# 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 npm_files="${NPM_FILES} ${NPM_EXTRA_FILES}"
	local node_modules="${D}/usr/$(get_libdir)/node_modules/${NPM_MODULE}"

	mkdir -p ${node_modules} || die "Could not create DEST folder"

	for f in ${npm_files}
	do
        if [[ -e "${S}/$f" ]]; then
            cp -r "${S}/$f" ${node_modules}
        fi
    done
	
	if use doc; then
		local npm_docs="${NPM_DOCS} ${NPM_EXTRA_DOCS}"

		for f in $npm_docs
		do
			if [[ -e "${S}/$f" ]]; then
				dodoc -r "${S}/$f"
			fi
		done
	fi
}

EXPORT_FUNCTIONS src_unpack src_compile src_install