[ Sorry if this is a duplicate, I had a problem with my mail client
and I'm not sure where the previous incarntation went ]
In article <20060624062236.GA19117@xxxxxxxxxxxx> you wrote:
> On Fri, Jun 23, 2006 at 04:56:41PM +0200, Markus Armbruster wrote:
>> Horms <horms@xxxxxxxxxxxx> writes:
>>
>> > The existing etags invocation does not seem to work for me,
>> > but using xargs in the same way that it is used for crats does.
>> > I'm pretty sure that is because on Debian etags == ctags,
>> > does anyone have etags lying around to test if this works?
>> >
>> > Also, I'm pretty sure this xargs approach will break for both ctags
>> > and etags if there are too many files to for one command line,
>> > as ctags/etags will be invoked multiple times, and the resulting
>> > tags file will only contain the tags for the last invocation.
>> >
>> > Signed-Off-By: Horms <horms@xxxxxxxxxxxx>
>> > --- x/xen/Makefile
>> > +++ x/xen/Makefile
>> > @@ -132,7 +136,7 @@ endef
>> >
>> > .PHONY: _TAGS
>> > _TAGS:
>> > - $(all_sources) | etags -
>> > + $(all_sources) | xargs etags
>>
>> When xargs invokes etags more than once (i.e. it's actually needed),
>> each invocation will clobber the output of the previous one.
>
> Indeed, I was concerned about that.
>
>> To run
>> etags on an arbitrarily long file list, try something like
>>
>> rm -f TAGS && $(all_sources) | xargs etags -a
>
> Is the rm -f TAGS neccessary?
On further research I see that -a means append, so yes the rm is
neccessary.
> I believe that for ctags the following will work. At least it seems
> to work just fine here with exuberant-ctags 5.5.4
>
> $(all_sources) | xargs ctags -L -
For the record, xargs should not be present in the above command line
$(all_sources) | ctags -L -
However, the same syntax as etags can also be used, which is nice for
uniformity
rm -f tags && $(all_sources) | xargs ctags -a
I will post a patch that uses the -a approach for both etags and ctags.
This should work for pretty much all systems. In particular I tested
debian, where ctags and etags are the same binary, and this approach
works because a TAGS file is produced when the binary is invoked as
etags, and a tags file is produced when the binary is invoked as etags.
--
Horms
H: http://www.vergenet.net/~horms/ W: http://www.valinux.co.jp/en/
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