[gentoo-dev] [PATCH v3 2/3] Add nginx-module.eclass

[Adrian Schollmeyer]

From: Jonas Licht <jonas.licht@××××××××××××××.de>

Signed-off-by: Adrian Schollmeyer <nex+b-g-o@××××××.de>
Signed-off-by: Jonas Licht <jonas.licht@××××××××××××××.de>
---
 eclass/nginx-module.eclass | 90 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 eclass/nginx-module.eclass

diff --git a/eclass/nginx-module.eclass b/eclass/nginx-module.eclass
new file mode 100644
index 00000000000..aa25977cdc5
--- /dev/null
+++ b/eclass/nginx-module.eclass
@@ -0,0 +1,90 @@
+# Copyright 2021-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: nginx-module.eclass
+# @MAINTAINER:
+# Jonas Licht <jonas.licht@×××××.com>
+# @AUTHOR:
+# Jonas Licht <jonas.licht@×××××.com>
+# @BLURB: Provide a set of functions to build nginx dynamic modules.
+# @DESCRIPTION:
+# Eclass to make dynamic nginx modules.
+# As these modules are built against one particular nginx version.
+# The nginx version is encoded in PV as the first three version components,
+# while the rest of PV represent's the module's upstream version.
+#
+# To build an nginx module the whole nginx source code is needed.
+# Therefore SRC_URI is set to the nginx source archive.
+# Ebuilds using this eclass thus must use SRC_URI+= instead of
+# SRC_URI=.
+
+case ${EAPI:-0} in
+	7|8) ;;
+	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
+esac
+
+inherit toolchain-funcs
+
+# @ECLASS_VARIABLE: NGINX_PV
+# @PRE_INHERIT
+# @DESCRIPTION:
+# Version of www-apps/nginx to build against.
+# Default is the first three components of PV.
+: "${NGINX_PV:=$(ver_cut 1-3)}"
+
+# @ECLASS_VARIABLE: MODULE_PV
+# @PRE_INHERIT
+# @DESCRIPTION:
+# Module version minus the www-apps/nginx version.
+# Default is all components of PV starting with the 4th component.
+: "${MODULE_PV=$(ver_cut 4-)}"
+
+# @ECLASS_VARIABLE: MODULE_SOURCE
+# @DESCRIPTION:
+# Path to the unpacked source directory of the module.
+# Defaults to '${WORKDIR}/${PN}-${MODULE_PV}', mimicking the default value of S.
+: "${MODULE_SOURCE:="${WORKDIR}/${PN}-${MODULE_PV}"}"
+
+BDEPEND="~www-servers/nginx-${NGINX_PV}:="
+SRC_URI="https://nginx.org/download/nginx-${NGINX_PV}.tar.gz"
+
+S="${WORKDIR}/nginx-${NGINX_PV}"
+
+EXPORT_FUNCTIONS src_configure src_compile src_install
+
+# @FUNCTION: nginx-module_src_configure
+# @USAGE: [additional-args]
+# @DESCRIPTION:
+# Parses the configure from the original nginx binary by executing 'nginx -V' and
+# adds the package as dynamic module.
+nginx-module_src_configure() {
+	if [ "$(grep -c "\.[[:space:]]auto/module" "${MODULE_SOURCE}/config")" -eq 0 ]; then
+		die "module uses old unsupported static config file syntax: https://www.nginx.com/resources/wiki/extending/converting/"
+	fi
+	#grep nginx configure from nginx -V add drop all other external modules
+	NGINX_ORIGIN_CONFIGURE=$(nginx -V 2>&1 | grep "configure arguments:" | cut -d: -f2 | sed "s/--add-module=\([^\s]\)*\s/ /")
+	# shellcheck disable=SC2086
+	./configure ${NGINX_ORIGIN_CONFIGURE} --add-dynamic-module="${MODULE_SOURCE}" "$@" || die "configure failed"
+}
+
+# @FUNCTION: nginx-module_src_compile
+# @USAGE: [additional-args]
+# @DESCRIPTION:
+# Runs 'make modules' to only build our package module.
+nginx-module_src_compile() {
+	# https://bugs.gentoo.org/286772
+	export LANG=C LC_ALL=C
+	emake modules "$@" CC="$(tc-getCC)" LINK="$(tc-getCC) ${LDFLAGS}" OTHERLDFLAGS="${LDFLAGS}"
+}
+
+# @FUNCTION: nginx-module_src_install
+# @DESCRIPTION:
+# Parses the module config file to get the shared object file name and install the file to the nginx module directory.
+nginx-module_src_install() {
+	einstalldocs
+
+	local NGINX_MODULE_NAME
+	NGINX_MODULE_NAME=$(grep "${MODULE_SOURCE}/config" -e "ngx_addon_name" | cut -d= -f2)
+	exeinto /usr/$(get_libdir)/nginx/modules
+	doexe objs/${NGINX_MODULE_NAME}.so
+}
-- 
2.38.2