Is there a way to get that 
sweet Motorola chop-chop flashlight gesture 
on Lineage OS or another custom ROM without installing some random sketchy app? 
It's the only feature I'd miss if I finally switched to a custom ROM from the stock one on my phone, which got its last security patch almost exactly one year ago! 
@Linux_in_a_Bit it's usually there in gestures I guess. You have to flash the ROM and then check
Follow
@sachinsaini
I've had three Motorola phones with LineageOS, and all three times I had chop-chop without sketchy apps.
@Linux_in_a_Bit
@Parienve @Linux_in_a_Bit I have Motorola phones also. That's why told you chop chop is a maintainer specific
@sachinsaini
BTW, Motorola seems to have a patent on this feature until *2035*: https://patents.google.com/patent/US9715283B2/en
@Linux_in_a_Bit
An electronic device includes one or more processors, a motion detector, another motion detector, such as a gyroscope or one or more accelerometers, and one or more proximity detectors. An amount of movement of the electronic device, an amount of rotation about an axis, and whether an object is proximately located with a major face of the electronic device can be determined. A gesture lifting the electronic device occurring can be confirmed when the amount of movement exceeds a first predetermined threshold, the amount of rotation exceeds a second predetermined threshold, and the object is proximately located with the electronic device. Other factors, such as whether the motion was against a gravity direction and a final orientation of the electronic device can be considered as well. A control operation can occur in response to confirming the gesture.
patents.google.com