Add fmt to Folly's open-source dependencies

Reviewed By: yfeldblum

Differential Revision: D14813810

fbshipit-source-id: b6294f0b2e52bd062ad7b1d5977fbe68dec82d1b

build/fbcode_builder/specs/fmt.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+# Copyright (c) Facebook, Inc. and its affiliates.
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+
+def fbcode_builder_spec(builder):
+    builder.add_option('fmtlib/fmt:git_hash', '5.3.0')
+    return {
+        'steps': [
+            builder.github_project_workdir('fmtlib/fmt', 'build'),
+            builder.cmake_install('fmtlib/fmt'),
+        ],
+    }