Prepare build environment

.github/workflows/tests.yaml

@@ -11,6 +11,9 @@ jobs:
     - name: Check out repository code
       uses: actions/checkout@v4
 
+    - name: Prepare build environment
+      run: ./prepare.sh -us | tee -a "$GITHUB_ENV"
+
     - name: Build
       run: make build
 

prepare.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+set -o nounset -o pipefail -o errexit
+
+SUDO=${SUDO-}
+DISTRO=${DISTRO-}
+UPDATE=${UPDATE-}
+while getopts "ud:sS:-" OPT; do
+    case $OPT in
+        d) DISTRO=$OPTARG ;;
+        u) UPDATE=1 ;;
+        s) SUDO=sudo ;;
+        S) SUDO=$OPTARG ;;
+        -) break ;;
+        ?) usage 2 ;;
+    esac
+done
+shift $((OPTIND-1))
+
+if [ -z "$DISTRO" ]; then
+    DISTRO=$(lsb_release -is)
+fi
+echo "distro: $DISTRO" 1>&2
+
+if [ "$DISTRO" = "Arch" ]; then
+    if [ -n "$UPDATE" ]; then
+        $SUDO pacman -Sy
+    fi
+    $SUDO pacman -S lua libxrandr
+elif [ "$DISTRO" = "Ubuntu" ]; then
+    if [ -n "$UPDATE" ]; then
+        $SUDO apt-get update 1>&2
+    fi
+    $SUDO apt-get install --yes --no-install-recommends 1>&2 \
+        make \
+        liblua5.4-dev libxrandr-dev
+    echo "LUA_PKG=lua54"
+else
+    echo "unconfigured distribution: $DISTRO" 1>&2
+    exit 1
+fi