ci: Move installation of common dependencies to a separate script

Since we would be building custom images and system extensions, having
a centralize script has the following advantages:

1. Provides a single place to add/bump dependencies.
2. Allows us to automatically stop building dependencies for
   GNOME OS that has been updated to a recent-enough version.

See https://discourse.gnome.org/t/towards-a-better-way-to-hack-and-test-your-system-components/21075
See https://gitlab.gnome.org/GNOME/gnome-build-meta/-/issues/837

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3843>

.gitlab-ci.yml

@@ -128,21 +128,11 @@ variables:
         https://gitlab.gnome.org/jadahl/catch.git \
         main
 
-      ./.gitlab-ci/install-meson-project.sh \
-        https://gitlab.freedesktop.org/wayland/wayland.git \
-        1.23.0
-
       ./.gitlab-ci/install-meson-project.sh \
         https://gitlab.gnome.org/GNOME/gi-docgen.git \
         main
 
-      ./.gitlab-ci/install-meson-project.sh \
+      ./.gitlab-ci/install-common-dependencies.sh
-        https://gitlab.freedesktop.org/wayland/wayland-protocols.git \
-        1.36
-
-      ./.gitlab-ci/install-meson-project.sh \
-        https://gitlab.gnome.org/GNOME/gsettings-desktop-schemas.git \
-        master
 
       rpm -e --nodeps gnome-bluetooth-libs-devel \
                       mutter mutter-devel \

.gitlab-ci/install-common-dependencies.sh

@@ -0,0 +1,81 @@
+#!/bin/bash
+
+set -e
+
+usage() {
+  cat <<-EOF
+	Usage: $(basename $0) [OPTION…]
+
+	Install common dependencies to a base image or system extension
+
+	Options:
+	  --libdir       Setup the projects with a different libdir
+	  --destdir      Install the projects to an additional destdir
+
+	  -h, --help     Display this help
+
+	EOF
+}
+
+TEMP=$(getopt \
+  --name=$(basename $0) \
+  --options='' \
+  --longoptions='libdir:' \
+  --longoptions='destdir:' \
+  --longoptions='help' \
+  -- "$@")
+
+eval set -- "$TEMP"
+unset TEMP
+
+OPTIONS=()
+
+while true; do
+  case "$1" in
+    --libdir)
+      OPTIONS+=( --libdir=$2 )
+      shift 2
+    ;;
+
+    --destdir)
+      OPTIONS+=( --destdir=$2 )
+      shift 2
+    ;;
+
+    -h|--help)
+      usage
+      exit 0
+    ;;
+
+    --)
+      shift
+      break
+    ;;
+  esac
+done
+
+SCRIPTS_DIR="$(dirname $0)"
+
+if ! pkgconf --atleast-version 1.23.0 wayland-server
+then
+     ./$SCRIPTS_DIR/install-meson-project.sh \
+       "${OPTIONS[@]}" \
+       https://gitlab.freedesktop.org/wayland/wayland.git \
+       1.23.0
+fi
+
+if ! pkgconf --atleast-version 1.36 wayland-protocols
+then
+    ./$SCRIPTS_DIR/install-meson-project.sh \
+      "${OPTIONS[@]}" \
+      https://gitlab.freedesktop.org/wayland/wayland-protocols.git \
+      1.36
+fi
+
+if ! gsettings get org.gnome.desktop.interface accent-color >/dev/null 2>&1
+then
+    ./$SCRIPTS_DIR/install-meson-project.sh \
+      "${OPTIONS[@]}" \
+      https://gitlab.gnome.org/GNOME/gsettings-desktop-schemas.git \
+      master
+fi