On 10 févr. 2014, at 20:16, Carl Meyer <c...@oddbird.net> wrote:
> I've proposed it before, and not in jest. Though perhaps not fully
> seriously either, as full seriousness would mean supplying a patch.
I've heard an ex-BDFL accepting the idea. The other ex-BDFL was there and he
didn't throw the first one through the window. Hence, the idea is accepted ;-)
I would do it if I had the time.
(As a full-time employee and father, my time isn't exchangeable for money.)
The MVP would look like this:
1) Design a convention to tell DTL templates apart from Jinja2 templates. My
favorite option is {# syntax: django #} or {# syntax: jinja2 #} in the first
line of the file. Using a file extension would work too. For files that do not
follow the convention, Django would default to DTL for two releases and then
to Jinja2. Let the bikeshed begin ;-)
2) Convert all built-in templates Jinja2. Provide suitable replacements for
template filters and tags we care about. This is a great opportunity to remove
some historical cruft like the add filter.
3) Update various bits of template-related infrastructure appropriately. Given
than jingo has less than 500 LoC excluding tests, and that Django's Template
abstraction is very straightforward, I'm cautiously optimistic.
This is a great opportunity to improve the pluggability of the template engine.
If we do a good job, it will be possible to turn the legacy DTL into a separate
project. We may have to make it less stateful to get there, maybe building on
Christopher Medrela's patches (#17093).
I have only one significant concern. Jinja2 is still a one-man-project [1] and
that man has taken a public stance on Python 3 that is at odds with Django's.
It's often misinterpreted as "Python 3 sucks" after a cursory reading.
That said, I'm pretty sure that Jinja2 is more robust that the DTL, even under
Python 3. I'm only worried about the PR. Whether we like it or not, software
needs PR. I don't want to have to answer ridiculous comments such as "Look,
Django is migrating to a template language anchored in Python's past!"
[1] https://github.com/mitsuhiko/jinja2/graphs/contributors
--
Aymeric.
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