Issue 3674 - Add a hg hook that references commits in issues

sitescripts/hg/template/issue_commit_comment.tmpl

+{% if changes|length > 1 -%}
+Some commits referencing this issue have landed:
+{%- else -%}
+A commit referencing this issue has landed:
+{%- endif %}
+{%- for change in changes %}
+{% if loop.length > 1 %}- {% endif -%}
+https://hg.adblockplus.org/{{repository_name}}/rev/{{change.hex()|truncate(12, True, "")}}

[Felix Dahlke, 2016/02/22 20:09:50]

I'm not particularly proud of this one but:

1. To my astonishment, I haven't found a nicer way of cutting off a string in
Jinja2.
2. The template is a lot more flexible if we just pass in a list of real change
context objects.

Alternatively, I could simply pass in a list of readily truncated changeset IDs.
Seems a bit wrong since then I'm moving view logic back into the hook script,
but it would be more readable. Can you think of better options? If not, which of
these two do you think is better?

[Wladimir Palant, 2016/02/23 10:41:31]

How about:

{{change.hex()[:12]}}

;)

[Felix Dahlke, 2016/02/23 16:22:59]

Well I never, didn't occur to me for some reason to just try Python syntax here
:D Done.

+{%- endfor -%}