exec_until

Simple CLI tool that executes the given command until the given timeout or a pattern is matched. When the timeout is reached or the pattern is matched, the process running the command will be terminated.

Example usage

Basic explanation

❯ ./exec_until -h
usage:./exec_until[flags] <command>

flags:
  -k    Whether the process should be terminated on pattern matched. (default true)
  -p string
        Pattern to match (required)
  -t duration
        Timeout duration. Set to 0 for no timeout. (default 3s)

Minimal examples

❯ ./exec_until -p "foo bar" echo foo bar
pattern matched: foo bar

❯ ./exec_until -p "bar foo" echo foo bar
Error: command completed without a match

❯ ./exec_until -p "bar foo" sleep 5
Error: timeout reached, pattern not matched

Real-life example

I use way-displays to manage my displays, but I don't want the program to keep running in the background. I only launch it on-demand with a specific configuration. Therefore I created this command to help me terminate the program once it's correctly configured my current setup.

./exec_until -p="Changes successful" way-displays -c ~/.config/way-displays/cfg.dock.yaml

TODO

• (fix) Currently some issues with passing arguments, i.e. if you pass exec_until -p "hi" mycommand | grep something, command mycommand | grep something is not correctly executed. Current workaround: exec_until -p "hi" "mycommand | grep something"
• (fix) Currently user lose zsh suggestions and syntax highlighting on command passed to CLI app