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+# Copyright 1999-2013 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+# @ECLASS: npm.eclass
+# @MAINTAINER:
+# Jesus Rivero <neurogeek@gentoo.org>
+# @BLURB: Eclass for NodeJS packages available through the npm registry.
+# @DESCRIPTION:
+# This eclass contains various functions that may be useful when
+# dealing with packages from the npm registry, for NodeJS.
+# Requires EAPI=2 or later.
+
+case ${EAPI} in
+	2|3|4|5) : ;;
+	*)	 die "npm.eclass: unsupported EAPI=${EAPI:-0}" ;;
+esac
+
+inherit multilib
+
+# @ECLASS-VARIABLE: NPM_MODULE
+# @DESCRIPTION:
+# Name of the resulting NodeJS/npm module. 
+# The Default value for NPM_MODULE is ${PN}
+#
+# Example: NPM_MODULE="${MY_PN}"
+NPM_MODULE="${PN}"
+
+# @ECLASS-VARIABLE: NPM_FILES
+# @INTERNAL
+# @DESCRIPTION:
+# Files and directories that usually come in a standard
+# NodeJS/npm module.
+NPM_FILES="lib package.json index.js"
+
+# @ECLASS-VARIABLE: NPM_DOCS
+# @INTERNAL
+# @DESCRIPTION:
+# Document files that usually come in a standard
+# NodeJS/npm module.
+NPM_DOCS="README* LICENSE HISTORY*"
+
+# @ECLASS-VARIABLE: NPM_EXTRA_FILES
+# @DESCRIPTION:
+# If additional dist files are present in the NodeJS/npm module
+# that are not listed in NPM_FILES, then this is the place to put them in.
+# Can be either files, or directories.
+# Example: NPM_EXTRA_FILES="rigger.js modules"
+
+# @ECLASS-VARIABLE: NPM_EXTRA_DOCS
+# @DESCRIPTION:
+# Variable for additional document files that are not listed
+# in NPM_DOCS
+# Example: NPM_EXTRA_DOCS="docs index.html"
+
+HOMEPAGE="https://www.npmjs.org/package/${PN}"
+SRC_URI="http://registry.npmjs.org/${PN}/-/${P}.tgz"
+
+# @FUNCTION: npm-src_unpack
+# @DESCRIPTION:
+# Default src_unpack function for NodeJS/npm packages. This funtions
+# unpacks the source code, then renames the 'package' dir to $S
+
+npm_src_unpack() {
+	unpack "${A}"
+	mv "${WORKDIR}/package" ${S}
+}
+
+# @FUNCTION: npm-src_compile
+# @DESCRIPTION:
+# This function does nothing.
+
+npm_src_compile() {
+	true
+}
+
+# @FUNCTION: npm-src_install
+# @DESCRIPTION:
+# This function installs the NodeJS/npm module to an appropriate location,
+# also taking care of NPM_FILES, NPM_EXTRA_FILES, NPM_DOCS and NPM_EXTRA_DOCS
+
+npm_src_install() {
+	local node_modules="${D}/usr/$(get_libdir)/node_modules/${NPM_MODULE}"
+	mkdir -p ${node_modules} || die "Could not create DEST folder"
+
+    # These are basically the 'standard' files in an npm package
+	# We'll handle additional files in NPM_EXTRA_FILES
+	for f in "${NPM_FILES} ${NPM_EXTRA_FILES}"
+	do
+        if [[ -e "${S}/$f" ]]; then
+            cp -r "${S}/$f" ${node_modules}
+        fi
+    done
+	
+	for f in "${NPM_DOCS} ${NPM_EXTRA_DOCS}"
+	do
+		if [[ -e "${S}/$f" ]]; then
+			dodoc -r "${S}/$f"
+		fi
+	done
+}
+
+EXPORT_FUNCTIONS src_unpack src_compile src_install