auto mediamtx installation

pi/install_roverd.sh

@@ -6,7 +6,8 @@ set -euo pipefail
 
 BINARY_SRC="dist/roverd"
 CONFIG_SRC="pi/roverd/roverd.sample.yaml"
-INSTALL_MEDIAMTX=0
+INSTALL_MEDIAMTX=1
+MEDIAMTX_VERSION="1.8.6"
 
 usage() {
 	cat <<'USAGE'
@@ -16,7 +17,8 @@ Options:
   -b, --binary <path>   Path to the roverd binary (default: dist/roverd)
   -c, --config <path>   Source config to install if /etc/roverd.yaml is missing
                         (default: pi/roverd/roverd.sample.yaml)
-      --mediamtx        Also install mediaMTX unit/config (requires pi/mediamtx files)
+      --mediamtx        Install/download mediaMTX (binary, config, systemd unit)
+      --mediamtx-version <v>  Override mediaMTX release tag (default: 1.8.6)
   -h, --help            Show this help text
 
 The script must run from the repository root and as root (sudo). It will:
@@ -41,6 +43,10 @@ while [[ $# -gt 0 ]]; do
 			INSTALL_MEDIAMTX=1
 			shift
 			;;
+		--mediamtx-version)
+			MEDIAMTX_VERSION="${2:-}"
+			shift 2
+			;;
 		-h|--help)
 			usage
 			exit 0
@@ -70,9 +76,15 @@ fi
 
 ensure_user() {
 	local user="$1"
-	local groups="$2"
+	local groups="${2:-}"
 	if ! id -u "$user" >/dev/null 2>&1; then
-		useradd -r -s /usr/sbin/nologin -G "$groups" "$user"
+		if [[ -n "$groups" ]]; then
+			useradd -r -s /usr/sbin/nologin -G "$groups" "$user"
+		else
+			useradd -r -s /usr/sbin/nologin "$user"
+		fi
+	elif [[ -n "$groups" ]]; then
+		usermod -a -G "$groups" "$user"
 	fi
 }
 
@@ -80,6 +92,51 @@ log() {
 	echo "[$(date -u +%Y-%m-%dT%H:%M:%SZ)] $*"
 }
 
+detect_mediamtx_asset() {
+	local arch
+	arch="$(uname -m)"
+	case "$arch" in
+		armv7l|armv6l)
+			echo "mediamtx_v${MEDIAMTX_VERSION}_linux_armv7.tar.gz"
+			;;
+		aarch64|arm64)
+			echo "mediamtx_v${MEDIAMTX_VERSION}_linux_arm64.tar.gz"
+			;;
+		x86_64|amd64)
+			echo "mediamtx_v${MEDIAMTX_VERSION}_linux_amd64.tar.gz"
+			;;
+		*)
+			echo ""
+			;;
+	esac
+}
+
+install_mediamtx_binary() {
+	if ! command -v curl >/dev/null 2>&1; then
+		echo "curl is required to download mediaMTX" >&2
+		exit 1
+	}
+	local asset
+	asset="$(detect_mediamtx_asset)"
+	if [[ -z "$asset" ]]; then
+		echo "Unsupported architecture $(uname -m) for mediaMTX download" >&2
+		exit 1
+	}
+	local url="https://github.com/bluenviron/mediamtx/releases/download/v${MEDIAMTX_VERSION}/${asset}"
+	local tmpdir
+	tmpdir="$(mktemp -d)"
+	log "Downloading mediaMTX ${MEDIAMTX_VERSION} (${asset})"
+	if ! curl -fsSL "$url" -o "${tmpdir}/${asset}"; then
+		echo "Failed to download mediaMTX from ${url}" >&2
+		rm -rf "$tmpdir"
+		exit 1
+	}
+	tar -xzf "${tmpdir}/${asset}" -C "$tmpdir" mediamtx
+	install -o mediamtx -g mediamtx -m 0755 "${tmpdir}/mediamtx" /usr/local/bin/mediamtx
+	log "Installed /usr/local/bin/mediamtx"
+	rm -rf "$tmpdir"
+}
+
 ensure_user roverd "dialout,gpio"
 install -o roverd -g roverd -m 0755 "$BINARY_SRC" /usr/local/bin/roverd
 log "Installed roverd binary"
@@ -117,6 +174,7 @@ if [[ $INSTALL_MEDIAMTX -eq 1 ]]; then
 	fi
 
 	ensure_user mediamtx ""
+	install_mediamtx_binary
 	install -d -o mediamtx -g mediamtx /etc/mediamtx
 	install -o mediamtx -g mediamtx -m 0644 pi/mediamtx/mediamtx.yml /etc/mediamtx/mediamtx.yml
 	install -m 0644 pi/systemd/mediamtx.service /etc/systemd/system/mediamtx.service