gitlab-ci: enable "GIT_TEST_LONG"

Starting with 7a094d68a2 (ci: run expensive tests on push builds to
integration branches, 2026-05-08) we run expensive tests in our CI for
certain events. So far, this has only been wired up for GitHub Workflows
though, which creates a test gap for GitLab CI.

Plug this gap by also making this work for the latter.

Note that these tests cannot be run on the Windows runners, as they only
have 7.5GB of RAM. This is insufficient for some of the EXPENSIVE tests,
so we explicitly disable "GIT_TEST_LONG" on these jobs.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

.gitlab-ci.yml

@@ -147,6 +147,9 @@ test:mingw64:
   needs:
     - job: "build:mingw64"
       artifacts: true
+  variables:
+    # Windows runners don't have enough RAM to run EXPENSIVE tests.
+    GIT_TEST_LONG: false
   before_script:
     - *windows_before_script
     - git-sdk/usr/bin/bash.exe -l -c 'tar xf artifacts/artifacts.tar.gz'
@@ -195,6 +198,9 @@ test:msvc-meson:
   script:
     - |
       & "C:/Program Files/Git/usr/bin/bash.exe" -l -c 'ci/run-test-slice-meson.sh build $CI_NODE_INDEX $CI_NODE_TOTAL'
+  variables:
+    # Windows runners don't have enough RAM to run EXPENSIVE tests.
+    GIT_TEST_LONG: false
   after_script:
     - |
       if ($env:CI_JOB_STATUS -ne "success") {

ci/lib.sh

@@ -215,6 +215,7 @@ then
 	test macos != "$CI_OS_NAME" || CI_OS_NAME=osx
 	CI_REPO_SLUG="$GITHUB_REPOSITORY"
 	CI_JOB_ID="$GITHUB_RUN_ID"
+	CI_EVENT="$GITHUB_EVENT_NAME"
 	CC="${CC_PACKAGE:-${CC:-gcc}}"
 	DONT_SKIP_TAGS=t
 	handle_failed_tests () {
@@ -239,6 +240,13 @@ then
 	CI_BRANCH="$CI_COMMIT_REF_NAME"
 	CI_COMMIT="$CI_COMMIT_SHA"
 
+	case "$CI_PIPELINE_SOURCE" in
+	merge_request_event)
+		CI_EVENT=pull_request;;
+	*)
+		CI_EVENT="$CI_PIPELINE_SOURCE";;
+	esac
+
 	case "$OS,$CI_JOB_IMAGE" in
 	Windows_NT,*)
 		CI_OS_NAME=windows
@@ -319,9 +327,9 @@ export SKIP_DASHED_BUILT_INS=YesPlease
 # enable "expensive" tests for PR events.
 # In order to catch bugs introduced at integration time by mismerges,
 # enable the long tests for pushes to the integration branches as well.
-case "$GITHUB_EVENT_NAME,$CI_BRANCH" in
+case "$CI_EVENT,$CI_BRANCH" in
 pull_request,*|push,*next*|push,*master*|push,*main*|push,*maint*)
-	export GIT_TEST_LONG=true
+	export GIT_TEST_LONG=${GIT_TEST_LONG:-true}
 	;;
 esac