ci: add missing dependency for TTY prereq

In "t/lib-terminal.sh", we declare a lazy prerequisite for tests that
require a TTY. The prerequisite uses a Perl script to figure out whether
we do have a usable TTY or not and thus implicitly depends on the PERL
prerequisite, as well. Furthermore though, the script requires another
dependency that is easy to miss, namely on the IO::Pty module. If that
module is not installed, then the script will exit early due to an
reason unrelated to missing TTYs.

This easily leads to missing test coverage. But most importantly, our CI
systems are missing this dependency and thus don't execute those tests
at all. Fix this.

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

Author: pks-t

ci/install-dependencies.sh

@@ -27,7 +27,7 @@ alpine-*)
 	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
+		bash cvs gnupg perl-cgi perl-dbd-sqlite perl-io-tty >/dev/null
 	;;
 fedora-*)
 	dnf -yq update >/dev/null &&
@@ -42,7 +42,7 @@ ubuntu-*)
 		language-pack-is libsvn-perl apache2 cvs cvsps git gnupg subversion \
 		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 \
+		libemail-valid-perl libio-pty-perl libio-socket-ssl-perl libnet-smtp-ssl-perl libdbd-sqlite3-perl libcgi-pm-perl \
 		${CC_PACKAGE:-${CC:-gcc}} $PYTHON_PACKAGE
 
 	mkdir --parents "$CUSTOM_PATH"