[PATCH v3 0/3] test-lib-functions.sh: keep user's HOME, TERM and SHELL for 'test_pause' and 'debug'

Changes since v2:

 * Added '-a' flag as suggested by Elijah, equivalent to '-t -s -h' for
   'test_pause' and to '-t -h' for 'debug'

v2:

 * added 1/3 as a preliminary step to use TEST_SHELL_PATH in test_pause
   instead of SHELL_PATH, as suggested by Carlo
 * implemented the change in behaviour through optional flags in both
   test_pause and debug. This seemed to be the simplest way to keep the
   current behaviour but also provide a way to improve the UX.

v1: This series proposes two small quality-of-life improvements (in my opinion) to the 'test_pause' and 'debug' test functions: using the original values of HOME and TERM (before they are changed by the test framework) and using SHELL instead of SHELL_PATH.

The later might be too big of a change, but I think it makes sense. We could add a new GIT_TEST_* to conditionnaly change the behaviour, but I kept it simple for v1.

Cheers, Philippe.

Philippe Blain (3):
  test-lib-functions: use 'TEST_SHELL_PATH' in 'test_pause'
  test-lib-functions: optionally keep HOME, TERM and SHELL in
    'test_pause'
  test-lib-functions: optionally keep HOME and TERM in 'debug'

 t/test-lib-functions.sh | 104 ++++++++++++++++++++++++++++++++++------
 t/test-lib.sh           |   6 ++-
 2 files changed, 93 insertions(+), 17 deletions(-)

base-commit: 225bc32a989d7a22fa6addafd4ce7dcd04675dbf
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1022%2Fphil-blain%2Ftest-pause-and-debug-easier-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1022/phil-blain/test-pause-and-debug-easier-v3
Pull-Request: https://github.com/gitgitgadget/git/pull/1022

Range-diff vs v2:

 1:  2f566f330e0 = 1:  2f566f330e0 test-lib-functions: use 'TEST_SHELL_PATH' in 'test_pause'
 2:  00211457ece ! 2:  328b5d6e76f test-lib-functions: optionally keep HOME, TERM and SHELL in 'test_pause'
     @@ t/test-lib-functions.sh: test_tick () {
      +#	This allows you to use your regular shell environment and Git aliases.
      +#	WARNING: this can break test reproducibility.
      +#	CAUTION: this can overwrite files in your HOME.
     ++#   -a
     ++#	Shortcut for -t -s -h
       
       test_pause () {
      -	"$TEST_SHELL_PATH" <&6 >&5 2>&7
     @@ t/test-lib-functions.sh: test_tick () {
      +		-h)
      +			PAUSE_HOME="$USER_HOME"
      +			;;
     ++		-a)
     ++			PAUSE_TERM="$USER_TERM"
     ++			PAUSE_SHELL="$SHELL"
     ++			PAUSE_HOME="$USER_HOME"
     ++			;;
      +		*)
      +			break
      +			;;
 3:  1fac9baec1d ! 3:  4e43bd086b5 test-lib-functions: optionally keep HOME and TERM in 'debug'
     @@ t/test-lib-functions.sh: test_pause () {
      +#	This allows your debugger to find its config file in your home.
      +#	WARNING: this can break test reproducibility.
      +#	CAUTION: this can overwrite files in your HOME.
     ++#   -a
     ++#	Shortcut for -t -h
      +#
       # Examples:
       #     debug git checkout master
     @@ t/test-lib-functions.sh: test_pause () {
      +		-h)
      +			DEBUG_HOME="$USER_HOME"
      +			;;
     ++		-a)
     ++			DEBUG_TERM="$USER_TERM"
     ++			DEBUG_HOME="$USER_HOME"
     ++			;;
      +		-d)
      +			GIT_DEBUGGER="$2" &&
      +			shift