refactor(scripts): move some code to macro

scripts/release/BUILD.bazel

@@ -1,8 +1,6 @@
-load("@bazel_skylib//rules:write_file.bzl", "write_file")
-load("//lib:create_module_bazel.bzl", "create_module_bazel")
 load("//lib:git_archive.bzl", "git_archive")
 load("//platforms:host.bzl", "HOST_PLATFORM")
-load("//toolchains:toolchains.bzl", "TOOLS")
+load(":defs.bzl", "dist_files")
 
 sh_binary(
     name = "copy_assets",
@@ -25,82 +23,15 @@ sh_binary(
     tags = ["manual"],
 )
 
-genrule(
-    name = "create_assets_bzl",
-    srcs = ["//cmd/sha:shasums"],
-    outs = ["toolchains_sha_assets.bzl"],
-    cmd = "./$(location :create_assets) $(SRCS) > $(OUTS)",
-    tags = ["manual"],
-    tools = [":create_assets"],
-)
-
-create_module_bazel(
-    name = "root_module_bazel",
-    out = "root_MODULE.bazel",
-    tags = ["manual"],
-)
-
-ROOT_BUILD_FILE = """\
-load("@rules_license//rules:license.bzl", "license")
-
-package(
-    default_applicable_licenses = [":license"],
-    default_visibility = ["//visibility:public"],
-)
-
-license(
-    name = "license",
-    license_kinds = [
-        "@rules_license//licenses/spdx:LGPL-3.0-or-later",
-    ],
-    license_text = "LICENSE",
-)
-
-exports_files([
-    "LICENSE",
-    "MODULE.bazel",
-    "extensions.bzl",
-])
-"""
-
-TOOLCHAIN_ALIAS = """\
-alias(
-  name = "{name}",
-  actual = "@bzlparty_tools//toolchains:{name}",
-)
-
-alias(
-  name = "{name}_toolchain_type",
-  actual = "@bzlparty_tools//toolchains:{name}_toolchain_type",
-)
-"""
-
-write_file(
-    name = "root_build_bazel",
-    out = "root_BUILD.bazel",
-    content = [ROOT_BUILD_FILE] + [
-        TOOLCHAIN_ALIAS.format(name = name)
-        for name in TOOLS.keys()
-    ],
-    tags = ["manual"],
-)
-
-write_file(
-    name = "toolchains_build_bazel",
-    out = "toolchains_BUILD.bazel",
-    content = [
-        """load(":toolchains.bzl", "bzlparty_toolchains")""",
-        "bzlparty_toolchains()",
-    ],
-    tags = ["manual"],
-)
+dist_files()
 
 git_archive(
     name = "git_archive",
     package_name = "tools",
     sha = "//cmd/sha:sha_%s" % HOST_PLATFORM,
     tags = ["manual"],
     virtual_files = {
+        # these files come from `dist_files` macro
         ":root_BUILD.bazel": "BUILD.bazel",
         ":root_MODULE.bazel": "MODULE.bazel",
         ":toolchains_BUILD.bazel": "toolchains/BUILD.bazel",

scripts/release/defs.bzl

@@ -0,0 +1,76 @@
+"Release helpers"
+
+load("@bazel_skylib//rules:write_file.bzl", "write_file")
+load("//lib:create_module_bazel.bzl", "create_module_bazel")
+load("//toolchains:toolchains.bzl", "TOOLS")
+
+_ROOT_BUILD_FILE = """\
+load("@rules_license//rules:license.bzl", "license")
+
+package(
+    default_applicable_licenses = [":license"],
+    default_visibility = ["//visibility:public"],
+)
+
+license(
+    name = "license",
+    license_kinds = [
+        "@rules_license//licenses/spdx:LGPL-3.0-or-later",
+    ],
+    license_text = "LICENSE",
+)
+
+exports_files([
+    "LICENSE",
+    "MODULE.bazel",
+    "extensions.bzl",
+])
+"""
+
+_TOOLCHAIN_ALIAS = """\
+alias(
+  name = "{name}",
+  actual = "@bzlparty_tools//toolchains:{name}",
+)
+
+alias(
+  name = "{name}_toolchain_type",
+  actual = "@bzlparty_tools//toolchains:{name}_toolchain_type",
+)
+"""
+
+def dist_files(name = "dist_files"):
+    native.genrule(
+        name = "create_assets_bzl",
+        srcs = ["//cmd/sha:shasums"],
+        outs = ["toolchains_sha_assets.bzl"],
+        cmd = "./$(location :create_assets) $(SRCS) > $(OUTS)",
+        tags = ["manual"],
+        tools = [":create_assets"],
+    )
+
+    create_module_bazel(
+        name = "root_module_bazel",
+        out = "root_MODULE.bazel",
+        tags = ["manual"],
+    )
+
+    write_file(
+        name = "root_build_bazel",
+        out = "root_BUILD.bazel",
+        content = [_ROOT_BUILD_FILE] + [
+            _TOOLCHAIN_ALIAS.format(name = name)
+            for name in TOOLS.keys()
+        ],
+        tags = ["manual"],
+    )
+
+    write_file(
+        name = "toolchains_build_bazel",
+        out = "toolchains_BUILD.bazel",
+        content = [
+            """load(":toolchains.bzl", "bzlparty_toolchains")""",
+            "bzlparty_toolchains()",
+        ],
+        tags = ["manual"],
+    )