chore(deps): update dependency bazel to v7

.bazelignore

@@ -1,3 +1,2 @@
-bazel-*
 docs
 examples

.bazelversion

@@ -1 +1 @@
-6.4.0
+7.0.0

.github/workflows/build-tests.yaml

@@ -56,14 +56,15 @@ jobs:
           echo "build --config=clang" > $HOME/.bazelrc
           echo "build:clang --@rules_cuda//cuda:archs=sm_80" >> $HOME/.bazelrc
 
-      - run: bazelisk build @rules_cuda_examples//basic:all
-      - run: bazelisk build @rules_cuda_examples//rdc:all
-      - run: bazelisk build @rules_cuda_examples//if_cuda:main
-      - run: bazelisk build @rules_cuda_examples//if_cuda:main --enable_cuda=False
-
-      - run: cd examples && bazelisk build //basic:all --config=bzlmod
-      - run: cd examples && bazelisk build //rdc:all --config=bzlmod
-      - run: cd examples && bazelisk build //if_cuda:main --config=bzlmod
-      - run: cd examples && bazelisk build //if_cuda:main --enable_cuda=False --config=bzlmod
-
+      # Use Bazel with version specified in .bazelversion
+      # out of @examples repo build requires WORKSPACE-based external dependency system
+      - run: bazelisk build --noenable_bzlmod @rules_cuda_examples//basic:all
+      - run: bazelisk build --noenable_bzlmod @rules_cuda_examples//rdc:all
+      - run: bazelisk build --noenable_bzlmod @rules_cuda_examples//if_cuda:main
+      - run: bazelisk build --noenable_bzlmod @rules_cuda_examples//if_cuda:main --enable_cuda=False
+      # in @examples repo build, bzlmod is enabled by default since Bazel 7
+      - run: cd examples && bazelisk build //basic:all
+      - run: cd examples && bazelisk build //rdc:all
+      - run: cd examples && bazelisk build //if_cuda:main
+      - run: cd examples && bazelisk build //if_cuda:main --enable_cuda=False
       - run: bazelisk shutdown

MODULE.bazel

@@ -7,8 +7,8 @@ module(
 bazel_dep(name = "bazel_skylib", version = "1.4.2")
 bazel_dep(name = "platforms", version = "0.0.6")
 
-toolchain = use_extension("@rules_cuda//cuda:extensions.bzl", "toolchain")
-use_repo(toolchain, "local_cuda")
+cuda = use_extension("@rules_cuda//cuda:extensions.bzl", "toolchain")
+use_repo(cuda, "local_cuda")
 
 register_toolchains(
     "@local_cuda//toolchain:nvcc-local-toolchain",

docs/BUILD.bazel

@@ -1,32 +1,50 @@
 load("@io_bazel_stardoc//stardoc:stardoc.bzl", "stardoc")
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
+bzl_library(
+    name = "bazel_tools_bzl_srcs",
+    srcs = ["@bazel_tools//tools:bzl_srcs"],
+)
 
 # NOTE: when the `out` is changed, the `nav` part of `mkdocs.yaml` must be also be changed correspondingly.
 stardoc(
     name = "user_docs",
     out = "user/user_docs.md",
     input = "user_docs.bzl",
-    deps = ["@rules_cuda//:bzl_srcs"],
+    deps = [
+        ":bazel_tools_bzl_srcs",
+        "@rules_cuda//:bzl_srcs",
+    ],
 )
 
 stardoc(
     name = "toolchain_config_docs",
     out = "user/toolchain_config_docs.md",
     input = "toolchain_config_docs.bzl",
-    deps = ["@rules_cuda//:bzl_srcs"],
+    deps = [
+        ":bazel_tools_bzl_srcs",
+        "@rules_cuda//:bzl_srcs",
+    ],
 )
 
 stardoc(
     name = "providers_docs",
     out = "developer/providers_docs.md",
     input = "providers_docs.bzl",
-    deps = ["@rules_cuda//:bzl_srcs"],
+    deps = [
+        ":bazel_tools_bzl_srcs",
+        "@rules_cuda//:bzl_srcs",
+    ],
 )
 
 stardoc(
     name = "developer_docs",
     out = "developer/developer_docs.md",
     input = "developer_docs.bzl",
-    deps = ["@rules_cuda//:bzl_srcs"],
+    deps = [
+        ":bazel_tools_bzl_srcs",
+        "@rules_cuda//:bzl_srcs",
+    ],
 )
 
 filegroup(

docs/MODULE.bazel

@@ -0,0 +1,20 @@
+module(
+    name = "rules_cuda_docs",
+    version = "0.0.0",
+    compatibility_level = 1,
+)
+
+bazel_dep(name = "rules_cuda", version = "0.2.1")
+local_path_override(
+    module_name = "rules_cuda",
+    path = "..",
+)
+
+cuda = use_extension("@rules_cuda//cuda:extensions.bzl", "toolchain")
+cuda.local_toolchain(
+    name = "local_cuda",
+    toolkit_path = "",
+)
+use_repo(cuda, "local_cuda")
+
+bazel_dep(name = "stardoc", version = "0.6.2")

examples/.bazelrc

@@ -14,6 +14,6 @@ build:clang --repo_env=CC=clang
 build:clang --@rules_cuda//cuda:compiler=clang
 
 # https://github.com/bazel-contrib/rules_cuda/issues/1
-build --ui_event_filters=-INFO
+# build --ui_event_filters=-INFO
 
 common:bzlmod --enable_bzlmod

examples/MODULE.bazel

@@ -16,3 +16,9 @@ cuda.local_toolchain(
     toolkit_path = "",
 )
 use_repo(cuda, "local_cuda")
+
+#################################
+# Dependencies for nccl example #
+#################################
+# See WORKSPACE.bzlmod for the remaining parts
+bazel_dep(name = "bazel_skylib", version = "1.4.2")

examples/WORKSPACE.bzlmod

@@ -0,0 +1,31 @@
+#################################
+# Dependencies for nccl example #
+#################################
+# NOTE: this should have been placed in MODULE.bazel, but use_repo_rule is introduced in Bazel 7.
+# See https://github.com/bazelbuild/bazel/issues/17141
+
+# http_archive = use_repo_rule("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")  # For MODULE.bazel
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")  # For WORKSPACE.bazel
+
+http_archive(
+    name = "nccl",
+    add_prefix = "nccl",
+    build_file = "@rules_cuda_examples//nccl:nccl.BUILD",
+    sha256 = "83b299cfc2dfe63887dadf3590b3ac2b8b2fd68ec5515b6878774eda39a697d2",
+    strip_prefix = "nccl-9814c75eea18fc7374cde884592233b6b7dc055b",
+    urls = ["https://github.com/nvidia/nccl/archive/9814c75eea18fc7374cde884592233b6b7dc055b.tar.gz"],
+)
+
+http_archive(
+    name = "nccl-tests",
+    add_prefix = "nccl-tests",
+    build_file = "@rules_cuda_examples//nccl:nccl-tests.BUILD",
+    patch_args = [
+        "--directory=nccl-tests",
+        "-p1",
+    ],
+    patches = ["@rules_cuda_examples//nccl:nccl-tests-clang.patch"],
+    sha256 = "946adb84f63aec66aea7aab9739d41df81c24f783e85fba6328ba243cfc057e0",
+    strip_prefix = "nccl-tests-1a5f551ffd6e3271982b03a9d5653a3f6ba545fa",
+    urls = ["https://github.com/nvidia/nccl-tests/archive/1a5f551ffd6e3271982b03a9d5653a3f6ba545fa.tar.gz"],
+)