commit 3d12053055fe5186cd4def0d9b9d318436cf58fc
Author: Bradley T. Hughes <bradleythughes@fastmail.fm>
Date:   Sun Oct 30 21:22:35 2016 +0000

    Add USES=node[:args] for specifying a dependency on Node.js
    
    This is based lightly on Mk/Uses/python.mk. Add build, run, test
    dependencies based on the arguments received. If the port does not
    explicitly set a version, use a default which can be overridden by the
    user.

diff --git Mk/Uses/node.mk Mk/Uses/node.mk
new file mode 100644
index 0000000..24b0961
--- /dev/null
+++ Mk/Uses/node.mk
@@ -0,0 +1,79 @@
+# $FreeBSD$
+#
+# Provide support for Node.js
+#
+# Feature:      node
+# Usage:        USES=node, or USES=node:args
+# Valid ARGS:   <version>, build, run, test
+#
+# version	The major version of Node.js required by your port. If omitted,
+#		the default version is used. The user can choose which Node.js
+#		version to use as the default using:
+#
+# DEFAULT_VERSIONS+=	node=<major version>
+#
+# build		Indicates that Python is needed at build time and adds
+#		it to BUILD_DEPENDS.
+# run		Indicates that Python is needed at run time and adds
+#		it to RUN_DEPENDS.
+# test		Indicates that Python is needed at test time and adds
+#		it to TEST_DEPENDS.
+#
+# If build, run and test are omitted, Node.js will be added as BUILD_DEPENDS,
+# RUN_DEPENDS and TEST_DEPENDS.
+#
+# MAINTAINER:	bradleythughes@fastmail.fm
+
+.if !defined(_INCLUDE_USES_NODE_MK)
+_INCLUDE_USES_NODE_MK=    yes
+
+
+# Make sure that no dependency or some other environment variable
+# pollutes the build/run dependency detection
+.undef _NODE_BUILD_DEP
+.undef _NODE_RUN_DEP
+.undef _NODE_TEST_DEP
+_NODE_ARGS=           ${node_ARGS:S/,/ /g}
+.if ${_NODE_ARGS:Mbuild}
+_NODE_BUILD_DEP=      yes
+_NODE_ARGS:=          ${_NODE_ARGS:Nbuild}
+.endif
+.if ${_NODE_ARGS:Mrun}
+_NODE_RUN_DEP=        yes
+_NODE_ARGS:=          ${_NODE_ARGS:Nrun}
+.endif
+.if ${_NODE_ARGS:Mtest}
+_NODE_TEST_DEP=       yes
+_NODE_ARGS:=          ${_NODE_ARGS:Ntest}
+.endif
+
+# The port does not specify a build, run or test dependency, assume all are
+# required.
+.if !defined(_NODE_BUILD_DEP) && !defined(_NODE_RUN_DEP) && \
+    !defined(_NODE_TEST_DEP) && !defined(NODE_NO_DEPENDS)
+_NODE_BUILD_DEP=      yes
+_NODE_RUN_DEP=        yes
+_NODE_TEST_DEP=       yes
+.endif
+
+
+# The remaining argument, if any, is the Node.js major version to use.
+_NODE_VERSION=	${_NODE_ARGS}
+.if empty(_NODE_VERSION)
+_NODE_VERSION=	${NODE_DEFAULT}
+.endif
+
+
+# Add build, run, and test dependencies as required.
+.if defined(_NODE_BUILD_DEP)
+BUILD_DEPENDS+=	node${_NODE_VERSION}>=${_NODE_VERSION}:www/node${_NODE_VERSION}
+.endif
+.if defined(_NODE_RUN_DEP)
+RUN_DEPENDS+=	node${_NODE_VERSION}>=${_NODE_VERSION}:www/node${_NODE_VERSION}
+.endif
+.if defined(_NODE_TEST_DEP)
+TEST_DEPENDS+=	node${_NODE_VERSION}>=${_NODE_VERSION}:www/node${_NODE_VERSION}
+.endif
+
+
+.endif # _INCLUDE_USES_NODE_MK
diff --git Mk/bsd.default-versions.mk Mk/bsd.default-versions.mk
index 4669c39..a7c924f 100644
--- Mk/bsd.default-versions.mk
+++ Mk/bsd.default-versions.mk
@@ -15,7 +15,7 @@ _INCLUDE_BSD_DEFAULT_VERSIONS_MK=	yes
 
 LOCALBASE?=	/usr/local
 
-.for lang in APACHE BDB FIREBIRD FPC GCC GHOSTSCRIPT LINUX LUA MYSQL PERL6 \
+.for lang in APACHE BDB FIREBIRD FPC GCC GHOSTSCRIPT LINUX LUA MYSQL NODE PERL6 \
 	PGSQL PHP PYTHON PYTHON2 PYTHON3 RUBY SSL TCLTK
 .if defined(${lang}_DEFAULT)
 WARNING+=	"The variable ${lang}_DEFAULT is set and it should only be defined through DEFAULT_VERSIONS+=${lang:tl}=${${lang}_DEFAULT} in /etc/make.conf"
@@ -51,6 +51,8 @@ WARNING+=		"OVERRIDE_LINUX_BASE_PORT is deprecated, please use DEFAULT_VERSIONS+
 LUA_DEFAULT?=		5.2
 # Possible values: 5.1, 5.5, 5.6, 5.7, 5.5m, 10.0m, 10.1m, 5.5p, 5.6p
 MYSQL_DEFAULT?=		5.6
+# Possible values: 012, 4, 6, 7
+NODE_DEFAULT?=		7
 # Possible values: 5.18, 5.20, 5.22, devel
 .if !exists(${LOCALBASE}/bin/perl) || (!defined(_PORTS_ENV_CHECK) && \
     defined(PACKAGE_BUILDING))