function projectopen {
    local di_files=(*.xcworkspace */*.xcworkspace *.xcodeproj */*.xcodeproj)

    # open first exsit file
    ls -d -f -1 $di_files  2>/dev/null \
    | head -1 \
    | xargs open

I write a shell function to quick open xcworkspace in terminal. But when I declare di_files as a local var, then the function is broken, and log

projectopen:1: number expected

I use zsh on Mac OS. Why this happen and how to fix it?

  • how did you declare di_files? you shouldn't have any problems making your array variable local to the function – the_velour_fog Nov 25 '16 at 8:41
  • I update the function.@the_velour_fog – Karl Nov 25 '16 at 10:21
  • then I suspect there is something else going on and its probably that ls command. I would try removing or commenting out the ls command. then re-run your projectopen function defintion. I think you should find its ok. if so, then your could address the ls command – the_velour_fog Nov 25 '16 at 10:24

In older versions of zsh you cannot initialise an array with local (or typeset/declare) like that, you need to separate it, e.g.

local -a di_files # explicit array
di_files=( ... )

The feature to permit declaration and array assignment together was added in v5.1.

I believe the error you see is because zsh is treating the initialisation as scalar and () as a glob qualifier.

You can also probably replace your elaborate pipeline with the simpler

open "${di_files[1]}"

Finally, including handling for no matching files:

function projectopen {
  setopt local_options nullglob
  local di_files=(*.xcworkspace */*.xcworkspace *.xcodeproj */*.xcodeproj)

  # open first existing file
  [ -n "${di_files[1]}" ] && open "${di_files[1]}"

With the nullglob option each glob expansion which matches no files is replaced with an empty string (I suspect you may have nonomatch set, a related option).

  • Great answer. But ls also excluded none existed files for me, any improve to your suggestions. – Karl Nov 25 '16 at 15:01

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