Can I reindex from the command line?

Every time I open a new project that I haven't worked in for a few months, I inevitably end up waiting 10 minutes for everything to recompile and reindex. I want to create a script that runs through every project in a directory, pulls the latest commit from master, and then recompiles and reindexes it. That way, I can run the script at the end of the day when I don't need my computer for a few hours, and all of my projects will be up to date and ready to go when I need them. Is there any way to do this?