Include eclass for new nodejs ebuilds

New packages (zigbee2mqtt and node-red) from my gentoo overlay (https://github.com/inode64/inode64-overlay)

Signed-off-by: INODE64 <ffelix@inode64.com>

eclass/nodejs-pack.eclass

@@ -0,0 +1,81 @@
+# Copyright 2019-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: nodejs-pack.eclass
+# @MAINTAINER:
+# Fco. Javier Félix <web@inode64.com>
+# @AUTHOR:
+# Fco. Javier Félix <web@inode64.com>
+# @SUPPORTED_EAPIS: 7 8
+# @BLURB: An eclass for build NodeJS projects
+# @DESCRIPTION:
+# An eclass providing functions to build NodeJS packages
+#
+# Changelog:
+#   Initial version from:
+#       https://github.com/gentoo/gentoo/pull/930/files
+#       https://github.com/samuelbernardo/ssnb-overlay/blob/master/eclass/npm.eclass
+#       https://github.com/gentoo-mirror/lanodanOverlay/blob/master/eclass/nodejs.eclass
+#       https://github.com/Tatsh/tatsh-overlay/blob/master/eclass/yarn.eclass
+
+
+case ${EAPI} in
+7 | 8) ;;
+*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
+esac
+
+if [[ -z ${_NODEJS_PACK_ECLASS} ]]; then
+_NODEJS_PACK_ECLASS=1
+
+inherit nodejs
+
+if has nodejs-mod ${INHERITED}; then
+        eerror "nodejs-mod and nodejs-pack eclass are incompatible"
+fi
+
+RDEPEND+=" net-libs/nodejs"
+
+# Upstream does not support stripping go packages
+RESTRICT="test strip"
+
+EXPORT_FUNCTIONS src_compile src_install src_prepare
+
+# @FUNCTION: nodejs-pack_src_prepare
+# @DESCRIPTION:
+# Nodejs preparation phase
+nodejs-pack_src_prepare() {
+    debug-print-function "${FUNCNAME}" "${@}"
+
+    if ! nodejs_has_package && ! test -e package.json ; then
+        eerror "Unable to locate package.json"
+        eerror "Consider not inheriting the nodejs-pack eclass."
+        die "FATAL: Unable to find package.json"
+    fi
+
+    default_src_prepare
+}
+
+# @FUNCTION: nodejs-pack_src_compile
+# @DESCRIPTION:
+# General function for compiling a nodejs module
+nodejs-pack_src_compile() {
+    debug-print-function "${FUNCNAME}" "${@}"
+
+    einfo "Create pack file"
+    enpm --global pack || die "pack failed"
+}
+
+# @FUNCTION: nodejs-pack_src_install
+# @DESCRIPTION:
+# Function for installing the package
+nodejs-pack_src_install() {
+    debug-print-function "${FUNCNAME}" "${@}"
+
+    nodejs_docs
+
+    einfo "Install pack files"
+    enpm --prefix "${ED}"/usr --global \
+        install \
+        "$(nodejs_package)-$(nodejs_version).tgz" || die "install failed"
+}
+fi