Add buildgen to an arbitrary pants project

patch.diff

diff --git a/.gitignore b/.gitignore
index a61ace7..0ced64a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@
 .#*
 .DS_Store
 .artifact_cache
+.buildgen_timestamp
 .cache
 .classpath
 .coverage
diff --git a/3rdparty/python/requirements.txt b/3rdparty/python/requirements.txt
index 8ba4cfd..f2535b9 100644
--- a/3rdparty/python/requirements.txt
+++ b/3rdparty/python/requirements.txt
@@ -1,4 +1,10 @@
+fsqio.pants.contrib.buildgen.core==1.0.0
+fsqio.pants.contrib.buildgen.jvm==1.0.0
+fsqio.pants.contrib.buildgen.python==1.0.0
 psycopg2==2.5.3
 pymongo==2.8
 requests==2.3.0
 requests-futures==0.9.4
+twitter.common.collections==0.3.3
+twitter.common.dirutil==0.3.3
+
diff --git a/BUILD.opensource b/BUILD.opensource
new file mode 100644
index 0000000..791ced3
--- /dev/null
+++ b/BUILD.opensource
@@ -0,0 +1,22 @@
+# Copyright 2016 Foursquare Labs Inc. All Rights Reserved.
+
+
+def sjar(org, name, rev, url=None):
+  scala_jar_version = '2.10'
+  return jar(org = org, name = '%s_%s' % (name, scala_jar_version), rev = rev, url = url)
+
+
+jar_library(
+name = 'buildgen-emit-used-symbols',
+ jars = [
+   sjar(org = 'io.fsq', name = 'buildgen-emit-used-symbols', rev = '1.1.0'),
+ ]
+)
+
+
+jar_library(
+ name = 'buildgen-emit-exported-symbols',
+ jars = [
+   sjar(org = 'io.fsq', name = 'buildgen-emit-exported-symbols', rev = '1.1.0'),
+ ]
+)
diff --git a/pants.ini b/pants.ini
index fd658eb..10779be 100644
--- a/pants.ini
+++ b/pants.ini
@@ -14,6 +14,9 @@ pythonpath: [
   ]

 backend_packages: [
+    "pants.contrib.buildgen.core",
+    "pants.contrib.buildgen.jvm",
+    "pants.contrib.buildgen.python",
     'fsqio.pants',
   ]

@@ -231,6 +235,67 @@ repos = {
 version: 2.10


+[buildgen]
+source_dirs: [
+  'src',
+  '3rdparty',
+  ]
+
+test_dirs: [
+  'test',
+  ]
+
+target_whitelist: [
+      'java_tests',
+      'junit_tests',
+      'python_library',
+      'python_tests',
+      'scala_library',
+      'scalac_plugin',
+  ]
+
+managed_dependency_aliases: [
+      'jar_library',
+      'python_library',
+      'python_requirement_library',
+      'scala_library',
+  ]
+
+required_products: [
+    'concrete_target_to_derivatives',
+    'java',
+    'java_source_to_exported_symbols',
+    'python',
+    'python_source_to_exported_symbols',
+    'scala',
+    'scala_source_to_exported_symbols',
+    'scala_source_to_used_symbols',
+    'source_to_addresses_mapper',
+  ]
+
+
+
+[buildgen.python]
+first_party_packages = [
+  'fsqio',
+  ]
+
+ignored_prefixes: [
+  'pants',
+  'pex',
+  ]
+
+
 [tag]
 # NOTE: This is overrided internally - for use with Fsq.io only.
 by_prefix:  {