svelte-kit preview --https ... ignores custom cert in config.kit.vite.[preview|server].https

[alipi]

Describe the bug

The custom cert config in config.kit.vite.[preview|server].https is now ignored by svelte-kit preview --https ....

This patch works, but I don't know if it's the correct fix:

$ cat @sveltejs+kit+1.0.0-next.355.patch
diff --git a/node_modules/@sveltejs/kit/dist/cli.js b/node_modules/@sveltejs/kit/dist/cli.js
index 8b3547b..b868a2e 100644
--- a/node_modules/@sveltejs/kit/dist/cli.js
+++ b/node_modules/@sveltejs/kit/dist/cli.js
@@ -181,7 +181,7 @@ prog
                        // optional config from command-line flags
                        // these should take precedence, but not print conflict warnings
                        if (host) vite_config.preview.host = host;
-                       if (https) vite_config.preview.https = https;
+                       if (https) vite_config.preview.https = vite_config.preview.https || https;
                        if (port) vite_config.preview.port = port;
 
                        const preview_server = await vite.preview(vite_config);

Reproduction

svelte.config.js:

config.kit.vite.preview = {
   https: {
      key: readFileSync(resolve(__dirname, "my-dev.key"), "utf8"),
      cert: readFileSync(resolve(__dirname, "my-dev.crt"), "utf8")
   }
};

run:
$ npx svelte-kit preview --https --host --port 5000

Some internally created cert is returned instead of the one specified in the config.

$ openssl s_client -showcerts -servername localhost -connect localhost:5000 <<< "Q" | openssl x509 -text | grep -iA2 "Validity"
depth=0 CN = example.org, C = US, ST = Virginia, L = Blacksburg, O = Test, OU = Test
verify error:num=18:self-signed certificate
verify return:1
depth=0 CN = example.org, C = US, ST = Virginia, L = Blacksburg, O = Test, OU = Test
verify return:1
DONE
        Validity
            Not Before: Jun 29 10:05:25 2022 GMT
            Not After : Jul 29 10:05:25 2022 GMT

Logs

No response

System Info

$ npx envinfo --system --binaries --browsers --npmPackages "{svelte,@sveltejs/*,vite}"

  System:
    OS: Linux 5.10 Generic 36 (Generic) 36 (Generic)
    CPU: (8) x64 Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
    Memory: 14.75 GB / 15.59 GB
    Container: Yes
    Shell: 5.1.16 - /bin/bash
  Binaries:
    Node: 16.14.0 - /usr/bin/node
    npm: 8.13.1 - /usr/local/bin/npm

Severity

blocking an upgrade

Additional Information

No response