bazel: win: Explicitly link libcef.lib in cc_binary (see #3757)

Using cc_import + interface_library/shared_library to link libcef.lib causes
libcef.dll to be copied as a transitive dependency, leading to issues with
complex Bazel configs. Instead, we explicitly link libcef.lib in the binary
target (cc_binary + linkopts/additional_linker_inputs) and explicitly copy
libcef.dll to the target directory.

Author: magreenblatt

bazel/win/exe_helpers.bzl

@@ -47,10 +47,10 @@ def declare_exe(name, srcs, manifest_srcs, rc_file, resources_srcs, resources_de
         srcs = srcs,
         deps = [
             "@cef//:cef_wrapper",
-            "@cef//:cef",
             "@cef//:cef_sandbox",
         ] + deps,
         linkopts = [
+            "$(location @cef//:cef_lib)",
             "$(location :{})".format(res_target),
         ] + COMMON_LINKOPTS + linkopts,
         copts = COMMON_COPTS + select({
@@ -62,6 +62,7 @@ def declare_exe(name, srcs, manifest_srcs, rc_file, resources_srcs, resources_de
             "//conditions:default": COMMON_DEFINES_RELEASE,
         }) + local_defines,
         additional_linker_inputs = [
+            "@cef//:cef_lib",
             ":{}".format(res_target),
         ] + additional_linker_inputs,
         data = [

bazel/win/variables.bzl

@@ -6,10 +6,10 @@
 # Distribution DLLs.
 #
 
-# NOTE: libcef.dll is included via the //:cef dependency.
 DLLS = [
     "chrome_elf.dll",
     "d3dcompiler_47.dll",
+    "libcef.dll",
     "libEGL.dll",
     "libGLESv2.dll",
     "vk_swiftshader.dll",

tools/distrib/bazel/BUILD.bazel

@@ -274,29 +274,19 @@ alias(
     })
 )
 
-# Only available on Linux/Windows.
+# Only available on Linux.
 cc_import(
     name = "cef_dbg",
-    interface_library = select({
-        "@platforms//os:windows": "Debug/libcef.lib",
-        "//conditions:default": None,
-    }),
     shared_library = select({
         "@platforms//os:linux": "Debug/libcef.so",
-        "@platforms//os:windows": "Debug/libcef.dll",
         "//conditions:default": None,
     }),
 )
 
 cc_import(
     name = "cef_opt",
-    interface_library = select({
-        "@platforms//os:windows": "Release/libcef.lib",
-        "//conditions:default": None,
-    }),
     shared_library = select({
         "@platforms//os:linux": "Release/libcef.so",
-        "@platforms//os:windows": "Release/libcef.dll",
         "//conditions:default": None,
     }),
 )
@@ -309,6 +299,36 @@ alias(
     }),
 )
 
+# Only available on Windows.
+# Using cc_import + interface_library/shared_library to link libcef.lib causes
+# libcef.dll to be copied as a transitive dependency, leading to issues with
+# complex Bazel configs. Instead, we explicitly link libcef.lib in the binary
+# target (cc_binary + linkopts/additional_linker_inputs) and explicitly copy
+# libcef.dll to the target directory.
+alias(
+    name = "cef_lib_dbg",
+    actual = select({
+        "@platforms//os:windows": "Debug/libcef.lib",
+        "//conditions:default": None,
+    }),
+)
+
+alias(
+    name = "cef_lib_opt",
+    actual =  select({
+        "@platforms//os:windows": "Release/libcef.lib",
+        "//conditions:default": None,
+    }),
+)
+
+alias(
+    name = "cef_lib",
+    actual = select({
+       "@cef//:dbg": "@cef//:cef_lib_dbg",
+       "//conditions:default": "@cef//:cef_lib_opt",
+    }),
+)
+
 # Copy the CEF framework into the app bundle but do not link it. See
 # https://groups.google.com/g/cef-announce/c/Fith0A3kWtw/m/6ds_mJVMCQAJ
 # for background. Use `copy_directory` instead of `filegroup` to remove