scripts: Make sure setup.sh is run from correct folder.

Fix the hw_test.sh script for new cmdline syntax.

scripts/misc/hw_test.sh

@@ -6,8 +6,8 @@
 dd if=/dev/urandom of=a.adf bs=512 count=1760
 disk-analyse -e 2 a.adf b.adf
 disk-analyse a.adf a.scp
-./gw write --ecyl=2 a.scp
-./gw read --revs=1 --ecyl=2 b.scp
+./gw write --tracks=c=0-2 a.scp
+./gw read --revs=1 --tracks=c=0-2 b.scp
 disk-analyse -e 2 b.scp c.adf
 diff b.adf c.adf
 md5sum b.adf c.adf

scripts/setup.sh

@@ -1,4 +1,9 @@
 #!/bin/bash
 PYTHON="${PYTHON:-python3}"
+if [ ! -d ./scripts/c_ext ]; then
+    echo "** Please run setup.sh from within the Greaseweazle folder";
+    echo "** eg: ./scripts/setup.sh";
+    exit 1;
+fi ;
 $PYTHON -m pip install --user bitarray crcmod pyserial
 (cd ./scripts/c_ext && $PYTHON setup.py install --install-platlib=../greaseweazle/optimised)