makefile uses an embedded python script to populate a local variable

Makefile

#from https://stackoverflow.com/questions/17125269/embed-python-in-makefile-to-set-make-variables

define NEWLINE


endef

define DETECT_SDK
import os
locations = [
  "../google_appengine",
  "/usr/local/google_appengine",
  "../.locally/google_appengine",
]
for path in locations:
  if os.path.exists(path):
    print(path)
    break
endef

SDK_PATH ?= $(shell echo '$(subst $(NEWLINE),@NEWLINE@,${DETECT_SDK})' | sed 's/@NEWLINE@/\n/g' | python -)

default:
        @echo 'SDK Path Detected: $(SDK_PATH)'