From a6a67ea9b28257fb18026c2d8ec5430edb7d2afd Mon Sep 17 00:00:00 2001
From: Jae Kwon <jae@tendermint.com>
Date: Wed, 26 Oct 2016 21:50:28 -0700
Subject: [PATCH] Remove AutoFile; Use go-autofile instead

---
 os.go | 154 ----------------------------------------------------------
 1 file changed, 154 deletions(-)

diff --git a/os.go b/os.go
index a273bec48..9f38027fa 100644
--- a/os.go
+++ b/os.go
@@ -7,19 +7,12 @@ import (
 	"os"
 	"os/signal"
 	"strings"
-	"sync"
-	"syscall"
-	"time"
 )
 
 var (
 	GoPath = os.Getenv("GOPATH")
 )
 
-func init() {
-	initAFSIGHUPWatcher()
-}
-
 func TrapSignal(cb func()) {
 	c := make(chan os.Signal, 1)
 	signal.Notify(c, os.Interrupt)
@@ -112,153 +105,6 @@ func WriteFileAtomic(filePath string, newBytes []byte, mode os.FileMode) error {
 
 //--------------------------------------------------------------------------------
 
-/* AutoFile usage
-
-// Create/Append to ./autofile_test
-af, err := OpenAutoFile("autofile_test")
-if err != nil {
-	panic(err)
-}
-
-// Stream of writes.
-// During this time, the file may be moved e.g. by logRotate.
-for i := 0; i < 60; i++ {
-	af.Write([]byte(Fmt("LOOP(%v)", i)))
-	time.Sleep(time.Second)
-}
-
-// Close the AutoFile
-err = af.Close()
-if err != nil {
-	panic(err)
-}
-*/
-
-const autoFileOpenDuration = 1000 * time.Millisecond
-
-// Automatically closes and re-opens file for writing.
-// This is useful for using a log file with the logrotate tool.
-type AutoFile struct {
-	ID     string
-	Path   string
-	ticker *time.Ticker
-	mtx    sync.Mutex
-	file   *os.File
-}
-
-func OpenAutoFile(path string) (af *AutoFile, err error) {
-	af = &AutoFile{
-		ID:     RandStr(12) + ":" + path,
-		Path:   path,
-		ticker: time.NewTicker(autoFileOpenDuration),
-	}
-	if err = af.openFile(); err != nil {
-		return
-	}
-	go af.processTicks()
-	autoFileWatchers.addAutoFile(af)
-	return
-}
-
-func (af *AutoFile) Close() error {
-	af.ticker.Stop()
-	err := af.closeFile()
-	autoFileWatchers.removeAutoFile(af)
-	return err
-}
-
-func (af *AutoFile) processTicks() {
-	for {
-		_, ok := <-af.ticker.C
-		if !ok {
-			return // Done.
-		}
-		af.closeFile()
-	}
-}
-
-func (af *AutoFile) closeFile() (err error) {
-	af.mtx.Lock()
-	defer af.mtx.Unlock()
-
-	file := af.file
-	if file == nil {
-		return nil
-	}
-	af.file = nil
-	return file.Close()
-}
-
-func (af *AutoFile) Write(b []byte) (n int, err error) {
-	af.mtx.Lock()
-	defer af.mtx.Unlock()
-	if af.file == nil {
-		if err = af.openFile(); err != nil {
-			return
-		}
-	}
-	return af.file.Write(b)
-}
-
-func (af *AutoFile) openFile() error {
-	file, err := os.OpenFile(af.Path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0600)
-	if err != nil {
-		return err
-	}
-	af.file = file
-	return nil
-}
-
-//--------------------------------------------------------------------------------
-
-var autoFileWatchers *afSIGHUPWatcher
-
-func initAFSIGHUPWatcher() {
-	autoFileWatchers = newAFSIGHUPWatcher()
-
-	c := make(chan os.Signal, 1)
-	signal.Notify(c, syscall.SIGHUP)
-
-	go func() {
-		for _ = range c {
-			autoFileWatchers.closeAll()
-		}
-	}()
-}
-
-type afSIGHUPWatcher struct {
-	mtx       sync.Mutex
-	autoFiles map[string]*AutoFile
-}
-
-func newAFSIGHUPWatcher() *afSIGHUPWatcher {
-	return &afSIGHUPWatcher{
-		autoFiles: make(map[string]*AutoFile, 10),
-	}
-}
-
-func (afw *afSIGHUPWatcher) addAutoFile(af *AutoFile) {
-	afw.mtx.Lock()
-	afw.autoFiles[af.ID] = af
-	afw.mtx.Unlock()
-}
-
-func (afw *afSIGHUPWatcher) removeAutoFile(af *AutoFile) {
-	afw.mtx.Lock()
-	delete(afw.autoFiles, af.ID)
-	afw.mtx.Unlock()
-}
-
-func (afw *afSIGHUPWatcher) closeAll() {
-	afw.mtx.Lock()
-	for _, af := range afw.autoFiles {
-		af.closeFile()
-	}
-	afw.mtx.Unlock()
-}
-
-//--------------------------------------------------------------------------------
-
 func Tempfile(prefix string) (*os.File, string) {
 	file, err := ioutil.TempFile("", prefix)
 	if err != nil {