From 278342d64d4aecdf1de8cf3d92f9dc044af572eb Mon Sep 17 00:00:00 2001
From: Jan Luebbe <jluebbe@debian.org>
Date: Wed, 24 Jun 2015 14:12:30 +0200
Subject: [PATCH] sysmocom-configure: add simple framework to run configuration
 scripts

The configuration scripts are named for the systemd units for which they
generate configuration files. The generator causes them to run before
those units are started.

If /slot/system.conf is missing, we just exit the generator.
---
 recipes-apps/tasks/task-sysmocom-tools.bb     |  1 +
 .../files/multi-user.target.sh                | 12 +++++++
 .../files/osmo-bsc.service.sh                 | 12 +++++++
 .../files/sysmocom-bsc/multi-user.target.sh   | 11 +++++++
 .../files/sysmocom-generator                  | 32 +++++++++++++++++++
 .../sysmocom-configure_1.0.bb                 | 19 +++++++++++
 6 files changed, 87 insertions(+)
 create mode 100644 recipes-config/sysmocom-configure/files/multi-user.target.sh
 create mode 100644 recipes-config/sysmocom-configure/files/osmo-bsc.service.sh
 create mode 100644 recipes-config/sysmocom-configure/files/sysmocom-bsc/multi-user.target.sh
 create mode 100755 recipes-config/sysmocom-configure/files/sysmocom-generator
 create mode 100644 recipes-config/sysmocom-configure/sysmocom-configure_1.0.bb

diff --git a/recipes-apps/tasks/task-sysmocom-tools.bb b/recipes-apps/tasks/task-sysmocom-tools.bb
index 96e6307..1bc7559 100644
--- a/recipes-apps/tasks/task-sysmocom-tools.bb
+++ b/recipes-apps/tasks/task-sysmocom-tools.bb
@@ -17,4 +17,5 @@ RDEPENDS_${PN} = "\
     sysmocom-backup \
     sysmocom-backup-default \
     sysmocom-systemd \
+    sysmocom-configure \
     "
diff --git a/recipes-config/sysmocom-configure/files/multi-user.target.sh b/recipes-config/sysmocom-configure/files/multi-user.target.sh
new file mode 100644
index 0000000..3a10995
--- /dev/null
+++ b/recipes-config/sysmocom-configure/files/multi-user.target.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -eu
+
+TEST_VALUE="default"
+
+. /slot/system.conf
+
+cat >/etc/symocom/test.cfg <<EOF
+[main]
+bla=$TEST_VALUE
+EOF
diff --git a/recipes-config/sysmocom-configure/files/osmo-bsc.service.sh b/recipes-config/sysmocom-configure/files/osmo-bsc.service.sh
new file mode 100644
index 0000000..7201c58
--- /dev/null
+++ b/recipes-config/sysmocom-configure/files/osmo-bsc.service.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -eu
+
+OSMOBSC_VALUE="bar"
+
+. /slot/system.conf
+
+cat >/etc/osmocom/osmo-bsc.cfg <<EOF
+#dummy: OSMOBSC_VALUE=$OSMOBSC_VALUE
+EOF
+
diff --git a/recipes-config/sysmocom-configure/files/sysmocom-bsc/multi-user.target.sh b/recipes-config/sysmocom-configure/files/sysmocom-bsc/multi-user.target.sh
new file mode 100644
index 0000000..7e76b35
--- /dev/null
+++ b/recipes-config/sysmocom-configure/files/sysmocom-bsc/multi-user.target.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+TEST_VALUE="default"
+
+. /slot/system.conf
+
+cat >/etc/sysmocom/test.cfg <<EOF
+[main]
+bla=$TEST_VALUE
+model=sysmocom-bsc
+EOF
diff --git a/recipes-config/sysmocom-configure/files/sysmocom-generator b/recipes-config/sysmocom-configure/files/sysmocom-generator
new file mode 100755
index 0000000..b8f43e8
--- /dev/null
+++ b/recipes-config/sysmocom-configure/files/sysmocom-generator
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+if [ ! -e /slot/system.conf ]; then
+	exit 0
+fi
+
+. /slot/system.conf
+
+for HANDLER in $(ls /etc/sysmocom/configure.d/*.sh); do
+	UNIT=$(basename "$HANDLER" .sh)
+	cat >$1/${UNIT//./-}-configure.service <<EOF
+[Unit]
+Description=Generate $UNIT Configuration
+After=sysmocom-restore.service
+Before=$UNIT
+
+[Service]
+Type=oneshot
+RemainAfterExit=true
+ExecStart=$HANDLER
+EOF
+	mkdir -p $1/$UNIT.wants
+	ln -s /lib/systemd/system/${UNIT//./-}-configure.service $1/$UNIT.wants/
+done
+
+if [ -n "$OSMOBSC_ENABLED" ]; then
+	ln -s /lib/systemd/system/osmo-bsc.service $1/multi-user.target.wants/
+fi
+
+if [ -n "$OSMONITB_ENABLED" ]; then
+	ln -s /lib/systemd/system/osmo-nitb.service $1/multi-user.target.wants/
+fi
diff --git a/recipes-config/sysmocom-configure/sysmocom-configure_1.0.bb b/recipes-config/sysmocom-configure/sysmocom-configure_1.0.bb
new file mode 100644
index 0000000..f3fca7a
--- /dev/null
+++ b/recipes-config/sysmocom-configure/sysmocom-configure_1.0.bb
@@ -0,0 +1,19 @@
+DESCRIPTION = "sysmocom configuration scripts"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+
+SRC_URI = " \
+	file://sysmocom-generator \
+	file://multi-user.target.sh \
+	file://osmo-bsc.service.sh \
+"
+
+do_install() {
+	install -d ${D}${systemd_unitdir}/system-generators
+	install -m 0755 ${WORKDIR}/sysmocom-generator ${D}${systemd_unitdir}/system-generators/
+
+	install -d ${D}${sysconfdir}/sysmocom/configure.d
+	install -m 0755 ${WORKDIR}/*.sh ${D}${sysconfdir}/sysmocom/configure.d/
+}
+
+FILES_${PN} += "${systemd_unitdir}/system-generators"