[ruby/reline] Support isearch-terminators

https://github.com/ruby/reline/commit/a7922da16b

lib/reline/config.rb

@@ -38,6 +38,7 @@ class Reline::Config
     vi-ins-mode-icon
     emacs-mode-string
     enable-bracketed-paste
+    isearch-terminators
   }
   VARIABLE_NAME_SYMBOLS = VARIABLE_NAMES.map { |v| :"#{v.tr(?-, ?_)}" }
   VARIABLE_NAME_SYMBOLS.each do |v|
@@ -238,7 +239,7 @@ class Reline::Config
     when 'completion-query-items'
       @completion_query_items = value.to_i
     when 'isearch-terminators'
-      @isearch_terminators = instance_eval(value)
+      @isearch_terminators = retrieve_string(value)
     when 'editing-mode'
       case value
       when 'emacs'

lib/reline/line_editor.rb

@@ -1593,9 +1593,11 @@ class Reline::LineEditor
     searcher = generate_searcher
     searcher.resume(key)
     @searching_prompt = "(reverse-i-search)`': "
+    termination_keys = ["\C-j".ord]
+    termination_keys.concat(@config.isearch_terminators&.chars&.map(&:ord)) if @config.isearch_terminators
     @waiting_proc = ->(k) {
       case k
-      when "\C-j".ord
+      when *termination_keys
         if @history_pointer
           buffer = Reline::HISTORY[@history_pointer]
         else

test/reline/test_key_actor_emacs.rb

@@ -1894,6 +1894,36 @@ class Reline::KeyActor::Emacs::Test < Reline::TestCase
     assert_cursor_max(0)
   end
 
+  def test_search_history_with_isearch_terminator
+    @config.read_lines(<<~LINES.split(/(?<=\n)/))
+      set isearch-terminators "XYZ"
+    LINES
+    Reline::HISTORY.concat([
+      '1235', # old
+      '12aa',
+      '1234' # new
+    ])
+    assert_line('')
+    assert_byte_pointer_size('')
+    assert_cursor(0)
+    assert_cursor_max(0)
+    input_keys("\C-r12a")
+    assert_line('12aa')
+    assert_byte_pointer_size('')
+    assert_cursor(0)
+    assert_cursor_max(0) # doesn't determine yet
+    input_keys('Y')
+    assert_line('12aa')
+    assert_byte_pointer_size('')
+    assert_cursor(0)
+    assert_cursor_max(4)
+    input_keys('x')
+    assert_line('x12aa')
+    assert_byte_pointer_size('x')
+    assert_cursor(1)
+    assert_cursor_max(5)
+  end
+
   def test_em_set_mark_and_em_exchange_mark
     input_keys('aaa bbb ccc ddd')
     assert_byte_pointer_size('aaa bbb ccc ddd')