How can I modify rg (ripgrep) to perform case sensitive search only when the given PATTERN has any uppercase char?

[tifDev]

Some comands like fd automatically detects if the PATTERN has any uppercase letter it performs a case sensitive search, otherwise it performs a case insentive search. I want to apply this feature to rg so that the default is case insensitive and only if the given PATTERN has any Uppercase then it performs a case sensitive search.

How can I achieve this?

I tried to add this code as an alias but it didn't worked as expected:

rg () {
  if [[ "$1" =~ [A-Z] ]] || [[ "$2" =~ [A-Z] ]] || [[ "$3" =~ [A-Z] ]]; then
    # has uppercase
    rg
  else
    # no uppercase
    rg -i
  fi
}

[BurntSushi]

You don't need to implement this yourself. ripgrep already has a flag for this: -s/--smart-case:

Searches case insensitively if the pattern is all lowercase.
Search case sensitively otherwise.

This overrides the -s/--case-sensitive and -i/--ignore-case flags.

If you want this enabled by default, then you can either use a function (like you were trying), an alias (i.e., alias rg="rg -S") or create a configuration file and put it there.

Also, in the future, don't just say something "didn't work as expected." Please be sure to provide an example input along with its output and the output you expected. Otherwise, people have to guess what it is that you meant by "expected."