make POSIX sh compliant

bin/espdev

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+if [ $1 = "source" ]; then
+  echo "sourcing and exiting..."
+. $HOME/esp/esp-idf/export.sh
+  exit
+fi
+
+. $HOME/esp/esp-idf/export.sh
+echo "cleaning up..."
+idf.py fullclean
+echo "done cleaning."
+echo "building..."
+idf.py build
+echo "done building."
+echo "flashing..."
+idf.py -p /dev/ttyACM0 flash
+echo "done flashing."
+read -n 1 input -p "monitor serial output? [y/n]"
+if [ $input = y ]; then
+  echo "monitoring..."
+  idf.py -p /dev/ttyACM0 monitor
+else if [ $input = n ]; then
+  exit
+else
+  echo "yes or no dude..."
+fi