Firebase cloud functions deploy only one function

Assumed you have defined your function like this.

exports.yourfunction = functions.https.onRequest(async (req, res) => {
  functions.logger.info("Hello logs!", { structuredData: true });
});

Deploy your function to google cloud with command: firebase deploy –only functions:function_name

firebase deploy --only functions:yourfunction

You should see the completed deploy result like this.

=== Deploying to 'xxxxxxxx'...

i  deploying functions
i  functions: ensuring required API cloudfunctions.googleapis.com is enabled...
i  functions: ensuring required API cloudbuild.googleapis.com is enabled...
✔  functions: required API cloudbuild.googleapis.com is enabled
✔  functions: required API cloudfunctions.googleapis.com is enabled

...

✔  functions[yourfunction(us-central1)]: Successful update operation. 

✔  Deploy complete!