VSCode / devcontainer updates (#4647)

.devcontainer/devcontainer.json

@@ -4,12 +4,17 @@
   "postCreateCommand": [
     "script/devcontainer-post-create"
   ],
+  "containerEnv": {
+    "DEVCONTAINER": "1"
+  },
   "runArgs": [
     "--privileged",
     "-e",
     "ESPHOME_DASHBOARD_USE_PING=1"
   ],
   "appPort": 6052,
+  "customizations": {
+    "vscode": {
       "extensions": [
         // python
         "ms-python.python",
@@ -51,6 +56,8 @@
         "files.associations": {
           "**/.vscode/*.json": "jsonc"
         },
-    "C_Cpp.clang_format_path": "/usr/bin/clang-format-13",
+        "C_Cpp.clang_format_path": "/usr/bin/clang-format-13"
+      }
+    }
   }
 }

.vscode/tasks.json

@@ -2,15 +2,24 @@
   "version": "2.0.0",
   "tasks": [
     {
-      "label": "run",
+      "label": "Run Dashboard",
       "type": "shell",
-      "command": "python3 -m esphome dashboard config/",
+      "command": "${command:python.interpreterPath}",
+      "args": [
+        "-m",
+        "esphome",
+        "dashboard",
+        "config/"
+      ],
       "problemMatcher": []
     },
     {
       "label": "clang-tidy",
       "type": "shell",
-      "command": "./script/clang-tidy",
+      "command": "${command:python.interpreterPath}",
+      "args": [
+        "./script/clang-tidy"
+      ],
       "problemMatcher": [
         {
           "owner": "clang-tidy",

script/setup

@@ -4,6 +4,12 @@
 set -e
 
 cd "$(dirname "$0")/.."
+
+if [ ! -n "$DEVCONTAINER" ] && [ ! -n "$VIRTUAL_ENV" ]; then
+  python3 -m venv venv
+  source venv/bin/activate
+fi
+
 pip3 install -r requirements.txt -r requirements_optional.txt -r requirements_test.txt
 pip3 install --no-use-pep517 -e .