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TIL the `until` shell syntax: https://github.com/patte/fly-tailscale-exit/blob/main/start.sh https://github.com/patte/fly-tailscale-exit/blob/main/start....

• vrosas 3y ago
  Until is great. I use it to remind me if Docker Desktop isn’t running when I try and deploy an app until docker info > /dev/null 2>&1; do echo ”docker isn’t running…” && sleep 2; done
• floodle 3y ago
  How is that different from `while !`?
  • abwizz 3y ago
    'until' executes the statement before the condition. while checks the condition first. should have probably let you find this out for your self.
    • jraph 3y ago
      This is wrong. You must be confusing with the do..while construct we find in some programming languages. until indeed seems like syntax sugar for while !, I don't think there's a difference.
    • ykonstant 3y ago
      > 'until' executes the statement before the condition. This is not the case. From the Open Group Base Specifications Issue 7, 2018 edition, 2.9.4 Compound Commands, The until loop: The format of the until loop is as follows: until compound-list-1 do compound-list-2 done The compound-list-1 shall be executed, and if it has a zero exit status, the until command completes. Otherwise, the compound-list-2 shall be executed, and the process repeats.
  • karatinversion 3y ago
    It's not, except it's a bit nicer to type