[bazel] Add support for new libraries (#1760)

Author: keith

BUILD.bazel

@@ -35,6 +35,12 @@ swift_syntax_library(
         ":SwiftDiagnostics",
         ":SwiftOperators",
         ":SwiftParser",
+    ],
+)
+
+swift_syntax_library(
+    name = "SwiftSyntaxMacroExpansion",
+    deps = [
         ":SwiftSyntax",
         ":SwiftSyntaxMacros",
     ],
@@ -102,3 +108,24 @@ swift_syntax_library(
         ":SwiftSyntax",
     ],
 )
+
+swift_syntax_library(
+    name = "SwiftSyntaxMacrosTestSupport",
+    testonly = True,
+    deps = [
+        ":SwiftDiagnostics",
+        ":SwiftParser",
+        ":SwiftSyntaxMacros",
+        ":_SwiftSyntaxTestSupport",
+    ],
+)
+
+swift_syntax_library(
+    name = "_SwiftSyntaxTestSupport",
+    testonly = True,
+    deps = [
+        ":SwiftBasicFormat",
+        ":SwiftSyntax",
+        ":SwiftSyntaxBuilder",
+    ],
+)

utils/bazel/swift_syntax_library.bzl

@@ -3,7 +3,7 @@
 load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
 load(":opt_wrapper.bzl", "opt_wrapper")
 
-def swift_syntax_library(name, deps):
+def swift_syntax_library(name, deps, testonly = False):
     swift_library(
         name = name,
         srcs = native.glob(
@@ -13,9 +13,11 @@ def swift_syntax_library(name, deps):
         ),
         module_name = name,
         deps = deps,
+        testonly = testonly,
     )
 
     opt_wrapper(
         name = name + "_opt",
         dep = name,
+        testonly = testonly,
     )