ci: install JGit dependency

We have some tests in t5310 that use JGit to verify that bitmaps can be
read both by Git and by JGit. We do not execute these tests in our CI
jobs though because we don't make JGit available there. Consequently,
the tests basically bitrot because almost nobody is ever going to have
JGit in their path.

Install JGit to plug this test gap.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

ci/install-dependencies.sh

@@ -9,6 +9,7 @@ begin_group "Install dependencies"
 
 P4WHENCE=https://cdist2.perforce.com/perforce/r21.2
 LFSWHENCE=https://github.com/github/git-lfs/releases/download/v$LINUX_GIT_LFS_VERSION
+JGITWHENCE=https://repo.eclipse.org/content/groups/releases//org/eclipse/jgit/org.eclipse.jgit.pgm/6.8.0.202311291450-r/org.eclipse.jgit.pgm-6.8.0.202311291450-r.sh
 
 # Make sudo a no-op and execute the command directly when running as root.
 # While using sudo would be fine on most platforms when we are root already,
@@ -39,7 +40,7 @@ ubuntu-*)
 	sudo apt-get -q update
 	sudo apt-get -q -y install \
 		language-pack-is libsvn-perl apache2 cvs cvsps git gnupg subversion \
-		make libssl-dev libcurl4-openssl-dev libexpat-dev wget sudo \
+		make libssl-dev libcurl4-openssl-dev libexpat-dev wget sudo default-jre \
 		tcl tk gettext zlib1g-dev perl-modules liberror-perl libauthen-sasl-perl \
 		libemail-valid-perl libio-socket-ssl-perl libnet-smtp-ssl-perl libdbd-sqlite3-perl libcgi-pm-perl \
 		${CC_PACKAGE:-${CC:-gcc}} $PYTHON_PACKAGE
@@ -53,6 +54,9 @@ ubuntu-*)
 	tar -xzf "git-lfs-linux-amd64-$LINUX_GIT_LFS_VERSION.tar.gz" \
 		-C "$CUSTOM_PATH" --strip-components=1 "git-lfs-$LINUX_GIT_LFS_VERSION/git-lfs"
 	rm "git-lfs-linux-amd64-$LINUX_GIT_LFS_VERSION.tar.gz"
+
+	wget --quiet "$JGITWHENCE" --output-document="$CUSTOM_PATH/jgit"
+	chmod a+x "$CUSTOM_PATH/jgit"
 	;;
 ubuntu32-*)
 	sudo linux32 --32bit i386 sh -c '
@@ -113,6 +117,7 @@ then
 else
 	echo >&2 "WARNING: perforce wasn't installed, see above for clues why"
 fi
+
 if type git-lfs >/dev/null 2>&1
 then
 	echo "$(tput setaf 6)Git-LFS Version$(tput sgr0)"
@@ -121,4 +126,12 @@ else
 	echo >&2 "WARNING: git-lfs wasn't installed, see above for clues why"
 fi
 
+if type jgit >/dev/null 2>&1
+then
+	echo "$(tput setaf 6)JGit Version$(tput sgr0)"
+	jgit version
+else
+	echo >&2 "WARNING: JGit wasn't installed, see above for clues why"
+fi
+
 end_group "Install dependencies"