At 03:28 PM 9/11/2009 +0200, Martin v. Löwis wrote:
That's for compatibility with setuptools. When setuptools was parsing the original pages, it would follow all URLs.
This is not true; setuptools has never followed all URLs. It merely *parses* all URLs, in order to discover identifiable download links (i.e. links to archive files, executables, SVN checkouts, etc.)
It only follows explicit "home page" and "download" links, to do the same scanning for potential links. (In other words, for any given package, no more than three pages are scanned: the PyPI index page, the homepage, and the download URL, with the latter two only being read if they are present and aren't discoverable download links themselves.)
The complete API specification is here, including notes on what was done in earlier versions:
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