Use IDF_PATH instead of SDK_PATH for the environment variable pointing to esp-idf

This will require a matching change in all projects using ESP-IDF.

components/bootloader/src/Makefile

@@ -9,4 +9,4 @@ COMPONENTS := esptool_py
 #We cannot include the esp32 component directly but we need its includes. This is fixed by
 #adding it in the main/Makefile directory.
 
-include $(SDK_PATH)/make/project.mk
+include $(IDF_PATH)/make/project.mk

components/bootloader/src/main/Makefile

@@ -1,13 +1,13 @@
 #
 # Main Makefile. This is basically the same as a component makefile.
 #
-# This Makefile should, at the very least, just include $(SDK_PATH)/make/component.mk. By default, 
+# This Makefile should, at the very least, just include $(IDF_PATH)/make/component.mk. By default, 
 # this will take the sources in the src/ directory, compile them and link them into 
 # lib(subdirectory_name).a in the build directory. This behaviour is entirely configurable,
 # please read the esp-idf build system document if you need to do this.
 #
 
-COMPONENT_ADD_LDFLAGS := -L $(abspath .) -lmain -T eagle.bootloader.ld -T $(SDK_PATH)/components/esp32/ld/eagle.fpga32.rom.addr.v7.ld 
-COMPONENT_EXTRA_INCLUDES := $(SDK_PATH)/components/esp32/include 
+COMPONENT_ADD_LDFLAGS := -L $(abspath .) -lmain -T eagle.bootloader.ld -T $(IDF_PATH)/components/esp32/ld/eagle.fpga32.rom.addr.v7.ld 
+COMPONENT_EXTRA_INCLUDES := $(IDF_PATH)/components/esp32/include 
 
-include $(SDK_PATH)/make/component.mk
+include $(IDF_PATH)/make/component.mk

components/esp32/Makefile

@@ -1,23 +1,23 @@
 #
 # Component Makefile
 #
-# This Makefile should, at the very least, just include $(SDK_PATH)/make/component.mk. By default, 
+# This Makefile should, at the very least, just include $(IDF_PATH)/make/component.mk. By default, 
 # this will take the sources in this directory, compile them and link them into 
 # lib(subdirectory_name).a in the build directory. This behaviour is entirely configurable,
-# please read the SDK documents if you need to do this.
+# please read the esp-idf build system document if you need to do this.
 #
 
 LIBS := crypto core net80211 phy rtc pp wpa wps
-                           
+
 COMPONENT_ADD_LDFLAGS := -lesp32 \
                            $(abspath libhal.a) \
                            -L$(abspath lib) \
                            $(addprefix -l,$(LIBS)) \
                           -L $(abspath ld) \
                           -T eagle.fpga32.v7.ld \
-                          -T eagle.fpga32.rom.addr.v7.ld 
+                          -T eagle.fpga32.rom.addr.v7.ld
 
-include $(SDK_PATH)/make/component.mk
+include $(IDF_PATH)/make/component.mk
 
 ALL_LIB_FILES := $(patsubst %,$(COMPONENT_PATH)/lib/lib%.a,$(LIBS))
 
@@ -25,10 +25,10 @@ ALL_LIB_FILES := $(patsubst %,$(COMPONENT_PATH)/lib/lib%.a,$(LIBS))
 # be invoked if any modules are missing (probably because
 # git submodule update --init needs to be run).
 $(ALL_LIB_FILES):
-	$(Q) [ -d ${SDK_PATH}/.git ] || ( @echo "ERROR: Missing libraries in esp32 component. esp-idf must be cloned from git to work."; exit 1 )
+	$(Q) [ -d ${IDF_PATH}/.git ] || ( @echo "ERROR: Missing libraries in esp32 component. esp-idf must be cloned from git to work."; exit 1 )
 	$(Q) [ -x $(which git) ] || ( @echo "ERROR: Missing libraries in esp32 component. Need to run 'git submodule update --init' in esp-idf root directory."; exit 1 )
 	@echo "Warning: Missing libraries in components/esp32/lib/ submodule. Going to try running 'git submodule update --init' in esp-idf root directory..."
-	cd ${SDK_PATH} && git submodule update --init
+	cd ${IDF_PATH} && git submodule update --init
 
 # adding $(ALL_LIB_FILES) as a build dependency here is a hack to make
 # sure they get evaluated. Once TW6630 lands and we have library file

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) $(SDK_PATH)/bin/esptool.py --chip esp32
+ESPTOOLPY := $(PYTHON) $(IDF_PATH)/bin/esptool.py --chip esp32
 ESPTOOLPY_SERIAL := $(ESPTOOLPY) --port $(ESPPORT) --baud $(ESPBAUD)
 
 APP_FLASH_COMMAND=$(ESPTOOLPY_SERIAL) write_flash $(CONFIG_APP_OFFSET) $(APP_BIN)

components/freertos/Makefile

@@ -5,4 +5,4 @@
 COMPONENT_ADD_INCLUDEDIRS := include
 COMPONENT_PRIV_INCLUDEDIRS := include/freertos
 
-include $(SDK_PATH)/make/component.mk
+include $(IDF_PATH)/make/component.mk

components/lwip/Makefile

@@ -8,4 +8,4 @@ COMPONENT_SRCDIRS := api apps core/ipv4 core/ipv6 core netif port/freertos port/
 
 EXTRA_CFLAGS := -Wno-error=address -Waddress -DLWIP_ESP8266
 
-include $(SDK_PATH)/make/component.mk
+include $(IDF_PATH)/make/component.mk

components/newlib/Makefile

@@ -5,4 +5,4 @@ define COMPONENT_BUILDRECIPE
 	#Nothing to do; this does not generate a library.
 endef
 
-include $(SDK_PATH)/make/component.mk
+include $(IDF_PATH)/make/component.mk

components/nvs_flash/Makefile

@@ -6,4 +6,4 @@ COMPONENT_ADD_INCLUDEDIRS := include
 
 COMPONENT_SRCDIRS := src
 
-include $(SDK_PATH)/make/component.mk
+include $(IDF_PATH)/make/component.mk

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) $(SDK_PATH)/bin/gen_esp32part.py -q
+GEN_ESP32PART := $(PYTHON) $(IDF_PATH)/bin/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.$

components/spi_flash/Makefile

@@ -1,3 +1,3 @@
 COMPONENT_ADD_INCLUDEDIRS := include
 
-include $(SDK_PATH)/make/component.mk
+include $(IDF_PATH)/make/component.mk

components/tcpip_adapter/Makefile

@@ -4,4 +4,4 @@
 
 EXTRA_CFLAGS := -DLWIP_ESP8266
 
-include $(SDK_PATH)/make/component.mk
+include $(IDF_PATH)/make/component.mk