Ensure go versions are synced between MODULE.bazel and go.mod.

BUILD.bazel

@@ -18,6 +18,7 @@ load("@rules_python//python:pip.bzl", "compile_pip_requirements")
 load("@rules_python_gazelle_plugin//manifest:defs.bzl", "gazelle_python_manifest")
 load("@rules_python_gazelle_plugin//modules_mapping:def.bzl", "modules_mapping")
 load("//bzl:rules.bzl", "bazel_lint")
+load("//go/cmd/version_sync:go_version_sync.bzl", "go_version_sync")
 load("//js:rules.bzl", "copy_to_bin", "js_library")
 load("//ts:rules.bzl", "ts_config")
 
@@ -111,29 +112,8 @@ bin.renovate_config_validator_test(
 
 npm_link_all_packages(name = "node_modules")
 
-native_test(
-    name = "go_versions_synced",
-    size = "small",
-    src = "//go/cmd/version_sync",
-    out = "version_sync_test.o",
-    data = [
-        "MODULE.bazel",
-        "go.mod",
-    ],
-)
-
-sh_binary(
-    name = "go_versions_synced.fix",
-    srcs = ["fix_go_version_sync.sh"],
-    data = [
-        "//go/cmd/version_sync",
-    ],
-    env = {
-        "VERSION_SYNC": "$(rlocationpath //go/cmd/version_sync)",
-    },
-    deps = [
-        "@bazel_tools//tools/bash/runfiles",
-    ],
+go_version_sync(
+    name = "go_version_sync",
 )
 
 js_library(
@@ -246,6 +226,7 @@ py_venv(
         "//project/cultist/gen/testing",
         "//py",
         "//py/ci/postUpgrade:postUpgrade_bin",
+        "//py/copy_to_workspace:copy_to_workspace_bin",
         "//py/devtools",
         "//py/devtools/prep",
         "//py/devtools/prep:prep_bin",

MODULE.bazel

@@ -128,8 +128,10 @@ bazel_dep(name = "bazel_features", version = "1.23.0")
 bazel_dep(name = "rules_go", version = "0.52.0", repo_name = "io_bazel_rules_go")
 bazel_dep(name = "gazelle", version = "0.41.0", repo_name = "bazel_gazelle")
 
+GO_VERSION = "1.23.5"
+
 go_sdk = use_extension("@io_bazel_rules_go//go:extensions.bzl", "go_sdk")
-go_sdk.download(version = "1.23.5")
+go_sdk.download(version = GO_VERSION)
 use_repo(
     go_sdk,
     "go_toolchains",
@@ -149,6 +151,7 @@ use_repo(
     "com_github_aws_aws_sdk_go_v2_service_s3",
     "com_github_bazelbuild_bazel_watcher",
     "com_github_bazelbuild_buildtools",
+    "com_github_blang_semver_v4",
     "com_github_go_delve_delve",
     "com_github_golang_protobuf",
     "com_github_google_go_containerregistry",

bzl/binary_with_args/BUILD.bazel

@@ -0,0 +1,14 @@
+load("//bzl:rules.bzl", "bazel_lint")
+
+exports_files(
+    ["binary_with_args.sh"],
+    visibility = ["//:__subpackages__"],
+)
+
+bazel_lint(
+    name = "bazel_lint",
+    srcs = [
+        "BUILD.bazel",
+        "binary_with_args.bzl",
+    ],
+)

bzl/binary_with_args/binary_with_args.bzl

@@ -0,0 +1,15 @@
+def binary_with_args(name, binary, args, data = [], **kwargs):
+    native.sh_binary(
+        name = name,
+        srcs = ["//bzl/binary_with_args:binary_with_args.sh"],
+        data = [
+            binary,
+        ] + data,
+        args = [
+            "$(rlocationpath " + binary + ")",
+        ] + args,
+        deps = [
+            "@bazel_tools//tools/bash/runfiles",
+        ],
+        **kwargs
+    )

bzl/binary_with_args/binary_with_args.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+# --- begin runfiles.bash initialization v3 ---
+# Copy-pasted from the Bazel Bash runfiles library v3.
+set -uo pipefail; set +e; f=bazel_tools/tools/bash/runfiles/runfiles.bash
+# shellcheck disable=SC1090
+source "${RUNFILES_DIR:-/dev/null}/$f" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "${RUNFILES_MANIFEST_FILE:-/dev/null}" | cut -f2- -d' ')" 2>/dev/null || \
+  source "$0.runfiles/$f" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "$0.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "$0.exe.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+  { echo>&2 "ERROR: cannot find $f"; exit 1; }; f=; set -e
+# --- end runfiles.bash initialization v3 ---
+
+BINARY="$(rlocation $1)"
+shift
+
+$BINARY $@

bzl/golden_test.bzl

@@ -0,0 +1,25 @@
+load("@aspect_bazel_lib//lib:diff_test.bzl", "diff_test")
+load("//py/copy_to_workspace:copy_to_workspace.bzl", "copy_to_workspace")
+
+def golden_test(
+        name,
+        src,
+        golden,  # must be a file in this package.
+        **kwargs):
+    diff_test(
+        name = name,
+        file1 = src,
+        file2 = golden,
+        **kwargs
+    )
+
+    package = native.package_name()
+
+    if package != "":
+        package += "/"
+
+    copy_to_workspace(
+        name = name + ".fix",
+        src = golden,
+        dst = package + src,
+    )

go.mod

@@ -15,6 +15,7 @@ require (
 	github.com/bazelbuild/bazel-watcher v0.25.3
 	github.com/bazelbuild/buildtools v0.0.0-20240918101019-be1c24cc9a44
 	github.com/bazelbuild/rules_go v0.52.0
+	github.com/blang/semver/v4 v4.0.0
 	github.com/go-delve/delve v1.24.0
 	github.com/golang/protobuf v1.5.4
 	github.com/google/go-containerregistry v0.20.3

go/cmd/version_sync/BUILD.bazel

@@ -12,6 +12,7 @@ go_library(
     srcs = ["main.go"],
     importpath = "github.com/zemn-me/monorepo/go/cmd/version_sync",
     visibility = ["//visibility:private"],
+    deps = ["@com_github_blang_semver_v4//:semver"],
 )
 
 bazel_lint(

go/cmd/version_sync/go_version_sync.bzl

@@ -0,0 +1,43 @@
+load("//bzl:golden_test.bzl", "golden_test")
+
+
+def go_version_sync(name):
+    native.genrule(
+        name = name + "_gen_goldens",
+        tools = [
+            "//go/cmd/version_sync"
+        ],
+        cmd_bash = """
+$(execpath //go/cmd/version_sync) \\
+    -go-mod $(rootpath go.mod) \\
+    -module-bazel $(rootpath MODULE.bazel) \\
+    -output-go-mod $(location go.mod.golden) \\
+    -output-module-bazel $(location MODULE.bazel.golden) \\
+    -fix
+        """,
+        srcs = [
+            "MODULE.bazel",
+            "go.mod"
+        ],
+        outs = ["go.mod.golden", "MODULE.bazel.golden"],
+    )
+
+    golden_test(
+        name = name + "_go_mod_test",
+        src = "go.mod",
+        golden = "go.mod.golden"
+    )
+
+    golden_test(
+        name = name + "_bazel_mod_test",
+        src = "MODULE.bazel",
+        golden = "MODULE.bazel.golden"
+    )
+
+    native.test_suite(
+        name = name,
+        tests = [
+            name + "_go_mod_test",
+            name + "_bazel_mod_test"
+        ]
+    )