<s>
Buildr	B-Application
was	O
an	O
open-source	B-Application
build	B-Application
system	I-Application
mainly	O
intended	O
to	O
build	O
Java	B-Device
applications	O
.	O
</s>
<s>
It	O
gave	O
the	O
developer	O
a	O
full-blown	O
scripting	O
language	O
(	O
Ruby	B-Language
)	O
while	O
writing	O
their	O
build	O
scripts	O
,	O
which	O
are	O
usually	O
missing	O
in	O
XML-based	O
building	O
environments	O
such	O
as	O
Apache	B-Application
Ant	I-Application
or	O
Apache	B-Language
Maven	I-Language
.	O
</s>
<s>
The	O
Apache	B-Application
Buildr	I-Application
project	O
has	O
been	O
retired	O
in	O
July	O
2022	O
.	O
</s>
<s>
Buildr	B-Application
is	O
based	O
on	O
Ruby	B-Language
's	O
build	B-Application
system	I-Application
Rake	B-Application
,	O
and	O
uses	O
Ruby	B-Language
as	O
a	O
scripting	O
language	O
.	O
</s>
<s>
It	O
uses	O
several	O
project	O
automation	O
idioms	O
from	O
Maven	B-Language
like	O
automated	O
artifact	O
management	O
(	O
Buildr	B-Application
is	O
out-of-box	B-General_Concept
compatible	O
with	O
Maven	B-Language
's	O
repositories	O
)	O
.	O
</s>
<s>
As	O
opposed	O
to	O
the	O
more	O
imperative	O
style	O
of	O
build	B-Application
systems	I-Application
like	O
Ant	B-Application
,	O
Buildr	B-Application
takes	O
a	O
more	O
declarative	B-Language
approach	O
in	O
describing	O
the	O
project	O
automation	O
logic	O
(	O
similarly	O
to	O
Maven	B-Language
)	O
.	O
</s>
<s>
Though	O
Buildr	B-Application
's	O
general	O
philosophy	O
is	O
similar	O
to	O
Maven	B-Language
,	O
it	O
uses	O
Ruby	B-Language
's	O
scripting	O
possibilities	O
to	O
provide	O
a	O
more	O
flexible	O
and	O
customizable	O
programming	O
model	O
.	O
</s>
<s>
The	O
user	O
writes	O
a	O
Ruby	B-Language
build	O
script	O
,	O
declaring	O
a	O
project	O
,	O
its	O
sub-projects	O
,	O
artifacts	O
,	O
dependencies	O
,	O
packaging	O
rules	O
,	O
etc	O
.	O
</s>
<s>
Hooks	O
are	O
provided	O
to	O
execute	O
custom	O
Ruby	B-Language
code	O
before	O
or	O
after	O
the	O
standard	O
targets	O
,	O
allowing	O
the	O
user	O
to	O
comfortably	O
override	O
any	O
defaults	O
and	O
further	O
specify	O
the	O
behavior	O
of	O
the	O
standard	O
targets	O
.	O
</s>
<s>
While	O
being	O
mainly	O
designed	O
for	O
Java	B-Device
,	O
Buildr	B-Application
also	O
knows	O
how	O
to	O
invoke	O
compilers	O
for	O
Groovy	B-Application
or	O
Scala	B-Application
.	O
</s>
<s>
It	O
is	O
also	O
easily	O
extendible	O
with	O
any	O
custom	O
tasks	O
to	O
invoke	O
any	O
third	O
compiler	O
,	O
making	O
it	O
a	O
universal	O
,	O
general-purpose	O
build	B-Application
system	I-Application
.	O
</s>
<s>
As	O
compared	O
with	O
writing	O
custom	O
plug-ins	O
for	O
Ant	B-Application
,	O
Ruby	B-Language
's	O
flexibility	O
and	O
rich	O
library	O
make	O
it	O
easier	O
and	O
quicker	O
to	O
extend	O
Buildr	B-Application
in	O
any	O
desired	O
way	O
.	O
</s>
<s>
Buildr	B-Application
also	O
comes	O
with	O
out-of-box	B-General_Concept
support	O
technologies	O
like	O
Cobertura	O
,	O
Emma	O
,	O
JUnit	B-Language
,	O
TestNG	B-Language
,	O
JBehave	O
,	O
JMock	O
.	O
</s>
<s>
Integration	O
with	O
Ant	B-Application
is	O
also	O
provided	O
.	O
</s>
