Using Python inside Makefile

Makefile

# Black magic to use Python logic for setting Makefile variables
# Real world example that is detecting AppEngine SDK with Python

# Helper code to detect SDK location
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
# /Helper

SDK_PATH ?= $(shell python -c '$(DETECT_SDK)')

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