Don't activate venv in devcontainer (#8128)

script/run-in-env.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+
+import os
+from pathlib import Path
+import subprocess
+import sys
+
+
+def find_and_activate_virtualenv():
+    if (
+        ("VIRTUAL_ENV" in os.environ)
+        or os.environ.get("DEVCONTAINER", False)
+        or os.environ.get("ESPHOME_NO_VENV", False)
+    ):
+        return
+
+    try:
+        # Get the top-level directory of the git repository
+        my_path = subprocess.check_output(
+            ["git", "rev-parse", "--show-toplevel"], text=True
+        ).strip()
+    except subprocess.CalledProcessError:
+        print(
+            "Error: Not a git repository or unable to determine the top-level directory.",
+            file=sys.stderr,
+        )
+        return
+
+    # Check for virtual environments
+    for venv in ["venv", ".venv", "."]:
+        activate_path = (
+            Path(my_path)
+            / venv
+            / ("Scripts" if os.name == "nt" else "bin")
+            / "activate"
+        )
+        if activate_path.exists():
+            # Activate the virtual environment by updating PATH
+            venv_bin_dir = activate_path.parent
+            os.environ["PATH"] = f"{venv_bin_dir}{os.pathsep}{os.environ['PATH']}"
+            os.environ["VIRTUAL_ENV"] = str(venv_bin_dir.parent)
+            print(f"Activated virtual environment: {venv_bin_dir.parent}")
+            return
+
+    print("No virtual environment found.", file=sys.stderr)
+
+
+def run_command():
+    # Execute the remaining arguments in the new environment
+    if len(sys.argv) > 1:
+        subprocess.run(sys.argv[1:], check=False)
+    else:
+        print(
+            "No command provided to run in the virtual environment.",
+            file=sys.stderr,
+        )
+
+
+if __name__ == "__main__":
+    find_and_activate_virtualenv()
+    run_command()