Re: [PATCH] t7800 readlink not found

> Torsten Bögershausen <tboegi@web.de> writes:
>
>>> diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
>>> index 7ce4cd7..905035c 100755
>>> --- a/t/t7800-difftool.sh
>>> +++ b/t/t7800-difftool.sh
>>> @@ -446,7 +446,7 @@ write_script .git/CHECK_SYMLINKS <<\EOF
>>>   for f in file file2 sub/sub
>>>   do
>>>      echo "$f"
>>> -    readlink "$2/$f"
>>> +    ls -ld "$2/$f" | sed -e 's/.* -> //'
>>>   done >actual
>>>   EOF
>>>
>> I don't know how portable #ls -ld" really is.
>
> The parts with mode bits, nlinks, uid, gid, size, and date part do
> have some variations.  For example, we have been burned on ACL
> enabled systems having some funny suffix after the usual mode bits
> stuff.
>
> However, as far as this test is concerned, I do not think "how
> portable is the output from ls -ld" is an especially relevant
> question.  None of the things we expect early in the output (the
> fields I enumerated in the previous paragraph) would contain " -> ".
> And we know that we do not use a filename that has " -> " (or "->")
> as a substring in our tests.
>
> We don't have to use readlink, even on platforms where we do have
> readlink.  Building the conditional to be checked at runtime and
> providing a shell function read_link that uses "ls -ld | sed" or
> "readlink" depending on the runtime check is wasteful.
>