Preserve multiline sigs when translating to RBS

Gemfile.lock

@@ -4,7 +4,7 @@ PATH
     spoom (1.8.3)
       erubi (>= 1.10.0)
       prism (>= 0.28.0)
-      rbi (>= 0.3.14)
+      rbi (>= 0.3.15)
       rbs (>= 4.0.0.dev.5)
       rexml (>= 3.2.6)
       sorbet-static-and-runtime (>= 0.5.10187)
@@ -57,7 +57,7 @@ GEM
     racc (1.8.1)
     rainbow (3.1.1)
     rake (13.4.2)
-    rbi (0.3.14)
+    rbi (0.3.15)
       prism (~> 1.0)
       rbs (>= 4.0.1)
     rbs (4.0.3)

lib/spoom/cli/srb/sigs.rb

@@ -17,6 +17,10 @@ class Sigs < Thor
           aliases: :p,
           desc: "Use positional names when translating from RBI to RBS",
           default: true
+        option :preserve_multiline_signatures,
+          type: :boolean,
+          desc: "Preserve multiline sig formatting when translating from RBI to RBS",
+          default: true
         option :include_rbi_files, type: :boolean, desc: "Include RBI files", default: false
         option :max_line_length, type: :numeric, desc: "Max line length (pass 0 to disable)", default: 120
         option :translate_generics, type: :boolean, desc: "Translate generics", default: false
@@ -53,6 +57,7 @@ def translate(*paths)
                 contents,
                 file: file,
                 positional_names: options[:positional_names],
+                preserve_multiline_signatures: options[:preserve_multiline_signatures],
                 max_line_length: max_line_length,
                 translate_generics: options[:translate_generics],
                 translate_helpers: options[:translate_helpers],

lib/spoom/sorbet/translate.rb

@@ -30,13 +30,17 @@ def strip_sorbet_sigs(ruby_contents, file:)
         #|   String,
         #|   file: String,
         #|   ?positional_names: bool,
+        #|   ?preserve_multiline_signatures: bool,
         #|   ?max_line_length: Integer?,
         #|   ?translate_generics: bool,
         #|   ?translate_helpers: bool,
         #|   ?translate_abstract_methods: bool
         #| ) -> String
         def sorbet_sigs_to_rbs_comments(
-          ruby_contents, file:, positional_names: true, max_line_length: nil,
+          ruby_contents, file:,
+          positional_names: true,
+          preserve_multiline_signatures: true,
+          max_line_length: nil,
           translate_generics: true,
           translate_helpers: true,
           translate_abstract_methods: true
@@ -45,6 +49,7 @@ def sorbet_sigs_to_rbs_comments(
             ruby_contents,
             file: file,
             positional_names: positional_names,
+            preserve_multiline_signatures: preserve_multiline_signatures,
             max_line_length: max_line_length,
             translate_generics: translate_generics,
             translate_helpers: translate_helpers,

lib/spoom/sorbet/translate/sorbet_sigs_to_rbs_comments.rb

@@ -11,6 +11,7 @@ class SorbetSigsToRBSComments < Translator
         #|   String,
         #|   file: String,
         #|   positional_names: bool,
+        #|   ?preserve_multiline_signatures: bool,
         #|   ?max_line_length: Integer?,
         #|   ?translate_generics: bool,
         #|   ?translate_helpers: bool,
@@ -20,6 +21,7 @@ def initialize(
           ruby_contents,
           file:,
           positional_names:,
+          preserve_multiline_signatures: true,
           max_line_length: nil,
           translate_generics: true,
           translate_helpers: true,
@@ -34,6 +36,8 @@ def initialize(
           @extend_t_helpers = [] #: Array[Prism::CallNode]
           @extend_t_generics = [] #: Array[Prism::CallNode]
           @seen_mixes_in_class_methods = false #: bool
+
+          @preserve_multiline_signatures = preserve_multiline_signatures
           @max_line_length = max_line_length #: Integer?
 
           @translate_generics = translate_generics #: bool
@@ -75,7 +79,12 @@ def visit_def_node(node)
           last_sigs.each do |node, sig|
             next if sig.is_abstract && !@translate_abstract_methods
 
-            out = rbs_print(node.location.start_column) do |printer|
+            preserve_multiline_signatures = !!(@preserve_multiline_signatures && sig.loc&.multiline?)
+
+            out = rbs_print(
+              node.location.start_column,
+              preserve_multiline_signatures: preserve_multiline_signatures,
+            ) do |printer|
               printer.print_method_sig(rbi_node, sig)
             end
             @rewriter << Source::Replace.new(node.location.start_offset, node.location.end_offset, out)
@@ -204,7 +213,7 @@ def visit_attr(node)
           rbi_node = builder.tree.nodes.first #: as RBI::Attr
 
           last_sigs.each do |node, sig|
-            out = rbs_print(node.location.start_column) do |printer|
+            out = rbs_print(node.location.start_column, preserve_multiline_signatures: false) do |printer|
               printer.print_attr_sig(rbi_node, sig)
             end
             @rewriter << Source::Replace.new(node.location.start_offset, node.location.end_offset, out)
@@ -387,10 +396,16 @@ def collect_last_sigs
           last_sigs
         end
 
-        #: (Integer) { (RBI::RBSPrinter) -> void } -> String
-        def rbs_print(indent, &block)
+        #: (Integer, preserve_multiline_signatures: bool) { (RBI::RBSPrinter) -> void } -> String
+        def rbs_print(indent, preserve_multiline_signatures:, &block)
           out = StringIO.new
-          p = RBI::RBSPrinter.new(out: out, positional_names: @positional_names, max_line_length: @max_line_length)
+
+          p = RBI::RBSPrinter.new(
+            out: out,
+            positional_names: @positional_names,
+            max_line_length: @max_line_length,
+            force_multiline_signatures: preserve_multiline_signatures,
+          )
           block.call(p)
           string = out.string
 

rbi/spoom.rbi

@@ -2949,13 +2949,14 @@ module Spoom::Sorbet::Translate
         ruby_contents: ::String,
         file: ::String,
         positional_names: T::Boolean,
+        preserve_multiline_signatures: T::Boolean,
         max_line_length: T.nilable(::Integer),
         translate_generics: T::Boolean,
         translate_helpers: T::Boolean,
         translate_abstract_methods: T::Boolean
       ).returns(::String)
     end
-    def sorbet_sigs_to_rbs_comments(ruby_contents, file:, positional_names: T.unsafe(nil), max_line_length: T.unsafe(nil), translate_generics: T.unsafe(nil), translate_helpers: T.unsafe(nil), translate_abstract_methods: T.unsafe(nil)); end
+    def sorbet_sigs_to_rbs_comments(ruby_contents, file:, positional_names: T.unsafe(nil), preserve_multiline_signatures: T.unsafe(nil), max_line_length: T.unsafe(nil), translate_generics: T.unsafe(nil), translate_helpers: T.unsafe(nil), translate_abstract_methods: T.unsafe(nil)); end
 
     sig { params(ruby_contents: ::String, file: ::String).returns(::String) }
     def strip_sorbet_sigs(ruby_contents, file:); end
@@ -3324,13 +3325,14 @@ class Spoom::Sorbet::Translate::SorbetSigsToRBSComments < ::Spoom::Sorbet::Trans
       ruby_contents: ::String,
       file: ::String,
       positional_names: T::Boolean,
+      preserve_multiline_signatures: T::Boolean,
       max_line_length: T.nilable(::Integer),
       translate_generics: T::Boolean,
       translate_helpers: T::Boolean,
       translate_abstract_methods: T::Boolean
     ).void
   end
-  def initialize(ruby_contents, file:, positional_names:, max_line_length: T.unsafe(nil), translate_generics: T.unsafe(nil), translate_helpers: T.unsafe(nil), translate_abstract_methods: T.unsafe(nil)); end
+  def initialize(ruby_contents, file:, positional_names:, preserve_multiline_signatures: T.unsafe(nil), max_line_length: T.unsafe(nil), translate_generics: T.unsafe(nil), translate_helpers: T.unsafe(nil), translate_abstract_methods: T.unsafe(nil)); end
 
   sig { override.params(node: ::Prism::CallNode).void }
   def visit_call_node(node); end
@@ -3375,8 +3377,14 @@ class Spoom::Sorbet::Translate::SorbetSigsToRBSComments < ::Spoom::Sorbet::Trans
   sig { void }
   def delete_extend_t_helpers; end
 
-  sig { params(indent: ::Integer, block: T.proc.params(arg0: ::RBI::RBSPrinter).void).returns(::String) }
-  def rbs_print(indent, &block); end
+  sig do
+    params(
+      indent: ::Integer,
+      preserve_multiline_signatures: T::Boolean,
+      block: T.proc.params(arg0: ::RBI::RBSPrinter).void
+    ).returns(::String)
+  end
+  def rbs_print(indent, preserve_multiline_signatures:, &block); end
 
   sig { params(node: ::Prism::CallNode).void }
   def visit_attr(node); end