Bug#913274: Incorrectly parsing whitespace in Sources.iter_paragraphs

[Stuart Prescott]

Control: tags -1 + patch

Dear Marcus & python-debian co-maintainers,

> > If other tools/libraries are more tolerant, including python-apt,
> > would it make sense for python-debian to be more tolerant when using
> > the in-built parser? In that case, the two parser implementations
> > would be more consistent.
> 
> The problem is that iter_paragraphs is used in situations where that
> construct should be a paragraph separator, such as in debian/control.
> 
> https://bugs.debian.org/715558   (and many duplicates)
> 
> Perhaps the internal parser needs a 'strict'ness parameter that controls
> this behaviour. I'll look at that next.

Some code that:

* allows the caller to explicitly say whether whitespace-only lines delimit 
paragraphs (`whitespace-separates-paragraphs`)

* implicitly sets `whitespace-separates-paragraphs=True` if called through 
generic Deb822.iter_paragraphs (the `debian/control` / wrap-and-sort case; 
#715558)

* implicitly sets `whitespace-separates-paragraphs=False` if called through 
specific Packages.iter_paragraphs or Sources.iter_paragraphs (the emulating 
python-apt case; #913274)

https://salsa.debian.org/python-debian-team/python-debian/merge_requests/9

Comments and reviews needed!

cheers
Stuart

-- 
Stuart Prescott    http://www.nanonanonano.net/   stuart at nanonanonano.net
Debian Developer   http://www.debian.org/         stuart at debian.org
GPG fingerprint    90E2 D2C1 AD14 6A1B 7EBB 891D BBC1 7EBB 1396 F2F7