home-assistant: add update script

pkgs/servers/home-assistant/update.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -p nix -p jq -p curl -p bash -p git -p nix-update -i bash
+
+set -eux
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+cd "$DIR"
+
+CURRENT_VERSION=$(nix eval --raw '(with import ../../.. {}; home-assistant.version)')
+TARGET_VERSION=$(curl https://api.github.com/repos/home-assistant/core/releases/latest | jq -r '.name')
+MANIFEST=$(curl https://raw.githubusercontent.com/home-assistant/core/${TARGET_VERSION}/homeassistant/components/frontend/manifest.json)
+FRONTEND_VERSION=$(echo $MANIFEST | jq -r '.requirements[] | select(startswith("home-assistant-frontend")) | sub(".*==(?<vers>.*)"; .vers)')
+
+if [[ "$CURRENT_VERSION" == "$TARGET_VERSION" ]]; then
+    echo "home-assistant is up-to-date: ${CURRENT_VERSION}"
+    exit 0
+fi
+
+
+sed -i -e "s/version =.*/version = \"${TARGET_VERSION}\";/" \
+    component-packages.nix
+
+sed -i -e "s/hassVersion =.*/hassVersion = \"${TARGET_VERSION}\";/" \
+    default.nix
+
+./parse-requirements.py
+(
+    cd ../../..
+    nix-update --version "$FRONTEND_VERSION" home-assistant.hass-frontend
+    nix-update --version "$TARGET_VERSION" --build home-assistant
+)
+
+git add ./component-packages.nix ./default.nix ./frontend.nix
+git commit -m "homeassistant: ${CURRENT_VERSION} -> ${TARGET_VERSION}"