Live update config file without restarting (RFC)

[Alexandero89]

So i wanted my instance to run on the server and while the docker container is running I can simply add URLs to the config.yaml that are automatically included in the search without needing to restart the instance.

I don't know if this function is even wanted here, but since its finished and works for me, I thought I would at least offer it.

The following functions are possible with this PR:

• Edit config.yaml and changes are applied live without having to restart the server
• If an error occurs in the edited config file, the change is not applied and the old config is still used.

Steps implemented to achieve these functions:

• checking the correctness of a config has been outsourced to the check_config function
• creation of the heartbeat has been outsourced to the get_heartbeat_instructions function
• A setting "refresh_config: no" was added to config.yaml.dist under the "loop:" tab
• When creating a config object, the timestamp at which the file was last changed on the file system is also saved
• Each time a loop is executed, a check is made to see whether "refresh_config" is true. If so, a new config object is created and compared to see if the timestamps differ from each other
• if the timestamp is more recent, the old config is replaced with the new one and all required objects are reinitialised
• various helper methods and environment variables added
• added readme content for the env variable

If this feature is also useful here, but would have to be adapted before it is merged, I am open to changes.

[codecov]

Codecov Report

❌ Patch coverage is 60.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.75%. Comparing base (73a6229) to head (ab74292).
⚠️ Report is 157 commits behind head on main.

Files with missing lines	Patch %	Lines
flathunter/config.py	60.00%	7 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #535      +/-   ##
==========================================
- Coverage   71.10%   66.75%   -4.36%     
==========================================
  Files          41       41              
  Lines        2274     2292      +18     
  Branches      338      341       +3     
==========================================
- Hits         1617     1530      -87     
- Misses        552      662     +110     
+ Partials      105      100       -5     

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[codders]

Thanks for the pull request. It looks like a cool feature and I would like to merge it in. Just one question about the implementation.

[codders]

Bit confused here. Doesn't setting 'refresh_config' to 'no' here actually enable it?

[Alexandero89]

Why do you think so? I just tested and it is not reloading the config when the value ist set to "no"

[Alexandero89]

I just noticed that my flathunt instance is taking around 4gb of ram after running for a while.
So i think i need to check for a memory leak and if its coming from my code changes or were in the original code.

will keep you updated.