Enable CI on Windows (appveyor) with Bazel

Signed-off-by: Pavel Samolysov <samolisov@gmail.com>

BUILD.bazel

@@ -135,6 +135,10 @@ cc_library(
         "googletest/samples/sample3-inl.h",
         "googletest/samples/sample4.h",
     ],
+    features = select({
+        ":windows": ["windows_export_all_symbols"],
+        "//conditions:default": [],
+    })
 )
 
 cc_test(
@@ -157,6 +161,7 @@ cc_test(
         "gtest_sample_lib",
         ":gtest_main",
     ],
+    linkstatic = 0,
 )
 
 cc_test(

appveyor.yml

@@ -6,21 +6,31 @@ environment:
   matrix:
     - compiler: msvc-15-seh
       generator: "Visual Studio 15 2017"
+      build_system: cmake
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
 
     - compiler: msvc-15-seh
       generator: "Visual Studio 15 2017 Win64"
+      build_system: cmake
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      enabled_on_pr: yes
+
+    - compiler: msvc-15-seh
+      build_system: bazel
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       enabled_on_pr: yes
 
     - compiler: msvc-14-seh
+      build_system: cmake
       generator: "Visual Studio 14 2015"
       enabled_on_pr: yes
 
     - compiler: msvc-14-seh
+      build_system: cmake
       generator: "Visual Studio 14 2015 Win64"
 
     - compiler: gcc-6.3.0-posix
+      build_system: cmake
       generator: "MinGW Makefiles"
       cxx_path: 'C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32\bin'
       enabled_on_pr: yes
@@ -46,6 +56,12 @@ install:
       }
     }
 
+    # install Bazel
+    if ($env:build_system -eq "bazel") {
+        appveyor DownloadFile https://github.com/bazelbuild/bazel/releases/download/0.21.0/bazel-0.21.0-windows-x86_64.exe -FileName bazel.exe
+    }
+
+    if ($env:build_system -eq "cmake") {
         # git bash conflicts with MinGW makefiles
         if ($env:generator -eq "MinGW Makefiles") {
             $env:path = $env:path.replace("C:\Program Files\Git\usr\bin;", "")
@@ -53,13 +69,31 @@ install:
                 $env:path += ";$env:cxx_path"
             }
         }
+    }
+
+before_build:
+- ps: |
+     $env:root=$env:APPVEYOR_BUILD_FOLDER
+     Write-Output "env:root: $env:root"
 
 build_script:
 - ps: |
     # Only enable some builds for pull requests, the AppVeyor queue is too long.
     if ((Test-Path env:APPVEYOR_PULL_REQUEST_NUMBER) -And (-not (Test-Path env:enabled_on_pr) -or $env:enabled_on_pr -ne "yes")) {
       return
+    } else {
+        # special case - build with Bazel
+        if ($env:build_system -eq "bazel") {
+            & $env:root\bazel.exe build -c opt //:gtest_samples
+            if ($LastExitCode -eq 0) { # bazel writes to StdErr and PowerShell interprets it as an error
+                $host.SetShouldExit(0)
+            } else { # a real error
+                throw "Exec: $ErrorMessage"
+            }
+            return
         }
+    }
+    # by default build with CMake
     md _build -Force | Out-Null
     cd _build
 
@@ -88,16 +122,33 @@ test_script:
     if ((Test-Path env:APPVEYOR_PULL_REQUEST_NUMBER) -And (-not (Test-Path env:enabled_on_pr) -or $env:enabled_on_pr -ne "yes")) {
       return
     }
+    if ($env:build_system -eq "bazel") {
+        # special case - testing with Bazel
+        & $env:root\bazel.exe test //:gtest_samples
+        if ($LastExitCode -eq 0) { # bazel writes to StdErr and PowerShell interprets it as an error
+            $host.SetShouldExit(0)
+        } else { # a real error
+            throw "Exec: $ErrorMessage"
+        }
+    }
+    if ($env:build_system -eq "cmake") {
+        # built with CMake - test with CTest
         if ($env:generator -eq "MinGW Makefiles") {
             return # No test available for MinGW
         }
+
         & ctest -C $env:configuration --timeout 600 --output-on-failure
         if ($LastExitCode -ne 0) {
             throw "Exec: $ErrorMessage"
         }
+    }
 
 artifacts:
   - path: '_build/CMakeFiles/*.log'
     name: logs
   - path: '_build/Testing/**/*.xml'
     name: test_results
+  - path: 'bazel-testlogs/**/test.log'
+    name: test_logs
+  - path: 'bazel-testlogs/**/test.xml'
+    name: test_results