Xcode switcher which uses Make as it's interpreter while leveraging xcodebuild and xcode-select

xc

#!/usr/bin/make -f

.DEFAULT_GOAL := main

# eval trick to avoid re-execing variable
SEL = $(eval SEL := $$(shell read sel && echo $$$$sel))$(SEL)

102:
	sudo xcode-select -s /Applications/Xcode-102-10E125.app
	xcodebuild -version

110:
	sudo xcode-select -s /Applications/Xcode-110-11A420a.app
	xcodebuild -version

112:
	sudo xcode-select -s /Applications/Xcode-112-11B52.app
	xcodebuild -version

main: prompt select

prompt:
	@echo "Current $(shell xcodebuild -version)"
	@echo "Xcode version"
	@echo "\t1) 10.2"
	@echo "\t2) 11.0"
	@echo "\t3) 11.2"
	@echo -n 'Selection: '

select:
	@if [ ${SEL} = 1 ]; then\
		$(MAKE) -f xc 102;\
	fi;\
	if [ ${SEL} = 2 ]; then\
		$(MAKE) -f xc 110;\
	fi;\
	if [ ${SEL} = 3 ]; then\
		$(MAKE) -f xc 112;\
	fi