Re: [PATCH 4/6] config: return configset value for current_config_ functions

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On Thu, May 19, 2016 at 7:08 AM, Jeff King <peff@xxxxxxxx> wrote:
> On Wed, May 18, 2016 at 06:43:23PM -0400, Jeff King wrote:
>
>>  cache.h                |  1 +
>>  config.c               | 51 +++++++++++++++++++++++++++++++++++++++++---------
>>  t/helper/test-config.c | 20 ++++++++++++++++++++
>>  t/t1308-config-set.sh  | 23 +++++++++++++++++++++++
>> [...]
>> +test_expect_success 'iteration shows correct origins' '
>> +     echo "[alias]test-config = !test-config" >.gitconfig &&

How about using 'which' to get absolute path for test-config and put
it here? Then we don't rely on $PATH anymore.

>> [...]
>> +     git -c foo.bar=from-cmdline test-config iterate >actual &&
>
> While writing and testing this, I got bit by e6e7530 (test helpers: move
> test-* to t/helper/ subdirectory, 2016-04-13). I had an old test-config
> binary leftover in the root of my repository, and the new one was
> correctly built in t/helper/. Running "test-config" is fine, but inside
> the git alias, it sticks the repository root at the front of $PATH
> (because it's the exec-path). And so it ran the old version of
> test-config, which did not understand my new "iterate" option.
>
> Now I'll admit what I'm doing here is pretty funny (running test-* from
> an alias). I'm doing it because I want to see how the program operates
> with the "-c" config, and it's nicer to spell it as a user would,
> instead of munging $GIT_CONFIG_PARAMETERS directly.
>
> So I'm not sure if it's worth working around or not. The single tree
> state produced by this commit is fine, but it does behave badly if
> there's leftover cruft from a pre-e6e7530 build. A more robust version
> would look more like:
>
>   sq=\' ;# to ease quoting later
>   ...
>   GIT_CONFIG_PARAMETERS=${sq}foo.bar=from-cmdline${sq} test-config ...
>
> Which is ugly, but it's probably worth it to avoid the flakiness.
>
> The other option is to somehow make bin-wrappers more robust. E.g., it
> would be nice if we didn't actually point into the repository root
> directly, but rather somehow linked all of the git-* entries that
> _would_ be installed into the exec-path into a fake exec-path (or
> alternatively, actually build them directly into that fake exec-path).
>
> That's a much bigger change, though. Given how unlikely the sequence of
> steps in my test is, maybe it's better to just work around it in this
> one case.
>
> -Peff



-- 
Duy
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