[PATCH 0/3] config: fix case sensitive subsection names on writing

[Stefan Beller <sbeller@google.com>]

On Mon, Jul 30, 2018 at 5:50 AM Johannes Schindelin <Johannes.Schindelin@gmx.de> wrote:
> Thanks for the patch!
>
> The only thing that was not clear to me from the patch and from the commit
> message was: the first part *is* case insensitive, right?

right.

> How does the
> patch take care of that? Is it relying on `git_config_parse_key()` to do
> that? If so, I don't see it...

It turns out it doesn't quite do that;
The parsing code takes the old notation into account and translates any
  [V.A]
    r = ...
into a lower cased "v.a." for ease of comparison. That happens in
get_base_var, which would call further into get_extended_base_var
if the new notation is used.

The code in store_aux_event however is written without the consideration
of the old code and has no way of knowing the capitalization of the
section or subsection (which were forced to lowercase in the old
dot notation). 

So either we have to do some major surgery, or the old notation gets
some regression while fixing the new notation.

> > I would still hold the judgment on "all except only this one"
> > myself.  That's a bit too early in my mind.
>
> Agreed. I seem to remember that I had a funny problem "in the reverse",
> where http.<url>.* is case-sensitive, but in an unexpected way: if the URL
> contains upper-case characters, the <url> part of the config key needs to
> be downcased, otherwise the setting won't be picked up.

I wrote some patches that show more of what is happening.

I suggest to drop the last patch and only take the first two,
or if we decide we want to be fully correct, we'd want to discuss
how to make it happen. (where to store the information that we are
dealing with an old notation)

Thanks,
Stefan

Stefan Beller (3):
  t1300: document current behavior of setting options
  config: fix case sensitive subsection names on writing
  config: treat section case insensitive in store_aux_event

 config.c          | 16 ++++++++-
 t/t1300-config.sh | 89 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 104 insertions(+), 1 deletion(-)

-- 
2.18.0.132.g195c49a2227