fix(deps): bump go-yaml to fix block and folded scalar round-trips (#1321)

Bumps go-yaml to its main branch and drops the workaround it makes obsolete, matching https://github.com/go-gitea/gitea/pull/39787.

- go-yaml main keeps block scalar indentation indicators (https://github.com/yaml/go-yaml/pull/414), so values with a leading newline no longer need quoting
- `config edit` no longer wraps lines, because go-yaml still wraps more-indented lines of folded scalars and turns a space into a newline

Reviewed-on: https://gitea.com/gitea/runner/pulls/1321
Reviewed-by: bircni <[email protected]>
Co-authored-by: silverwind <[email protected]>

internal/pkg/config/edit.go

@@ -312,29 +312,9 @@ func allScalars(nodes []*yaml.Node) bool {
 	return true
 }
 
-// quoteLeadingNewlines keeps a scalar starting with a newline out of block style, whose indentation indicator the encoder drops.
-// TODO: remove once https://github.com/yaml/go-yaml/pull/396 is released.
-func quoteLeadingNewlines(node *yaml.Node) {
-	if node.Kind == yaml.ScalarNode && strings.HasPrefix(node.Value, "\n") {
-		node.Style = yaml.DoubleQuotedStyle
-	}
-	for _, child := range node.Content {
-		quoteLeadingNewlines(child)
-	}
-}
-
+// encodeYAML never wraps lines, go-yaml wraps more-indented lines of folded scalars until https://github.com/yaml/go-yaml/pull/441 is released.
 func encodeYAML(node *yaml.Node) ([]byte, error) {
-	quoteLeadingNewlines(node)
-	var buf bytes.Buffer
-	encoder := yaml.NewEncoder(&buf)
-	encoder.SetIndent(2)
-	if err := encoder.Encode(node); err != nil {
-		return nil, err
-	}
-	if err := encoder.Close(); err != nil {
-		return nil, err
-	}
-	return buf.Bytes(), nil
+	return yaml.Dump(node, yaml.WithV3Defaults(), yaml.WithIndent(2), yaml.WithLineWidth(-1))
 }
 
 // restoreLayout re-applies the spacing the encoder drops: the blank lines between

internal/pkg/config/edit_test.go

@@ -280,6 +280,12 @@ func TestEditValuesPreservesFileText(t *testing.T) {
 			edit:    func(file string) error { return SetValue(file, "runner.capacity", "4") },
 			added:   "runner:\n  capacity: 4\n",
 		},
+		{
+			name:    "folded scalar with a long more-indented line",
+			content: []byte("runner:\n  envs:\n    FOLDED: >\n      begin\n        a more-indented line that is long enough for an encoder wrapping at 80 columns to break\n      end\n"),
+			edit:    func(file string) error { return SetValue(file, "runner.capacity", "4") },
+			added:   "  capacity: 4\n",
+		},
 	}
 
 	for _, tc := range tests {