Feature: OnNewLogFile Method Hook / Event Handler

[Brondahl]

See this StackOverflow question:

https://stackoverflow.com/questions/60335551/nlog-onnewlogfile-handler

On the assumption that it doesn't currently exist, would you be open to adding such a config option?

NLog version: vNext?

Platform: N/A

Current NLog config: N/A?

• Why do we need it?
  So that (if desired) you can ensure that All log files contain relevant contextual information. Aiding in debugging production issues.

• An example of the XML config, if relevant.
  IDK.
  Possibly something very similar to the MethodCall target functionality?

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[Brondahl]

Supposing you were on board with the concept, would you welcome a PR for this, from a new contributor?

[304NotModified]

I doubting if this really suitable for NLog Core. Another option is to make the File target extensible enough to handle this.

Possibly something very similar to the MethodCall target functionality?

I think c# events are a better way for this

[304NotModified]

related #1249

[snakefoot]

Sounds like you are really looking for the Header-Layout on the FileTarget.

    <target name="logfile" xsi:type="File">
             <header>--- ${assembly-version} started on ${longdate} ---</header>
    </target>

See also https://github.com/NLog/NLog/wiki/File-target

[Brondahl]

🤣 Yes. Yes, it does indeed.
Internet points have been award on SO.

[snakefoot]

Some combine it with archiveOldFileOnStartup because the Header is only printed when file is created (ensure application restarts will create new file). See also #2119

[304NotModified]

Closing this as the header layout is fine here and no upvotes