home-assistant: allow symlinks in static folder

Home Assistant by default does not follow symlinks in its static
folders, which doesn't mix well with serving anything from the nix
store.

2 files changed, 41 insertions, 0 deletions

diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 3fb3e244928ca..c782d36d87f2a 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -396,6 +396,10 @@ in python.pkgs.buildPythonApplication rec {
 
   # leave this in, so users don't have to constantly update their downstream patch handling
   patches = [
+    # Follow symlinks in /var/lib/hass/www
+    ./patches/static-symlinks.patch
+
+    # Patch path to ffmpeg binary
     (substituteAll {
       src = ./patches/ffmpeg-path.patch;
       ffmpeg = "${lib.getBin ffmpeg-headless}/bin/ffmpeg";
diff --git a/pkgs/servers/home-assistant/patches/static-symlinks.patch b/pkgs/servers/home-assistant/patches/static-symlinks.patch
new file mode 100644
index 0000000000000..7784a60f6b2a2
--- /dev/null
+++ b/pkgs/servers/home-assistant/patches/static-symlinks.patch
@@ -0,0 +1,37 @@
+diff --git a/homeassistant/components/frontend/__init__.py b/homeassistant/components/frontend/__init__.py
+index 2ec991750f..9a937006ce 100644
+--- a/homeassistant/components/frontend/__init__.py
++++ b/homeassistant/components/frontend/__init__.py
+@@ -383,7 +383,7 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
+ 
+     local = hass.config.path("www")
+     if os.path.isdir(local):
+-        hass.http.register_static_path("/local", local, not is_dev)
++        hass.http.register_static_path("/local", local, not is_dev, follow_symlinks=True)
+ 
+     # Can be removed in 2023
+     hass.http.register_redirect("/config/server_control", "/developer-tools/yaml")
+diff --git a/homeassistant/components/http/__init__.py b/homeassistant/components/http/__init__.py
+index 122b7b79ce..3cf2b7e0db 100644
+--- a/homeassistant/components/http/__init__.py
++++ b/homeassistant/components/http/__init__.py
+@@ -411,16 +411,16 @@ class HomeAssistantHTTP:
+         )
+ 
+     def register_static_path(
+-        self, url_path: str, path: str, cache_headers: bool = True
++        self, url_path: str, path: str, cache_headers: bool = True, follow_symlinks: bool = False
+     ) -> None:
+         """Register a folder or file to serve as a static path."""
+         if os.path.isdir(path):
+             if cache_headers:
+                 resource: CachingStaticResource | web.StaticResource = (
+-                    CachingStaticResource(url_path, path)
++                    CachingStaticResource(url_path, path, follow_symlinks=follow_symlinks)
+                 )
+             else:
+-                resource = web.StaticResource(url_path, path)
++                resource = web.StaticResource(url_path, path, follow_symlinks=follow_symlinks)
+             self.app.router.register_resource(resource)
+             self.app["allow_configured_cors"](resource)
+             return