Add info on number of characters in nano for commit message

[rr-it]

This adds information on how to configure the git default editor nano to show information on number of characters for commit messages.

This fixes #305

[linawolf]

Thanks a lot for your contribution! We generally try not to document other projects but TYPO3. So how to use the editor nano is out of context here I fear. There is such a wide variety of Editors and tools ppl can use around Git that we could not possibly cover them all...

[rr-it]

We do document how to use git.
Nano is the default git editor.
After following all documentation, this settings to show the character limit per line in nano is the only undocumented step I needed to create perfect commit messages.

[linawolf]

We are actually working on reducing non-TYPO3 information in this guide. Usually such features are better documented and maintained in other places. See (#255) we could add a helpful link to the nano documentation however.

[DavidBruchmann]

@rr-it Thanks for your contribution!
Like @linawolf said, we're not considering to merge this PR. If you think you can come up with a solution that could find our agreement, please don't hesitate to create another PR.
Thanks!

[DavidBruchmann]

@rr-it we're just discussing your issue and PR, perhaps you can shine a light on something:
Why you think that nano is the default git editor, where you got this information?
We're considering to add a hint based on your work, but we never want to parrot (unimportant or unproven) narratives.

[rr-it]

@DavidBruchmann I get your point. Just looked up how git gets its editor and it is slightly more complicated.

Git uses either the editor defined via $EDITOR or $VISUAL and then falls back to system default editor:
https://github.com/git/git/blob/48d89b51b3bb8a60580c36731b96a7206ce1e5b9/Documentation/gitfaq.txt#L54-L60

On Debian and Ubuntu systems by default $EDITOR and $VISUAL are not set and the systems default editor is nano:

$ update-alternatives --config editor

  Selection    Path                Priority   Status
------------------------------------------------------------
* 0            /bin/nano            40        auto mode
  1            /bin/ed             -100       manual mode
  2            /bin/nano            40        manual mode
  3            /usr/bin/vim.basic   30        manual mode
  4            /usr/bin/vim.tiny    10        manual mode

So to be more specific:
In case someone is developing on a default Debian or Ubuntu system, the default editor used by git is nano.

[DavidBruchmann]

@rr-it Thanks for these data!
@linawolf what's your take on this and also on my proposition above?
Shall we still add the link to the nano documentation?
It might also be possible to link to nano as well as vim documentation.

[linawolf]

@rr-it Could we maybe add a list of links in the infobox with the most common editors vim and nano and how to set line counts there?

[rr-it]

vi/vim:
Shows information on cursor position (= length of line) by default.

nano:
This software is more than 23 years old, last change to the setting constantshow was more than 7 years ago in 2015 (parameter renamed from constant to constantshow).
So in this case I would go for documenting the feature straight away in the TYPO3 Contribution Guide instead of linking to a "never" changing documentation:

For nano find the documentation at https://nano-editor.org/dist/latest/nanorc.5.html and then search for set constantshow to see how to 'constantly display the cursor position in the status bar'.

[linawolf]

@rr-it sounds like a good solution, please go ahead

[linawolf]

No reaction since 2 Month, closing. Please tell us if you want to work on this again

[rr-it]

@linawolf Please reopen. I revised the changes.