remove skylib dep

Author: keith

clang_tidy/clang_tidy_test.bzl

@@ -1,10 +1,13 @@
 """A test rule to run clang-tidy"""
 
-load("@bazel_skylib//lib:shell.bzl", "shell")
 load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
 load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain")
 load(":clang_tidy.bzl", "deps_flags", "is_c_translation_unit", "rule_sources", "safe_flags", "toolchain_flags")
 
+def _quote(s):
+    # Copied from https://github.com/bazelbuild/bazel-skylib/blob/main/lib/shell.bzl
+    return "'" + s.replace("'", "'\\''") + "'"
+
 # Tests run with a different directory structure than normal compiles. This
 # fixes up include paths or any other arguments that are sensitive to this
 def _fix_argument_path(ctx, arg):
@@ -77,8 +80,8 @@ fi
             output = ctx.outputs.executable.path,
             c_sources = " ".join([x.short_path for x in srcs if is_c_translation_unit(x, ctx.attr.tags)]),
             cxx_sources = " ".join([x.short_path for x in srcs if not is_c_translation_unit(x, ctx.attr.tags)]),
-            c_flags = " ".join([shell.quote(_fix_argument_path(ctx, x)) for x in ccinfo_copts + c_flags]),
-            cxx_flags = " ".join([shell.quote(_fix_argument_path(ctx, x)) for x in ccinfo_copts + cxx_flags]),
+            c_flags = " ".join([_quote(_fix_argument_path(ctx, x)) for x in ccinfo_copts + c_flags]),
+            cxx_flags = " ".join([_quote(_fix_argument_path(ctx, x)) for x in ccinfo_copts + cxx_flags]),
         ),
     )