Index: devel/Makefile
===================================================================
--- devel/Makefile
+++ devel/Makefile
@@ -5546,6 +5546,7 @@
     SUBDIR += rubygem-interact
     SUBDIR += rubygem-io-like
     SUBDIR += rubygem-iobuffer
+    SUBDIR += rubygem-irb
     SUBDIR += rubygem-iso8601
     SUBDIR += rubygem-jaeger-client
     SUBDIR += rubygem-jammit
Index: devel/rubygem-irb/Makefile
===================================================================
--- /dev/null
+++ devel/rubygem-irb/Makefile
@@ -0,0 +1,21 @@
+# $FreeBSD$
+
+PORTNAME=	irb
+PORTVERSION=	1.0.0
+CATEGORIES=	devel rubygems
+MASTER_SITES=	RG
+
+MAINTAINER=	meta@FreeBSD.org
+COMMENT=	Interactive Ruby
+
+LICENSE=	BSD2CLAUSE
+LICENSE_FILE=	${WRKSRC}/LICENSE.txt
+
+USES=		gem
+USE_RUBY=	yes
+
+# irb executable is installed by ruby port
+post-install:
+	${RM} ${STAGEDIR}${PREFIX}/bin/irb
+
+.include <bsd.port.mk>
Index: devel/rubygem-irb/distinfo
===================================================================
--- /dev/null
+++ devel/rubygem-irb/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1557733732
+SHA256 (rubygem/irb-1.0.0.gem) = 99b5b043c2eb4becdb68fb173f2e4f0673ea205b10bdaf11bf0e006d21422da0
+SIZE (rubygem/irb-1.0.0.gem) = 49664
Index: devel/rubygem-irb/pkg-descr
===================================================================
--- /dev/null
+++ devel/rubygem-irb/pkg-descr
@@ -0,0 +1,4 @@
+IRB stands for "interactive Ruby" and is a tool to interactively execute
+Ruby expressions read from the standard input.
+
+WWW: http://rubygems.org/gems/irb