GHA: add a bazel build CI job

Ensure that we keep the bazel builds usable with our changes. Add a
simple CI check for the bazel based builds.

Author: compnerd

.github/workflows/build.yml

@@ -75,6 +75,19 @@ jobs:
           path: |
             ${{ github.workspace }}/BinaryCache/ds2/Release/ds2.exe
 
+  bazel:
+    runs-on: ubuntu-latest
+    name: Bazel Build Check
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          path: ${{ github.workspace }}/SourceCache/ds2
+      - run: |
+          sudo apt-get update
+          sudo apt-get install -qq --no-install-recommends bison flex ninja-build 
+      - run: |
+          bazel build //...
+        working-directory: ${{ github.workspace }}/SourceCache/ds2
 
   mingw:
     needs: [windows_tools]

BUILD

@@ -139,7 +139,7 @@ config_setting(
             "@platforms//os:macos": "darwin",
             "@platforms//os:windows": "windows",
         }) + " -I DebugServer2/Architecture/RegisterLayout.h -h -o $@ -f $<",
-        exec_tools = ["//Tools/RegsGen2:regsgen2"],
+        tools = ["//Tools/RegsGen2:regsgen2"],
     )
     for arch in ("ARM", "ARM64", "RISCV32", "RISCV64", "RISCV128", "X86", "X86_64")
 ]
@@ -156,7 +156,7 @@ config_setting(
             "@platforms//os:macos": "darwin",
             "@platforms//os:windows": "windows",
         }) + " -I DebugServer2/Architecture/{}/RegistersDescriptors.h -c -o $@ -f $<".format(arch),
-        exec_tools = ["//Tools/RegsGen2:regsgen2"],
+        tools = ["//Tools/RegsGen2:regsgen2"],
     )
     for arch in ("ARM", "ARM64", "RISCV32", "RISCV64", "RISCV128", "X86", "X86_64")
 ]

MODULE.bazel

@@ -0,0 +1,5 @@
+bazel_dep(name = "bazel_skylib", version = "1.7.1")
+bazel_dep(name = "rules_m4", version = "0.2.4")
+bazel_dep(name = "rules_bison", version = "0.3.1")
+bazel_dep(name = "rules_flex", version = "0.3.1")
+bazel_dep(name = "platforms", version = "0.0.11")