Merge branch 'js/ci-discard-prove-state' into maint-2.43

The way CI testing used "prove" could lead to running the test
suite twice needlessly, which has been corrected.

* js/ci-discard-prove-state:
  ci: avoid running the test suite _twice_
  ci: add support for GitLab CI
  ci: install test dependencies for linux-musl
  ci: squelch warnings when testing with unusable Git repo
  ci: unify setup of some environment variables
  ci: split out logic to set up failed test artifacts
  ci: group installation of Docker dependencies
  ci: make grouping setup more generic
  ci: reorder definitions for grouping functions

5 files changed, 234 insertions, 55 deletions

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000000..cd98bcb18a
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,53 @@
+default:
+  timeout: 2h
+
+workflow:
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+    - if: $CI_COMMIT_TAG
+    - if: $CI_COMMIT_REF_PROTECTED == "true"
+
+test:
+  image: $image
+  before_script:
+    - ./ci/install-docker-dependencies.sh
+  script:
+    - useradd builder --create-home
+    - chown -R builder "${CI_PROJECT_DIR}"
+    - sudo --preserve-env --set-home --user=builder ./ci/run-build-and-tests.sh
+  after_script:
+    - |
+      if test "$CI_JOB_STATUS" != 'success'
+      then
+        sudo --preserve-env --set-home --user=builder ./ci/print-test-failures.sh
+      fi
+  parallel:
+    matrix:
+      - jobname: linux-sha256
+        image: ubuntu:latest
+        CC: clang
+      - jobname: linux-gcc
+        image: ubuntu:20.04
+        CC: gcc
+        CC_PACKAGE: gcc-8
+      - jobname: linux-TEST-vars
+        image: ubuntu:20.04
+        CC: gcc
+        CC_PACKAGE: gcc-8
+      - jobname: linux-gcc-default
+        image: ubuntu:latest
+        CC: gcc
+      - jobname: linux-leaks
+        image: ubuntu:latest
+        CC: gcc
+      - jobname: linux-asan-ubsan
+        image: ubuntu:latest
+        CC: clang
+      - jobname: pedantic
+        image: fedora:latest
+      - jobname: linux-musl
+        image: alpine:latest
+  artifacts:
+    paths:
+      - t/failed-test-artifacts
+    when: on_failure
diff --git a/ci/install-docker-dependencies.sh b/ci/install-docker-dependencies.sh
index 78b7e326da..48c43f0f90 100755
--- a/ci/install-docker-dependencies.sh
+++ b/ci/install-docker-dependencies.sh
@@ -3,6 +3,10 @@
 # Install dependencies required to build and test Git inside container
 #
 
+. ${0%/*}/lib.sh
+
+begin_group "Install dependencies"
+
 case "$jobname" in
 linux32)
 	linux32 --32bit i386 sh -c '
@@ -12,11 +16,26 @@ linux32)
 	'
 	;;
 linux-musl)
-	apk add --update build-base curl-dev openssl-dev expat-dev gettext \
-		pcre2-dev python3 musl-libintl perl-utils ncurses >/dev/null
+	apk add --update shadow sudo build-base curl-dev openssl-dev expat-dev gettext \
+		pcre2-dev python3 musl-libintl perl-utils ncurses \
+		apache2 apache2-http2 apache2-proxy apache2-ssl apache2-webdav apr-util-dbd_sqlite3 \
+		bash cvs gnupg perl-cgi perl-dbd-sqlite >/dev/null
+	;;
+linux-*)
+	# Required so that apt doesn't wait for user input on certain packages.
+	export DEBIAN_FRONTEND=noninteractive
+
+	apt update -q &&
+	apt install -q -y sudo git make language-pack-is libsvn-perl apache2 libssl-dev \
+		libcurl4-openssl-dev libexpat-dev tcl tk gettext zlib1g-dev \
+		perl-modules liberror-perl libauthen-sasl-perl libemail-valid-perl \
+		libdbd-sqlite3-perl libio-socket-ssl-perl libnet-smtp-ssl-perl ${CC_PACKAGE:-${CC:-gcc}} \
+		apache2 cvs cvsps gnupg libcgi-pm-perl subversion
 	;;
 pedantic)
 	dnf -yq update >/dev/null &&
 	dnf -yq install make gcc findutils diffutils perl python3 gettext zlib-devel expat-devel openssl-devel curl-devel pcre2-devel >/dev/null
 	;;
 esac
+
+end_group "Install dependencies"
diff --git a/ci/lib.sh b/ci/lib.sh
index bc0b23099d..c749b21366 100755
--- a/ci/lib.sh
+++ b/ci/lib.sh
@@ -1,16 +1,7 @@
 # Library of functions shared by all CI scripts
 
-if test true != "$GITHUB_ACTIONS"
+if test true = "$GITHUB_ACTIONS"
 then
-	begin_group () { :; }
-	end_group () { :; }
-
-	group () {
-		shift
-		"$@"
-	}
-	set -x
-else
 	begin_group () {
 		need_to_end_group=t
 		echo "::group::$1" >&2
@@ -23,27 +14,50 @@ else
 		need_to_end_group=
 		echo '::endgroup::' >&2
 	}
-	trap end_group EXIT
+elif test true = "$GITLAB_CI"
+then
+	begin_group () {
+		need_to_end_group=t
+		printf "\e[0Ksection_start:$(date +%s):$(echo "$1" | tr ' ' _)\r\e[0K$1\n"
+		trap "end_group '$1'" EXIT
+		set -x
+	}
 
-	group () {
+	end_group () {
+		test -n "$need_to_end_group" || return 0
 		set +x
-		begin_group "$1"
-		shift
-		# work around `dash` not supporting `set -o pipefail`
-		(
-			"$@" 2>&1
-			echo $? >exit.status
-		) |
-		sed 's/^\(\([^ ]*\):\([0-9]*\):\([0-9]*:\) \)\(error\|warning\): /::\5 file=\2,line=\3::\1/'
-		res=$(cat exit.status)
-		rm exit.status
-		end_group
-		return $res
+		need_to_end_group=
+		printf "\e[0Ksection_end:$(date +%s):$(echo "$1" | tr ' ' _)\r\e[0K\n"
+		trap - EXIT
 	}
+else
+	begin_group () { :; }
+	end_group () { :; }
 
-	begin_group "CI setup"
+	set -x
 fi
 
+group () {
+	group="$1"
+	shift
+	begin_group "$group"
+
+	# work around `dash` not supporting `set -o pipefail`
+	(
+		"$@" 2>&1
+		echo $? >exit.status
+	) |
+	sed 's/^\(\([^ ]*\):\([0-9]*\):\([0-9]*:\) \)\(error\|warning\): /::\5 file=\2,line=\3::\1/'
+	res=$(cat exit.status)
+	rm exit.status
+
+	end_group "$group"
+	return $res
+}
+
+begin_group "CI setup"
+trap "end_group 'CI setup'" EXIT
+
 # Set 'exit on error' for all CI scripts to let the caller know that
 # something went wrong.
 #
@@ -71,10 +85,32 @@ skip_branch_tip_with_tag () {
 	fi
 }
 
+# Check whether we can use the path passed via the first argument as Git
+# repository.
+is_usable_git_repository () {
+	# We require Git in our PATH, otherwise we cannot access repositories
+	# at all.
+	if ! command -v git >/dev/null
+	then
+		return 1
+	fi
+
+	# And the target directory needs to be a proper Git repository.
+	if ! git -C "$1" rev-parse 2>/dev/null
+	then
+		return 1
+	fi
+}
+
 # Save some info about the current commit's tree, so we can skip the build
 # job if we encounter the same tree again and can provide a useful info
 # message.
 save_good_tree () {
+	if ! is_usable_git_repository .
+	then
+		return
+	fi
+
 	echo "$(git rev-parse $CI_COMMIT^{tree}) $CI_COMMIT $CI_JOB_NUMBER $CI_JOB_ID" >>"$good_trees_file"
 	# limit the file size
 	tail -1000 "$good_trees_file" >"$good_trees_file".tmp
@@ -90,6 +126,11 @@ skip_good_tree () {
 		return
 	fi
 
+	if ! is_usable_git_repository .
+	then
+		return
+	fi
+
 	if ! good_tree_info="$(grep "^$(git rev-parse $CI_COMMIT^{tree}) " "$good_trees_file")"
 	then
 		# Haven't seen this tree yet, or no cached good trees file yet.
@@ -121,6 +162,11 @@ skip_good_tree () {
 }
 
 check_unignored_build_artifacts () {
+	if ! is_usable_git_repository .
+	then
+		return
+	fi
+
 	! git ls-files --other --exclude-standard --error-unmatch \
 		-- ':/*' 2>/dev/null ||
 	{
@@ -133,6 +179,26 @@ handle_failed_tests () {
 	return 1
 }
 
+create_failed_test_artifacts () {
+	mkdir -p t/failed-test-artifacts
+
+	for test_exit in t/test-results/*.exit
+	do
+		test 0 != "$(cat "$test_exit")" || continue
+
+		test_name="${test_exit%.exit}"
+		test_name="${test_name##*/}"
+		printf "\\e[33m\\e[1m=== Failed test: ${test_name} ===\\e[m\\n"
+		echo "The full logs are in the 'print test failures' step below."
+		echo "See also the 'failed-tests-*' artifacts attached to this run."
+		cat "t/test-results/$test_name.markup"
+
+		trash_dir="t/trash directory.$test_name"
+		cp "t/test-results/$test_name.out" t/failed-test-artifacts/
+		tar czf t/failed-test-artifacts/"$test_name".trash.tar.gz "$trash_dir"
+	done
+}
+
 # GitHub Action doesn't set TERM, which is required by tput
 export TERM=${TERM:-dumb}
 
@@ -156,11 +222,8 @@ then
 	# among *all* phases)
 	cache_dir="$HOME/test-cache/$SYSTEM_PHASENAME"
 
-	export GIT_PROVE_OPTS="--timer --jobs 10 --state=failed,slow,save"
-	export GIT_TEST_OPTS="--verbose-log -x --write-junit-xml"
-	MAKEFLAGS="$MAKEFLAGS --jobs=10"
-	test windows_nt != "$CI_OS_NAME" ||
-	GIT_TEST_OPTS="--no-chain-lint --no-bin-wrappers $GIT_TEST_OPTS"
+	GIT_TEST_OPTS="--write-junit-xml"
+	JOBS=10
 elif test true = "$GITHUB_ACTIONS"
 then
 	CI_TYPE=github-actions
@@ -173,40 +236,63 @@ then
 	CC="${CC_PACKAGE:-${CC:-gcc}}"
 	DONT_SKIP_TAGS=t
 	handle_failed_tests () {
-		mkdir -p t/failed-test-artifacts
 		echo "FAILED_TEST_ARTIFACTS=t/failed-test-artifacts" >>$GITHUB_ENV
+		create_failed_test_artifacts
+		return 1
+	}
 
-		for test_exit in t/test-results/*.exit
-		do
-			test 0 != "$(cat "$test_exit")" || continue
-
-			test_name="${test_exit%.exit}"
-			test_name="${test_name##*/}"
-			printf "\\e[33m\\e[1m=== Failed test: ${test_name} ===\\e[m\\n"
-			echo "The full logs are in the 'print test failures' step below."
-			echo "See also the 'failed-tests-*' artifacts attached to this run."
-			cat "t/test-results/$test_name.markup"
-
-			trash_dir="t/trash directory.$test_name"
-			cp "t/test-results/$test_name.out" t/failed-test-artifacts/
-			tar czf t/failed-test-artifacts/"$test_name".trash.tar.gz "$trash_dir"
-		done
+	cache_dir="$HOME/none"
+
+	GIT_TEST_OPTS="--github-workflow-markup"
+	JOBS=10
+elif test true = "$GITLAB_CI"
+then
+	CI_TYPE=gitlab-ci
+	CI_BRANCH="$CI_COMMIT_REF_NAME"
+	CI_COMMIT="$CI_COMMIT_SHA"
+	case "$CI_JOB_IMAGE" in
+	macos-*)
+		CI_OS_NAME=osx;;
+	alpine:*|fedora:*|ubuntu:*)
+		CI_OS_NAME=linux;;
+	*)
+		echo "Could not identify OS image" >&2
+		env >&2
+		exit 1
+		;;
+	esac
+	CI_REPO_SLUG="$CI_PROJECT_PATH"
+	CI_JOB_ID="$CI_JOB_ID"
+	CC="${CC_PACKAGE:-${CC:-gcc}}"
+	DONT_SKIP_TAGS=t
+	handle_failed_tests () {
+		create_failed_test_artifacts
 		return 1
 	}
 
 	cache_dir="$HOME/none"
 
-	export GIT_PROVE_OPTS="--timer --jobs 10"
-	export GIT_TEST_OPTS="--verbose-log -x --github-workflow-markup"
-	MAKEFLAGS="$MAKEFLAGS --jobs=10"
-	test windows != "$CI_OS_NAME" ||
-	GIT_TEST_OPTS="--no-chain-lint --no-bin-wrappers $GIT_TEST_OPTS"
+	runs_on_pool=$(echo "$CI_JOB_IMAGE" | tr : -)
+	JOBS=$(nproc)
 else
 	echo "Could not identify CI type" >&2
 	env >&2
 	exit 1
 fi
 
+MAKEFLAGS="$MAKEFLAGS --jobs=$JOBS"
+GIT_PROVE_OPTS="--timer --jobs $JOBS"
+
+GIT_TEST_OPTS="$GIT_TEST_OPTS --verbose-log -x"
+case "$CI_OS_NAME" in
+windows|windows_nt)
+	GIT_TEST_OPTS="$GIT_TEST_OPTS --no-chain-lint --no-bin-wrappers"
+	;;
+esac
+
+export GIT_TEST_OPTS
+export GIT_PROVE_OPTS
+
 good_trees_file="$cache_dir/good-trees"
 
 mkdir -p "$cache_dir"
@@ -285,5 +371,5 @@ esac
 
 MAKEFLAGS="$MAKEFLAGS CC=${CC:-cc}"
 
-end_group
+end_group "CI setup"
 set -x
diff --git a/ci/print-test-failures.sh b/ci/print-test-failures.sh
index 57277eefcd..c33ad4e3a2 100755
--- a/ci/print-test-failures.sh
+++ b/ci/print-test-failures.sh
@@ -51,6 +51,12 @@ do
 			tar czf failed-test-artifacts/"$test_name".trash.tar.gz "$trash_dir"
 			continue
 			;;
+		gitlab-ci)
+			mkdir -p failed-test-artifacts
+			cp "${TEST_EXIT%.exit}.out" failed-test-artifacts/
+			tar czf failed-test-artifacts/"$test_name".trash.tar.gz "$trash_dir"
+			continue
+			;;
 		*)
 			echo "Unhandled CI type: $CI_TYPE" >&2
 			exit 1
diff --git a/t/lib-httpd.sh b/t/lib-httpd.sh
index 5fe3c8ab69..dbc9977593 100644
--- a/t/lib-httpd.sh
+++ b/t/lib-httpd.sh
@@ -67,7 +67,8 @@ for DEFAULT_HTTPD_MODULE_PATH in '/usr/libexec/apache2' \
 				 '/usr/lib/apache2/modules' \
 				 '/usr/lib64/httpd/modules' \
 				 '/usr/lib/httpd/modules' \
-				 '/usr/libexec/httpd'
+				 '/usr/libexec/httpd' \
+				 '/usr/lib/apache2'
 do
 	if test -d "$DEFAULT_HTTPD_MODULE_PATH"
 	then
@@ -127,6 +128,20 @@ else
 		"Could not identify web server at '$LIB_HTTPD_PATH'"
 fi
 
+if test -n "$LIB_HTTPD_DAV" && test -f /etc/os-release
+then
+	case "$(grep "^ID=" /etc/os-release | cut -d= -f2-)" in
+	alpine)
+		# The WebDAV module in Alpine Linux is broken at least up to
+		# Alpine v3.16 as the default DBM driver is missing.
+		#
+		# https://gitlab.alpinelinux.org/alpine/aports/-/issues/13112
+		test_skip_or_die GIT_TEST_HTTPD \
+			"Apache WebDAV module does not have default DBM backend driver"
+		;;
+	esac
+fi
+
 install_script () {
 	write_script "$HTTPD_ROOT_PATH/$1" <"$TEST_PATH/$1"
 }