# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

Nothing yet.

## [1.6.0] - 2022-10-13

This version of fsnotify needs Go 1.16 (this was already the case since 1.5.1,
but not documented). It also increases the minimum Linux version to 2.6.32.

### Additions

- all: add `Event.Has()` and `Op.Has()` ([#477])

  This makes checking events a lot easier; for example:

	    if event.Op&Write == Write && !(event.Op&Remove == Remove) {
	    }

	Becomes:

	    if event.Has(Write) && !event.Has(Remove) {
	    }

- all: add cmd/fsnotify ([#463])

  A command-line utility for testing and some examples.

### Changes and fixes

- inotify: don't ignore events for files that don't exist ([#260], [#470])

  Previously the inotify watcher would call `os.Lstat()` to check if a file
  still exists before emitting events.

  This was inconsistent with other platforms and resulted in inconsistent event
  reporting (e.g. when a file is quickly removed and re-created), and generally
  a source of confusion. It was added in 2013 to fix a memory leak that no
  longer exists.

- all: return `ErrNonExistentWatch` when `Remove()` is called on a path that's
  not watched ([#460])

- inotify: replace epoll() with non-blocking inotify ([#434])

  Non-blocking inotify was not generally available at the time this library was
  written in 2014, but now it is. As a result, the minimum Linux version is
  bumped from 2.6.27 to 2.6.32. This hugely simplifies the code and is faster.

- kqueue: don't check for events every 100ms ([#480])

  The watcher would wake up every 100ms, even when there was nothing to do. Now
  it waits until there is something to do.

- macos: retry opening files on EINTR ([#475])

- kqueue: skip unreadable files ([#479])

  kqueue requires a file descriptor for every file in a directory; this would
  fail if a file was unreadable by the current user. Now these files are simply
  skipped.

- windows: fix renaming a watched directory if the parent is also watched ([#370])

- windows: increase buffer size from 4K to 64K ([#485])

- windows: close file handle on Remove() ([#288])

- kqueue: put pathname in the error if watching a file fails ([#471])

- inotify, windows: calling Close() more than once could race ([#465])

- kqueue: improve Close() performance ([#233])

- all: various documentation additions and clarifications.

[#233]: https://github.com/fsnotify/fsnotify/pull/233
[#260]: https://github.com/fsnotify/fsnotify/pull/260
[#288]: https://github.com/fsnotify/fsnotify/pull/288
[#370]: https://github.com/fsnotify/fsnotify/pull/370
[#434]: https://github.com/fsnotify/fsnotify/pull/434
[#460]: https://github.com/fsnotify/fsnotify/pull/460
[#463]: https://github.com/fsnotify/fsnotify/pull/463
[#465]: https://github.com/fsnotify/fsnotify/pull/465
[#470]: https://github.com/fsnotify/fsnotify/pull/470
[#471]: https://github.com/fsnotify/fsnotify/pull/471
[#475]: https://github.com/fsnotify/fsnotify/pull/475
[#477]: https://github.com/fsnotify/fsnotify/pull/477
[#479]: https://github.com/fsnotify/fsnotify/pull/479
[#480]: https://github.com/fsnotify/fsnotify/pull/480
[#485]: https://github.com/fsnotify/fsnotify/pull/485

## [1.5.4] - 2022-04-25

* Windows: add missing defer to `Watcher.WatchList` [#447](https://github.com/fsnotify/fsnotify/pull/447)
* go.mod: use latest x/sys [#444](https://github.com/fsnotify/fsnotify/pull/444)
* Fix compilation for OpenBSD [#443](https://github.com/fsnotify/fsnotify/pull/443)

## [1.5.3] - 2022-04-22

* This version is retracted. An incorrect branch is published accidentally [#445](https://github.com/fsnotify/fsnotify/issues/445)

## [1.5.2] - 2022-04-21

* Add a feature to return the directories and files that are being monitored [#374](https://github.com/fsnotify/fsnotify/pull/374)
* Fix potential crash on windows if `raw.FileNameLength` exceeds `syscall.MAX_PATH` [#361](https://github.com/fsnotify/fsnotify/pull/361)
* Allow build on unsupported GOOS [#424](https://github.com/fsnotify/fsnotify/pull/424)
* Don't set `poller.fd` twice in `newFdPoller` [#406](https://github.com/fsnotify/fsnotify/pull/406)
* fix go vet warnings: call to `(*T).Fatalf` from a non-test goroutine [#416](https://github.com/fsnotify/fsnotify/pull/416)

## [1.5.1] - 2021-08-24

* Revert Add AddRaw to not follow symlinks [#394](https://github.com/fsnotify/fsnotify/pull/394)

## [1.5.0] - 2021-08-20

* Go: Increase minimum required version to Go 1.12 [#381](https://github.com/fsnotify/fsnotify/pull/381)
* Feature: Add AddRaw method which does not follow symlinks when adding a watch [#289](https://github.com/fsnotify/fsnotify/pull/298)
* Windows: Follow symlinks by default like on all other systems [#289](https://github.com/fsnotify/fsnotify/pull/289)
* CI: Use GitHub Actions for CI and cover go 1.12-1.17
   [#378](https://github.com/fsnotify/fsnotify/pull/378)
   [#381](https://github.com/fsnotify/fsnotify/pull/381)
   [#385](https://github.com/fsnotify/fsnotify/pull/385)
* Go 1.14+: Fix unsafe pointer conversion [#325](https://github.com/fsnotify/fsnotify/pull/325)

## [1.4.9] - 2020-03-11

* Move example usage to the readme #329. This may resolve #328.

## [1.4.8] - 2020-03-10

* CI: test more go versions (@nathany 1d13583d846ea9d66dcabbfefbfb9d8e6fb05216)
* Tests: Queued inotify events could have been read by the test before max_queued_events was hit (@matthias-stone #265)
* Tests:  t.Fatalf -> t.Errorf in go routines (@gdey #266)
* CI: Less verbosity (@nathany #267)
* Tests: Darwin: Exchangedata is deprecated on 10.13 (@nathany #267)
* Tests: Check if channels are closed in the example (@alexeykazakov #244)
* CI: Only run golint on latest version of go and fix issues (@cpuguy83 #284)
* CI: Add windows to travis matrix (@cpuguy83 #284)
* Docs: Remover appveyor badge (@nathany 11844c0959f6fff69ba325d097fce35bd85a8e93)
* Linux: create epoll and pipe fds with close-on-exec (@JohannesEbke #219)
* Linux: open files with close-on-exec (@linxiulei #273)
* Docs: Plan to support fanotify (@nathany ab058b44498e8b7566a799372a39d150d9ea0119 )
* Project: Add go.mod (@nathany #309)
* Project: Revise editor config (@nathany #309)
* Project: Update copyright for 2019 (@nathany #309)
* CI: Drop go1.8 from CI matrix (@nathany #309)
* Docs: Updating the FAQ section for supportability with NFS & FUSE filesystems (@Pratik32 4bf2d1fec78374803a39307bfb8d340688f4f28e )

## [1.4.7] - 2018-01-09

* BSD/macOS: Fix possible deadlock on closing the watcher on kqueue (thanks @nhooyr and @glycerine)
* Tests: Fix missing verb on format string (thanks @rchiossi)
* Linux: Fix deadlock in Remove (thanks @aarondl)
* Linux: Watch.Add improvements (avoid race, fix consistency, reduce garbage) (thanks @twpayne)
* Docs: Moved FAQ into the README (thanks @vahe)
* Linux: Properly handle inotify's IN_Q_OVERFLOW event (thanks @zeldovich)
* Docs: replace references to OS X with macOS

## [1.4.2] - 2016-10-10

* Linux: use InotifyInit1 with IN_CLOEXEC to stop leaking a file descriptor to a child process when using fork/exec [#178](https://github.com/fsnotify/fsnotify/pull/178) (thanks @pattyshack)

## [1.4.1] - 2016-10-04

* Fix flaky inotify stress test on Linux [#177](https://github.com/fsnotify/fsnotify/pull/177) (thanks @pattyshack)

## [1.4.0] - 2016-10-01

* add a String() method to Event.Op [#165](https://github.com/fsnotify/fsnotify/pull/165) (thanks @oozie)

## [1.3.1] - 2016-06-28

* Windows: fix for double backslash when watching the root of a drive [#151](https://github.com/fsnotify/fsnotify/issues/151) (thanks @brunoqc)

## [1.3.0] - 2016-04-19

* Support linux/arm64 by [patching](https://go-review.googlesource.com/#/c/21971/) x/sys/unix and switching to to it from syscall (thanks @suihkulokki) [#135](https://github.com/fsnotify/fsnotify/pull/135)

## [1.2.10] - 2016-03-02

* Fix golint errors in windows.go [#121](https://github.com/fsnotify/fsnotify/pull/121) (thanks @tiffanyfj)

## [1.2.9] - 2016-01-13

kqueue: Fix logic for CREATE after REMOVE [#111](https://github.com/fsnotify/fsnotify/pull/111) (thanks @bep)

## [1.2.8] - 2015-12-17

* kqueue: fix race condition in Close [#105](https://github.com/fsnotify/fsnotify/pull/105) (thanks @djui for reporting the issue and @ppknap for writing a failing test)
* inotify: fix race in test
* enable race detection for continuous integration (Linux, Mac, Windows)

## [1.2.5] - 2015-10-17

* inotify: use epoll_create1 for arm64 support (requires Linux 2.6.27 or later) [#100](https://github.com/fsnotify/fsnotify/pull/100) (thanks @suihkulokki)
* inotify: fix path leaks [#73](https://github.com/fsnotify/fsnotify/pull/73) (thanks @chamaken)
* kqueue: watch for rename events on subdirectories [#83](https://github.com/fsnotify/fsnotify/pull/83) (thanks @guotie)
* kqueue: avoid infinite loops from symlinks cycles [#101](https://github.com/fsnotify/fsnotify/pull/101) (thanks @illicitonion)

## [1.2.1] - 2015-10-14

* kqueue: don't watch named pipes [#98](https://github.com/fsnotify/fsnotify/pull/98) (thanks @evanphx)

## [1.2.0] - 2015-02-08

* inotify: use epoll to wake up readEvents [#66](https://github.com/fsnotify/fsnotify/pull/66) (thanks @PieterD)
* inotify: closing watcher should now always shut down goroutine [#63](https://github.com/fsnotify/fsnotify/pull/63) (thanks @PieterD)
* kqueue: close kqueue after removing watches, fixes [#59](https://github.com/fsnotify/fsnotify/issues/59)

## [1.1.1] - 2015-02-05

* inotify: Retry read on EINTR [#61](https://github.com/fsnotify/fsnotify/issues/61) (thanks @PieterD)

## [1.1.0] - 2014-12-12

* kqueue: rework internals [#43](https://github.com/fsnotify/fsnotify/pull/43)
    * add low-level functions
    * only need to store flags on directories
    * less mutexes [#13](https://github.com/fsnotify/fsnotify/issues/13)
    * done can be an unbuffered channel
    * remove calls to os.NewSyscallError
* More efficient string concatenation for Event.String() [#52](https://github.com/fsnotify/fsnotify/pull/52) (thanks @mdlayher)
* kqueue: fix regression in  rework causing subdirectories to be watched [#48](https://github.com/fsnotify/fsnotify/issues/48)
* kqueue: cleanup internal watch before sending remove event [#51](https://github.com/fsnotify/fsnotify/issues/51)

## [1.0.4] - 2014-09-07

* kqueue: add dragonfly to the build tags.
* Rename source code files, rearrange code so exported APIs are at the top.
* Add done channel to example code. [#37](https://github.com/fsnotify/fsnotify/pull/37) (thanks @chenyukang)

## [1.0.3] - 2014-08-19

* [Fix] Windows MOVED_TO now translates to Create like on BSD and Linux. [#36](https://github.com/fsnotify/fsnotify/issues/36)

## [1.0.2] - 2014-08-17

* [Fix] Missing create events on macOS. [#14](https://github.com/fsnotify/fsnotify/issues/14) (thanks @zhsso)
* [Fix] Make ./path and path equivalent. (thanks @zhsso)

## [1.0.0] - 2014-08-15

* [API] Remove AddWatch on Windows, use Add.
* Improve documentation for exported identifiers. [#30](https://github.com/fsnotify/fsnotify/issues/30)
* Minor updates based on feedback from golint.

## dev / 2014-07-09

* Moved to [github.com/fsnotify/fsnotify](https://github.com/fsnotify/fsnotify).
* Use os.NewSyscallError instead of returning errno (thanks @hariharan-uno)

## dev / 2014-07-04

* kqueue: fix incorrect mutex used in Close()
* Update example to demonstrate usage of Op.

## dev / 2014-06-28

* [API] Don't set the Write Op for attribute notifications [#4](https://github.com/fsnotify/fsnotify/issues/4)
* Fix for String() method on Event (thanks Alex Brainman)
* Don't build on Plan 9 or Solaris (thanks @4ad)

## dev / 2014-06-21

* Events channel of type Event rather than *Event.
* [internal] use syscall constants directly for inotify and kqueue.
* [internal] kqueue: rename events to kevents and fileEvent to event.

## dev / 2014-06-19

* Go 1.3+ required on Windows (uses syscall.ERROR_MORE_DATA internally).
* [internal] remove cookie from Event struct (unused).
* [internal] Event struct has the same definition across every OS.
* [internal] remove internal watch and removeWatch methods.

## dev / 2014-06-12

* [API] Renamed Watch() to Add() and RemoveWatch() to Remove().
* [API] Pluralized channel names: Events and Errors.
* [API] Renamed FileEvent struct to Event.
* [API] Op constants replace methods like IsCreate().

## dev / 2014-06-12

* Fix data race on kevent buffer (thanks @tilaks) [#98](https://github.com/howeyc/fsnotify/pull/98)

## dev / 2014-05-23

* [API] Remove current implementation of WatchFlags.
    * current implementation doesn't take advantage of OS for efficiency
    * provides little benefit over filtering events as they are received, but has  extra bookkeeping and mutexes
    * no tests for the current implementation
    * not fully implemented on Windows [#93](https://github.com/howeyc/fsnotify/issues/93#issuecomment-39285195)

## [0.9.3] - 2014-12-31

* kqueue: cleanup internal watch before sending remove event [#51](https://github.com/fsnotify/fsnotify/issues/51)

## [0.9.2] - 2014-08-17

* [Backport] Fix missing create events on macOS. [#14](https://github.com/fsnotify/fsnotify/issues/14) (thanks @zhsso)

## [0.9.1] - 2014-06-12

* Fix data race on kevent buffer (thanks @tilaks) [#98](https://github.com/howeyc/fsnotify/pull/98)

## [0.9.0] - 2014-01-17

* IsAttrib() for events that only concern a file's metadata [#79][] (thanks @abustany)
* [Fix] kqueue: fix deadlock [#77][] (thanks @cespare)
* [NOTICE] Development has moved to `code.google.com/p/go.exp/fsnotify` in preparation for inclusion in the Go standard library.

## [0.8.12] - 2013-11-13

* [API] Remove FD_SET and friends from Linux adapter

## [0.8.11] - 2013-11-02

* [Doc] Add Changelog [#72][] (thanks @nathany)
* [Doc] Spotlight and double modify events on macOS [#62][] (reported by @paulhammond)

## [0.8.10] - 2013-10-19

* [Fix] kqueue: remove file watches when parent directory is removed [#71][] (reported by @mdwhatcott)
* [Fix] kqueue: race between Close and readEvents [#70][] (reported by @bernerdschaefer)
* [Doc] specify OS-specific limits in README (thanks @debrando)

## [0.8.9] - 2013-09-08

* [Doc] Contributing (thanks @nathany)
* [Doc] update package path in example code [#63][] (thanks @paulhammond)
* [Doc] GoCI badge in README (Linux only) [#60][]
* [Doc] Cross-platform testing with Vagrant  [#59][] (thanks @nathany)

## [0.8.8] - 2013-06-17

* [Fix] Windows: handle `ERROR_MORE_DATA` on Windows [#49][] (thanks @jbowtie)

## [0.8.7] - 2013-06-03

* [API] Make syscall flags internal
* [Fix] inotify: ignore event changes
* [Fix] race in symlink test [#45][] (reported by @srid)
* [Fix] tests on Windows
* lower case error messages

## [0.8.6] - 2013-05-23

* kqueue: Use EVT_ONLY flag on Darwin
* [Doc] Update README with full example

## [0.8.5] - 2013-05-09

* [Fix] inotify: allow monitoring of "broken" symlinks (thanks @tsg)

## [0.8.4] - 2013-04-07

* [Fix] kqueue: watch all file events [#40][] (thanks @ChrisBuchholz)

## [0.8.3] - 2013-03-13

* [Fix] inoitfy/kqueue memory leak [#36][] (reported by @nbkolchin)
* [Fix] kqueue: use fsnFlags for watching a directory [#33][] (reported by @nbkolchin)

## [0.8.2] - 2013-02-07

* [Doc] add Authors
* [Fix] fix data races for map access [#29][] (thanks @fsouza)

## [0.8.1] - 2013-01-09

* [Fix] Windows path separators
* [Doc] BSD License

## [0.8.0] - 2012-11-09

* kqueue: directory watching improvements (thanks @vmirage)
* inotify: add `IN_MOVED_TO` [#25][] (requested by @cpisto)
* [Fix] kqueue: deleting watched directory [#24][] (reported by @jakerr)

## [0.7.4] - 2012-10-09

* [Fix] inotify: fixes from https://codereview.appspot.com/5418045/ (ugorji)
* [Fix] kqueue: preserve watch flags when watching for delete [#21][] (reported by @robfig)
* [Fix] kqueue: watch the directory even if it isn't a new watch (thanks @robfig)
* [Fix] kqueue: modify after recreation of file

## [0.7.3] - 2012-09-27

* [Fix] kqueue: watch with an existing folder inside the watched folder (thanks @vmirage)
* [Fix] kqueue: no longer get duplicate CREATE events

## [0.7.2] - 2012-09-01

* kqueue: events for created directories

## [0.7.1] - 2012-07-14

* [Fix] for renaming files

## [0.7.0] - 2012-07-02

* [Feature] FSNotify flags
* [Fix] inotify: Added file name back to event path

## [0.6.0] - 2012-06-06

* kqueue: watch files after directory created (thanks @tmc)

## [0.5.1] - 2012-05-22

* [Fix] inotify: remove all watches before Close()

## [0.5.0] - 2012-05-03

* [API] kqueue: return errors during watch instead of sending over channel
* kqueue: match symlink behavior on Linux
* inotify: add `DELETE_SELF` (requested by @taralx)
* [Fix] kqueue: handle EINTR (reported by @robfig)
* [Doc] Godoc example [#1][] (thanks @davecheney)

## [0.4.0] - 2012-03-30

* Go 1 released: build with go tool
* [Feature] Windows support using winfsnotify
* Windows does not have attribute change notifications
* Roll attribute notifications into IsModify

## [0.3.0] - 2012-02-19

* kqueue: add files when watch directory

## [0.2.0] - 2011-12-30

* update to latest Go weekly code

## [0.1.0] - 2011-10-19

* kqueue: add watch on file creation to match inotify
* kqueue: create file event
* inotify: ignore `IN_IGNORED` events
* event String()
* linux: common FileEvent functions
* initial commit

[#79]: https://github.com/howeyc/fsnotify/pull/79
[#77]: https://github.com/howeyc/fsnotify/pull/77
[#72]: https://github.com/howeyc/fsnotify/issues/72
[#71]: https://github.com/howeyc/fsnotify/issues/71
[#70]: https://github.com/howeyc/fsnotify/issues/70
[#63]: https://github.com/howeyc/fsnotify/issues/63
[#62]: https://github.com/howeyc/fsnotify/issues/62
[#60]: https://github.com/howeyc/fsnotify/issues/60
[#59]: https://github.com/howeyc/fsnotify/issues/59
[#49]: https://github.com/howeyc/fsnotify/issues/49
[#45]: https://github.com/howeyc/fsnotify/issues/45
[#40]: https://github.com/howeyc/fsnotify/issues/40
[#36]: https://github.com/howeyc/fsnotify/issues/36
[#33]: https://github.com/howeyc/fsnotify/issues/33
[#29]: https://github.com/howeyc/fsnotify/issues/29
[#25]: https://github.com/howeyc/fsnotify/issues/25
[#24]: https://github.com/howeyc/fsnotify/issues/24
[#21]: https://github.com/howeyc/fsnotify/issues/21