Compile _vars.scss in //sass

Saves an extra copy, and allows use by mobile clients

qt/aqt/BUILD.bazel

@@ -3,20 +3,6 @@ load("@py_deps//:requirements.bzl", "requirement")
 load("@rules_python//python:packaging.bzl", "py_package", "py_wheel")
 load("//:defs.bzl", "anki_version")
 load("//ts:copy.bzl", "copy_files_into_group")
-load("//ts:compile_sass.bzl", "compile_sass")
-
-genrule(
-    name = "copy_vars",
-    srcs = ["//sass:_vars.scss"],
-    outs = ["_vars.scss"],
-    cmd = "cp $(SRCS) $(RULEDIR)",
-)
-
-compile_sass(
-    srcs = ["_vars.scss"],
-    group = "vars",
-    visibility = ["//visibility:private"],
-)
 
 genrule(
     name = "hooks_gen",
@@ -28,7 +14,7 @@ genrule(
 genrule(
     name = "extract_sass_vars",
     srcs = [
-        "_vars.css",
+        "//sass:_vars.css",
     ],
     outs = [
         "colors.py",

sass/BUILD.bazel

@@ -1,4 +1,5 @@
 load("@io_bazel_rules_sass//:defs.bzl", "sass_library")
+load("//ts:compile_sass.bzl", "compile_sass")
 
 sass_library(
     name = "base_lib",
@@ -71,10 +72,10 @@ sass_library(
     srcs = [
         "_button-mixins.scss",
     ],
+    visibility = ["//visibility:public"],
     deps = [
         "vars_lib",
     ],
-    visibility = ["//visibility:public"],
 )
 
 sass_library(
@@ -93,7 +94,8 @@ sass_library(
     visibility = ["//visibility:public"],
 )
 
-exports_files(
-    ["_vars.scss"],
+compile_sass(
+    srcs = ["_vars.scss"],
+    group = "vars_css",
     visibility = ["//visibility:public"],
 )