I started paying around with Crystal lang, I want to use OptionParser to show a help text, however -h will be interpred by Crystal instead of OptionParser
I am using the example from https://crystal-lang.org/api/0.18.7/OptionParser.html
and calling the app myAppl with:
crystal src/myAppl.cr --help
This shows Crystal help. Now, if I compile the app then it shows the help text I wrote OptionParser
What I am doing wrong?
Have a look at the first line of that help output:
Usage: crystal run [options] [programfile] [--] [arguments]
That -- is what allows you to force an argument to be passed to the compiled program rather than being used by the compiler. So following your example:
crystal src/myApp1.cr -- --help
Of course if you compile your program you can just pass it directly to the resulting binary:
crystal build src/myApp1.cr
./myApp1 --help