# 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}"
if [[ -z $NPM_MODULE ]]; then
	NPM_MODULE="${PN}"
fi

# @ECLASS-VARIABLE: NPM_FILES
# @INTERNAL
# @DESCRIPTION:
# Files and directories that usually come in a standard NodeJS/npm module.
NPM_FILES="index.js lib package.json ${NPM_MODULE}.js"

# @ECLASS-VARIABLE: NPM_DOCS
# @DESCRIPTION:
# Document files that come in a NodeJS/npm module, outside of the usual docs
# list of README*, ChangeLog AUTHORS* etc. These are only installed if 'doc' is
# in ${USE}
# 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"

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

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

	# Install docs usually found in NodeJS/NPM packages.
	local f
	for f in README* HISTORY* ChangeLog AUTHORS NEWS TODO CHANGES \
			THANKS BUGS FAQ CREDITS CHANGELOG*; do
		if [[ -s ${f} ]]; then
			dodoc "${f}"
		fi
	done
    
    if has doc ${USE}; then
        local npm_docs="${NPM_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