Git identity panel stuck on in a non-git repo #2435

Prerequisites

• Put an X between the brackets on this line if you have done all of the following:
  • Reproduced the problem in Safe Mode: https://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
  • Followed all applicable steps in the debugging guide: https://flight-manual.atom.io/hacking-atom/sections/debugging/
  • Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
  • Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
  • Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

Description

When Atom is opened with a project root that is not a git repository, the "Git Identity" view is always shown (with empty username and email) even when both are set in the global config.

Steps to Reproduce

1. mkdir -p ~/src/not-git
2. atom ~/src/not-git

Expected behavior:

The "initialize a repo here" pane should be visible.

Actual behavior:

The "Git identity" pane is visible.

Reproduces how often:

100%

Versions

$ atom --version                                                                                                               
Atom    : 1.46.0-nightly7
Electron: 4.2.7
Chrome  : 69.0.3497.128
Node    : 10.11.0
$ apm --version                                                                                                                          
apm  2.4.3
npm  6.2.0
node 10.2.1 x64
atom 1.46.0-nightly7
python 2.7.16
git 2.24.1

Additional Information

My guess is that this is caused by the default implementation of State#getConfig() in non-Present repository states.