ab/only-single-progress-at-once (was: What's cooking in git.git (Oct 2021, #05; Mon, 18))

On Mon, Oct 18 2021, Junio C Hamano wrote:

* ab/only-single-progress-at-once (2021-10-13) 10 commits
 - progress.c: add & assert a "global_progress" variable
 - various *.c: use isatty(1|2), not isatty(STDIN_FILENO|STDERR_FILENO)
 - pack-bitmap-write.c: don't return without stop_progress()
 - progress.c: add temporary variable from progress struct
 - progress.c: call progress_interval() from progress_test_force_update()
 - progress.c: move signal handler functions lower
 - progress.c tests: test some invalid usage
 - progress.c tests: make start/stop verbs on stdin
 - progress.c test helper: add missing braces
 - leak tests: fix a memory leaks in "test-progress" helper

 Further tweaks on progress API.

 Will merge to 'next'?

I think it should be ready & has reviewed quite a bit of review so far.

Taylor lifted one of the patches for his just-submitted topic:
https://lore.kernel.org/git/cover.1634787555.git.me@ttaylorr.com/ (local); just
an FYI in terms of graduation/merging etc.