Skip all Autotest parallelism tests if using Guix’s bash.

It is not clear to me why, but the “parallel autotest and signal
handling” test malfunctions if the active shell is Guix bash.  I don’t
think it’s worth investigating in detail, considering I intend to
reimplement parallel autotest using the same technique that Automake’s
parallel test driver uses, i.e. make -j, which should eliminate this
entire class of problems.

diff --git a/tests/autotest.at b/tests/autotest.at
index df9b738da39662e53b7f2bcc2c4366ea3dcd2acd..4367ff29eceb7ec9ce32bdf29404ccf3faacb93c 100644 (file)
--- a/tests/autotest.at
+++ b/tests/autotest.at
@@ -1445,9 +1445,17 @@ AT_SKIP_IF([${CONFIG_SHELL-$SHELL} -c 'test -z "${BASH_VERSION+set}]]dnl
 AT_CHECK([mkfifo fifo || exit 77])
 AT_CHECK([${CONFIG_SHELL-$SHELL} -c '(set -m && set +m) || exit 77'],
         [], [], [ignore])
+# Parallel tests malfunction with Guix's bash, as of this writing
+# (bash 5.1.8(1)-release, guix 9584b1d 2023-03-12).  I haven't been
+# able to figure out why.
+# It is *probably* safe to assume that if the shell is Bash and /gnu/store
+# exists, then we also have realpath and $(...).
+AT_SKIP_IF(
+  [${CONFIG_SHELL-$SHELL} -c 'test "${BASH_VERSION+set}" = set' &&
+   test -d /gnu/store &&
+   test "$(realpath "${CONFIG_SHELL-$SHELL}" | cut -c-10)" = /gnu/store])
 ])
 
-
 ## ----------------------- ##
 ## parallel test execution ##
 ## ----------------------- ##