svn diff with stripping of code comments

[John Pye <jo...@curioussymbols.com>]

Hi all

Subversion supports calling an external script to perform diffs when
using "svn diff".

I'd like to use this facility to find non-trivial changes in a code
repository where a lot of reformatting and comment changes have been
made. Has anyone got a tool that strips code comments and normalises
whitespace before performing a diff?

I've got a preliminary python script which I'll attach here. It's buggy,
and doesn't play nice with svn, so I'm hoping someone else might have
built something better already.

I use a wrapper script as suggested in
http://svnbook.red-bean.com/en/1.2/svn.advanced.externaldifftools.html
didn't manage to make it work.

Cheers
JP

Re: svn diff with stripping of code comments

[John Pye <jo...@curioussymbols.com>]

This works now, so I'm posting my revised version.

Strangely, on FC4, this script fails intermittently, producing no output
and no errors/exceptions. But when it it works, it works fine. I'd love
to know what the bug is, if anyone can see it.

Usage: svn diff --diff-cmd /path/to/stripdiff -r 950 slv9.c

(Note that you can't use ~ expansion in the path to stripdiff, eg
~/john/stripdiff -- it will fail with error 255)

Cheers
JP

John Pye wrote:

>Hi all
>
>Subversion supports calling an external script to perform diffs when
>using "svn diff".
>
>I'd like to use this facility to find non-trivial changes in a code
>repository where a lot of reformatting and comment changes have been
>made. Has anyone got a tool that strips code comments and normalises
>whitespace before performing a diff?
>
>I've got a preliminary python script which I'll attach here. It's buggy,
>and doesn't play nice with svn, so I'm hoping someone else might have
>built something better already.
>
>I use a wrapper script as suggested in
>http://svnbook.red-bean.com/en/1.2/svn.advanced.externaldifftools.html
>didn't manage to make it work.
>
>Cheers
>JP
>  
>