Add pi-only JAR createion (#362)

scripts/generatePiImage.sh

@@ -0,0 +1,23 @@
+# We need to look for a JAR with the "-raspi" suffix so we don't accidentally bundle the big jar
+# Not that it really matters, but it'll save us 50 megs or so
+NEW_JAR=$(realpath $(find . -name photonvision\*-raspi.jar))
+sudo apt install unzip zip
+curl -sk https://api.github.com/repos/photonvision/photon-pi-gen/releases/tags/v2021.1.4 | grep "browser_download_url.*zip" | cut -d : -f 2,3 | tr -d '"' | wget -qi -
+FILE_NAME=$(ls | grep image_*.zip)
+unzip $FILE_NAME
+IMAGE_FILE=$(ls | grep *.img)
+TMP=$(mktemp -d)
+LOOP=$(sudo losetup --show -fP "${IMAGE_FILE}")
+sudo mount ${LOOP}p2 $TMP
+pushd .
+cd $TMP/opt/photonvision
+ls
+sudo cp $NEW_JAR photonvision.jar
+popd
+sudo umount ${TMP}
+sudo rmdir ${TMP}
+rm $FILE_NAME
+NEW_IMAGE=$(basename "${NEW_JAR/jar/img}")
+mv $IMAGE_FILE $NEW_IMAGE
+zip -r $(basename "${NEW_JAR/.jar/-image.zip}") $NEW_IMAGE
+rm $NEW_IMAGE