[PATCH v4 4/4] ci: install python on ubuntu

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From: Jiang Xin <zhiyou.jx@xxxxxxxxxxxxxxx>

Python is missing from the default ubuntu-22.04 runner image, which
prevent git-p4 from working. To install python on ubuntu, we need to
provide correct package name:

 * On Ubuntu 18.04 (bionic), "/usr/bin/python2" is provided by the
   "python" package, and "/usr/bin/python3" is provided by the "python3"
   package.

 * On Ubuntu 20.04 (focal) and above, "/usr/bin/python2" is provided by
   the "python2" package which has a different name from bionic, and
   "/usr/bin/python3" is provided by "python3".

Since the "ubuntu-latest" runner image has a higher version, so its safe
to use "python2" or "python3" package name.

Helped-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
Signed-off-by: Jiang Xin <zhiyou.jx@xxxxxxxxxxxxxxx>
---
 ci/install-dependencies.sh | 2 +-
 ci/lib.sh                  | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
index b569893b38..d8fafc8ed2 100755
--- a/ci/install-dependencies.sh
+++ b/ci/install-dependencies.sh
@@ -15,7 +15,7 @@ case "$runs_on_pool" in
 ubuntu-*)
 	sudo apt-get -q update
 	sudo apt-get -q -y install language-pack-is libsvn-perl apache2 \
-		$UBUNTU_COMMON_PKGS $CC_PACKAGE
+		$UBUNTU_COMMON_PKGS $CC_PACKAGE $PYTHON_PACKAGE
 	mkdir --parents "$P4_PATH"
 	pushd "$P4_PATH"
 		wget --quiet "$P4WHENCE/bin.linux26x86_64/p4d"
diff --git a/ci/lib.sh b/ci/lib.sh
index 927b4529b0..cb30699f34 100755
--- a/ci/lib.sh
+++ b/ci/lib.sh
@@ -232,12 +232,12 @@ ubuntu-*)
 		break
 	fi
 
-	if [ "$jobname" = linux-gcc ]
+	PYTHON_PACKAGE=python2
+	if test "$jobname" = linux-gcc
 	then
-		MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=/usr/bin/python3"
-	else
-		MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=/usr/bin/python2"
+		PYTHON_PACKAGE=python3
 	fi
+	MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=/usr/bin/$PYTHON_PACKAGE"
 
 	export GIT_TEST_HTTPD=true
 
-- 
2.39.0.rc0




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