[winswitch] readlink (via python realpath)

Antoine Martin antoine at devloop.org.uk
Thu Aug 14 13:01:16 BST 2014

On 14/08/14 15:07, Scott-Fleming, Ian wrote:
> A - 
>>> read link properly resolves symbolic links to the true pathname.  It
>>> also gets the full pathname if the file is found via the search path. 
>> That doesn't work when used directly:
> Ouch. 
> indeed.  you are right.  hadn’t tried it on a regular file.  (read
> link -f works properly in regular linux for any pathname…why can’t Mac
> OS X do the same?)  There doesn’t seem to be a direct  OS X bash
> solution equivalent to linux’s “read link -f”.
> (And you’re right about needing quotes for filenames with spaces.
>  always forget that people who don’t know better put spaces in their
> filenames…)
> The best I’ve found via google is the following.  Relies on python
> being present, but your package requires python, so should be valid in
> your script:
That's a bit different though, we ship our own python and this script is
required to find it..
> true_name=$(python -c 'import os,sys;print
> os.path.realpath(sys.argv[1])' "$0")
> exe_name=$( basename $true_name)
> full_path=$(dirname $true_name )
In any case, I would much rather not have to rely on finding and running
python, and use shell if-else instead.
Surely we don't need a python interpreter to figure out which path we're at?
I know this OSX, but come on!

> BTW, if you stay with your solution:   “pwd -P” might be preferable to
> “pwd”  (-P canonicalizes the path to cur dir if it contains any
> symbolic links, but won’t canonicalize the filename if its a link). 
That bit is now merged:


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