ESP-IDF compilation fails on Mac due to pyparsing version

[maxgerhardt]

As reported per community topic.

It seems that although this code

platform-espressif32/builder/frameworks/espidf.py

Lines 78 to 83 in 4cb0633

	env.Execute(
	env.VerboseAction(
	'$PYTHONEXE -m pip install "cryptography>=2.1.4" "future>=0.15.2" "pyparsing>=2.0.3,<2.4.0" ',
	"Installing ESP-IDF's Python dependencies",
	)
	)

is supposed to install pyparsing less than 2.4.0, the affected user still somehow got pyparsing 2.4.7 on his system.

This leads, as discussed in here, to an internal error in the ESP-IDF build system when the linker script is generated.

linker script generation failed for /<user>/.platformio/packages/framework-espidf/components/esp32/ld/esp32.project.ld.in
ERROR: failed to parse /<user>/.platformio/packages/framework-espidf/components/esp_event/linker.lf
Expected end of text, found 'i'  (at char 0), (line:1, col:1)
*** [.pio/build/esp32dev/esp32.project.ld] Error 1

The error is solvable by telling PlatformIO's Python executable to pip uninstall pyparsing and reinstall a known good version, 2.2.0.

It should be investigated why it was possible that the user got a wrong pyparsing version in PlatformIO's isolated Python environment. Possibly other builder scripts for other frameworks / platforms install a higher version?

[maxgerhardt]

Yet another person has run into this issue in our community forum here.