<s>
Mantis	B-Application
Bug	I-Application
Tracker	I-Application
is	O
a	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
,	O
web-based	B-Application
bug	B-Application
tracking	I-Application
system	I-Application
.	O
</s>
<s>
The	O
most	O
common	O
use	O
of	O
MantisBT	B-Application
is	O
to	O
track	O
software	B-Error_Name
defects	I-Error_Name
.	O
</s>
<s>
However	O
,	O
MantisBT	B-Application
is	O
often	O
configured	O
by	O
users	O
to	O
serve	O
as	O
a	O
more	O
generic	O
issue	B-Application
tracking	I-Application
system	I-Application
and	O
project	B-Application
management	I-Application
tool	I-Application
.	O
</s>
<s>
The	O
name	O
Mantis	O
and	O
the	O
logo	B-Device
of	O
the	O
project	O
refer	O
to	O
the	O
insect	O
family	O
Mantidae	O
,	O
known	O
for	O
the	O
tracking	O
of	O
and	O
feeding	O
on	O
other	O
insects	O
,	O
colloquially	O
referred	O
to	O
as	O
"	O
bugs	B-Error_Name
"	O
.	O
</s>
<s>
The	O
name	O
of	O
the	O
project	O
is	O
typically	O
abbreviated	O
to	O
either	O
MantisBT	B-Application
or	O
just	O
Mantis	O
.	O
</s>
<s>
Kenzaburo	O
Ito	O
started	O
development	O
of	O
the	O
Mantis	O
Bug	B-Application
Tracking	I-Application
project	O
in	O
2000	O
.	O
</s>
<s>
In	O
November	O
2008	O
,	O
after	O
a	O
long	O
discussion	O
,	O
the	O
project	O
switched	O
from	O
using	O
the	O
Subversion	B-Application
revision	B-Architecture
control	I-Architecture
tool	O
to	O
Git	B-Application
,	O
a	O
distributed	O
revision	B-Architecture
control	I-Architecture
tool	O
.	O
</s>
<s>
In	O
July	O
2012	O
,	O
the	O
MantisBT	B-Application
organization	O
on	O
GitHub	B-Application
became	O
the	O
official	O
repository	O
for	O
the	O
Project	O
's	O
source	O
code	O
.	O
</s>
<s>
An	O
event-driven	B-Application
plug-in	B-Application
system	O
was	O
introduced	O
with	O
the	O
release	O
of	O
1.2.0	O
.	O
</s>
<s>
This	O
plug-in	B-Application
system	O
allows	O
extension	O
of	O
MantisBT	B-Application
through	O
both	O
officially	O
maintained	O
and	O
third	O
party	O
plug-ins	B-Application
.	O
</s>
<s>
As	O
of	O
November	O
2013	O
,	O
there	O
are	O
over	O
50	O
plug-ins	B-Application
available	O
on	O
the	O
MantisBT-plugins	O
organization	O
on	O
GitHub	B-Application
.	O
</s>
<s>
Prior	O
to	O
version	O
1.2.0	O
,	O
a	O
third	O
party	O
plug-in	B-Application
system	O
created	O
by	O
Vincent	O
Debout	O
was	O
available	O
to	O
users	O
along	O
with	O
a	O
variety	O
of	O
different	O
plug-ins	B-Application
.	O
</s>
<s>
This	O
system	O
was	O
not	O
officially	O
supported	O
by	O
the	O
MantisBT	B-Application
project	O
and	O
is	O
incompatible	O
with	O
MantisBT	B-Application
1.2.0	O
and	O
later	O
.	O
</s>
<s>
MantisBT	B-Application
supports	O
the	O
sending	O
of	O
e-mail	O
notifications	O
upon	O
changes	O
being	O
made	O
to	O
issues	O
in	O
the	O
system	O
.	O
</s>
<s>
Additionally	O
,	O
MantisBT	B-Application
has	O
integration	O
with	O
Twitter	B-Application
via	O
a	O
plugin	B-Application
,	O
to	O
allow	O
a	O
notification	O
to	O
be	O
tweeted	O
when	O
an	O
issue	O
is	O
resolved	O
.	O
</s>
<s>
Via	O
MantisBT	B-Application
's	O
event-driven	B-Application
plug-in	B-Application
system	O
,	O
it	O
is	O
possible	O
to	O
extend	O
the	O
built	O
in	O
notification	O
support	O
to	O
run	O
advanced	O
scripts	O
that	O
perform	O
additional	O
notification	O
actions	O
(	O
such	O
as	O
sending	O
SMS	B-Device
messages	O
or	O
updating	O
statuses	O
in	O
external	O
project	B-Application
management	I-Application
systems	I-Application
)	O
.	O
</s>
<s>
Versions	O
of	O
MantisBT	B-Application
prior	O
to	O
1.2.0	O
allowed	O
for	O
limited	O
integration	O
with	O
the	O
CVS	B-Application
revision	B-Architecture
control	I-Architecture
system	I-Architecture
.	O
</s>
<s>
With	O
the	O
introduction	O
of	O
plug-in	B-Application
capabilities	O
in	O
MantisBT	B-Application
1.2.0	O
,	O
revision	B-Architecture
control	I-Architecture
integration	O
was	O
redeveloped	O
by	O
Amethyst	O
Reese	O
in	O
the	O
SourceIntegration	O
plugin	B-Application
.	O
</s>
<s>
The	O
initial	O
release	O
of	O
the	O
SourceIntegration	O
plugin	B-Application
supported	O
GitHub	B-Application
,	O
GitWeb	O
,	O
SourceForge	B-Application
and	O
WebSVN	O
.	O
</s>
<s>
Over	O
time	O
,	O
two	O
additional	O
modules	O
were	O
added	O
and	O
as	O
of	O
November	O
2013	O
,	O
source	O
integration	O
is	O
supported	O
for	O
the	O
following	O
revision	B-Architecture
control	I-Architecture
tools	O
and	O
web-based	B-Application
providers	O
:	O
</s>
<s>
Upon	O
committing	B-Language
changesets	B-Protocol
to	O
a	O
source	O
code	O
repository	O
,	O
post-commit	O
hooks	O
within	O
Git	B-Application
or	O
Subversion	B-Application
can	O
be	O
configured	O
to	O
automatically	O
notify	O
MantisBT	B-Application
that	O
changes	O
have	O
been	O
made	O
to	O
the	O
repository	O
.	O
</s>
<s>
GitHub	B-Application
is	O
also	O
capable	O
of	O
remotely	O
notifying	O
a	O
MantisBT	B-Application
installation	O
of	O
changes	O
to	O
a	O
source	O
code	O
repository	O
.	O
</s>
<s>
Another	O
technique	O
used	O
for	O
integrating	O
MantisBT	B-Application
with	O
web-based	B-Application
source	O
code	O
hosting	O
providers	O
is	O
the	O
use	O
of	O
a	O
job	B-General_Concept
scheduler	I-General_Concept
such	O
as	O
cron	B-General_Concept
to	O
manually	O
check	O
for	O
changes	O
to	O
a	O
repository	O
every	O
few	O
minutes	O
,	O
reporting	O
any	O
changes	O
back	O
to	O
MantisBT	B-Application
.	O
</s>
<s>
SourceIntegration	O
allows	O
for	O
issues	O
within	O
MantisBT	B-Application
to	O
be	O
automatically	O
resolved	O
when	O
a	O
changeset	B-Protocol
message	O
contains	O
special	O
strings	O
such	O
as	O
"	O
Fixes	O
#12345	O
"	O
,	O
which	O
are	O
configurable	O
using	O
regular	B-Language
expressions	I-Language
.	O
</s>
<s>
This	O
also	O
allows	O
for	O
relationships	B-Architecture
to	O
be	O
automatically	O
created	O
between	O
changesets	B-Protocol
and	O
corresponding	O
issues	O
recorded	O
in	O
MantisBT	B-Application
.	O
</s>
<s>
Multiple	O
issue	O
IDs	O
can	O
be	O
specified	O
in	O
a	O
single	O
changeset	B-Protocol
message	O
,	O
although	O
this	O
is	O
commonly	O
discouraged	O
as	O
it	O
indicates	O
the	O
changeset	B-Protocol
does	O
n't	O
have	O
a	O
single	O
,	O
clear	O
and	O
logical	O
purpose	O
.	O
</s>
<s>
In	O
addition	O
to	O
the	O
features	O
mentioned	O
above	O
,	O
MantisBT	B-Application
also	O
has	O
support	O
for	O
:	O
</s>
<s>
Localised	O
dozens	O
of	O
languages	O
on	O
translatewiki.net	B-Language
.	O
</s>
<s>
MantisBT	B-Application
is	O
mainly	O
written	O
in	O
PHP	B-Application
and	O
uses	O
SQL	B-Language
to	O
interface	O
with	O
databases	O
.	O
</s>
<s>
The	O
web-based	B-Application
user	B-Application
interface	I-Application
of	O
MantisBT	B-Application
is	O
written	O
using	O
HTML	B-Language
which	O
is	O
styled	O
and	O
presented	O
using	O
CSS	B-Language
.	O
</s>
<s>
The	O
UI	O
also	O
uses	O
the	O
jQuery	B-Language
client-side	O
JavaScript	O
library	B-Library
to	O
provide	O
optional	O
features	O
such	O
as	O
Ajax	B-General_Concept
and	O
JSON	B-General_Concept
powered	O
dynamic	O
page	O
content	O
.	O
</s>
<s>
Development	O
tools	O
and	O
build	O
scripts	O
are	O
written	O
predominantly	O
in	O
Python	B-Language
with	O
some	O
Shell	B-Language
script	I-Language
and	O
PHP	B-Application
.	O
</s>
<s>
MantisBT	B-Application
's	O
codebase	B-General_Concept
dates	O
back	O
to	O
a	O
time	O
when	O
PHP	B-Application
's	O
support	O
for	O
object-oriented	B-Language
programming	I-Language
principles	I-Language
was	O
in	O
its	O
infancy	O
.	O
</s>
<s>
As	O
of	O
version	O
1.2.0	O
,	O
the	O
majority	O
of	O
the	O
MantisBT	B-Application
codebase	B-General_Concept
still	O
uses	O
procedural	B-Application
programming	I-Application
principles	I-Application
,	O
however	O
some	O
sections	O
have	O
been	O
converted	O
to	O
make	O
use	O
of	O
PHP	B-Application
5	O
's	O
new	O
object	O
model	O
.	O
</s>
<s>
Data	O
is	O
stored	O
in	O
a	O
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
by	O
means	O
of	O
the	O
ADOdb	B-Language
database	O
abstraction	B-Application
library	B-Library
.	O
</s>
<s>
MantisBT	B-Application
supports	O
MySQL	B-Application
,	O
MariaDB	B-Application
and	O
PostgreSQL	B-Application
.	O
</s>
<s>
It	O
has	O
experimental	O
support	O
for	O
Microsoft	B-Application
SQL	I-Application
and	O
Oracle	B-General_Concept
.	O
</s>
<s>
MantisBT	B-Application
maintains	O
a	O
database	O
upgrade	O
path	O
between	O
versions	O
by	O
modifying	O
the	O
database	B-Application
schema	I-Application
incrementally	O
.	O
</s>
<s>
During	O
the	O
installation	O
of	O
MantisBT	B-Application
,	O
database	B-Application
schema	I-Application
modifications	O
are	O
replayed	O
all	O
the	O
way	O
back	O
from	O
early	O
versions	O
of	O
MantisBT	B-Application
to	O
reach	O
the	O
latest	O
state	O
.	O
</s>
<s>
MantisBT	B-Application
requires	O
a	O
configured	O
web	B-Application
server	I-Application
,	O
the	O
PHP	B-Application
programming	I-Application
language	I-Application
interpreter	O
and	O
a	O
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
supported	O
by	O
MantisBT	B-Application
and	O
ADOdb	B-Language
.	O
</s>
<s>
As	O
of	O
June	O
2022	O
,	O
the	O
stable	O
branch	O
of	O
MantisBT	B-Application
requires	O
PHP	B-Application
7.0	O
or	O
later	O
.	O
</s>
<s>
Several	O
PHP	B-Application
extensions	B-Application
are	O
required	O
to	O
enable	O
specific	O
functionality	O
or	O
for	O
performance	O
reasons	O
;	O
the	O
extension	O
for	O
the	O
RDBMS	O
being	O
used	O
(	O
i.e.	O
</s>
<s>
MantisBT	B-Application
bundles	O
a	O
number	O
of	O
dependencies	O
with	O
each	O
release	O
including	O
:	O
</s>
<s>
For	O
drawing	O
graphs	O
of	O
relationships	B-Architecture
between	O
issues	O
,	O
GraphViz	B-Language
is	O
required	O
.	O
</s>
<s>
MantisBT	B-Application
also	O
has	O
an	O
alternative	O
dependency	O
upon	O
the	O
commercial	O
JpGraph	O
graphics	O
library	B-Library
for	O
plotting	B-Application
of	O
statistics	O
.	O
</s>
