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-rwxr-xr-xthird_party/git/ci/config/allow-ref.sample27
-rwxr-xr-xthird_party/git/ci/install-dependencies.sh28
-rwxr-xr-xthird_party/git/ci/install-docker-dependencies.sh18
-rwxr-xr-xthird_party/git/ci/lib.sh53
-rwxr-xr-xthird_party/git/ci/print-test-failures.sh7
-rwxr-xr-xthird_party/git/ci/run-build-and-tests.sh8
-rwxr-xr-xthird_party/git/ci/run-docker-build.sh (renamed from third_party/git/ci/run-linux32-build.sh)39
-rwxr-xr-xthird_party/git/ci/run-docker.sh47
-rwxr-xr-xthird_party/git/ci/run-linux32-docker.sh31
-rwxr-xr-xthird_party/git/ci/run-static-analysis.sh3
-rwxr-xr-xthird_party/git/ci/test-documentation.sh3
11 files changed, 211 insertions, 53 deletions
diff --git a/third_party/git/ci/config/allow-ref.sample b/third_party/git/ci/config/allow-ref.sample
new file mode 100755
index 000000000000..af0e076f8a32
--- /dev/null
+++ b/third_party/git/ci/config/allow-ref.sample
@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# Sample script for enabling/disabling GitHub Actions CI runs on
+# particular refs. By default, CI is run for all branches pushed to
+# GitHub. You can override this by dropping the ".sample" from the script,
+# editing it, committing, and pushing the result to the "ci-config" branch of
+# your repository:
+#
+#   git checkout -b ci-config
+#   cp allow-ref.sample allow-ref
+#   $EDITOR allow-ref
+#   git add allow-ref
+#   git commit -am "implement my ci preferences"
+#   git push
+#
+# This script will then be run when any refs are pushed to that repository. It
+# gets the fully qualified refname as the first argument, and should exit with
+# success only for refs for which you want to run CI.
+
+case "$1" in
+# allow one-off tests by pushing to "for-ci" or "for-ci/mybranch"
+refs/heads/for-ci*) true ;;
+# always build your integration branch
+refs/heads/my-integration-branch) true ;;
+# don't build any other branches or tags
+*) false ;;
+esac
diff --git a/third_party/git/ci/install-dependencies.sh b/third_party/git/ci/install-dependencies.sh
index 8cc72503cb76..0229a77f7d28 100755
--- a/third_party/git/ci/install-dependencies.sh
+++ b/third_party/git/ci/install-dependencies.sh
@@ -7,12 +7,16 @@
 
 P4WHENCE=http://filehost.perforce.com/perforce/r$LINUX_P4_VERSION
 LFSWHENCE=https://github.com/github/git-lfs/releases/download/v$LINUX_GIT_LFS_VERSION
+UBUNTU_COMMON_PKGS="make libssl-dev libcurl4-openssl-dev libexpat-dev
+ tcl tk gettext zlib1g-dev perl-modules liberror-perl libauthen-sasl-perl
+ libemail-valid-perl libio-socket-ssl-perl libnet-smtp-ssl-perl"
 
 case "$jobname" in
 linux-clang|linux-gcc)
 	sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
 	sudo apt-get -q update
-	sudo apt-get -q -y install language-pack-is libsvn-perl apache2
+	sudo apt-get -q -y install language-pack-is libsvn-perl apache2 \
+		$UBUNTU_COMMON_PKGS
 	case "$jobname" in
 	linux-gcc)
 		sudo apt-get -q -y install gcc-8
@@ -40,23 +44,37 @@ osx-clang|osx-gcc)
 	test -z "$BREW_INSTALL_PACKAGES" ||
 	brew install $BREW_INSTALL_PACKAGES
 	brew link --force gettext
+	brew cask install --no-quarantine perforce || {
+		# Update the definitions and try again
+		cask_repo="$(brew --repository)"/Library/Taps/homebrew/homebrew-cask &&
+		git -C "$cask_repo" pull --no-stat &&
+		brew cask install --no-quarantine perforce
+	} ||
 	brew install caskroom/cask/perforce
 	case "$jobname" in
 	osx-gcc)
-		brew link gcc@8
+		brew install gcc@9
+		# Just in case the image is updated to contain gcc@9
+		# pre-installed but not linked.
+		brew link gcc@9
 		;;
 	esac
 	;;
 StaticAnalysis)
 	sudo apt-get -q update
-	sudo apt-get -q -y install coccinelle
+	sudo apt-get -q -y install coccinelle libcurl4-openssl-dev libssl-dev \
+		libexpat-dev gettext make
 	;;
 Documentation)
 	sudo apt-get -q update
-	sudo apt-get -q -y install asciidoc xmlto
+	sudo apt-get -q -y install asciidoc xmlto docbook-xsl-ns make
 
 	test -n "$ALREADY_HAVE_ASCIIDOCTOR" ||
-	gem install --version 1.5.8 asciidoctor
+	sudo gem install --version 1.5.8 asciidoctor
+	;;
+linux-gcc-4.8|GETTEXT_POISON)
+	sudo apt-get -q update
+	sudo apt-get -q -y install $UBUNTU_COMMON_PKGS
 	;;
 esac
 
diff --git a/third_party/git/ci/install-docker-dependencies.sh b/third_party/git/ci/install-docker-dependencies.sh
new file mode 100755
index 000000000000..26a6689766d7
--- /dev/null
+++ b/third_party/git/ci/install-docker-dependencies.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+#
+# Install dependencies required to build and test Git inside container
+#
+
+case "$jobname" in
+Linux32)
+	linux32 --32bit i386 sh -c '
+		apt update >/dev/null &&
+		apt install -y build-essential libcurl4-openssl-dev \
+			libssl-dev libexpat-dev gettext python >/dev/null
+	'
+	;;
+linux-musl)
+	apk add --update build-base curl-dev openssl-dev expat-dev gettext \
+		pcre2-dev python3 musl-libintl perl-utils ncurses >/dev/null
+	;;
+esac
diff --git a/third_party/git/ci/lib.sh b/third_party/git/ci/lib.sh
index 44db2d5cbb22..38c0eac351e7 100755
--- a/third_party/git/ci/lib.sh
+++ b/third_party/git/ci/lib.sh
@@ -34,6 +34,11 @@ save_good_tree () {
 # successfully before (e.g. because the branch got rebased, changing only
 # the commit messages).
 skip_good_tree () {
+	if test "$TRAVIS_DEBUG_MODE" = true || test true = "$GITHUB_ACTIONS"
+	then
+		return
+	fi
+
 	if ! good_tree_info="$(grep "^$(git rev-parse $CI_COMMIT^{tree}) " "$good_trees_file")"
 	then
 		# Haven't seen this tree yet, or no cached good trees file yet.
@@ -74,6 +79,9 @@ check_unignored_build_artifacts ()
 	}
 }
 
+# GitHub Action doesn't set TERM, which is required by tput
+export TERM=${TERM:-dumb}
+
 # Clear MAKEFLAGS that may come from the outside world.
 export MAKEFLAGS=
 
@@ -126,14 +134,33 @@ then
 		echo "$SYSTEM_TASKDEFINITIONSURI$SYSTEM_TEAMPROJECT/_build/results?buildId=$1"
 	}
 
-	BREW_INSTALL_PACKAGES=gcc@8
 	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 $GIT_TEST_OPTS"
+elif test true = "$GITHUB_ACTIONS"
+then
+	CI_TYPE=github-actions
+	CI_BRANCH="$GITHUB_REF"
+	CI_COMMIT="$GITHUB_SHA"
+	CI_OS_NAME="$(echo "$RUNNER_OS" | tr A-Z a-z)"
+	test macos != "$CI_OS_NAME" || CI_OS_NAME=osx
+	CI_REPO_SLUG="$GITHUB_REPOSITORY"
+	CI_JOB_ID="$GITHUB_RUN_ID"
+	CC="${CC:-gcc}"
+	DONT_SKIP_TAGS=t
+
+	cache_dir="$HOME/none"
+
+	export GIT_PROVE_OPTS="--timer --jobs 10"
+	export GIT_TEST_OPTS="--verbose-log -x"
+	MAKEFLAGS="$MAKEFLAGS --jobs=10"
+	test windows != "$CI_OS_NAME" ||
+	GIT_TEST_OPTS="--no-chain-lint --no-bin-wrappers $GIT_TEST_OPTS"
 else
 	echo "Could not identify CI type" >&2
+	env >&2
 	exit 1
 fi
 
@@ -141,6 +168,7 @@ good_trees_file="$cache_dir/good-trees"
 
 mkdir -p "$cache_dir"
 
+test -n "${DONT_SKIP_TAGS-}" ||
 skip_branch_tip_with_tag
 skip_good_tree
 
@@ -151,16 +179,20 @@ fi
 
 export DEVELOPER=1
 export DEFAULT_TEST_TARGET=prove
-export GIT_TEST_CLONE_2GB=YesPlease
+export GIT_TEST_CLONE_2GB=true
+export SKIP_DASHED_BUILT_INS=YesPlease
 
 case "$jobname" in
 linux-clang|linux-gcc)
 	if [ "$jobname" = linux-gcc ]
 	then
 		export CC=gcc-8
+		MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=/usr/bin/python3"
+	else
+		MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=/usr/bin/python2"
 	fi
 
-	export GIT_TEST_HTTPD=YesPlease
+	export GIT_TEST_HTTPD=true
 
 	# The Linux build installs the defined dependency versions below.
 	# The OS X build installs much more recent versions, whichever
@@ -177,7 +209,10 @@ linux-clang|linux-gcc)
 osx-clang|osx-gcc)
 	if [ "$jobname" = osx-gcc ]
 	then
-		export CC=gcc-8
+		export CC=gcc-9
+		MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=$(which python3)"
+	else
+		MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=$(which python2)"
 	fi
 
 	# t9810 occasionally fails on Travis CI OS X
@@ -185,9 +220,17 @@ osx-clang|osx-gcc)
 	# Travis CI OS X
 	export GIT_SKIP_TESTS="t9810 t9816"
 	;;
-GIT_TEST_GETTEXT_POISON)
+GETTEXT_POISON)
 	export GIT_TEST_GETTEXT_POISON=true
 	;;
+Linux32)
+	CC=gcc
+	;;
+linux-musl)
+	CC=gcc
+	MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=/usr/bin/python3 USE_LIBPCRE2=Yes"
+	MAKEFLAGS="$MAKEFLAGS NO_REGEX=Yes ICONV_OMITS_BOM=Yes"
+	;;
 esac
 
 MAKEFLAGS="$MAKEFLAGS CC=${CC:-cc}"
diff --git a/third_party/git/ci/print-test-failures.sh b/third_party/git/ci/print-test-failures.sh
index e688a26f0d61..92a983a265c2 100755
--- a/third_party/git/ci/print-test-failures.sh
+++ b/third_party/git/ci/print-test-failures.sh
@@ -46,6 +46,13 @@ do
 			mv "$trash_dir" failed-test-artifacts
 			continue
 			;;
+		github-actions)
+			mkdir -p failed-test-artifacts
+			echo "::set-env name=FAILED_TEST_ARTIFACTS::t/failed-test-artifacts"
+			cp "${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/third_party/git/ci/run-build-and-tests.sh b/third_party/git/ci/run-build-and-tests.sh
index ff0ef7f08e75..6c27b886b8f0 100755
--- a/third_party/git/ci/run-build-and-tests.sh
+++ b/third_party/git/ci/run-build-and-tests.sh
@@ -19,7 +19,15 @@ linux-gcc)
 	export GIT_TEST_OE_SIZE=10
 	export GIT_TEST_OE_DELTA_SIZE=5
 	export GIT_TEST_COMMIT_GRAPH=1
+	export GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=1
 	export GIT_TEST_MULTI_PACK_INDEX=1
+	export GIT_TEST_ADD_I_USE_BUILTIN=1
+	make test
+	;;
+linux-clang)
+	export GIT_TEST_DEFAULT_HASH=sha1
+	make test
+	export GIT_TEST_DEFAULT_HASH=sha256
 	make test
 	;;
 linux-gcc-4.8)
diff --git a/third_party/git/ci/run-linux32-build.sh b/third_party/git/ci/run-docker-build.sh
index e3a193adbce3..8d47a5fda3b1 100755
--- a/third_party/git/ci/run-linux32-build.sh
+++ b/third_party/git/ci/run-docker-build.sh
@@ -1,25 +1,33 @@
 #!/bin/sh
 #
-# Build and test Git in a 32-bit environment
+# Build and test Git inside container
 #
 # Usage:
-#   run-linux32-build.sh <host-user-id>
+#   run-docker-build.sh <host-user-id>
 #
 
 set -ex
 
 if test $# -ne 1 || test -z "$1"
 then
-	echo >&2 "usage: run-linux32-build.sh <host-user-id>"
+	echo >&2 "usage: run-docker-build.sh <host-user-id>"
 	exit 1
 fi
 
-# Update packages to the latest available versions
-linux32 --32bit i386 sh -c '
-    apt update >/dev/null &&
-    apt install -y build-essential libcurl4-openssl-dev libssl-dev \
-	libexpat-dev gettext python >/dev/null
-'
+case "$jobname" in
+Linux32)
+	switch_cmd="linux32 --32bit i386"
+	;;
+linux-musl)
+	switch_cmd=
+	useradd () { adduser -D "$@"; }
+	;;
+*)
+	exit 1
+	;;
+esac
+
+"${0%/*}/install-docker-dependencies.sh"
 
 # If this script runs inside a docker container, then all commands are
 # usually executed as root. Consequently, the host user might not be
@@ -51,10 +59,17 @@ else
 fi
 
 # Build and test
-linux32 --32bit i386 su -m -l $CI_USER -c '
+command $switch_cmd su -m -l $CI_USER -c "
 	set -ex
+	export DEVELOPER='$DEVELOPER'
+	export DEFAULT_TEST_TARGET='$DEFAULT_TEST_TARGET'
+	export GIT_PROVE_OPTS='$GIT_PROVE_OPTS'
+	export GIT_TEST_OPTS='$GIT_TEST_OPTS'
+	export GIT_TEST_CLONE_2GB='$GIT_TEST_CLONE_2GB'
+	export MAKEFLAGS='$MAKEFLAGS'
+	export cache_dir='$cache_dir'
 	cd /usr/src/git
-	test -n "$cache_dir" && ln -s "$cache_dir/.prove" t/.prove
+	test -n '$cache_dir' && ln -s '$cache_dir/.prove' t/.prove
 	make
 	make test
-'
+"
diff --git a/third_party/git/ci/run-docker.sh b/third_party/git/ci/run-docker.sh
new file mode 100755
index 000000000000..37fa372052dd
--- /dev/null
+++ b/third_party/git/ci/run-docker.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+#
+# Download and run Docker image to build and test Git
+#
+
+. ${0%/*}/lib.sh
+
+case "$jobname" in
+Linux32)
+	CI_CONTAINER="daald/ubuntu32:xenial"
+	;;
+linux-musl)
+	CI_CONTAINER=alpine
+	;;
+*)
+	exit 1
+	;;
+esac
+
+docker pull "$CI_CONTAINER"
+
+# Use the following command to debug the docker build locally:
+# <host-user-id> must be 0 if podman is used as drop-in replacement for docker
+# $ docker run -itv "${PWD}:/usr/src/git" --entrypoint /bin/sh "$CI_CONTAINER"
+# root@container:/# export jobname=<jobname>
+# root@container:/# /usr/src/git/ci/run-docker-build.sh <host-user-id>
+
+container_cache_dir=/tmp/travis-cache
+
+docker run \
+	--interactive \
+	--env DEVELOPER \
+	--env DEFAULT_TEST_TARGET \
+	--env GIT_PROVE_OPTS \
+	--env GIT_TEST_OPTS \
+	--env GIT_TEST_CLONE_2GB \
+	--env MAKEFLAGS \
+	--env jobname \
+	--env cache_dir="$container_cache_dir" \
+	--volume "${PWD}:/usr/src/git" \
+	--volume "$cache_dir:$container_cache_dir" \
+	"$CI_CONTAINER" \
+	/usr/src/git/ci/run-docker-build.sh $(id -u $USER)
+
+check_unignored_build_artifacts
+
+save_good_tree
diff --git a/third_party/git/ci/run-linux32-docker.sh b/third_party/git/ci/run-linux32-docker.sh
deleted file mode 100755
index 751acfcf8a8c..000000000000
--- a/third_party/git/ci/run-linux32-docker.sh
+++ /dev/null
@@ -1,31 +0,0 @@
-#!/bin/sh
-#
-# Download and run Docker image to build and test 32-bit Git
-#
-
-. ${0%/*}/lib.sh
-
-docker pull daald/ubuntu32:xenial
-
-# Use the following command to debug the docker build locally:
-# $ docker run -itv "${PWD}:/usr/src/git" --entrypoint /bin/bash daald/ubuntu32:xenial
-# root@container:/# /usr/src/git/ci/run-linux32-build.sh <host-user-id>
-
-container_cache_dir=/tmp/travis-cache
-
-docker run \
-	--interactive \
-	--env DEVELOPER \
-	--env DEFAULT_TEST_TARGET \
-	--env GIT_PROVE_OPTS \
-	--env GIT_TEST_OPTS \
-	--env GIT_TEST_CLONE_2GB \
-	--env cache_dir="$container_cache_dir" \
-	--volume "${PWD}:/usr/src/git" \
-	--volume "$cache_dir:$container_cache_dir" \
-	daald/ubuntu32:xenial \
-	/usr/src/git/ci/run-linux32-build.sh $(id -u $USER)
-
-check_unignored_build_artifacts
-
-save_good_tree
diff --git a/third_party/git/ci/run-static-analysis.sh b/third_party/git/ci/run-static-analysis.sh
index a19aa7ebbc09..65bcebda41a0 100755
--- a/third_party/git/ci/run-static-analysis.sh
+++ b/third_party/git/ci/run-static-analysis.sh
@@ -26,4 +26,7 @@ then
 	exit 1
 fi
 
+make hdr-check ||
+exit 1
+
 save_good_tree
diff --git a/third_party/git/ci/test-documentation.sh b/third_party/git/ci/test-documentation.sh
index d49089832de0..de41888430a2 100755
--- a/third_party/git/ci/test-documentation.sh
+++ b/third_party/git/ci/test-documentation.sh
@@ -7,7 +7,10 @@
 
 filter_log () {
 	sed -e '/^GIT_VERSION = /d' \
+	    -e "/constant Gem::ConfigMap is deprecated/d" \
 	    -e '/^    \* new asciidoc flags$/d' \
+	    -e '/stripped namespace before processing/d' \
+	    -e '/Attributed.*IDs for element/d' \
 	    "$1"
 }