[Buildroot] [PATCH 2/8] core/pkg-utils: add a macro to pretty-print a help entry

[Yann E. MORIN <yann.morin.1998@free.fr>]

Arnout, All,

On 2016-03-10 00:37 +0100, Arnout Vandecappelle spake thusly:
> On 03/09/16 23:22, Yann E. MORIN wrote:
> >To ensure that all the help entries we display are all formatted the
> >same, we currently indent the help texts manually.
> >
> >Also, when a br2-external tree wants to display local custom help, they
> >have to rely on a hard-coded layout (if they want to match our iwn
> >output, which is not mandatory).
> >
> >Add a macro to pretty-print make rules in the help texts.
> >
> >Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
> >Cc: J?r?me Pouiller <jezz@sysmic.org>
> >Cc: Arnout Vandecappelle <arnout@mind.be>
> >Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> >---
> >  package/pkg-utils.mk | 13 +++++++++++++
> >  1 file changed, 13 insertions(+)
> >
> >diff --git a/package/pkg-utils.mk b/package/pkg-utils.mk
> >index f88313a..873dbec 100644
> >--- a/package/pkg-utils.mk
> >+++ b/package/pkg-utils.mk
> >@@ -104,6 +104,19 @@ define sep
> >
> >  endef
> >
> >+# Pretty-print a make rule in the help text
> >+#
> >+# $(1): a list of double- or single-quoted string representing the rule
> >+#       and their help text, formatted as:  "action : help for action"
> >+#       'action' should be less than 22 characters, otherwise the help
> >+#       text will not be correctly indented.
> >+#
> >+define HELP_RULE
> 
>  Most of our functions are lowercase. Perhaps print-help?

Done, thanks! :-)

>  If we don't have the help-local indirection but directly do it in the
> top-level help, then there's no need for an additional function.

Well... You know what I think about mixing both help.. ;-] So this is a
function so that it can be used by help-custom  (hint, that's the new
name I have for it here! ;-) ).

Regards,
Yann E. MORIN.

>  Regards,
>  Arnout
> 
> >+	for h in $(1); do \
> >+		printf "  %-22s - %s\n" "$${h%% : *}" "$${h#* : }"; \
> >+	done
> >+endef
> >+
> >  # check-deprecated-variable -- throw an error on deprecated variables
> >  # example:
> >  #   $(eval $(call check-deprecated-variable,FOO_MAKE_OPT,FOO_MAKE_OPTS))
> >
> 
> 
> -- 
> Arnout Vandecappelle                          arnout at mind be
> Senior Embedded Software Architect            +32-16-286500
> Essensium/Mind                                http://www.mind.be
> G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
> LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
> GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

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