fswatch | File/Directory Watcher for Modern C | File Utils library
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File/Directory Watcher for Modern C++
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QUESTION
I'm looking to write a script that monitors all files/folders tracked by git to notify me if any of them have been changed. I'm looking for file changes and not necessarily staged changes.
I've been combing through various SO questions and documentations, but I can't find any relevant examples for implementing a file system watcher based off of git that would be efficient, since I might want to implement this across a multitude of repositories and possibly hundreds of files all on one system without being extremely inefficient.
Is git even the right solution for this? Would I be better off using fswatch
even across many, many files?
Many thanks
...ANSWER
Answered 2021-May-31 at 10:08Git itself doesn't watch the file system (*) and as such also doesn't provide any hooks when files change. It only inspects the file system whenever a git command is executed.
Therefore there aren't (and can't be) any hooks that execute on file change. You'll need to find another way to watch the file system, if you need this.
(*) Apparently there is a way to actually use file system monitoring in git, but that only seems to be used to speed up git status
(and other operations) and still doesn't mean that git actively monitors changes. It just replaces "check each file for modification" with "check the list of changed files since the last time for modification".
QUESTION
Need help with arrays in Mongoose. Here is how my schema looks :-
...ANSWER
Answered 2021-Mar-19 at 06:27If you are dealing with Mongoose Documents, not with .lean()
javascript objects, probably, you'll need to mark array field(s) as modified via markModified
and only then use .save()
.
Also,
directModifiedPaths
could help you to check, what fields has been modified in the document.
I have noticed that your Alert_Activities
, is actually an array of objects, so make sure that the result mongoose documents, which you are trying to .save()
really satisfy all the validation rules.
If changes on some fields do successfully saved but the others - don't, then if's definitely something wrong with field names, or validation. And the DB/mongoose doesn't trigger you an error, because the document has already been saved, even in particular.
QUESTION
I'm playing a bit with kibana to see how it works.
i was able to add nginx log data directly from the same server without logstash and it works properly. but using logstash to read log files from a different server doesn't show data. no error.. but no data.
I have custom logs from PM2 that runs some PHP script for me and the format of the messages are:
Timestamp [LogLevel]: msg
example:
...ANSWER
Answered 2021-Feb-24 at 17:19If you have output using both stdout
and elasticsearch
outputs but you do not see the logs in Kibana, you will need to create an index pattern
in Kibana so it can show your data.
After creating an index pattern
for your data, in your case the index pattern
could be something like logstash-*
you will need to configure the Logs app inside Kibana to look for this index, per default the Logs app looks for filebeat-*
index.
QUESTION
I have a simple script to upload the file to dropbox whenever it changes. I wanted to run it at system startup and keep it in a background to let the script watch the file.
I've created a plist, however it runs the script and exits with code 0.
plist
...ANSWER
Answered 2021-Jan-03 at 09:22Edit crontab file with crontab -e
and add the following to that file:
QUESTION
I'm working on a bash script that displays a random ANSI art banner on the top 16 lines of the screen, and then the project view of my todo.txt list in the remaining lines. This is intended to live in one pane of my tmux window, so that the right third of my screen (roughly 80x48 characters) is showing my todo list at all times.
Right now I've got the banner randomizing on load, and then the todo list updates via fswatch whenever I add or remove something. I would also like to update the banner once every 15 minutes or so, so I'd like to use something like watch to run the command to cat a random ANSI banner on a 15 minute interval, but when using watch, the banner portion of the script just blanks out the entire screen. (the code below has a 10 second interval used for testing)
Is there a better way to be doing this, or a way to get watch to start outputting the banners correctly?
Here's the script:
...ANSWER
Answered 2020-Sep-09 at 21:50It would appear that cat won't produce colored output in a format that watch will accept, as watching ls or some other colored output works fine, but nothing involving cat and colored output will do anything other than blank the screen.
My answer involved ditching watch and just combining the scripts, running a bash loop in the background which updates the banner every 60 seconds. Unfortunately the writes to STDOUT are not atomic for either this loop or for the todo list, so I had to simply update variables containing the banner and the list, and update the entire screen every time the list file changes or it's 60 seconds and it's time for a new banner.
This isn't ideal, because I'm redrawing a bunch of stuff that I don't have to redraw, but it's the only way to get around the fact that I can't find a way to make the writes to STDOUT atomic.
QUESTION
I might misunderstand the xargs -I {}
parsed argument of fswatch
. This should return the file path of any new events in my specified directory, correct?
My command below is intended to watch /my/path/to/watch
and trigger my_script.py
when a new event occurs in /my/path/to/watch
. my_script.py
requires the file path associated with the new event, which is what I thought I was passing with {}
.
My command:
...ANSWER
Answered 2020-Jun-19 at 00:21When you are executing a program from your terminal, the first arguments will always be the name of your program, meaning sys.argv[0] will be the name of your script. What you want to use would probably be sys.argv[1], as everything after sys.argv[0] would be the actual parameters passed to the script.
You could look at it like this:
QUESTION
I need to monitor a downloads directory, and keep track of the order in which files were written to the directory. The only way I know this is possible in macos is fswatch
, but the documentation seems quite sparse compared to inotifywatch
on linux.
For example, if 001.jpg
then 003.jpg
then 002.jpg
were downloaded to the directory (in that order), I would need a variable that looks like this: 001.jpg 003.jpg 002.jpg
I only need to monitor new files in this case, not modified files. For example, if 001.jpg
is modified, it should not be moved to the end of the list.
ANSWER
Answered 2019-Jul-13 at 03:16Bash script handle_order.sh
that will maintain order in the track_order
text file
QUESTION
I want to change the owner and permission of the /var/www/html folder every time I add/create or update any new file or directory in this folder.
I thought of using fswatch for this to grab the events that happen in that directory(i.e /var/www/html), with now I am able to get the event of updated/removed every time any change like creating or deleting the file respectively in the directory by the command
...ANSWER
Answered 2018-May-08 at 23:40I'd filter-in for specific events, then pass it by one to xargs
via e.g.:
QUESTION
I have been stuck on a problem recently with trying to create a project view in GTK. The issue is that my program constantly deletes and adds files to a project directory, but to account for these changes, the TreeStore of the project tree view needs to be cleared and repopulated. When the TreeStore is cleared and repopulated, the project TreeView collapses all of its headers. Take the following example:
This is the project view before the program adds another folder named "SubProject2" under MainProject, clears the TreeModel, and repopulates it with the same directory.
This is the project view after:
Note that the folder "SubProject2" was added correctly under "MainProject", but the TreeView collapsed "MainProject".
My current code for repopulating the TreeView is the following:
...ANSWER
Answered 2018-Sep-26 at 03:30The way I solved this problem was by storing expanded rows in a data structure before clearing the TreeView. I used a keyed data list to associate the name of the expanded row and its corresponding depth (row name is key and depth is value). I then clear the TreeView and repopulate it as usual. After, I traverse the TreeModel row by row. If the row name is a key in the keyed datalist and the row has the same depth as the depth value of the keyed datalist, I expand that row. Here is the code:
QUESTION
I have been trying to create an automatically updating git log --graph --no-pager
. I made some strides using fswatch
but I ran into the issue of my git history being actually bigger than my screen can display. I tried adding | head -n $((`tput lines` - 1))
but the output is still overflowing because of line wrapping. I then tried using tput rmam
in order to disable wrapping, but now I can't usually see where HEAD
points to.
Anyone could help me? Ideally, I'd like to remove --no-pager
, but I don't know how to make that work with fswatch
. Here is what I have so far:
ANSWER
Answered 2018-Jan-25 at 20:54I have a less elegant solution than yours but simple: using watch.
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