Dynamic port

[tobiasBora]

If I specify:

start-server-and-test start-server http://localhost:8080 test

to start the webserver automatically, I need to know the port it will be using in advance. But by default, vite will pick the first port that is available (which I consider to be a good thing)… hence I cannot know in advance the code to port to use.

I'd love start-server-and-test to automatically detect the URL/port… not sure what is the best solution for this, but maybe using a (configurable) regexp to parse the first occurence of an url like http://localhost:5176/ in stdout would be a good solution. This URL should then automatically be forwarded to the script, I guess the simplest would be using an environment variable.

See also the related microsoft/playwright#31235

[fidian]

I use get-port-cli to do this. However, the systems that run this command are not using Windows, so your mileage may vary.

export PORT=$(get-port); start-server-and-test start-server http://localhost:$PORT test

[tobiasBora]

Thanks. But what I don't like with something like get-port is that it is not super resilient to race conditions, like if a program picks the port between the export and the start-server, this will fail.