[jackhill/mal.git] / make / readline.mk

#
# mal (Make Lisp) shell readline wrapper
#

ifndef __mal_readline_included
__mal_readline_included := true

# Call bash read/readline. Since each call is in a separate shell
# instance we need to restore and save after each call in order to
# have readline history.
READLINE_EOF :=
READLINE_HISTORY_FILE := $${HOME}/.mal-history
READLINE = $(eval __readline_temp := $(shell \
 history -r $(READLINE_HISTORY_FILE); \
 read -u 0 -r -e -p $(if $(1),$(1),"user> ") line && \
 history -s -- "$${line}" && \
 echo "$${line}" || \
 echo "__||EOF||__"; \
 history -a $(READLINE_HISTORY_FILE) 2>/dev/null || \
 true \
))$(if $(filter __||EOF||__,$(__readline_temp)),$(eval READLINE_EOF := yes),$(__readline_temp))

endif
Commit	Line	Data
31690700 JM	1	#
	2	# mal (Make Lisp) shell readline wrapper
	3	#
	4
	5	ifndef __mal_readline_included
	6	__mal_readline_included := true
	7
	8	# Call bash read/readline. Since each call is in a separate shell
	9	# instance we need to restore and save after each call in order to
	10	# have readline history.
	11	READLINE_EOF :=
	12	READLINE_HISTORY_FILE := $${HOME}/.mal-history
23100ede NB	13	READLINE = $(eval __readline_temp := $(shell \
	14	history -r $(READLINE_HISTORY_FILE); \
	15	read -u 0 -r -e -p $(if $(1),$(1),"user> ") line && \
	16	history -s -- "$${line}" && \
	17	echo "$${line}" \|\| \
	18	echo "__\|\|EOF\|\|__"; \
	19	history -a $(READLINE_HISTORY_FILE) 2>/dev/null \|\| \
	20	true \
	21	))$(if $(filter __\|\|EOF\|\|__,$(__readline_temp)),$(eval READLINE_EOF := yes),$(__readline_temp))
31690700 JM	22
31690700 JM	23	endif