "File exists, but should not have been created")
}
func TestMakeLogDir(t *testing.T) {
currentTime = fakeTime
dir := time.Now().Format("TestMakeLogDir" + backupTimeFormat)
dir = filepath.Join(os.TempDir(), dir)
defer os.RemoveAll(dir)
filename := logFile(dir)
l := &Logger{
Filename: filename,
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
existsWithLen(logFile(dir), n, t)
fileCount(dir, 1, t)
}
func TestDefaultFilename(t *testing.T) {
currentTime = fakeTime
dir := os.TempDir()
filename := filepath.Join(dir, filepath.Base(os.Args[0])+"-lumberjack.log")
defer os.Remove(filename)
l := &Logger{}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
existsWithLen(filename, n, t)
}
func TestAutoRotate(t *testing.T) {
currentTime = fakeTime
megabyte = 1
dir := makeTempDir("TestAutoRotate", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
l := &Logger{
Filename: filename,
MaxSize: 10,
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
existsWithLen(filename, n, t)
fileCount(dir, 1, t)
newFakeTime()
b2 := []byte("foooooo!")
n, err = l.Write(b2)
isNil(err, t)
equals(len(b2), n, t)
// the old logfile should be moved aside and the main logfile should have
// only the last write in it.
existsWithLen(filename, n, t)
// the backup file will use the current fake time and have the old contents.
existsWithLen(backupFile(dir), len(b), t)
fileCount(dir, 2, t)
}
func TestFirstWriteRotate(t *testing.T) {
currentTime = fakeTime
megabyte = 1
dir := makeTempDir("TestFirstWriteRotate", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
l := &Logger{
Filename: filename,
MaxSize: 10,
}
defer l.Close()
start := []byte("boooooo!")
err := ioutil.WriteFile(filename, start, 0600)
isNil(err, t)
newFakeTime()
// this would make us rotate
b := []byte("fooo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
existsWithLen(filename, n, t)
existsWithLen(backupFile(dir), len(start), t)
fileCount(dir, 2, t)
}
func TestMaxBackups(t *testing.T) {
currentTime = fakeTime
megabyte = 1
dir := makeTempDir("TestMaxBackups", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
l := &Logger{
Filename: filename,
MaxSize: 10,
MaxBackups: 1,
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
existsWithLen(filename, n, t)
fileCount(dir, 1, t)
newFakeTime()
// this will put us over the max
b2 := []byte("foooooo!")
n, err = l.Write(b2)
isNil(err, t)
equals(len(b2), n, t)
// this will use the new fake time
secondFilename := backupFile(dir)
existsWithLen(secondFilename, len(b), t)
// make sure the old file still exists with the same size.
existsWithLen(filename, n, t)
fileCount(dir, 2, t)
newFakeTime()
// this will make us rotate again
n, err = l.Write(b2)
isNil(err, t)
equals(len(b2), n, t)
// this will use the new fake time
thirdFilename := backupFile(dir)
existsWithLen(thirdFilename, len(b2), t)
existsWithLen(filename, n, t)
// we need to wait a little bit since the files get deleted on a different
// goroutine.
<-time.After(time.Millisecond * 10)
// should only have two files in the dir still
fileCount(dir, 2, t)
// second file name should still exist
existsWithLen(thirdFilename, len(b2), t)
// should have deleted the first backup
notExist(secondFilename, t)
// now test that we don't delete directories or non-logfile files
newFakeTime()
// create a file that is close to but different from the logfile name.
// It shouldn't get caught by our deletion filters.
notlogfile := logFile(dir) + ".foo"
err = ioutil.WriteFile(notlogfile, []byte("data"), 0644)
isNil(err, t)
// Make a directory that exactly matches our log file filters... it still
// shouldn't get caught by the deletion filter since it's a directory.
notlogfiledir := backupFile(dir)
err = os.Mkdir(notlogfiledir, 0700)
isNil(err, t)
newFakeTime()
// this will make us rotate again
n, err = l.Write(b2)
isNil(err, t)
equals(len(b2), n, t)
// this will use the new fake time
fourthFilename := backupFile(dir)
existsWithLen(fourthFilename, len(b2), t)
// we need to wait a little bit since the files get deleted on a different
// goroutine.
<-time.After(time.Millisecond * 10)
// We should have four things in the directory now - the 2 log files, the
// not log file, and the directory
fileCount(dir, 4, t)
// third file name should still exist
existsWithLen(filename, n, t)
existsWithLen(fourthFilename, len(b2), t)
// should have deleted the first filename
notExist(thirdFilename, t)
// the not-a-logfile should still exist
exists(notlogfile, t)
// the directory
exists(notlogfiledir, t)
}
func TestMaxAge(t *testing.T) {
currentTime = fakeTime
megabyte = 1
dir := makeTempDir("TestMaxAge", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
l := &Logger{
Filename: filename,
MaxSize: 10,
MaxAge: 1,
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
existsWithLen(filename, n, t)
fileCount(dir, 1, t)
// two days later
newFakeTime()
b2 := []byte("foooooo!")
n, err = l.Write(b2)
isNil(err, t)
equals(len(b2), n, t)
existsWithLen(backupFile(dir), len(b), t)
// we need to wait a little bit since the files get deleted on a different
// goroutine.
<-time.After(10 * time.Millisecond)
// We should still have 2 log files, since the most recent backup was just
// created.
fileCount(dir, 2, t)
existsWithLen(filename, len(b2), t)
// we should have deleted the old file due to being too old
existsWithLen(backupFile(dir), len(b), t)
// two days later
newFakeTime()
b3 := []byte("foooooo!")
n, err = l.Write(b2)
isNil(err, t)
equals(len(b3), n, t)
existsWithLen(backupFile(dir), len(b2), t)
// we need to wait a little bit since the files get deleted on a different
// goroutine.
<-time.After(10 * time.Millisecond)
// We should have 2 log files - the main log file, and the most recent
// backup. The earlier backup is past the cutoff and should be gone.
fileCount(dir, 2, t)
existsWithLen(filename, len(b3), t)
// we should have deleted the old file due to being too old
existsWithLen(backupFile(dir), len(b2), t)
}
func TestOldLogFiles(t *testing.T) {
currentTime = fakeTime
megabyte = 1
dir := makeTempDir("TestOldLogFiles", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
data := []byte("data")
err := ioutil.WriteFile(filename, data, 07)
isNil(err, t)
// This gives us a time with the same precision as the time we get from the
// timestamp in the name.
t1, err := time.Parse(backupTimeFormat, fakeTime().UTC().Format(backupTimeFormat))
isNil(err, t)
backup := backupFile(dir)
err = ioutil.WriteFile(backup, data, 07)
isNil(err, t)
newFakeTime()
t2, err := time.Parse(backupTimeFormat, fakeTime().UTC().Format(backupTimeFormat))
isNil(err, t)
backup2 := backupFile(dir)
err = ioutil.WriteFile(backup2, data, 07)
isNil(err, t)
l := &Logger{Filename: filename}
files, err := l.oldLogFiles()
isNil(err, t)
equals(2, len(files), t)
// should be sorted by newest file first, which would be t2
equals(t2, files[0].timestamp, t)
equals(t1, files[1].timestamp, t)
}
func TestTimeFromName(t *testing.T) {
l := &Logger{Filename: "/var/log/myfoo/foo.log"}
prefix, ext := l.prefixAndExt()
val := l.timeFromName("foo-2014-05-04T14-44-33.555.log", prefix, ext)
equals("2014-05-04T14-44-33.555", val, t)
val = l.timeFromName("foo-2014-05-04T14-44-33.555", prefix, ext)
equals("", val, t)
val = l.timeFromName("2014-05-04T14-44-33.555.log", prefix, ext)
equals("", val, t)
val = l.timeFromName("foo.log", prefix, ext)
equals("", val, t)
}
func TestLocalTime(t *testing.T) {
currentTime = fakeTime
megabyte = 1
dir := makeTempDir("TestLocalTime", t)
defer os.RemoveAll(dir)
l := &Logger{
Filename: logFile(dir),
MaxSize: 10,
LocalTime: true,
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
b2 := []byte("fooooooo!")
n2, err := l.Write(b2)
isNil(err, t)
equals(len(b2), n2, t)
existsWithLen(logFile(dir), n2, t)
existsWithLen(backupFileLocal(dir), n, t)
}
func TestRotate(t *testing.T) {
currentTime = fakeTime
dir := makeTempDir("TestRotate", t)
defer os.RemoveAll(dir)
filename := logFile(dir)
l := &Logger{
Filename: filename,
MaxBackups: 1,
MaxSize: 100, // megabytes
}
defer l.Close()
b := []byte("boo!")
n, err := l.Write(b)
isNil(err, t)
equals(len(b), n, t)
existsWithLen(filename, n, t)
fileCount(dir, 1, t)
newFakeTime()
err = l.Rotate()
isNil(err, t)
// we need to wait a little bit since the files get deleted on a different
// goroutine.
<-time.After(10 * time.Millisecond)
filename2 := backupFile(dir)
existsWithLen(filename2, n, t)
existsWithLen(filename, 0, t)
fileCount(dir, 2, t)
newFakeTime()
err = l.Rotate()
isNil(err, t)
// we need to wait a little bit since the files get deleted on a different
// goroutine.
<-time.After(10 * time.Millisecond)
filename3 := backupFile(dir)
existsWithLen(filename3, 0, t)
existsWithLen(filename, 0, t)
fileCount(dir, 2, t)
b2 := []byte("foooooo!")
n, err = l.Write(b2)
isNil(err, t)
equals(len(b2), n, t)
// this will use the new fake time
existsWithLen(filename, n, t)
}
func TestJson(t *testing.T) {
data := []byte(`
{
"filename": "foo",
"maxsize": 5,
"maxage": 10,
"maxbackups": 3,
"localtime": true
}`[1:])
l := Logger{}
err := json.Unmarshal(data, &l)
isNil(err, t)
equals("foo", l.Filename, t)
equals(5, l.MaxSize, t)
equals(10, l.MaxAge, t)
equals(3, l.MaxBackups, t)
equals(true, l.LocalTime, t)
}
func TestYaml(t *testing.T) {
data := []byte(`
filename: foo
maxsize: 5
maxage: 10
maxbackups: 3
localtime: true`[1:])
l := Logger{}
err := yaml.Unmarshal(data, &l)
isNil(err, t)
equals("foo", l.Filename, t)
equals(5, l.MaxSize, t)
equals(10, l.MaxAge, t)
equals(3, l.MaxBackups, t)
equals(true, l.LocalTime, t)
}
func TestToml(t *testing.T) {
data := `
filename = "foo"
maxsize = 5
maxage = 10
maxbackups = 3
localtime = true`[1:]
l := Logger{}
md, err := toml.Decode(data, &l)
isNil(err, t)
equals("foo", l.Filename, t)
equals(5, l.MaxSize, t)
equals(10, l.MaxAge, t)
equals(3, l.MaxBackups, t)
equals(true, l.LocalTime, t)
equals(0, len(md.Undecoded()), t)
}
// makeTempDir creates a file with a semi-unique name in the OS temp directory.
// It should be based on the name of the test, to keep parallel tests from
// colliding, and must be cleaned up after the test is finished.
func makeTempDir(name string, t testing.TB) string {
dir := time.Now().Format(name + backupTimeFormat)
dir = filepath.Join(os.TempDir(), dir)
isNilUp(os.Mkdir(dir, 0777), t, 1)
return dir
}
// existsWithLen checks that the given file exists and has the correct length.
func existsWithLen(path string, length int, t testing.TB) {
info, err := os.Stat(path)
isNilUp(err, t, 1)
equalsUp(int64(length), info.Size(), t, 1)
}
// logFile returns the log file name in the given directory for the current fake
// time.
func logFile(dir string) string {
return filepath.Join(dir, "foobar.log")
}
func backupFile(dir string) string {
return filepath.Join(dir, "foobar-"+fakeTime().UTC().Format(backupTimeFormat)+".log")
}
func backupFileLocal(dir string) string {
return filepath.Join(dir, "foobar-"+fakeTime().Format(backupTimeFormat)+".log")
}
// logFileLocal returns the log file name in the given directory for the current
// fake time using the local timezone.
func logFileLocal(dir string) string {
return filepath.Join(dir, fakeTime().Format(backupTimeFormat))
}
// fileCount checks that the number of files in the directory is exp.
func fileCount(dir string, exp int, t testing.TB) {
files, err := ioutil.ReadDir(dir)
isNilUp(err, t, 1)
// Make sure no other files were created.
equalsUp(exp, len(files), t, 1)
}
// newFakeTime sets the fake "current time" to two days later.
func newFakeTime() {
fakeCurrentTime = fakeCurrentTime.Add(time.Hour * 24 * 2)
}
func notExist(path string, t testing.TB) {
_, err := os.Stat(path)
assertUp(os.IsNotExist(err), t, 1, "expected to get os.IsNotExist, but instead got %v", err)
}
func exists(path string, t testing.TB) {
_, err := os.Stat(path)
assertUp(err == nil, t, 1, "expected file to exist, but got error from os.Stat: %v", err)
}
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/rotate_test.go 0 → 100644
// +build linux
package lumberjack_test
import (
"log"
"os"
"os/signal"
"syscall"
"github.com/natefinch/lumberjack"
)
// Example of how to rotate in response to SIGHUP.
func ExampleLogger_Rotate() {
l := &lumberjack.Logger{}
log.SetOutput(l)
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGHUP)
go func() {
for {
<-c
l.Rotate()
}
}()
}
Godeps/_workspace/src/gopkg.in/natefinch/lumberjack.v2/testing_test.go 0 → 100644
package lumberjack
import (
"fmt"
"path/filepath"
"reflect"
"runtime"
"testing"
)
// assert will log the given message if condition is false.
func assert(condition bool, t testing.TB, msg string, v ...interface{}) {
assertUp(condition, t, 1, msg, v...)
}
// assertUp is like assert, but used inside helper functions, to ensure that
// the file and line number reported by failures corresponds to one or more
// levels up the stack.
func assertUp(condition bool, t testing.TB, caller int, msg string, v ...interface{}) {
if !condition {
_, file, line, _ := runtime.Caller(caller + 1)
v = append([]interface{}{filepath.Base(file), line}, v...)
fmt.Printf("%s:%d: "+msg+"\n", v...)
t.FailNow()
}
}
// equals tests that the two values are equal according to reflect.DeepEqual.
func equals(exp, act interface{}, t testing.TB) {
equalsUp(exp, act, t, 1)
}
// equalsUp is like equals, but used inside helper functions, to ensure that the
// file and line number reported by failures corresponds to one or more levels
// up the stack.
func equalsUp(exp, act interface{}, t testing.TB, caller int) {
if !reflect.DeepEqual(exp, act) {
_, file, line, _ := runtime.Caller(caller + 1)
fmt.Printf("%s:%d: exp: %v (%T), got: %v (%T)\n",
filepath.Base(file), line, exp, exp, act, act)
t.FailNow()
}
}
// isNil reports a failure if the given value is not nil. Note that values
// which cannot be nil will always fail this check.
func isNil(obtained interface{}, t testing.TB) {
isNilUp(obtained, t, 1)
}
// isNilUp is like isNil, but used inside helper functions, to ensure that the
// file and line number reported by failures corresponds to one or more levels
// up the stack.
func isNilUp(obtained interface{}, t testing.TB, caller int) {
if !_isNil(obtained) {
_, file, line, _ := runtime.Caller(caller + 1)
fmt.Printf("%s:%d: expected nil, got: %v\n", filepath.Base(file), line, obtained)
t.FailNow()
}
}
// notNil reports a failure if the given value is nil.
func notNil(obtained interface{}, t testing.TB) {
notNilUp(obtained, t, 1)
}
// notNilUp is like notNil, but used inside helper functions, to ensure that the
// file and line number reported by failures corresponds to one or more levels
// up the stack.
func notNilUp(obtained interface{}, t testing.TB, caller int) {
if _isNil(obtained) {
_, file, line, _ := runtime.Caller(caller + 1)
fmt.Printf("%s:%d: expected non-nil, got: %v\n", filepath.Base(file), line, obtained)
t.FailNow()
}
}
// _isNil is a helper function for isNil and notNil, and should not be used
// directly.
func _isNil(obtained interface{}) bool {
if obtained == nil {
return true
}
switch v := reflect.ValueOf(obtained); v.Kind() {
case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
return v.IsNil()
}
return false
}
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