From 27f77e1b8948b208ccecccf4de70ebaf18531f97 Mon Sep 17 00:00:00 2001
From: Tom Finegan <tomfinegan@google.com>
Date: Tue, 9 Feb 2021 11:29:14 -0800
Subject: [PATCH] Set workflow os explicitly.

Google policy requires that specific os versions are targeted when using GitHub actions.
---
 .github/workflows/test.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 162e2ff..72fcae2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,19 +5,19 @@ jobs:
     strategy:
       matrix:
         include:
-          - os: ubuntu-latest
+          - os: ubuntu-20.04
             cc: gcc-10
             cxx: g++-10
             generator: Unix Makefiles
-          - os: ubuntu-latest
+          - os: ubuntu-20.04
             cc: clang
             cxx: clang++
             generator: Unix Makefiles
-          - os: macos-latest
+          - os: macos-10.15
             cc: gcc-10
             cxx: g++-10
             generator: Unix Makefiles
-          - os: windows-latest
+          - os: windows-2019
             cc: x86_64-w64-mingw32-gcc
             cxx: x86_64-w64-mingw32-g++
             generator: MinGW Makefiles