Support noenable bzlmod in bazel7

Author: yujunz

.bazelignore

@@ -1 +1 @@
-examples
+examples

.github/actions/build-test/action.yaml

@@ -37,3 +37,8 @@ runs:
       bazel run //:gazelle
       bazel run //:gazelle_check
     shell: bash
+  - name: Test Bazel 7 targets
+    run: |
+      cd examples/bazel7
+      ./tools/cue/test.sh
+    shell: bash

cue/deps.bzl

@@ -0,0 +1,20 @@
+load(
+    "//cue/private/tools/cue:toolchain.bzl",
+    "download_tool",
+    "known_release_versions",
+)
+
+def _cue_tool(name = "cue_tool", version = None, register_toolchains = True):
+    download_tool(
+        name = name,
+        version = version,
+    )
+    if register_toolchains:
+        native.register_toolchains("@{}_toolchains//:all".format(name))
+
+# Register the Cue toolchain for the specified version
+def cue_register_toolchains(name = "cue_tool", version = None, register_toolchains = True):
+    latest_release = known_release_versions()[0]  # Get the latest version from the known release versions
+    if not version:
+        version = latest_release  # Use the latest version if none is specified
+    _cue_tool(name = name, version = version, register_toolchains = register_toolchains)

examples/bazel7/.bazelrc

@@ -0,0 +1,4 @@
+# Disable Bazel Modules. No-op in Bazel 6 as this is the default but Bazel 7 enables them by default.
+build --noenable_bzlmod
+query --noenable_bzlmod
+fetch --noenable_bzlmod

examples/bazel7/.bazelversion

@@ -0,0 +1 @@
+7.6.1

examples/bazel7/.gitignore

@@ -0,0 +1,6 @@
+/bazel-bin
+/bazel-out
+/bazel-testlogs
+/bazel-bazel7
+
+*~

examples/bazel7/WORKSPACE

@@ -0,0 +1,19 @@
+workspace(name = "bazel7")
+
+# load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+# http_archive(
+#     name = "rules_cue",
+#     sha256 = "22eee0fbce6274af199421d3192f403da171d90b4193ed36513669f7615ccd0c",
+#     strip_prefix = "rules_cue-0.15.0",
+#     url = "https://github.com/seh/rules_cue/releases/download/v0.15.0/vcs-archive-v0.15.0.tar.gz",
+# )
+
+local_repository(
+    name = "rules_cue",
+    path = "../..",
+)
+
+load("@rules_cue//cue:deps.bzl", "cue_register_toolchains")
+
+cue_register_toolchains(version = "v0.15.1")

examples/bazel7/tools/cue/BUILD.bazel

@@ -0,0 +1,8 @@
+load("//tools/cue:cmd.bzl", "cue_binary")
+
+exports_files(glob(["*.bzl"]) + ["cmd.sh.tpl"])
+
+cue_binary(
+    name = "cue",
+    visibility = ["//visibility:public"],
+)

examples/bazel7/tools/cue/cmd.bzl

@@ -0,0 +1,65 @@
+"""
+This module contains a rule for running cue commands.
+"""
+
+def _cue_cmd_impl(ctx):
+    cue_tool = ctx.toolchains["@rules_cue//tools/cue:toolchain_type"].cueinfo.tool
+    cmd_sh = ctx.actions.declare_file(ctx.attr.name + ".sh")
+    substitutions = {
+        "%{BUILT_IN}": ctx.attr.built_in,
+        "%{COMMAND}": ctx.attr.command,
+        "%{CUE}": cue_tool.path,
+        "%{CWD}": ctx.label.package,
+    }
+    ctx.actions.expand_template(
+        template = ctx.file._cmd_tpl,
+        output = cmd_sh,
+        substitutions = substitutions,
+    )
+
+    return DefaultInfo(
+        executable = cmd_sh,
+        runfiles = ctx.runfiles(
+            files = [
+                cue_tool,
+            ],
+        ),
+    )
+
+cue_cmd = rule(
+    attrs = {
+        # The cue built-in command to run (e.g., "fmt", "vet").
+        # See https://cuelang.org/docs/reference/command/
+        "built_in": attr.string(
+            mandatory = False,
+            default = "",
+        ),
+        # User command to run with cue cmd {command}.
+        # keep name 'command' for backward compatibility
+        # See https://cuelang.org/docs/reference/command/cue-help-commands/
+        "command": attr.string(
+            mandatory = False,
+        ),
+        "_cmd_tpl": attr.label(
+            default = Label("//tools/cue:cmd.sh.tpl"),
+            allow_single_file = True,
+        ),
+    },
+    implementation = _cue_cmd_impl,
+    executable = True,
+    toolchains = ["@rules_cue//tools/cue:toolchain_type"],
+)
+
+def cue_binary(name, **kwargs):
+    """
+    A convenience alias for cue_cmd.
+
+    Args:
+        name: The name of the rule.
+        **kwargs: Additional arguments to pass to cue_cmd.
+    """
+    cue_cmd(
+        name = name,
+        built_in = "",
+        **kwargs
+    )

examples/bazel7/tools/cue/cmd.sh.tpl

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set +ex
+
+CUE=$(readlink -f %{CUE})
+cd "${BUILD_WORKSPACE_DIRECTORY}/%{CWD}"
+
+if [ -n "%{COMMAND}" ]; then
+    CUE_DEBUG=sortfields $CUE cmd %{COMMAND} "$@"
+else
+    CUE_DEBUG=sortfields $CUE %{BUILT_IN} "$@"
+fi