Introduce Bazel build for Windows (#317)

To speed things up the workflow uses a cache which reduces the runtime
for the Bazel invocation on from ~20 minutes to a minimum of ~30 seconds
at the cost of a ~3 minute cache download and a ~1 minute cache upload
on changed chache.

.bazelrc

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # Use the earliest supported C++ version for protoc.
-build --cxxopt=-std=c++14 --host_cxxopt=-std=c++14 --repo_env=BAZEL_CXXOPTS=-std=c++14
+build --cxxopt=-std=c++14 --host_cxxopt=-std=c++14
 
 build --test_output=errors
 
@@ -49,3 +49,8 @@ build:tsan --config=nightly -c dbg
 build:tsan --@rules_rust//:extra_rustc_flags=-Zsanitizer=thread
 build:tsan --cache_test_results=no
 build:tsan --run_under=//tools:tsan.sh
+
+# Configuration options for Windows builds.
+startup:windows --windows_enable_symlinks
+build:windows --cxxopt=/std:c++14 --host_cxxopt=/std:c++14
+build:windows --enable_runfiles

.github/workflows/main.yml

@@ -8,7 +8,23 @@ on:
     branches: [ main ]
 
 jobs:
-  windows-tests:
+  windows-bazel-tests:
+    # The type of runner that the job will run on.
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v3.5.3
+      with:
+        fetch-depth: 0
+    - uses: bazelbuild/setup-bazelisk@v2
+    - name: Mount Bazel cache
+      uses: actions/cache@v3
+      with:
+        path: "C:/tmp"
+        key: bazel-windows
+    - name: Test Bazel build on Windows
+      run: bazel --output_user_root=C:/tmp test --config=windows ...
+      shell: bash
+  windows-cargo-tests:
     # The type of runner that the job will run on.
     runs-on: windows-latest
     steps:
@@ -19,7 +35,6 @@ jobs:
       run: cargo build --all
     - name: Test on windows
       run: cargo test --all
-
   cargo-tests:
     # The type of runner that the job will run on.
     runs-on: ubuntu-22.04

Cargo.Bazel.lock

@@ -1,5 +1,5 @@
 {
-  "checksum": "e20d695c1b6eb23441e6126581ec3f80e3dd5d45305e301b36bd685264228987",
+  "checksum": "2c3f1e765c34a9f17991d83113aef0f1ba948d0bffedde6568223a3053d148ef",
   "crates": {
     "addr2line 0.20.0": {
       "name": "addr2line",
@@ -12740,6 +12740,34 @@
         "compile_data_glob": [
           "**"
         ],
+        "crate_features": {
+          "common": [
+            "consoleapi",
+            "errhandlingapi",
+            "fileapi",
+            "handleapi",
+            "knownfolders",
+            "minwinbase",
+            "minwindef",
+            "ntdef",
+            "objbase",
+            "processenv",
+            "processthreadsapi",
+            "profileapi",
+            "psapi",
+            "shlobj",
+            "std",
+            "sysinfoapi",
+            "timezoneapi",
+            "winbase",
+            "wincon",
+            "winerror",
+            "winnt",
+            "ws2ipdef",
+            "ws2tcpip"
+          ],
+          "selects": {}
+        },
         "deps": {
           "common": [
             {
@@ -12983,6 +13011,39 @@
         "compile_data_glob": [
           "**"
         ],
+        "crate_features": {
+          "common": [
+            "Win32",
+            "Win32_Foundation",
+            "Win32_Globalization",
+            "Win32_NetworkManagement",
+            "Win32_NetworkManagement_IpHelper",
+            "Win32_Networking",
+            "Win32_Networking_WinSock",
+            "Win32_Security",
+            "Win32_Security_Authentication",
+            "Win32_Security_Authentication_Identity",
+            "Win32_Security_Credentials",
+            "Win32_Security_Cryptography",
+            "Win32_Storage",
+            "Win32_Storage_FileSystem",
+            "Win32_System",
+            "Win32_System_Com",
+            "Win32_System_Console",
+            "Win32_System_Diagnostics",
+            "Win32_System_Diagnostics_Debug",
+            "Win32_System_IO",
+            "Win32_System_Memory",
+            "Win32_System_Pipes",
+            "Win32_System_SystemServices",
+            "Win32_System_Threading",
+            "Win32_System_WindowsProgramming",
+            "Win32_UI",
+            "Win32_UI_Shell",
+            "default"
+          ],
+          "selects": {}
+        },
         "deps": {
           "common": [
             {
@@ -13578,9 +13639,12 @@
     "cfg(all(target_arch = \"x86_64\", target_env = \"gnu\", not(target_abi = \"llvm\"), not(windows_raw_dylib)))": [
       "x86_64-unknown-linux-gnu"
     ],
-    "cfg(all(target_arch = \"x86_64\", target_env = \"msvc\", not(windows_raw_dylib)))": [],
+    "cfg(all(target_arch = \"x86_64\", target_env = \"msvc\", not(windows_raw_dylib)))": [
+      "x86_64-pc-windows-msvc"
+    ],
     "cfg(any(target_arch = \"aarch64\", target_arch = \"x86_64\", target_arch = \"x86\"))": [
       "aarch64-unknown-linux-gnu",
+      "x86_64-pc-windows-msvc",
       "x86_64-unknown-linux-gnu"
     ],
     "cfg(any(target_os = \"linux\", target_os = \"android\", target_os = \"macos\", target_os = \"ios\"))": [
@@ -13600,12 +13664,14 @@
       "aarch64-unknown-linux-gnu",
       "arm-unknown-linux-gnueabi",
       "armv7-unknown-linux-gnueabi",
+      "x86_64-pc-windows-msvc",
       "x86_64-unknown-linux-gnu"
     ],
     "cfg(not(any(target_arch = \"wasm32\", target_arch = \"wasm64\")))": [
       "aarch64-unknown-linux-gnu",
       "arm-unknown-linux-gnueabi",
       "armv7-unknown-linux-gnueabi",
+      "x86_64-pc-windows-msvc",
       "x86_64-unknown-linux-gnu"
     ],
     "cfg(not(any(target_os = \"windows\", target_os = \"macos\", target_os = \"ios\")))": [
@@ -13624,6 +13690,7 @@
       "aarch64-unknown-linux-gnu",
       "arm-unknown-linux-gnueabi",
       "armv7-unknown-linux-gnueabi",
+      "x86_64-pc-windows-msvc",
       "x86_64-unknown-linux-gnu"
     ],
     "cfg(not(windows))": [
@@ -13639,18 +13706,25 @@
     "cfg(target_os = \"hermit\")": [],
     "cfg(target_os = \"redox\")": [],
     "cfg(target_os = \"wasi\")": [],
-    "cfg(target_os = \"windows\")": [],
+    "cfg(target_os = \"windows\")": [
+      "x86_64-pc-windows-msvc"
+    ],
     "cfg(tokio_taskdump)": [],
     "cfg(unix)": [
       "aarch64-unknown-linux-gnu",
       "arm-unknown-linux-gnueabi",
       "armv7-unknown-linux-gnueabi",
       "x86_64-unknown-linux-gnu"
     ],
-    "cfg(windows)": [],
+    "cfg(windows)": [
+      "x86_64-pc-windows-msvc"
+    ],
     "i686-pc-windows-gnu": [],
     "x86_64-pc-windows-gnu": [],
     "x86_64-pc-windows-gnullvm": [],
+    "x86_64-pc-windows-msvc": [
+      "x86_64-pc-windows-msvc"
+    ],
     "x86_64-unknown-linux-gnu": [
       "x86_64-unknown-linux-gnu"
     ]

README.md

@@ -74,11 +74,19 @@ Runtime dependencies:
 * `libssl-dev` or `libssl1.0-dev` (depending on your distro & version)
 #### Bazel building for deployment
 ```sh
-bazel build //cas
+# On Unix
+bazel build cas
+
+# On Windows
+bazel build --config=windows cas
 ```
 #### Bazel building for release
 ```sh
-bazel build -c opt //cas
+# On Unix
+bazel build -c opt cas
+
+# On Windows
+bazel build --config=windows -c opt cas
 ```
 > **Note**
 > Failing to use the `-c opt` flag will result in a very slow binary (~10x slower).

WORKSPACE

@@ -63,6 +63,7 @@ crates_repository(
         "arm-unknown-linux-gnueabi",
         "armv7-unknown-linux-gnueabi",
         "x86_64-unknown-linux-gnu",
+        "x86_64-pc-windows-msvc",
     ],
 )