org-mode babel sh脚本+转义（？）〜主目录的char？

Question

I have this small sh script under org-mode babel:

#+NAME: testHomeDir 
#+BEGIN_SRC sh :var directory="./"
set -e
cd $directory
ls | head -5
#+END_SRC

Note: set -e is there to stop the script as soon as an error occurs.

The script works well with full path:

#+CALL: testHomeDir("/home/picaud/Temp")

 #+RESULTS: :RESULTS: current issues.pdf AnnotatedPDF Bitbucket compareScript.wls Data :END: 

However when used with ~ (my home directory) it does not work anymore:

#+CALL: testHomeDir("~/Temp")

I get the

sh: 4: cd: can't cd to ~/Temp

error message.

Please also note that

#+CALL: testHomeDir("\~/Temp")
#+CALL: testHomeDir("\\~/Temp")

do not work too.

I guess that the ~ character is escaped somewhere (in Emacs? in sh?)...

My question is: how to fix that?

Answer 1

The ~ is not being expanded by the shell because it is being set within Emacs and is the literal string '~'. In order to get the expansion you need to run it through eval:

directory=$(eval echo $directory)

before you try to use it.