Allow the proto! proc impl to be built on bazel

PiperOrigin-RevId: 738871947

Author: protobuf-github-bot

Cargo.bazel.lock

@@ -1,5 +1,5 @@
 {
-  "checksum": "422d164988d36886ae9aef8b60e233d67aac121356b66f1452c469f912cc0148",
+  "checksum": "1c2d7323790fa56253530c4ad5ac09639afa6de134dfeae8959f863aab3a6631",
   "crates": {
     "aho-corasick 1.1.2": {
       "name": "aho-corasick",
@@ -125,7 +125,15 @@
             {
               "id": "googletest 0.12.0",
               "target": "googletest"
-            }
+            },
+            {
+              "id": "quote 1.0.33",
+              "target": "quote"
+            },
+            {
+              "id": "syn 2.0.43",
+              "target": "syn"
+             }
           ],
           "selects": {}
         },
@@ -919,13 +927,55 @@
             "clone-impls",
             "default",
             "derive",
-            "full",
             "parsing",
             "printing",
             "proc-macro",
             "quote"
           ],
-          "selects": {}
+          "selects": {
+            "aarch64-apple-darwin": [
+              "full"
+            ],
+            "aarch64-pc-windows-msvc": [
+              "full"
+            ],
+            "aarch64-unknown-linux-gnu": [
+              "full"
+            ],
+            "aarch64-unknown-nixos-gnu": [
+              "full"
+            ],
+            "arm-unknown-linux-gnueabi": [
+              "full"
+            ],
+            "i686-pc-windows-msvc": [
+              "full"
+            ],
+            "i686-unknown-linux-gnu": [
+              "full"
+            ],
+            "powerpc-unknown-linux-gnu": [
+              "full"
+            ],
+            "s390x-unknown-linux-gnu": [
+              "full"
+            ],
+            "x86_64-apple-darwin": [
+              "full"
+            ],
+            "x86_64-pc-windows-msvc": [
+              "full"
+            ],
+            "x86_64-unknown-freebsd": [
+              "full"
+            ],
+            "x86_64-unknown-linux-gnu": [
+              "full"
+            ],
+            "x86_64-unknown-nixos-gnu": [
+              "full"
+            ]
+          }
         },
         "deps": {
           "common": [
@@ -1108,7 +1158,9 @@
   },
   "direct_deps": [
     "googletest 0.12.0",
-    "paste 1.0.14"
+    "paste 1.0.14",
+    "quote 1.0.33",
+    "syn 2.0.43"
   ],
   "direct_dev_deps": []
 }

Cargo.lock

@@ -140,6 +140,14 @@ crate.spec(
     package = "paste",
     version = ">=1",
 )
+crate.spec(
+    package = "quote",
+    version = ">=1",
+)
+crate.spec(
+    package = "syn",
+    version = ">=2",
+)
 crate.from_specs()
 use_repo(crate, crate_index = "crates")
 

MODULE.bazel

@@ -273,6 +273,12 @@ crates_repository(
         "paste": crate.spec(
             version = ">=1",
         ),
+        "quote": crate.spec(
+            version = ">=1",
+        ),
+        "syn": crate.spec(
+            version = ">=2",
+        ),
     },
 )
 

WORKSPACE

@@ -1,10 +1,24 @@
-# This directory contains the implementation of the proto! macro as a proc macro.
-# It has not yet been made to work with bazel and so no targets are defined here.
+# An alternate implementation of the proto! macro as a proc macro instead of macro_rules.
+
+# This is only in a separate directory due to the top level package being part of the 'core'
+# component, and it not being a resolved decision if we want to add all deps of this proc macro to
+# the core component.
 
 load("@rules_pkg//pkg:mappings.bzl", "pkg_filegroup", "pkg_files", "strip_prefix")
+load("@rules_rust//rust:defs.bzl", "rust_proc_macro")
 
 PROC_MACRO_SRCS = ["proto_proc_macro_impl.rs"]
 
+rust_proc_macro(
+    name = "proto_proc_macro",
+    srcs = PROC_MACRO_SRCS,
+    visibility = ["//rust/test:__subpackages__"],
+    deps = [
+        "@crate_index//:quote",
+        "@crate_index//:syn",
+    ],
+)
+
 pkg_files(
     name = "rust_protobuf_macros_src",
     srcs = PROC_MACRO_SRCS,

rust/proto_proc_macro/BUILD

@@ -484,6 +484,42 @@ rust_test(
     ],
 )
 
+rust_test(
+    name = "proto_proc_macro_cpp_test",
+    srcs = ["proto_proc_macro_test.rs"],
+    aliases = {
+        "//rust:protobuf_cpp": "protobuf",
+    },
+    proc_macro_deps = [
+        "//rust/proto_proc_macro",
+    ],
+    deps = [
+        "//rust:protobuf_cpp",
+        "//rust/test:map_unittest_cpp_rust_proto",
+        "//rust/test:unittest_cpp_rust_proto",
+        "@crate_index//:googletest",
+    ],
+)
+
+rust_test(
+    name = "proto_proc_macro_upb_test",
+    srcs = ["proto_proc_macro_test.rs"],
+    aliases = {
+        "//rust:protobuf_upb": "protobuf",
+        "//rust:protobuf_gtest_matchers_upb": "protobuf_gtest_matchers",
+    },
+    proc_macro_deps = [
+        "//rust/proto_proc_macro",
+    ],
+    deps = [
+        "//rust:protobuf_gtest_matchers_upb",
+        "//rust:protobuf_upb",
+        "//rust/test:map_unittest_upb_rust_proto",
+        "//rust/test:unittest_upb_rust_proto",
+        "@crate_index//:googletest",
+    ],
+)
+
 rust_test(
     name = "gtest_matchers_cpp_test",
     srcs = ["gtest_matchers_test.rs"],