exclude-gitignore does not read .git/info/exclude

[artizirk]

Bug Report

When using exclude-gitignore option then mypy ignores additional ignore rules added to .git/info/exclude

To Reproduce

mkdir test-prj
cd test-prj
git init

echo '*' >> .git/info/exclude

echo 'invalid code' > main.py
mypy --exclude-gitignore .

Expected Behavior

Mypy should respond with

There are no .py[i] files in directory '.'

as all files are excluded.

Actual Behavior

Mypy tries to read main.py

main.py:1: error: Invalid syntax  [syntax]
Found 1 error in 1 file (errors prevented further checking)

Your Environment

• Mypy version used: 1.19.1
• Mypy command-line flags: exclude-gitignore
• Mypy configuration options from mypy.ini (and other config files): none
• Python version used: 3.14.3

[ilevkivskyi]

Mypy only parses content in actual .gitignore files, we never intended to support anything else. If it is not hard however, we may add .git/info/exclude as well.