https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204577. And also the new www/etherpad-lite port based on USES=node:https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204578

# $FreeBSD$
#
# Provide support for NodeJS based projects
#
# Feature:	node
# Usage:	USES=node
#
# MAINTAINER: portmgr@FreeBSD.org

.if !defined(_INCLUDE_USES_NODE_MK)
_INCLUDE_USES_NODE_MK=	yes

FETCH_DEPENDS=	npm:${PORTSDIR}/www/npm
BUILD_DEPENDS=	npm:${PORTSDIR}/www/npm
RUN_DEPENDS=	node:${PORTSDIR}/www/node

.if defined(NODE_MODULES)
FETCH_DEPENDS+=	jq:${PORTSDIR}/textproc/jq
JQ_CMD=		${LOCALBASE}/bin/jq
.endif

.if defined(NODE_GH_ACCOUNT)
.  if ! defined(NODE_GH_PROJECT)
NODE_GH_PROJECT=	${PORTNAME}
.  endif
.  if ! defined(NODE_GH_TAGNAME)
NODE_GH_TAGNAME=	${DISTVERSIONFULL}
.  endif
_NODE_PROJECT_FILE=	${NODE_GH_ACCOUNT}-${NODE_GH_PROJECT}-${NODE_GH_TAGNAME}-node-project.tar.gz
_NODE_DIST_FILE=	${NODE_GH_PROJECT}-${NODE_GH_TAGNAME}.tar.gz
_NODE_DIR=		${NODE_GH_PROJECT}-${NODE_GH_TAGNAME}
_NODE_GH_URL=		https://codeload.github.com/${NODE_GH_ACCOUNT}/${NODE_GH_PROJECT}/tar.gz/${NODE_GH_TAGNAME}?dummy=/${_NODE_PROJECT_FILE}
.endif

# commands
NPM_CMD=		${LOCALBASE}/bin/npm
NODE_CMD=		${LOCALBASE}/bin/node

# variables
NPM_ENV+=		C=cc CXX=c++
NPM_FETCH_ARGS=		--loglevel warn --ignore-scripts
NPM_BUILD_ARGS=		--loglevel warn
NPM_SHRINKWRAP_ARGS=	--dev
SHRINKWRAP_FILE=	${FILESDIR}/npm-shrinkwrap.json
NODE_INSTALL_BASE=	${LOCALBASE}/share/node-projects
NODE_INSTALL_DIR=	${NODE_INSTALL_BASE}/${NODE_GH_ACCOUNT}-${NODE_GH_PROJECT}
_NODE_MASTER_SITE_BACKUP_URLS= ${MASTER_SITE_BACKUP}${_NODE_DIST_FILE}
.if defined(NODE_SRCDIR)
_NODE_DO_CD=node_modules/${NODE_SUBDIR}
.else
_NODE_DO_CD=.
.endif

makeshrinkwrap: do-fetch
	@cd ${_DISTDIR}; \
		${TAR} xzf ${_NODE_DIST_FILE} && \
		cd ${_NODE_DIR} && \
		cd ${_NODE_DO_CD} && \
		${NPM_ENV} ${NPM_CMD} shrinkwrap ${NPM_SHRINKWRAP_ARGS} && \
		${CP} npm-shrinkwrap.json ${SHRINKWRAP_FILE} && \
		cd ${_DISTDIR} && \
		${RM} -r ${_NODE_DIR}

do-fetch:
	@${MKDIR} ${_DISTDIR}
	@cd ${_DISTDIR}; \
		force_fetch=false; \
		for afile in ${FORCE_FETCH}; do \
		  afile=$${afile##*/}; \
		  if [ "x$$afile" = "x${_NODE_DIST_FILE}" ]; then \
		    force_fetch=true; \
		  fi; \
		done; \
		if [ ! -f ${_NODE_DIST_FILE} -o "$$force_fetch" = "true" ]; then \
		        ${RM} -rf ${_NODE_PROJECT_FILE} ${_NODE_DIR} ${_NODE_DIST_FILE}; \
		        for url in ${_NODE_MASTER_SITE_BACKUP_URLS}; do \
		          if ${ECHO_MSG} "=> Attempting to fetch ${PORTNAME} from the master backup site" && \
		             ${SETENV} ${FETCH_ENV} ${FETCH_CMD} ${FETCH_BEFORE_ARGS} $${url} ${FETCH_AFTER_ARGS}; then \
		             return 0; \
		        fi; \
		        done; \
		        for url in ${_NODE_GH_URL}; do \
		          if ${ECHO_MSG} "=> Attempting to fetch ${PORTNAME} from github" && \
		             ${SETENV} ${FETCH_ENV} ${FETCH_CMD} ${FETCH_BEFORE_ARGS} $${url} ${FETCH_AFTER_ARGS} && \
		             ${ECHO_MSG} "=> Extracting node project source" && \
		             ${EXTRACT_CMD} ${EXTRACT_BEFORE_ARGS} ${_NODE_PROJECT_FILE} ${EXTRACT_AFTER_ARGS} && \
		             ${RM} ${_NODE_PROJECT_FILE} && \
		             ${ECHO_MSG} "=> Preparing the node project" && \
		             cd ${_NODE_DIR} && \
		             ([ -z "${NODE_SRCDIR}" ] || \
		                (${MKDIR} node_modules && \
		                 ${MV} ${NODE_SRCDIR} node_modules/${NODE_SUBDIR} \
		                ) \
		             ) && cd ${_NODE_DO_CD} && \
		             for m in ${NODE_MODULES}; do \
		               ${ECHO} $${m} | ${SED} -E "s/([[:alnum:]]+):([[:digit:].]+)/{\"dependencies\":{\"\1\":\"\2\"}}/" > package-delta.json && \
		               ${JQ_CMD} -s '.[0] * .[1]' package.json package-delta.json > package-new.json && \
		               ${MV} package-new.json package.json && \
		               ${RM} package-delta.json; \
		             done && \
		             ([ -f "${SHRINKWRAP_FILE}" ] || \
		              ${ECHO} "Warning: no shrinkwrap file, you need to run 'make makeshrinkwrap' >&2") && \
		             ([ ! -f "${SHRINKWRAP_FILE}" ] || \
		              ${CP} ${SHRINKWRAP_FILE} npm-shrinkwrap.json) && \
		             ${ECHO_MSG} "=> Downloading the project dependencies" && \
		             ${NPM_ENV} ${NPM_CMD} install ${NPM_FETCH_ARGS} && \
		             cd ${_DISTDIR} && \
		             ${FIND} ${_NODE_DIR} -and -exec ${TOUCH} -h -d 1970-01-01T00:00:00Z {} + && \
		             ${FIND} ${_NODE_DIR} -print0 | sort -z | \
		                  ${TAR} czf ${_NODE_DIST_FILE} --options gzip:!timestamp --no-recursion --null -T - && \
		             ${RM} -rf ${_NODE_DIR}; then \
		             return 0; \
		        fi; \
		        done; \
		        ${ECHO_MSG} "=> Fetch failed for ${PORTNAME}"; \
		        exit 1; \
		fi;

do-build:
	@cd ${WRKSRC} && \
		cd ${_NODE_DO_CD} && \
		${NPM_ENV} ${NPM_CMD} rebuild ${NPM_BUILD_ARGS}

do-install:
	@${ECHO} "=> Staging ${PKGNAME}"
	@${MKDIR} ${STAGEDIR}${NODE_INSTALL_BASE}
	@${CP} -r ${WRKSRC} ${STAGEDIR}${NODE_INSTALL_DIR}
	@${RM} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name Makefile`
	@${RM} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name "*.bat"`
	@${RM} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name "*.log"`
	@${RM} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name "*.orig"`
	@${RM} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name "*.bak"`
	@${RM} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name ".git*"`
	@${RM} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name npm-shrinkwrap.json`
	@${STRIP_CMD} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name "*.o"`
	@${STRIP_CMD} `${FIND} ${STAGEDIR}${NODE_INSTALL_DIR} -name "*.node"`

.endif