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FSMonitor 1.0.5 MAC OS X Monitor changes to the file system. Size: 10.12 MB FSMonitor monitors all changes in the file system. Track all changes to the file system, including file creation, deletion, change of content, renames, and change-of-attributes. Examine the changed files with any of the four provided display modes. 1 2 3 $ watchman watch /src # the single quotes around '.css' are important! $ watchman - trigger /src buildme '.css' - minify-css The output for buildme will land in the Watchman log file unless you send it somewhere else.
- Command Interface. We can enter command interface via the following ways. Excute init 3 with root. Init run at runlevel 3. Hotkey: Ctrl + ALt + F1/2/3/ init. Init is the first process, it commonly locates on /sbin/init, if kernel can’t find init, it will try to run /bin/sh, if the operation fails, the OS will fail to start successfully.
- If your system is using fsmonitor, and that's going wrong, you have a bigger problem and perhaps should disable fsmonitor globally, via git config and the core.fsmonitor setting. 2 This assumes a normal (not -bare ) repository, and that you have not added additional work-trees using git worktree add.
- FSMonitor 1.0.5 MAC OS X Monitor changes to the file system. Size: 10.12 MB FSMonitor monitors all changes in the file system. Track all changes to the file system, including file creation, deletion, change of content, renames, and change-of-attributes. Examine the changed files with any of the four provided display modes.
Released:
Filesystem events monitoring
Project description
Python API and shell utilities to monitor file system events.
Works on Python 2.7 and 3.4+. If you want to use an old version of Python, you should stick with watchdog < 0.10.0.
Example API Usage
A simple program that uses watchdog to monitor directories specifiedas command-line arguments and logs events generated:
Shell Utilities
Watchdog comes with an optional utility script called watchmedo.Please type watchmedo --help at the shell prompt toknow more about this tool.
Here is how you can log the current directory recursivelyfor events related only to *.py and *.txt files whileignoring all directory events:
You can use the shell-command subcommand to execute shell commands inresponse to events:
Please see the help information for these commands by typing:
About watchmedo Tricks
watchmedo can read tricks.yaml files and execute tricks within them inresponse to file system events. Tricks are actually event handlers thatsubclass watchdog.tricks.Trick and are written by plugin authors. Trickclasses are augmented with a few additional features that regular event handlersdon’t need.
Fsmonitor 1 123 Drive
An example tricks.yaml file:
The directory containing the tricks.yaml file will be monitored. Each trickclass is initialized with its corresponding keys in the tricks.yaml file asarguments and events are fed to an instance of this class as they arrive.
Tricks will be included in the 0.5.0 release. I need community input about them.Please file enhancement requests at the issue tracker.
Installation
Install from PyPI using pip:
Install from source:
Installation Caveats
The watchmedo script depends on PyYAML which links with LibYAML,which brings a performance boost to the PyYAML parser. However, installingLibYAML is optional but recommended. On Mac OS X, you can use homebrewto install LibYAML:
On Linux, use your favorite package manager to install LibYAML. Here’s how youdo it on Ubuntu:
On Windows, please install PyYAML using the binaries they provide.
Documentation
You can browse the latest release documentation online.
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Contribute
Fork the repository on GitHub and send a pull request, or file an issueticket at the issue tracker. For general help and questions use the officialmailing list or ask on stackoverflow with tag python-watchdog.
Create and activate your virtual environment, then:
If you are making a substantial change, add an entry to the “Unreleased” sectionof the changelog.
Supported Platforms
- Linux 2.6 (inotify)
- Mac OS X (FSEvents, kqueue)
- FreeBSD/BSD (kqueue)
- Windows (ReadDirectoryChangesW with I/O completion ports;ReadDirectoryChangesW worker threads)
- OS-independent (polling the disk for directory snapshots and comparing themperiodically; slow and not recommended)
Note that when using watchdog with kqueue, you need thenumber of file descriptors allowed to be opened by programsrunning on your system to be increased to more than thenumber of files that you will be monitoring. The easiest wayto do that is to edit your ~/.profile file and adda line similar to:
This is an inherent problem with kqueue because it usesfile descriptors to monitor files. That plus the enormousamount of bookkeeping that watchdog needs to do in orderto monitor file descriptors just makes this a painful wayto monitor files and directories. In essence, kqueue isnot a very scalable way to monitor a deeply nesteddirectory of files and directories with a large number offiles.
About using watchdog with editors like Vim
Vim does not modify files unless directed to do so.It creates backup files and then swaps them in to replacethe files you are editing on the disk. This means thatif you use Vim to edit your files, the on-modified eventsfor those files will not be triggered by watchdog.You may need to configure Vim appropriately to disablethis feature.
About using watchdog with CIFS
When you want to watch changes in CIFS, you need to explicitly tell watchdog touse PollingObserver, that is, instead of letting watchdog decide anappropriate observer like in the example above, do:
Dependencies
- Python 2.7, 3.4 or above.
- XCode (only on Mac OS X)
- PyYAML (only for watchmedo script)
- argh (only for watchmedo script)
Licensing
Watchdog is licensed under the terms of the Apache License, version 2.0.
Copyright 2011 Yesudeep Mangalapilly.
Copyright 2012 Google, Inc.
Project source code is available at Github. Please report bugs and fileenhancement requests at the issue tracker.
Why Watchdog?
Too many people tried to do the same thing and none did what I needed Pythonto do:
Changelog
0.10.3
2020-0x-xx • full history
- Ensure ObservedWatch.path is a string (#651)
- [inotify] Allow to monitor single file (#655)
- [inotify] Prevent raising an exception when a file in a monitored folder has no permissions (#669, #670)
- Thanks to our beloved contributors: @brant-ruan, @rec, @andfoy, @BoboTiG
0.10.2
2020-02-08 • full history
- Fixed the build_ext command on macOS Catalina (#628)
- Fixed the installation of macOS requirements on non-macOS OSes (#635)
- Refactored dispatch() method of FileSystemEventHandler,PatternMatchingEventHandler and RegexMatchingEventHandler
- [bsd] Improved tests support on non Windows/Linux platforms (#633, #639)
- [bsd] Added FreeBSD CI support (#532)
- [bsd] Restored full support (#638, #641)
- Thanks to our beloved contributors: @BoboTiG, @evilham, @danilobellini
0.10.1
2020-01-30 • full history
- Fixed Python 2.7 to 3.6 installation when the OS locale is set to POSIX (#615)
- Fixed the build_ext command on macOS (#618, #620)
- Moved requirements to setup.cfg (#617)
- [mac] Removed old C code for Python 2.5 in the fsevents C implementation
- [snapshot] Added EmptyDirectorySnapshot (#613)
- Thanks to our beloved contributors: @Ajordat, @tehkirill, @BoboTiG
0.10.0
2020-01-26 • full history
Breaking Changes
- Dropped support for Python 2.6, 3.2 and 3.3
- Emitters that failed to start are now removed
- [snapshot] Removed the deprecated walker_callback argument,use stat instead
- [watchmedo] The utility is no more installed by default but via the extrawatchdog[watchmedo]
Other Changes
- Fixed several Python 3 warnings
- Identify synthesized events with is_synthetic attribute (#369)
- Use os.scandir() to improve memory usage (#503)
- [bsd] Fixed flavors of FreeBSD detection (#529)
- [bsd] Skip unprocessable socket files (#509)
- [inotify] Fixed events containing non-ASCII characters (#516)
- [inotify] Fixed the way OSError are re-raised (#377)
- [inotify] Fixed wrong source path after renaming a top level folder (#515)
- [inotify] Removed delay from non-move events (#477)
- [mac] Fixed a bug when calling FSEventsEmitter.stop() twice (#466)
- [mac] Support for unscheduling deleted watch (#541)
- [mac] Fixed missing field initializers and unused parameters inwatchdog_fsevents.c
- [snapshot] Don’t walk directories without read permissions (#408)
- [snapshot] Fixed a race condition crash when a directory is swapped for a file (#513)
- [snasphot] Fixed an AttributeError about forgotten path_for_inode attr (#436)
- [snasphot] Added the ignore_device=False parameter to the ctor (597)
- [watchmedo] Fixed the path separator used (#478)
- [watchmedo] Fixed the use of yaml.load() for yaml.safe_load() (#453)
- [watchmedo] Handle all available signals (#549)
- [watchmedo] Added the --debug-force-polling argument (#404)
- [windows] Fixed issues when the observed directory is deleted (#570 and #601)
- [windows] WindowsApiEmitter made easier to subclass (#344)
- [windows] Use separate ctypes DLL instances
- [windows] Generate sub created events only if recursive=True (#454)
- Thanks to our beloved contributors: @BoboTiG, @LKleinNux, @rrzaripov,@wildmichael, @TauPan, @segevfiner, @petrblahos, @QuantumEnergyE,@jeffwidman, @kapsh, @nickoala, @petrblahos, @julianolf, @tonybaloney,@mbakiev, @pR0Ps, javaguirre, @skurfer, @exarkun, @joshuaskelly,@danilobellini, @Ajordat
0.9.0
Fsmonitor 1 123 Movies
2018-08-28 • full history
- Deleting the observed directory now emits a DirDeletedEvent event
- [bsd] Improved the platform detection (#378)
- [inotify] Fixed a crash when the root directory being watched by was deleted (#374)
- [inotify] Handle systems providing uClibc
- [linux] Fixed a possible DirDeletedEvent duplication whendeleting a directory
- [mac] Fixed unicode path handling fsevents2.py (#298)
- [watchmedo] Added the --debug-force-polling argument (#336)
- [windows] Fixed the FILE_LIST_DIRECTORY constant (#376)
- Thanks to our beloved contributors: @vulpeszerda, @hpk42, @tamland, @senden9,@gorakhargosh, @nolsto, @mafrosis, @DonyorM, @anthrotype, @danilobellini,@pierregr, @ShinNoNoir, @adrpar, @gforcada, @pR0Ps, @yegorich, @dhke
0.8.3
2015-02-11 • full history
- Fixed the use of the root logger (#274)
- [inotify] Refactored libc loading and improved error handling ininotify_c.py
- [inotify] Fixed a possible unbound local error in inotify_c.py
- Thanks to our beloved contributors: @mmorearty, @tamland, @tony,@gorakhargosh
0.8.2
2014-10-29 • full history
- Event emitters are no longer started on schedule if Observer is notalready running
- [mac] Fixed usued arguments to pass clang compilation (#265)
- [snapshot] Fixed a possible race condition crash on directory deletion (#281)
- [windows] Fixed an error when watching the same folder again (#270)
- Thanks to our beloved contributors: @tamland, @apetrone, @Falldog,@theospears
0.8.1
2014-07-28 • full history
![Fsmonitor 1 123 movies Fsmonitor 1 123 movies](https://www.craftinginterpreters.com/image/a-virtual-machine/stack-crepe.png)
- Fixed anon_inode descriptors leakage (#249)
- [inotify] Fixed thread stop dead lock (#250)
- Thanks to our beloved contributors: @Witos, @adiroiban, @tamland
0.8.0
2014-07-02 • full history
- Fixed argh deprecation warnings (#242)
- [snapshot] Methods returning internal stats info were replaced bymtime(), inode() and path() methods
- [snapshot] Deprecated the walker_callback argument
- [watchmedo] Fixed auto-restart to terminate all children processes (#225)
- [watchmedo] Added the --no-parallel argument (#227)
- [windows] Fixed the value of INVALID_HANDLE_VALUE (#123)
- [windows] Fixed octal usages to work with Python 3 as well (#223)
- Thanks to our beloved contributors: @tamland, @Ormod, @berdario, @cro,@BernieSumption, @pypingou, @gotcha, @tommorris, @frewsxcv
Release historyRelease notifications | RSS feed
0.10.3
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0.10.1
0.10.0
0.9.0
0.8.3
0.8.2
0.8.1
0.8.0
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0.6.0
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Lately, I’ve been working on a code-base situated remotely on a server accessible over
ssh
.The network latency and size of the code repository prompted me to reconsider the methodto edit such files. I discovered a few options I could use and finally settled with one of them.Option I : Running Emacs remotely.
This was the option I initially started with. Since most of the people who worked around meused
vim
, remotely, this option came naturally to me.Since, the remote machine was a Linux system, I built Emacson the server and started using it.Since most of my keyboard shortcuts, in Emacs, are some fancy combinations of Ctrl, Meta and character keys,the terminal software I used, ate most of such shortcuts.I tried resetting the terminal keybindings and changed some complex keybindings but in the end, I had to give up on that.
Changing my keybindings to make them a little saner for my terminal emulator, did not seem like an option.Since, rewiring my brain to create new muscle memory built over 2 years was my last option.
Option II: Using Tramp
Emacs has an inbuilt option to connect to remote hosts (via several protocols) called Tramp.Initially it felt (a lot) easier than the ‘running emacs remotely’ option, but slowlythe problems with tramp started to appear.
Tramp was a bit sluggish when opening and saving files. There were some optimizations that could be donewith tramp settings
and some ssh settings.
Even though, these did improve the performance by a large factor, it’s performance on large files and slow networkconnections, was still a little below usable.
Apart from this, I had problems running a few Emacs packages such as flycheck.
Option III: Mounting Remote file system locally
One of the options I found was mounting a remote file system locally via sshfs.It did have a few problems with connection stability, but it worked fine overall.
I solved a few problems with some optimizations via command-line parameters. The final command looked somewhat like this.
This increased the overall speed and removed sluggishness while editing.
The problem with sshfs is it’s speed. Any operation requiring a disk scan was unbearably slow.So I couldn’t run commands like
locate
, grep
, and magit
via Emacs.Projectile was usable after
(setq projectile-enable-caching t)
though.I found a small utility which addressed this problem.It works by executing all commands which ran inside a directory mounted on sshfs on the remote host directly.So, heavy disk operations become very fast as the remote server is doing all the heavy lifting.
To run any command such as
git
directly on remote all I had to do wasYou can check this by running
git --version
from inside and outside the sshfs mount.The combination of
sshfs
and sshfsexec
solved almost all the problems I faced with earlier setups.It was almost always faster than tramp when opening and saving of files, and almost as fast as tramp when doingdisk operations such as opening Magit.The only problem here was the availability of code when offline. And even though this method was fast, it wasnot as fast as a project opened locally. These problems bring us to the fourth option.
Option IV: Keeping local copy in sync
This is the approach that some of the IDE’s take. The code is mirrored locally and the remote code is kept in syncwith the local copy.
There are two parts to this. Firstly, there should be a syncing utility which does the job of transferring thechanges of the file to the remote copy. The second part of it is the file change notifier which will alert the syncingutility to start syncing.
Initially, I started with running
rsync
in the after-save-hook
hook of emacs. It worked kind of fine, but the problem waswith the changes made outside the scope of Emacs, such as changing of a git branch. It also restricted me from makingany changes on the remote code directly since there was no mechanism to automatically download the remote copy changesto the local copy.On looking a bit further, I came across Unison. It supported two way syncing alongwith file watch facility. It is required that same version Unison is installed on both local and remote machines.Following are the steps that will setup Unison.
Repeat these same steps on the server.It is preferable to remove
.git
folder from syncing. This can be done by creating/editing a ~/.unison/default.prf
and addingYou should also remove other build/libraries directories that you won’t be editing. This will decreasethe amount of files it has (and memory it takes in the process) to look for changes.
You can now start the sync by
This will keep on looking for changes in the local copy and sync the remote every time there’s one.
In the case when a sync is required from the remote to local
can be used.
In case of errors such as
Errno=No space left on device (ENOSPC)
, the inotify memory can be increasedby setting sudo sysctl fs.inotify.max_user_watches=20480
. This memory useskernel memory spaceand is not swappable. Therefore, this shouldn’t be increased too much if you don’t have sufficient RAM.I initially used
sshfs
method for a long time along with tramp
for most of my work,but recently have switched to maintaining a local copy of the codebase.Concluding
The choice of the method completely depends on what the purpose of editing is.
For a quick change in a server I always prefer
tramp
. In the case when I’m doing some sysadmin work,I prefer installing Emacs on the server and using emacsclient
to open and edit files quickly.When working on code, unless it’s not fairly large repository, I prefer sshfs
.Since the current scenario requires me to work on a large codebase where sshfs (kind of) breaksI keep everything copied locally and in sync with the server.