Makefile with dynamic jobs (separate job for each subdir). Great for monorepo

Makefile

SUBDIRS := $(wildcard fe-*)
PROXIED_COMPOSER_COMMANDS := install build lint test
MAKEFLAGS := --jobs=$(words $(SUBDIRS))

define make-composer-dot-rules

$1.$2::
	cd $1 && composer $2
endef

define make-composer-rules

$1:: $(addsuffix .$1, $(SUBDIRS))
endef

outer-loop = $(foreach $i,$1,$(call inner-loop,$($i),$2))
inner-loop = $(foreach $i,$2,$(call make-composer-dot-rules,$1,$($i)))

# define rules for eg. make fe-bl-service.install
$(foreach SUBDIR,$(SUBDIRS),$(eval $(call outer-loop,$(SUBDIRS),$(PROXIED_COMPOSER_COMMANDS))))
# define rules for eg. make install
$(foreach COMMAND,$(PROXIED_COMPOSER_COMMANDS),$(eval $(call make-composer-rules,$(COMMAND))))