Assign global context to Hono that can be used across

[simplenotezy]

How can one assign a global context that can be used across the app?

For instance I wish to create a database client (using HYPERDRIVE), and then be able to access that in any router.

When using Apollo server integration for Cloudflare, this is how it's done:

https://github.com/apollo-server-integrations/apollo-server-integration-cloudflare-workers/blob/main/README.md?plain=1#L65-L67

[simplenotezy]

Fixed it with ContextVariableMap:

hono.use(async (c, next) => {
  c.set('dataSource', await createDbClient(c.env));
  await next()
});

// somewhere else:
hono.get('/test', (c) => {
  const client = c.get('dataSource'); // pg client
});

// remember
declare module 'hono' {
  interface ContextVariableMap {
    dataSource: Client;
  }
}