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ruby-changes:58868

From: aycabta <ko1@a...>
Date: Thu, 21 Nov 2019 02:54:50 +0900 (JST)
Subject: [ruby-changes:58868] eee70b41d4 (master): Add a warning message and --legacy of an alias of --singleline

https://git.ruby-lang.org/ruby.git/commit/?id=eee70b41d4

From eee70b41d4c04caa06a68cc4847a600eb7322cb8 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Thu, 21 Nov 2019 02:44:15 +0900
Subject: Add a warning message and --legacy of an alias of --singleline


diff --git a/lib/irb/context.rb b/lib/irb/context.rb
index f529787..94def5f 100644
--- a/lib/irb/context.rb
+++ b/lib/irb/context.rb
@@ -82,6 +82,12 @@ module IRB https://github.com/ruby/ruby/blob/trunk/lib/irb/context.rb#L82
         case use_multiline?
         when nil
           if STDIN.tty? && IRB.conf[:PROMPT_MODE] != :INF_RUBY && !use_singleline?
+            # Both of multiline mode and singleline mode aren't specified.
+            puts <<~EOM
+              This version of IRB is drastically different from the previous version.
+              If you hit any issues, you can use "irb --legacy" to run the old version.
+              If you want to just erase this message, please use "irb --multiline".
+            EOM
             @io = ReidlineInputMethod.new
           else
             @io = nil
diff --git a/lib/irb/init.rb b/lib/irb/init.rb
index 11f3932..ebae371 100644
--- a/lib/irb/init.rb
+++ b/lib/irb/init.rb
@@ -161,7 +161,7 @@ module IRB # :nodoc: https://github.com/ruby/ruby/blob/trunk/lib/irb/init.rb#L161
         end
       when "--noinspect"
         @CONF[:INSPECT_MODE] = false
-      when "--singleline", "--readline"
+      when "--singleline", "--readline", "--legacy"
         @CONF[:USE_SINGLELINE] = true
       when "--nosingleline", "--noreadline"
         @CONF[:USE_SINGLELINE] = false
-- 
cgit v0.10.2


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