add fbcode_builder configs for folly

Summary: Add fbcode_builder configs for folly to folly/build.

Reviewed By: yfeldblum

Differential Revision: D6700053

fbshipit-source-id: 3b9e974f727e7b7815580d8a12a6adfc3b529866

build/README.md

+This directory contains `fbcode_builder` configuration and scripts.
+Note that the `folly/build` subdirectory also contains some additional build
+scripts for other platforms.
+
+## Building using `fbcode_builder`
+
+`fbcode_builder` is a small tool shared by several Facebook projects to help
+drive continuous integration builds for our open source repositories.  Its
+files are in `folly/fbcode_builder` (on Github) or in
+`fbcode/opensource/fbcode_builder` (inside Facebook's repo).
+
+Start with the READMEs in the `fbcode_builder` directory.
+
+`./fbcode_builder_config.py` contains the project-specific configuration.

build/fbcode_builder_config.py

+#!/usr/bin/env python
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+'fbcode_builder steps to build & test folly'
+
+import specs.gmock as gmock
+
+from shell_quoting import ShellQuoted
+
+
+def fbcode_builder_spec(builder):
+    builder.add_option(
+        'folly/_build:cmake_defines',
+        {
+            'BUILD_SHARED_LIBS': 'OFF',
+            'BUILD_TESTS': 'ON',
+        }
+    )
+    return {
+        'depends_on': [gmock],
+        'steps': [
+            builder.fb_github_cmake_install('folly/_build'),
+            builder.step('Run folly tests', [
+                builder.run(ShellQuoted('ctest -j {n}').format(
+                    n=builder.option('make_parallelism'),
+                ))
+            ]),
+        ]
+    }
+
+
+config = {
+    'github_project': 'facebook/folly',
+    'fbcode_builder_spec': fbcode_builder_spec,
+}