Compgen
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if compgen -G "${PROJECT_DIR}/*.png" > /dev/null; then
echo "pattern exists!"
fi
https://stackoverflow.com/questions/6363441/check-if-a-file-exists-with-a-wildcard-in-a-shell-script
if compgen -G "${PROJECT_DIR}/*.png" > /dev/null; then
echo "pattern exists!"
fi
https://stackoverflow.com/questions/6363441/check-if-a-file-exists-with-a-wildcard-in-a-shell-script