[PATCH v2 0/4] making test-suite tracing more useful

[Jeff King <peff@peff.net>]

This series fixes some rough edges in the "-x" feature of the test
suite. With it, it should be possible to turn on tracing for CI runs.

This is mostly a repost of v1 at:

  https://public-inbox.org/git/20171019210140.64lb52cqtgdh22ew@sigill.intra.peff.net

which had some discussion, but wasn't picked up.

I fixed a few typos pointed out by reviewers, and I tried to summarize
the discussion around "magic descriptor 4" in the commit message of
patch 2.  My conclusion there was that none of the options is
particularly good.  The only thing thing that might make sense is making
"7" the magical descriptor. But given that "4" only had one troubling
call, I'm inclined to just leave it as-is and see if this ever comes up
again (especially if we start using "-x" in the Travis builds, then we'd
catch any problems).

  [1/4]: test-lib: silence "-x" cleanup under bash
  [2/4]: t5615: avoid re-using descriptor 4
  [3/4]: test-lib: make "-x" work with "--verbose-log"
  [4/4]: t/Makefile: introduce TEST_SHELL_PATH

 Makefile                 |  8 ++++++++
 t/Makefile               |  6 ++++--
 t/t5615-alternate-env.sh |  6 +++---
 t/test-lib.sh            | 46 +++++++++++++++++++++++++++++++++-------------
 4 files changed, 48 insertions(+), 18 deletions(-)

-Peff