Fish shell: test: Missing argument at index 2

问题

I have the following function:

function is_file
  set file $argv[1]

  if test ‐f $file
    return 0
  else
    return 1
  end
end

However when calling it:

is_file ~/.vimrc

I get:

test: Missing argument at index 2

What am I missing?

回答1:

The problem is the hyphen in the line

    if test ‐f $file

It is encoded as a Unicode hyphen U+2010, but it should be the ASCII hyphen-minus (0x2D) which is Unicode character U+002D. If I delete the hyphen and retype it myself, it works fine for me.

By the way, this function could be written more concisely:

function is_file
    test -f $argv[1]
end

来源：https://stackoverflow.com/questions/23483919/fish-shell-test-missing-argument-at-index-2