Module runtime 

Where the Chromium engine lives.

On Linux the engine — the tilo-chromium-host process and the Chromium Embedded Framework it loads — is its own signed Tilo runtime bundle, RUNTIME_REF. It is installed the way every runtime bundle is: by the image at /usr/lib/tilo-runtime/<version>, or for one user under the per-user runtime directory. An app that embeds the engine names the bundle in its manifest’s [package].optional-runtimes, and the launcher verifies the bundle’s signature and mounts it read-only at /run/tilo-runtime/<version> inside the app’s sandbox. Outside the launcher the installed bundle is used directly.

On macOS the packaged app carries the engine as a nested application in its Contents/Frameworks directory.

A missing engine is an ordinary state: locate reports it as RuntimeMissing, which an app shows as “not installed” and logs with RuntimeMissing::developer_hint.

Structs

RuntimeMissing

No engine runtime was found in any place it is installed.

SearchRoots

The places the engine is looked for, in order.

Constants

FAILED_MESSAGE

What a person sees when an installed engine fails to start. The cause goes to the log.

HOST_IN_BUNDLE

The host executable, relative to the bundle root.

HOST_OVERRIDE_ENV

Names a host executable directly, for a developer running a locally built engine. Release images never set it.

MOUNT_ROOT

Where the launcher mounts runtime bundles inside an app’s sandbox.

NOT_INSTALLED_MESSAGE

What a person sees when the engine is not installed.

RUNTIME_DIR_ENV

Overrides the per-user runtime root, as it does for every runtime bundle.

RUNTIME_REF

The runtime reference an app manifest lists in [package].optional-runtimes.

RUNTIME_VERSION

The engine runtime’s version: the directory name of its bundle and of its mount. Bump it whenever the host’s protocol or its pinned CEF build changes, or when a host repair must reach an already installed bundle. The Store keeps a verified bundle already present at this version.

SYSTEM_ROOT

Where the image installs system runtime bundles.

Functions

locate

The engine host of the running process.