Disable PostCSS sourcemaps.

Refs #46.

This is blocking the Node.js upgrade past v12 and the feature doesn't really work anyways as it isn't currently linked properly in the output. See: bazelbuild/rules_postcss#73.

Hopefully a future migration to Parcel will put us back in a position where CSS sourcemaps can be used.

Author: dgp1130

packages/rules_prerender/css/css_binaries.bzl

@@ -12,7 +12,6 @@ load(":css_providers.bzl", "CssInfo")
 def css_binaries(
     name,
     deps,
-    sourcemap = True,
     testonly = None,
     visibility = None,
     tags = None,
@@ -23,14 +22,13 @@ def css_binaries(
     "binary", a new CSS file which bundles all the `@import` dependencies of that source.
 
     Returns:
-        `DefaultInfo`: Contains bundled CSS and sourcemaps.
+        `DefaultInfo`: Contains bundled CSS.
         `CssImportMapInfo`: Maps importable paths to generated CSS binary files.
 
     Args:
         name: Name of this target.
         deps: Dependencies of this target which provide `CssInfo` (generally
             `css_library()`).
-        sourcemap: Whether to generate sourcemaps (defaults to `True`).
         testonly: https://docs.bazel.build/versions/main/be/common-definitions.html#common-attributes
         visibility: https://docs.bazel.build/versions/main/be/common-definitions.html#common-attributes
         tags: https://docs.bazel.build/versions/main/be/common-definitions.html#common-attributes
@@ -40,7 +38,6 @@ def css_binaries(
         binary_name = "%s_binary_%s" % (name, index)
         _css_binary(
             name = binary_name,
-            sourcemap = sourcemap,
             dep = dep,
             testonly = testonly,
             tags = tags,
@@ -67,7 +64,6 @@ def css_binaries(
 def _css_binary(
     name,
     dep,
-    sourcemap,
     testonly = None,
     visibility = None,
     tags = None,
@@ -81,14 +77,13 @@ def _css_binary(
     an independent "binary", meaning multiple binaries can be generated by this macro.
 
     Returns:
-        `DefaultInfo`: Contains bundled CSS and sourcemaps.
+        `DefaultInfo`: Contains bundled CSS.
         `CssImportMapInfo`: Maps importable paths to generated CSS binary files.
 
     Args:
         name: Name of this target.
         dep: Dependency of this target which provides `CssInfo` (generally
             `css_library()`).
-        sourcemap: Whether to generate sourcemaps.
         testonly: https://docs.bazel.build/versions/main/be/common-definitions.html#common-attributes
         visibility: https://docs.bazel.build/versions/main/be/common-definitions.html#common-attributes
         tags: https://docs.bazel.build/versions/main/be/common-definitions.html#common-attributes
@@ -111,7 +106,9 @@ def _css_binary(
         name = binary,
         srcs = [dep],
         output_pattern = "{name}",
-        sourcemap = sourcemap,
+        # Sourcemaps must be turned off because they don't work on Node.js versions v14+.
+        # https://github.com/bazelbuild/rules_postcss/issues/73/
+        sourcemap = False,
         plugins = {
             "//tools/internal:postcss_import_plugin": IMPORT_PLUGIN_CONFIG,
         },

packages/rules_prerender/css/tests/dependencies/BUILD.bazel

@@ -12,8 +12,6 @@ diff_test(
 
 css_binaries(
     name = "bin",
-    # Disable sourcemaps to not confuse `diff_test()` with an extra file.
-    sourcemap = False,
     deps = [":foo"],
 )
 

packages/rules_prerender/css/tests/group/group_test.bzl

@@ -12,9 +12,7 @@ def _css_group_test_impl(ctx):
     default_info = analysistest.target_under_test(env)[DefaultInfo]
     expected_files = sets.make([
         "packages/rules_prerender/css/tests/group/lib1.css",
-        "packages/rules_prerender/css/tests/group/lib1.css.map",
         "packages/rules_prerender/css/tests/group/lib2.css",
-        "packages/rules_prerender/css/tests/group/lib2.css.map",
     ])
     actual_files = sets.make([file.short_path for file in default_info.files.to_list()])
     asserts.new_set_equals(env, expected_files, actual_files)

packages/rules_prerender/prerender_component_publish_files_test.ts

@@ -23,7 +23,6 @@ describe('prerender_component_publish_files()', () => {
             'script_dep.js.map',
             'script_dep.d.ts',
             'style.css',
-            'style.css.map',
             'component_resources', // from `resources` attribute.
         ]);