鱼壳可以在if语句中进行通配符修饰吗？

Question

I'm having trouble understanding whether I can use wildcard globbing in an if statement in fish. This switch/case works as expected:

# correctly echos macOS on macOS
switch "$OSTYPE"
    case 'darwin*'
        echo 'macOS'
    case '*'
        echo 'not macOS'
end

However, I cannot get an if statement version of the same thing to work.

# doesn't work - prints 'not macOS' on macOS
if [ "$OSTYPE" = 'darwin*' ]
    echo 'macOS'
else
    echo 'not macOS'
end

In zsh/bash you can do something like this:

[[ $OSTYPE == darwin* ]] && echo 'macOS' || echo 'not macOS'

Or, more verbosely,

if [[ $OSTYPE == darwin* ]]
  then echo 'macOS'
  else echo 'not macOS'
fi

My question is, does fish support wildcard globbing against a variable in if statements? Am I doing this wrong? I cannot find an example in the fish docs that tells me either way.

NOTE : I'm not asking about checking $OSTYPE in fish. I know there are better ways to do that . My question is limited strictly to whether it is possible to do wildcard globbing in an if statement in fish.

Answer 1

No.

Use switch like you said, or the string builtin like

if string match -q 'darwin*' -- "$OSTYPE"

The if isn't important - the command you are running in your example is [ , which is an alternative name for test , which is a builtin with documentation at http://fishshell.com/docs/current/commands.html#test (or man test or help test ).