Re: [PATCH v3 1/2] difftool: add a skeleton for the upcoming builtin

On Sat, Nov 26, 2016 at 01:22:28PM +0100, Johannes Schindelin wrote:

In other words, GIT_CONFIG_PARAMETERS is *explicitly scrubbed* from the
environment when we run our tests (by the code block between the "before"
and the "after" statements in the diff above).

Sorry if I wasn't clear. I meant to modify t7800 to run the tests twice,
once with the existing script and once with the builtin. I.e., to set
the variable after test-lib.sh has done its scrubbing, and then use a
loop or similar to go through the tests twice.

If you want to control it from outside the test script, you'd need
something like:

  if test "$GIT_TEST_DIFFTOOL" = "builtin"
  then
	GIT_CONFIG_PARAMETERS=...
  fi

-Peff