On 16-06-13, David Bremner wrote:
> Tomi Ollila <tomi.ollila@iki.fi> writes:
> 
> > On Mon, Jun 13 2016, David Bremner <david@tethera.net> wrote:
> >
> >> The choice of array implementation is deliberate, for future iterator support
> >> ---
> >>  lib/Makefile.local    |   1 +
> >>  lib/notmuch-private.h |  11 ++++
> >>  lib/string-map.c      | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++
> >>  3 files changed, 165 insertions(+)
> >>  create mode 100644 lib/string-map.c
> >>
> >> diff --git a/lib/Makefile.local b/lib/Makefile.local
> >> index beb9635..9280880 100644
> >> --- a/lib/Makefile.local
> >> +++ b/lib/Makefile.local
> >> @@ -40,6 +40,7 @@ libnotmuch_c_srcs =		\
> >>  	$(dir)/messages.c	\
> >>  	$(dir)/sha1.c		\
> >>  	$(dir)/built-with.c	\
> >> +	$(dir)/string-map.c    \
> >>  	$(dir)/tags.c
> >
> > I suggest everyone to install editor which supports showing tabs & spaces
> > e.g. in different color and also visualizes trailing whitespace & trailing
> > empty lines...
> >
> 
> Heh. If only such a thing existed. What about a pre-commit hook?
> The default (that I have) uses git diff --index --check --cached, but
> that seems not to be enough.
> 
> d
> _______________________________________________

I know you guys are more in the emacs camp but just for reference/inspiration:
in VIM I have a mapping to strip trailing spaces from a file

  noremap <leader>st :%s/\s\+$/<CR>

This could of course go as a sed/grep command in the pre-commit hook. Concerning
the tabs, I have

  " Tabs. Note: Use :retab to clean up mixed indentation
  set expandtab           " Always uses spaces instead of tab characters
  set tabstop=2           " Size of insterted spaces if tab is pressed
  set list                " Highlight tab characters in files
  set listchars=tab:▸\ ,extends:#,nbsp:.,trail:⋅

For the pre-commit hook one could `grep -P '\t' *`. Maybe even better would be
the use of a linter but I am not sure what is most flexible for C code.

Cheers,
Bijan