Remove bin/ directory in favour of an add_path.sh script that can be sourced

Remaining file in bin/ will be moved out as part of !34

add_path.sh

@@ -0,0 +1,17 @@
+# This shell snippet appends useful esp-idf tools to your PATH environment
+# variable. This means you can run esp-idf tools without needing to give the
+# full path.
+#
+# Use this script like this:
+#
+# source ${IDF_PATH}/add_path.sh
+#
+if [ -z ${IDF_PATH} ]; then
+	echo "IDF_PATH must be set before including this script."
+else
+	IDF_ADD_PATHS_EXTRAS="${IDF_PATH}/components/esptool_py/:${IDF_PATH}/components/partition_table/"
+	export PATH="${PATH}:${IDF_ADD_PATHS_EXTRAS}"
+	echo "Added to PATH: ${IDF_ADD_PATHS_EXTRAS}"
+fi
+
+

components/esptool_py/Makefile.projbuild

@@ -9,7 +9,7 @@ PYTHON ?= $(call dequote,$(CONFIG_PYTHON))
 # to invoke esptool.py (with or without serial port args)
 #
 # NB: esptool.py lives in the sdk/bin directory not the component directory
-ESPTOOLPY := $(PYTHON) $(IDF_PATH)/bin/esptool.py --chip esp32
+ESPTOOLPY := $(PYTHON) $(IDF_PATH)/components/esptool_py/esptool.py --chip esp32
 ESPTOOLPY_SERIAL := $(ESPTOOLPY) --port $(ESPPORT) --baud $(ESPBAUD)
 
 ESPTOOLPY_WRITE_FLASH=$(ESPTOOLPY_SERIAL) write_flash $(if $(CONFIG_ESPTOOLPY_COMPRESSED),-z)

components/partition_table/Makefile.projbuild

@@ -9,7 +9,7 @@
 .PHONY: partition_table partition_table-flash partition_table-clean
 
 # NB: gen_esp32part.py lives in the sdk/bin/ dir not component dir
-GEN_ESP32PART := $(PYTHON) $(IDF_PATH)/bin/gen_esp32part.py -q
+GEN_ESP32PART := $(PYTHON) $(COMPONENT_PATH)/gen_esp32part.py -q
 
 # Path to partition CSV file is relative to project path for custom
 # partition CSV files, but relative to component dir otherwise.$