[Cocci] sys.path for Python?

[Cocci] sys.path for Python?

[Peter Senna Tschudin]

Hi,

I'm writing a set of .cocci files that will use python. I'm making
some helper function that I want to include in multiple files. I'm
doing something like:

@initialize:python@
@@
from Common import *

which works fine, given spatch is called from the folder where
Commom.py is. If I move to the folder where I want to run spatch, and
try the same semantic patch it fails. The solution for now is:

@initialize:python@
@@
import sys
sys.path.append("/home/peter/devel/git/the-conference/devel/featureccinelle/cocci-files/")
from Common import *

So I ask:

- Can I access from Python the path to the semantic patch? Maybe I
could get that from the cmdline of spatch but that would be
complicated.

- Does it make sense to have a python command to extend the path to
append the folder where the semantic patch is in?

Thank you!


-- 
Peter

[Cocci] sys.path for Python?

[Luis R. Rodriguez]

On Fri, Jul 24, 2015 at 07:09:59PM +0200, Peter Senna Tschudin wrote:
> Hi,
> 
> I'm writing a set of .cocci files that will use python. I'm making
> some helper function that I want to include in multiple files. I'm
> doing something like:
> 
> @initialize:python@
> @@
> from Common import *
> 
> which works fine, given spatch is called from the folder where
> Commom.py is. If I move to the folder where I want to run spatch, and
> try the same semantic patch it fails. The solution for now is:
> 
> @initialize:python@
> @@
> import sys
> sys.path.append("/home/peter/devel/git/the-conference/devel/featureccinelle/cocci-files/")
> from Common import *
> 
> So I ask:
> 
> - Can I access from Python the path to the semantic patch? Maybe I
> could get that from the cmdline of spatch but that would be
> complicated.
> 
> - Does it make sense to have a python command to extend the path to
> append the folder where the semantic patch is in?

Can you try

source_dir = os.path.abspath(os.path.dirname(__file__))
sys.path.append(source_dir)

  Luis

[Cocci] sys.path for Python?

[SF Markus Elfring]

> sys.path.append("/home/peter/devel/git/the-conference/devel/featureccinelle/cocci-files/")
> from Common import *

Do you prefer to store such a string in your SmPL script
as a temporary workaround?

How do you think about to make the directory name configurable
by a corresponding variable?
Should other shell scripts control and adjust the desired source code
analysis eventually?

Regards,
Markus

[Cocci] sys.path for Python?

[Peter Senna Tschudin]

Hi Luis,

Thank you for the prompt reply.

> Can you try
>
> source_dir = os.path.abspath(os.path.dirname(__file__))
> sys.path.append(source_dir)

Looks like __file__  is not defined, but cocci.cocci_file contains the
path to the semantic patch, so:

source_dir = os.path.abspath(os.path.dirname(cocci.cocci_file))
sys.path.append(source_dir)

works perfectly fine! Thanks a lot!




-- 
Peter