Add bzlmod tests (#231)

.bazelignore

@@ -0,0 +1 @@
+examples

.bcr/presubmit.yml

@@ -1,10 +1,18 @@
-# We should probably create a standalone test module, but for now we'll just run our in-repo tests.
 bcr_test_module:
   matrix:
     platform: ["debian10", "macos", "ubuntu2004", "windows"]
   tasks:
-    run_tests:
-      name: "Run tests"
+    gazelle:
+      working_directory: "examples/gazelle"
+      name: "Gazelle"
+      platform: ${{ platform }}
+      run_targets:
+        - "//:gazelle"
+      test_targets:
+        - "//..."
+    tests_and_lints:
+      working_directory: "examples/tests_and_lints"
+      name: "Tests and lints"
       platform: ${{ platform }}
       test_targets:
         - "//..."

.github/workflows/ci.yaml

@@ -38,17 +38,29 @@ jobs:
         env:
           # Bazelisk will download bazel to here, ensure it is cached between runs.
           XDG_CACHE_HOME: ~/.cache/bazel-repo
-        run: bazel --bazelrc=.github/workflows/ci.bazelrc --bazelrc=.bazelrc test --config=jdk11 //...
+        run: bazel --bazelrc=.github/workflows/ci.bazelrc test --config=jdk11 //...
 
       - name: bazel test //... (Java 17)
         env:
           # Bazelisk will download bazel to here, ensure it is cached between runs.
           XDG_CACHE_HOME: ~/.cache/bazel-repo
-        run: bazel --bazelrc=.github/workflows/ci.bazelrc --bazelrc=.bazelrc test //...
+        run: bazel --bazelrc=.github/workflows/ci.bazelrc test //...
 
       - name: bazel test //... (no bzlmod)
         env:
           # Bazelisk will download bazel to here, ensure it is cached between runs.
           XDG_CACHE_HOME: ~/.cache/bazel-repo
           # The docs targets are tagged as `manual` to prevent stardoc from running with bzlmod
-        run: bazel --bazelrc=.github/workflows/ci.bazelrc --bazelrc=.bazelrc test --noenable_bzlmod //... //docs:all
+        run: bazel --bazelrc=.github/workflows/ci.bazelrc test --noenable_bzlmod //... //docs:all
+
+      - name: bzlmod tests_and_lints
+        env:
+          # Bazelisk will download bazel to here, ensure it is cached between runs.
+          XDG_CACHE_HOME: ~/.cache/bazel-repo
+        run: (cd examples/tests_and_lints && bazel --bazelrc=../../.github/workflows/ci.bazelrc test --enable_bzlmod //...)
+
+      - name: bzlmod gazelle
+        env:
+          # Bazelisk will download bazel to here, ensure it is cached between runs.
+          XDG_CACHE_HOME: ~/.cache/bazel-repo
+        run: (cd examples/gazelle && bazel --bazelrc=../../.github/workflows/ci.bazelrc run --enable_bzlmod //:gazelle && bazel --bazelrc=../../.github/workflows/ci.bazelrc test --enable_bzlmod //...)

examples/gazelle/.gitignore

@@ -0,0 +1,2 @@
+/bazel-*
+/MODULE.bazel.lock

examples/gazelle/BUILD.bazel

@@ -0,0 +1,15 @@
+load("@gazelle//:def.bzl", "gazelle", "gazelle_binary")
+
+gazelle_binary(
+    name = "gazelle_binary",
+    languages = [
+        "@gazelle//language/proto:go_default_library",
+        "@contrib_rules_jvm//java/gazelle",
+    ],
+    visibility = ["//visibility:private"],
+)
+
+gazelle(
+    name = "gazelle",
+    gazelle = ":gazelle_binary",
+)

examples/gazelle/MODULE.bazel

@@ -0,0 +1,44 @@
+module(
+    name = "gazelle_example",
+    version = "0.0.0",
+)
+
+bazel_dep(
+    name = "contrib_rules_jvm",
+    version = "0.0.0",
+)
+local_path_override(
+    module_name = "contrib_rules_jvm",
+    path = "../..",
+)
+
+bazel_dep(
+    name = "bazel_skylib",
+    version = "1.5.0",
+)
+bazel_dep(
+    name = "rules_jvm_external",
+    version = "5.3",
+)
+
+maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven")
+maven.install(
+    name = "maven",
+    artifacts = [
+        "org.junit.jupiter:junit-jupiter-api:5.8.2",
+        "org.junit.jupiter:junit-jupiter-engine:5.8.2",
+        "org.junit.platform:junit-platform-launcher:1.8.2",
+        "org.junit.platform:junit-platform-reporting:1.8.2",
+    ],
+    lock_file = "//:maven_install.json",
+)
+use_repo(
+    maven,
+    "maven",
+    "unpinned_maven",
+)
+
+bazel_dep(
+    name = "gazelle",
+    version = "0.34.0",
+)

examples/gazelle/README.md

@@ -0,0 +1,5 @@
+This example contains java files which don't have BUILD targets for them.
+
+It requires running `bazel run :gazelle` to generate targets which can be built.
+
+There is a test using `genquery` which asserts that the right targets are generated.