2011/7/12 Michael Mulich <report@bugs.python.org>

>
> Michael Mulich <michael.mulich@gmail.com> added the comment:
>
> The wiki page has been edited to note what the develop command will
> write to the file system. I'll restate it here as well...
>
> The develop command writes three pieces of information to the filesystem:
>  1. It calls upon the build action(s) to build the package relative to
> the package's root directory.
>  2. It calls the [build|install]_distinfo action to write the
> .dist-info metadata inside the build directory. (see also Issue 12279)
>  3. It adds the build directory's path to a .pth file.
>

You are right, what you listed above are also the things done by the
'develop' command of my current implementation. In addition, as I replied
earlier, we can also add a .distinfo-link file  more than the .pth file.