# this makefile holds the most helpful bits for the toplevel one
define help_body
if [ -t 1 ]; then \
echo '** available $(1) targets:'; \
columnize $(2); \
else \
printf '%s\n' $(2); \
fi
endef
help = $(and $(2),$(help_body))
help/distro:
@$(call help,distribution,$(sort $(DISTROS:distro/%=%)))
help/ve:
@[ -n "$(SPACE)" ] && echo; \
$(call help,virtual environment,$(sort $(VES)))
help/vm:
@[ -n "$(SPACE)" ] && echo; \
$(call help,virtual machine,$(sort $(VMS)))
help: SPACE = 1
help: help/distro help/ve help/vm; @:-
Michael Shigorin authored
The __frontend variable was introduced to address the needs of alterator-mkimage module: list the images available in one column, purge the builddir. Looks like we should consider other cases with redirected stdout (cron builds, piped calls, etc) like fundamentally non-interactive and behave the same. So commit 3a8af6b5's description is wrong now; the current cleanup rules are: - if CLEAN=0 or DEBUG>1, don't do it; - if CHECK or REPORT is set, don't do it; - otherwise if at least one of the following conditions is true: + there's more than one target being built in a row; + stdout was redirected (cronjob, alterator-mkimage...); + metaprofile directory is read-only ...then do a distclean. If that doesn't suit your needs, describe the particular situation please. Thanks cas@ for wondering aloud whether greppable output is unsupported with `make help'.
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