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Tue May 4 22:16:46 CEST 2010 · https://mail.python.org/pipermail/python-dev/2010-May/099933.html

On Tue, May 4, 2010 at 08:27, Zvezdan Petkovic <zvezdan at zope.com> wrote:

> On May 4, 2010, at 8:41 AM, Antoine Pitrou wrote:
> > I think we should reindent all 3 branches. Most of the work can probably
> be scripted (str.replace("\t", " " * 4)), and then a visual pass is
> necessary to fix vertical alignments and the like.
>
> >
> > I think we should reindent all 3 branches. Most of the work can probably
> be scripted (str.replace("\t", " " * 4)), and then a visual pass is
> necessary to fix vertical alignments and the like.
>
> Is it really that simple?
>
> People often do the following:
>
> - use tabs inside strings ("\t" should be used instead);
> - use tabs for alignment of inline comments on the right side;
> - mix tabs and spaces for indentation whitespace (continuation lines);
> - use tabs for alignment inside comments.
>
> A simple replacement of a tab with 4 spaces as you propose does not work
>  on such a code.
>
> To do it properly, you may end up reinventing `indent` (UNIX program).
>
> What if there was a set of `indent` flags defined for PEP-7?
> It would be a nice tool to check whether a new code complies.
>

`make patchcheck` already does this for Python code. Adding to the command
to handle C code wouldn't be hard.

-Brett

>
> However, running `indent` on an existing code would probably cause
> non-whitespace changes too as it rearranges the comments and code.
>
> I'm afraid that any other kind of "script + visual pass + post-edit" would
> incur similar changes if done properly (only more tedious).
>
> So, the question is what bothers developers more:
>
> - old C files with tab indentation, or
> - a lot of changes in version control to fix them?
>
> Both?
> :-)
>
>        Zvezdan
>
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