Re: [PATCH] Makefile: Add help target

[Andreas Ericsson <ae@op5.se>]

On 09/28/2010 01:37 PM, Sverre Rabbelier wrote:
> Heya,
> 
> On Tue, Sep 28, 2010 at 11:45, Junio C Hamano<gitster@pobox.com>  wrote:
>> I do not look forward to having to maintain a large number of lines that
>> are doomed to go stale
> 
> How often have we changed makefile targets recently? The most recent
> one that I can find is Jakub adding "install-gitweb" in 152d94348f,
> which was back in May 1st. The next one before that is the addition of
> 'gitweb' in 62331ef1637f which was back in January 30th. Besides,
> 'make help' doesn't have to contain _all_ Makefile targets, just the
> important ones that a user is most likely to need. Similar to 'git
> help' itself.
> 
>> and every time we need to touch we need to deal
>> with a lot of noise "@echo '"?
> 
> I don't understand what is particularly bothersome about the leading
> "@echo" lines. Adding or removing a target is still very easy even
> with the leading @echo's, the only thing that would be a PITA is
> reflowing paragraphs, currently, there _are_ no paragraphs, everything
> fits on one line.
> 
>> It might be a bit less distasteful if it were plain text additions at the
>> end of INSTALL file, though.
> 
> That does not help me nearly as much when I want to know how a
> makefile target is called. Am I wrong in asserting that having a "make
> help" target is an accepted "good practice" in the unix world?
> 

help:
    @echo Available make targets:
    @echo -----------------------
    @$(MAKE) --print-data-base --question | \
	sed -n -e '/^Makefile/d' -e 's/^\([a-z0-9_-]*\):.*/\1/p' | \
	sort | uniq | grep -v -e ^git -e ^test-

Automatically self-managing and seems to print most sensible targets.
Adjust to taste with whatever's appropriate.

Users with a too-old make program (pre 3.67, I think), won't be able
to use the help target, but that's perfectly acceptable imo.

-- 
Andreas Ericsson                   andreas.ericsson@op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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