feat: start testing on Bazel 8 (#401)

* feat: start testing on Bazel 8

* chore: disable a stardoc diff test on bazel 7

.github/workflows/ci.yaml

@@ -18,18 +18,11 @@ concurrency:
 
 jobs:
   bazel-test:
-    uses: bazel-contrib/.github/.github/workflows/bazel.yaml@v6
+    uses: bazel-contrib/.github/.github/workflows/bazel.yaml@bazel8
     with:
       folders: '[".", "example"]'
       # Don't try for Windows support yet.
       exclude_windows: true
-      # Root module is bzlmod-only and uses newer stardoc that requires Bazel 7.
-      # Example uses incompatible_enable_proto_toolchain_resolution
-      exclude: |
-        [
-          {"bzlmodEnabled": false, "folder": "."},
-          {"bazelversion": "6.4.0"}
-        ]
 
   integration-test:
     runs-on: ubuntu-latest

MODULE.bazel

@@ -12,6 +12,7 @@ bazel_dep(name = "aspect_bazel_lib", version = "2.7.7")
 # Minimum version needs 'chore: bump bazel-lib to 2.0 by @alexeagle in #1311'
 # to allow users on bazel-lib 2.0
 bazel_dep(name = "aspect_rules_js", version = "1.40.0")
+bazel_dep(name = "bazel_features", version = "1.18.0")
 bazel_dep(name = "bazel_skylib", version = "1.4.2")
 bazel_dep(name = "platforms", version = "0.0.7")
 bazel_dep(name = "rules_multirun", version = "0.9.0")

docs/BUILD.bazel

@@ -1,6 +1,7 @@
 # This load statement must be in the docs/ package rather than anything users depend on
 # so that the dependency on stardoc doesn't leak to them.
 load("@aspect_bazel_lib//lib:docs.bzl", "stardoc_with_diff_test", "update_docs")
+load("@bazel_features//private:util.bzl", "lt")
 
 stardoc_with_diff_test(
     name = "lint_test",
@@ -35,6 +36,8 @@ stardoc_with_diff_test(
 stardoc_with_diff_test(
     name = "format",
     bzl_library_target = "//format:defs",
+    # See https://github.com/bazel-contrib/bazel_features/pull/75
+    target_compatible_with = ["@platforms//:incompatible"] if lt("8.0.0-pre.20240911.1") else [],
 )
 
 stardoc_with_diff_test(