The commit function does not work when you have user.email but no user.name defined

[alistaircarscadden]

Describe the bug
In gitui v0.3.0 the commit function does not allow a commit to be made when the user has a user.email defined and no user.name defined.

It took me a while to discover that there is a difference between user.name being defined as empty (git config user.name "") and it being undefined (as in, git config --list does not show the entry at all).

In the empty case, interestingly enough, git commit does not allow the commit to be made, likewise gitui does not allow it.

In the undefined case, git commit does allow the commit to be made (and I think it shows unknown in that field in later git log or git show calls). This is where the gitui behaviour is different, as gitui does not allow a commit to be made with this message:

 Status   |   Log
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
┌Unstaged Changes [1]──────┌Error──────────────────────────────────────────────────────────┐───────────────────────────┐
│                          │commit failed:                                                 │                           │
│                          │git error:config value 'user.name' was not found; class=Config │                           │
│                          │(7); code=NotFound (-3)                                        │                           │
│                          │                                                               │                           │

Expected behavior
gitui would allow a commit to be made and fill in unknown as git commit does.

[extrawurst]

followup to #74

[extrawurst]

unfortunately #155 had to be rolled back

[extrawurst]

removed good first issue since #155 showed that writing an appropriate unittest for this is by far more complicated than expected

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[extrawurst]

still active: #269

[extrawurst]

@cruessler is this fixed by your PR?

[extrawurst]

@alistaircarscadden @cruessler closing this hoping that #269 actually fixed this. please reopen if this is not the case