From 6b866401db19a8a0fa59cbcb9c90999783bbae4d Mon Sep 17 00:00:00 2001
From: Chris Darroch <chrisd8088@github.com>
Date: Thu, 17 Sep 2020 22:16:19 -0700
Subject: [PATCH] Actions: add Watchman-enabled builds to CI matrix

---
 .github/workflows/continuous-integration.yml | 35 ++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index a6708cd53e..09a7f33b47 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -15,6 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-16.04, ubuntu-18.04, ubuntu-20.04, windows-2019, macos-10.15]
+        watchman: [false, true]
 
     env:
       BUILD_FRAGMENT: bin/Release/netcoreapp3.1
@@ -92,6 +93,40 @@ jobs:
         Wait-Process $files[0].Basename
         Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\GitForWindows'
 
+    - name: Install Watchman (Linux)
+      if: runner.os == 'Linux' && matrix.watchman
+      run: |
+        cd ..
+        git clone https://github.com/facebook/watchman.git -b v4.9.0 --depth 1
+        cd watchman
+        ./autogen.sh
+        GCC_VERSION=$(gcc -dumpversion | cut -d. -f1)
+        if [ "$GCC_VERSION" -ge 7 ]; then CPPFLAGS="-Wno-error=format-truncation"; fi
+        if [ "$GCC_VERSION" -ge 8 ]; then CPPFLAGS="$CPPFLAGS -Wno-error=class-memaccess"; fi
+        export CPPFLAGS
+        ./configure --without-python
+        make
+        sudo make install
+
+    - name: Install Watchman (Mac)
+      if: runner.os == 'macOS' && matrix.watchman
+      run: brew install watchman
+
+    - name: Install Watchman (Windows)
+      if: runner.os == 'Windows' && matrix.watchman
+      run: |
+        Write-Host 'Downloading Watchman ...'
+        $Uri = (Select-Xml -Path Directory.Build.props -XPath /Project/PropertyGroup/WatchmanPackageUrl).Node.'#text'
+        Set-Location -Path ..
+        Invoke-WebRequest -Uri $Uri -OutFile watchman.zip
+        Expand-Archive watchman.zip
+        Write-Host 'Installing Watchman ...'
+        New-Item -Path 'C:\Program Files' -Name Watchman -ItemType Directory | Out-Null
+        Copy-Item -Path 'watchman\watchman-*-windows\bin\*' -Destination 'C:\Program Files\Watchman'
+        $ENV:PATH="$ENV:PATH;C:\Program Files\Watchman"
+        & watchman --version
+        echo "::add-path::C:\Program Files\Watchman"
+
     - name: Functional test
       shell: bash
       run: |