<s>
Roundup	B-Application
is	O
an	O
open-source	B-License
issue	B-Application
or	O
bug	B-Application
tracking	I-Application
system	I-Application
featuring	O
a	O
command-line	O
,	O
web	O
and	O
e-mail	O
interface	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
Python	B-Language
and	O
designed	O
to	O
be	O
highly	O
customizable	O
.	O
</s>
<s>
Roundup	B-Application
was	O
designed	O
by	O
Ka-Ping	O
Yee	O
for	O
the	O
Software	O
Carpentry	O
project	O
and	O
was	O
developed	O
from	O
2001	O
to	O
2016	O
under	O
the	O
direction	O
of	O
Richard	O
Jones	O
.	O
</s>
<s>
Since	O
then	O
,	O
it	O
has	O
been	O
developed	O
by	O
the	O
Roundup	B-Application
community	O
.	O
</s>
<s>
It	O
was	O
the	O
issue	B-Application
tracker	I-Application
for	O
the	O
Python	B-Language
programming	I-Language
language	I-Language
for	O
17	O
years	O
before	O
migrating	O
to	O
GitHub	B-Application
.	O
</s>
<s>
It	O
was	O
once	O
described	O
as	O
"	O
like	O
Bugzilla	B-Application
without	O
the	O
six	O
years	O
of	O
training	O
,	O
or	O
RT	B-Language
without	O
that	O
tedious	O
MySQL	B-Application
rubbish.	O
"	O
</s>
<s>
The	O
standard	O
configuration	O
of	O
Roundup	B-Application
features	O
:	O
</s>
<s>
Roundup	B-Application
supports	O
several	O
web	O
backends	O
.	O
</s>
<s>
It	O
can	O
be	O
run	O
standalone	B-General_Concept
,	O
as	O
a	O
background	O
daemon	B-Operating_System
process	I-Operating_System
,	O
as	O
a	O
CGI	B-Language
script	I-Language
or	O
as	O
WSGI	B-Language
application	O
.	O
</s>
<s>
Roundup	B-Application
is	O
customized	O
by	O
changing	O
the	O
contents	O
of	O
the	O
tracker	O
instance	O
directory	O
:	O
</s>
<s>
new	O
attributes	O
)	O
,	O
the	O
tables	B-Application
of	O
the	O
underlying	O
RDBS	O
are	O
altered	O
accordingly	O
.	O
</s>
<s>
Roundup	B-Application
uses	O
the	O
Template	B-Language
Attribute	I-Language
Language	I-Language
(	O
TAL	B-Language
)	O
to	O
create	O
HTML	B-Language
or	O
XHTML	B-Language
output	O
.	O
</s>
<s>
Version	O
1.5.0	O
adds	O
experimental	O
support	O
for	O
alternative	O
template	O
engines	O
,	O
such	O
as	O
Jinja2	B-Language
.	O
</s>
<s>
Roundup	B-Application
automatically	O
chooses	O
template	O
based	O
on	O
class	O
name	O
requested	O
from	O
URL	O
.	O
</s>
<s>
_generic.index.html	O
,	O
which	O
allows	O
(	O
authorized	O
)	O
users	O
to	O
change	O
the	O
objects	O
of	O
all	O
classes	O
which	O
lack	O
an	O
own	O
index	O
template	O
.	O
</s>
<s>
When	O
an	O
"	O
issue123	O
"	O
is	O
requested	O
,	O
this	O
designator	O
is	O
split	O
in	O
the	O
issue	B-Application
class	O
and	O
the	O
id	O
"	O
123	O
"	O
.	O
</s>
<s>
By	O
default	O
an	O
"	O
item	O
"	O
template	O
is	O
chosen	O
:	O
First	O
,	O
an	O
issue.item.html	O
template	O
file	O
is	O
looked	O
for	O
;	O
if	O
it	O
ca	O
n't	O
be	O
found	O
,	O
_generic.item.html	O
is	O
used	O
as	O
a	O
fallback	O
option	O
.	O
</s>
<s>
Many	O
Roundup	B-Application
functions	O
,	O
including	O
some	O
of	O
the	O
standard	O
functionality	O
,	O
are	O
implemented	O
using	O
so-called	O
detectors	O
,	O
which	O
are	O
located	O
in	O
the	O
"	O
detectors	O
"	O
sub-directory	O
of	O
the	O
tracker	O
instance	O
.	O
</s>
<s>
They	O
are	O
Python	B-Language
subroutines	O
which	O
have	O
access	O
to	O
the	O
object	O
to	O
change	O
(	O
if	O
already	O
created	O
)	O
and	O
the	O
requested	O
attribute	O
changes	O
.	O
</s>
<s>
Auditors	O
are	O
used	O
primarily	O
for	O
several	O
automatic	O
changes	O
(	O
in	O
the	O
standard	O
configuration	O
,	O
the	O
assignedto	O
user	O
is	O
automatically	O
added	O
to	O
the	O
nosy	O
list	O
of	O
the	O
issue	B-Application
)	O
,	O
and	O
to	O
refuse	O
un-allowed	O
changes	O
;	O
reactors	O
are	O
executed	O
thereafter	O
and	O
used	O
e.g.	O
</s>
<s>
for	O
the	O
e-mail	O
notification	O
feature	O
,	O
sending	O
notification	O
mails	O
to	O
all	O
users	O
interested	O
in	O
a	O
certain	O
issue	B-Application
when	O
a	O
comment	O
is	O
added	O
to	O
it	O
.	O
</s>
<s>
The	O
instance	O
subdirectory	O
"	O
extensions	O
"	O
can	O
hold	O
additional	O
files	O
which	O
are	O
needed	O
for	O
extended	O
functionalities	O
which	O
ca	O
n't	O
(	O
conveniently	O
)	O
be	O
done	O
with	O
TAL	B-Language
;	O
even	O
totally	O
new	O
actions	O
are	O
possible	O
.	O
</s>
