[WIP] Gazelle plugin

BUILD.bazel

@@ -1,13 +1,13 @@
-load("@bazel_gazelle//:def.bzl", "gazelle", "gazelle_binary")
 load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+load("@bazel_gazelle//:def.bzl", "DEFAULT_LANGUAGES", "gazelle", "gazelle_binary")
 
 package(default_visibility = ["//visibility:public"])
 
 exports_files(["AUTHORS"])
 
 gazelle_binary(
     name = "gazelle_bin",
-    languages = ["@bazel_skylib_gazelle_plugin//bzl"],
+    languages = ["@bazel_skylib_gazelle_plugin//bzl"] + DEFAULT_LANGUAGES,
 )
 
 # gazelle:exclude examples
@@ -16,6 +16,21 @@ gazelle(
     gazelle = "gazelle_bin",
 )
 
+gazelle(
+    name = "gazelle_update_repos",
+    args = [
+        "-from_file=go.mod",
+        "-to_macro=go_deps.bzl%go_deps",
+        "-prune",
+    ],
+    command = "update-repos",
+)
+
+sh_binary(
+    name = "tidy",
+    srcs = ["tidy.sh"],
+)
+
 bzl_library(
     name = "internal_deps",
     srcs = ["internal_deps.bzl"],
@@ -24,3 +39,8 @@ bzl_library(
         "@bazel_tools//tools/build_defs/repo:utils.bzl",
     ],
 )
+
+bzl_library(
+    name = "go_deps",
+    srcs = ["go_deps.bzl"],
+)

WORKSPACE

@@ -3,6 +3,8 @@ workspace(name = "rules_dotnet")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load(":internal_deps.bzl", "rules_dotnet_internal_deps")
 
+# gazelle:repo bazel_gazelle
+
 # Fetch deps needed only locally for development
 rules_dotnet_internal_deps()
 
@@ -11,12 +13,34 @@ load(
     "//dotnet:repositories.bzl",
     "dotnet_register_toolchains",
     "rules_dotnet_dependencies",
+    "rules_dotnet_gazelle_dependencies",
 )
 
 rules_dotnet_dependencies()
 
 dotnet_register_toolchains("dotnet", "7.0.101")
 
+rules_dotnet_gazelle_dependencies()
+
+# Gazelle, for generating bzl_library targets, go targets and test the dotnet gazelle plugin
+load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
+load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
+load("//:go_deps.bzl", "go_deps")
+
+# gazelle:repository_macro go_deps.bzl%go_deps
+go_deps()
+
+go_rules_dependencies()
+
+go_register_toolchains(version = "1.20.4")
+
+gazelle_dependencies()
+
+load("//dotnet:gazelle_setup.bzl", "rules_dotnet_gazelle_setup")
+
+# gazelle:repo bazel_gazelle
+rules_dotnet_gazelle_setup()
+
 # Fetch NuGet packages needed by end-users
 load("//dotnet:rules_dotnet_nuget_packages.bzl", "rules_dotnet_nuget_packages")
 
@@ -40,18 +64,6 @@ load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
 
 rules_pkg_dependencies()
 
-load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
-
-############################################
-# Gazelle, for generating bzl_library targets
-load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
-
-go_rules_dependencies()
-
-go_register_toolchains(version = "1.20.5")
-
-gazelle_dependencies()
-
 # Used for Bazel CI
 http_archive(
     name = "bazelci_rules",

dotnet/gazelle_setup.bzl

@@ -0,0 +1,4 @@
+load("@rules_dotnet//:go_deps.bzl", "go_deps")
+
+def rules_dotnet_gazelle_setup():
+    go_deps()

dotnet/repositories.bzl

@@ -44,6 +44,25 @@ def rules_dotnet_dependencies():
         sha256 = "3a561c99e7bdbe9173aa653fd579fe849f1d8d67395780ab4770b1f381431d51",
     )
 
+def rules_dotnet_gazelle_dependencies():
+    http_archive(
+        name = "io_bazel_rules_go",
+        sha256 = "6dc2da7ab4cf5d7bfc7c949776b1b7c733f05e56edc4bcd9022bb249d2e2a996",
+        urls = [
+            "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.39.1/rules_go-v0.39.1.zip",
+            "https://github.com/bazelbuild/rules_go/releases/download/v0.39.1/rules_go-v0.39.1.zip",
+        ],
+    )
+
+    http_archive(
+        name = "bazel_gazelle",
+        sha256 = "727f3e4edd96ea20c29e8c2ca9e8d2af724d8c7778e7923a854b2c80952bc405",
+        urls = [
+            "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.30.0/bazel-gazelle-v0.30.0.tar.gz",
+            "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.30.0/bazel-gazelle-v0.30.0.tar.gz",
+        ],
+    )
+
 ########
 # Remaining content of the file is only used to support toolchains.
 ########

go.mod

@@ -0,0 +1,3 @@
+module github.com/bazelbuild/rules_dotnet
+
+go 1.20

go_deps.bzl

@@ -0,0 +1,2 @@
+def go_deps():
+    pass

internal_deps.bzl

@@ -20,23 +20,6 @@ def rules_dotnet_internal_deps():
         sha256 = "2401b1369ef44cc42f91dc94443ef491208dbd06da1e1e10b702d8c189f098e3",
     )
 
-    http_archive(
-        name = "io_bazel_rules_go",
-        sha256 = "278b7ff5a826f3dc10f04feaf0b70d48b68748ccd512d7f98bf442077f043fe3",
-        urls = [
-            "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.41.0/rules_go-v0.41.0.zip",
-            "https://github.com/bazelbuild/rules_go/releases/download/v0.41.0/rules_go-v0.41.0.zip",
-        ],
-    )
-
-    http_archive(
-        name = "bazel_gazelle",
-        sha256 = "d3fa66a39028e97d76f9e2db8f1b0c11c099e8e01bf363a923074784e451f809",
-        urls = [
-            "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.33.0/bazel-gazelle-v0.33.0.tar.gz",
-        ],
-    )
-
     http_archive(
         name = "bazel_skylib",
         sha256 = "f24ab666394232f834f74d19e2ff142b0af17466ea0c69a3f4c276ee75f6efce",

tidy.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -eou pipefail
+
+# To add a new go dependency, make the required changes to the go files (import and use) and then
+# run this file.
+
+cd "${BUILD_WORKSPACE_DIRECTORY}"
+
+bazel run @go_sdk//:bin/go -- mod tidy
+bazel run //:gazelle_update_repos
+bazel run //:gazelle