[gentoo-dev] [PATCH v2 2/3] Add nginx-module.eclass

[jonas.licht@fem.tu-ilmenau.de]

From: Jonas Licht <jonas.licht@fem.tu-ilmenau.de>

Signed-off-by: Jonas Licht <jonas.licht@fem.tu-ilmenau.de>
---
 eclass/nginx-module.eclass | 72 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 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..d9f9bbdb89c
--- /dev/null
+++ b/eclass/nginx-module.eclass
@@ -0,0 +1,72 @@
+# Copyright 2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: nginx-module.eclass
+# @MAINTAINER:
+# Jonas Licht <jonas.licht@gmail.com>
+# @AUTHOR:
+# Jonas Licht <jonas.licht@gmail.com>
+# @BLURB: Provide a set of functions to build nginx dynamic modules.
+# @DESCRIPTION:
+# Eclass to make dynamic nginx modules.
+# As these modules are hardly build against one nginx version we use version cut to indicate the nginx version too.
+# The first three parts of the version must represent the nginx version,
+# the remaining part displays the module version.
+#
+# To build a nginx module the whole nginx source code is needed,
+# therfore we set the SRC_URI to the nginx source archive.
+# The module archive must be added with SRC_URI+=
+
+case ${EAPI:-0} in
+	7) ;;
+	*) die "This eclass only supports EAPI 7" ;;
+esac
+
+# @ECLASS-VARIABLE: NGINX_PV
+# @DESCRIPTION:
+# Uses version cut of the first three parts of the version to determine the nginx version providing the module.
+# This version is used for SRC_URI, BDPEND and compiling process.
+NGINX_PV=$(ver_cut 1-3)
+
+# @ECLASS-VARIABLE: MODULE_PV
+# @DESCRIPTION:
+# Uses version cut to get the version of the module.
+# Variable can be used for SRC_URI of the nginx module.
+MODULE_PV=$(ver_cut 4-)
+
+BDPEND="=www-servers/nginx-${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 exicution 'nginx -V' and adds the package as dynamic module.
+nginx-module_src_configure() {
+	if [ $(grep -c "\.[[:space:]]auto/module" "${WORKDIR}/${PN}-${MODULE_PV}/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/ /")
+	./configure ${NGINX_ORIGIN_CONFIGURE} --add-dynamic-module="../${PN}-${MODULE_PV}" "$@" || 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() {
+	emake modules "$@"
+}
+
+# @FUNCTION: nginx-module_src_install
+# @DESCRIPTION:
+# Parses the module config file to get the so file name and install the shared object file to '/usr/$(get_libdir)/nginx/modules'
+nginx-module_src_install() {
+	NGINX_MODULE_NAME=$(grep ${WORKDIR}/${PN}-${MODULE_PV}/config -e "ngx_addon_name" | cut -d= -f2)
+	exeinto /usr/$(get_libdir)/nginx/modules
+	doexe ${S}/objs/${NGINX_MODULE_NAME}.so
+}
-- 
2.26.2