Watch commands parameter => run command on watch triggered

[adminy]

Prerequisites

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🚀 Feature Proposal

Every time there is a file change I would like to run the standard command on the code, unfortunately there is no arguments that watch takes in to configure it to do that, but it seems like a very useful feature if we could do something pre/post watch event like spotting any linting issues and reporting them in the terminal.

Motivation

It seems like something a watch command should be able to do, since its not just a mechanism for hot server reload but sometimes it can be extra, like running a linter command.

Example

fastify start index.js -wPV --ignore-watch='node_modules .git .vscode' --on-watch-change='standard --fix'

[mcollina]

Thanks for reporting! Would you like to send a Pull Request to address this issue? Remember to add unit tests.