[PATCH 06/10] CI: consistently use "export" in ci/lib.sh

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Change the "ci/lib.sh" script to consistently use "export", for
e.g. MAKEFLAGS we were exporting it, and then assigning to it, let's
do it the other way around.

Right now this doesn't matter, since we in
e.g. "ci/install-dependencies.sh" source this file, and don't use
something like "env(1)" to retrieve these variables.

But in a subsequent commit we'll "export" these variables through a
wrapper (and to eventually write them to a GitHub CI-specific
$GITHUB_ENV file). This change makes that subsequent change easier to
read, as it won't need to do any control flow refactoring.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 ci/lib.sh | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/ci/lib.sh b/ci/lib.sh
index 3591919ba44..44039152ebc 100755
--- a/ci/lib.sh
+++ b/ci/lib.sh
@@ -79,7 +79,7 @@ export TERM=${TERM:-dumb}
 NPROC=10
 
 # Clear MAKEFLAGS that may come from the outside world.
-export MAKEFLAGS=--jobs=$NPROC
+MAKEFLAGS=--jobs=$NPROC
 
 if test -n "$SYSTEM_COLLECTIONURI" || test -n "$SYSTEM_TASKDEFINITIONSURI"
 then
@@ -88,9 +88,10 @@ then
 	CC="${CC:-gcc}"
 
 	export GIT_PROVE_OPTS="--timer --jobs $NPROC --state=failed,slow,save"
-	export GIT_TEST_OPTS="--verbose-log -x --write-junit-xml"
+	GIT_TEST_OPTS="--verbose-log -x --write-junit-xml"
 	test Windows_NT != "$AGENT_OS" ||
 	GIT_TEST_OPTS="--no-chain-lint --no-bin-wrappers $GIT_TEST_OPTS"
+	export GIT_TEST_OPTS
 elif test true = "$GITHUB_ACTIONS"
 then
 	CI_TYPE=github-actions
@@ -118,9 +119,10 @@ then
 	}
 
 	export GIT_PROVE_OPTS="--timer --jobs $NPROC"
-	export GIT_TEST_OPTS="--verbose-log -x --github-workflow-markup"
+	GIT_TEST_OPTS="--verbose-log -x --github-workflow-markup"
 	test Windows != "$RUNNER_OS" ||
 	GIT_TEST_OPTS="--no-chain-lint --no-bin-wrappers $GIT_TEST_OPTS"
+	export GIT_TEST_OPTS
 else
 	echo "Could not identify CI type" >&2
 	env >&2
@@ -187,6 +189,7 @@ linux-leaks)
 esac
 
 MAKEFLAGS="$MAKEFLAGS CC=${CC:-cc}"
+export MAKEFLAGS
 
 end_group
 set -x
-- 
2.37.1.996.g651fc6e809f