add devcontainer

Author: dkarv

.devcontainer/devcontainer.json

@@ -1,7 +1,33 @@
-// For format details, see https://aka.ms/devcontainer.json. For config options, see the
-// README at: https://github.com/devcontainers/templates/tree/main/src/python
 {
-	"name": "Python 3",
-	"image": "mcr.microsoft.com/devcontainers/python:1-3.13-bullseye",
-	"postCreateCommand": "pip install -r requirements.txt"
+	"name": "dkarv-devcontainer",
+	"build": {
+		"dockerfile": "../dev/Dockerfile"
+	},
+	"runArgs": [
+		"--name",
+		"dkarv-devcontainer"
+	],
+	"appPort": [
+		8123
+	],
+	"postCreateCommand": "/workspaces/ha-lg-ess/dev/bootstrap.sh",
+	"overrideCommand": false,
+	"mounts": [
+		"source=${localWorkspaceFolder}/dev/.config,target=/config,type=bind,consistency=cached",
+		"source=${localWorkspaceFolder}/dev/configuration.yaml,target=/config/configuration.yaml,type=bind,consistency=cached",
+		"source=${localWorkspaceFolder}/custom_components,target=/config/custom_components,type=bind,consistency=cached"
+	],
+	"features": {
+		//"ghcr.io/devcontainers/features/python:1": "none"
+	},
+	"customizations": {
+    "vscode": {
+      "extensions": [
+        "charliermarsh.ruff",
+        "ms-python.pylint",
+        "ms-python.vscode-pylance",
+		"github.copilot-chat"
+	  ]
+	}
 }
+}

.gitignore

@@ -1 +1,2 @@
-__pycache__/
+__pycache__/
+/dev/.config

.vscode/tasks.json

@@ -0,0 +1,21 @@
+{
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "Follow devcontainer logs",
+      "type": "shell",
+      "command": "tail -n 1000 -f /var/log/ha.log",
+      "presentation": {
+        "echo": true,
+        "reveal": "always",
+        "panel": "dedicated",
+        "showReuseMessage": false,
+        "clear": false
+      },
+      "runOptions": {
+        "runOn": "folderOpen"
+      },
+      "problemMatcher": []
+    }
+  ]
+}

dev/Dockerfile

@@ -0,0 +1,7 @@
+FROM homeassistant/home-assistant:2026.1
+
+RUN apk add inotify-tools
+
+COPY ./start.sh /start.sh
+
+ENTRYPOINT ["/start.sh"]

dev/bootstrap.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+pip install -r requirements.txt
+# TODO find way to install dependencies from manifest.json directly

dev/configuration.yaml

@@ -0,0 +1,16 @@
+
+# Loads default set of integrations. Do not remove.
+default_config:
+
+# Load frontend themes from the themes folder
+frontend:
+  themes: !include_dir_merge_named themes
+
+automation: !include automations.yaml
+script: !include scripts.yaml
+scene: !include scenes.yaml
+
+logger:
+  default: info
+  logs:
+    custom_components: debug

dev/start.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+set -euo pipefail
+
+# Log everything to /var/log/ha.log while still printing to the console
+LOGFILE="/var/log/ha.log"
+touch "$LOGFILE" || true
+exec > >(tee -a "$LOGFILE") 2>&1
+
+WATCH_DIR="/config/custom_components"
+DEBOUNCE=10
+
+HA_CMD=(python -m homeassistant --config /config)
+HA_PID=0
+
+start_ha() {
+	echo "Starting Home Assistant..."
+	"${HA_CMD[@]}" &
+	HA_PID=$!
+	echo "Home Assistant started with PID $HA_PID"
+}
+
+stop_ha() {
+	if [ "$HA_PID" -ne 0 ]; then
+		echo "Stopping Home Assistant (PID $HA_PID)..."
+		kill "$HA_PID" 2>/dev/null || true
+		# wait up to 10s
+		for i in {1..10}; do
+			if kill -0 "$HA_PID" 2>/dev/null; then
+				sleep 1
+			else
+				break
+			fi
+		done
+		if kill -0 "$HA_PID" 2>/dev/null; then
+			echo "Force killing Home Assistant (PID $HA_PID)"
+			kill -9 "$HA_PID" 2>/dev/null || true
+		fi
+		wait "$HA_PID" 2>/dev/null || true
+		HA_PID=0
+	fi
+}
+
+trap 'echo "Received termination signal, stopping..."; stop_ha; exit 0' INT TERM EXIT
+
+start_ha
+
+inotifywait -m -r -e close_write,modify,create,delete --format '%w%f' "$WATCH_DIR" | while read -r file; do
+	# ignore changes in Python bytecode caches
+	case "$file" in
+	*/__pycache__/*)
+		continue
+		;;
+	esac
+	echo "Change detected: $file -- restarting Home Assistant"
+	stop_ha
+	start_ha
+	sleep "$DEBOUNCE"
+done
+