Re: [PATCH v3 3/3] test-lib: make BAIL_OUT() work in tests and prereq

> BAIL_OUT() is meant to abort the whole test run and print a message with
> a standard prefix that can be parsed to stdout. Since for every test the
> normal fd`s are redirected in test_eval_ this output would not be seen
> when used within the context of a test or prereq like we do in
> test_have_prereq(). To make this function work in these contexts we move
> the setup of the fd aliases a few lines up before the first use of
> BAIL_OUT() and then have this function always print to the alias.
>
> Signed-off-by: Fabian Stelzer <fs@gigacodes.de>
> ---
>  t/test-lib.sh | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/t/test-lib.sh b/t/test-lib.sh
> index f61da562f6..96a09a26a1 100644
> --- a/t/test-lib.sh
> +++ b/t/test-lib.sh
> @@ -589,6 +589,11 @@ USER_TERM="$TERM"
>  TERM=dumb
>  export TERM USER_TERM
>  
> +# Set up additional fds so we can control single test i/o
> +exec 5>&1
> +exec 6<&0
> +exec 7>&2
> +
>  _error_exit () {
>  	finalize_junit_xml
>  	GIT_EXIT_OK=t
> @@ -612,7 +617,7 @@ BAIL_OUT () {
>  	local bail_out="Bail out! "
>  	local message="$1"
>  
> -	say_color error $bail_out "$message"
> +	say_color error $bail_out "$message" >&5
>  	_error_exit
>  }
>  
> @@ -637,9 +642,6 @@ then
>  	exit 0
>  fi
>  
> -exec 5>&1
> -exec 6<&0
> -exec 7>&2