dartsass: Add silenceDeprecations option

Fixes #13045

resources/resource_transformers/tocss/dartsass/client.go

@@ -74,8 +74,10 @@ func New(fs *filesystems.SourceFilesystem, rs *resources.Spec) (*Client, error)
 			case godartsass.LogEventTypeDebug:
 				// Log as Info for now, we may adjust this if it gets too chatty.
 				infol.Log(logg.String(message))
+			case godartsass.LogEventTypeDeprecated:
+				warnl.Logf("DEPRECATED [%s]: %s", event.DeprecationType, message)
 			default:
-				// The rest are either deprecations or @warn statements.
+				// The rest are @warn statements.
 				warnl.Log(logg.String(message))
 			}
 		},
@@ -151,6 +153,11 @@ type Options struct {
 	//     @use "hugo:vars";
 	//     $color: vars.$color;
 	Vars map[string]any
+
+	// Deprecations IDs in this slice will be silenced.
+	// The IDs can be found in the Dart Sass log output, e.g. "import" in
+	//    WARN  Dart Sass: DEPRECATED [import].
+	SilenceDeprecations []string
 }
 
 func decodeOptions(m map[string]any) (opts Options, err error) {

resources/resource_transformers/tocss/dartsass/dartsass_integration_test.go

@@ -605,3 +605,38 @@ module hugo-github-issue-12849
 
 	b.AssertFileContent("public/index.html", ".foo{color:red}.bar{color:green}")
 }
+
+func TestIgnoreDeprecationWarnings(t *testing.T) {
+	t.Parallel()
+	if !dartsass.Supports() {
+		t.Skip()
+	}
+
+	files := `
+-- hugo.toml --
+disableKinds = ['page','section','rss','sitemap','taxonomy','term']
+-- assets/scss/main.scss --
+@import "moo";
+-- node_modules/foo/_moo.scss --
+$moolor: #fff;
+
+moo {
+  color: $moolor;
+}
+-- config.toml --
+-- layouts/index.html --
+{{ $cssOpts := (dict "includePaths" (slice "node_modules/foo") "transpiler" "dartsass" ) }}
+{{ $r := resources.Get "scss/main.scss" |  toCSS $cssOpts  | minify  }}
+T1: {{ $r.Content }}
+	`
+
+	b := hugolib.Test(t, files, hugolib.TestOptOsFs(), hugolib.TestOptWarn())
+	b.AssertLogContains("Dart Sass: DEPRECATED [import]")
+	b.AssertFileContent("public/index.html", `moo{color:#fff}`)
+
+	files = strings.ReplaceAll(files, `"transpiler" "dartsass"`, `"transpiler" "dartsass" "silenceDeprecations" (slice "import")`)
+
+	b = hugolib.Test(t, files, hugolib.TestOptOsFs(), hugolib.TestOptWarn())
+	b.AssertLogContains("! Dart Sass: DEPRECATED [import]")
+	b.AssertFileContent("public/index.html", `moo{color:#fff}`)
+}

resources/resource_transformers/tocss/dartsass/transform.go

@@ -89,6 +89,7 @@ func (t *transform) Transform(ctx *resources.ResourceTransformationCtx) error {
 		OutputStyle:             godartsass.ParseOutputStyle(opts.OutputStyle),
 		EnableSourceMap:         opts.EnableSourceMap,
 		SourceMapIncludeSources: opts.SourceMapIncludeSources,
+		SilenceDeprecations:     opts.SilenceDeprecations,
 	}
 
 	// Append any workDir relative include paths