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test-lib: extract Bash version check for '-x' tracing

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One of our test scripts, 't1510-repo-setup.sh' [1], still can't be
reliably run with '-x' tracing enabled, unless it's executed with a
Bash version supporting BASH_XTRACEFD (since v4.1).  We have a lengthy
condition to check the version of the shell running the test script,
and disable tracing if it's not executed with a suitable Bash version
[2].

Move this check out from the option parsing loop, so other options can
imply '-x' by setting 'trace=t', without missing this Bash version
check.

[1] 5827506928 (t1510-repo-setup: mark as untraceable with '-x',
    2018-02-24)
[2] 5fc98e79fc (t: add means to disable '-x' tracing for individual
    test scripts, 2018-02-24)

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
SZEDER Gábor 2019-01-05 02:08:53 +01:00 committed by Junio C Hamano
parent d45cec4bea
commit 0a97e86e9a
1 changed files with 19 additions and 18 deletions
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37
t/test-lib.sh
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@ -317,24 +317,7 @@ do
GIT_TEST_CHAIN_LINT=0
shift ;;
-x)
# Some test scripts can't be reliably traced with '-x',
# unless the test is run with a Bash version supporting
# BASH_XTRACEFD (introduced in Bash v4.1). Check whether
# this test is marked as such, and ignore '-x' if it
# isn't executed with a suitable Bash version.
if test -z "$test_untraceable" || {
test -n "$BASH_VERSION" && eval '
test ${BASH_VERSINFO[0]} -gt 4 || {
test ${BASH_VERSINFO[0]} -eq 4 &&
test ${BASH_VERSINFO[1]} -ge 1
}
'
}
then
trace=t
else
echo >&2 "warning: ignoring -x; '$0' is untraceable without BASH_XTRACEFD"
fi
trace=t
shift ;;
-V|--verbose-log)
verbose_log=t
@ -353,6 +336,24 @@ then
test -z "$verbose_log" && verbose=t
fi
if test -n "$trace" && test -n "$test_untraceable"
then
# '-x' tracing requested, but this test script can't be reliably
# traced, unless it is run with a Bash version supporting
# BASH_XTRACEFD (introduced in Bash v4.1).
if test -n "$BASH_VERSION" && eval '
test ${BASH_VERSINFO[0]} -gt 4 || {
test ${BASH_VERSINFO[0]} -eq 4 &&
test ${BASH_VERSINFO[1]} -ge 1
}
'
then
: Executed by a Bash version supporting BASH_XTRACEFD. Good.
else
echo >&2 "warning: ignoring -x; '$0' is untraceable without BASH_XTRACEFD"
trace=
fi
fi
if test -n "$trace" && test -z "$verbose_log"
then
verbose=t