services: pass service status to installer

This is long overdue: services feature influences live and rescue but doesn't do anything to the installed system as that's behind the installation barrier; some piggybacking required to do that has been merged into installer back in 2012 apparently (thanks to boyarsh@ for both doing that and bringing my attention to this fact; it's 65-setup-services.sh as of today). So the only thing missing has been the bridge to prepare those files -- still some more tweakery is required given the two-stage process arranged so that reusable configuration could include some sane defaults but the release manager is ultimately able to override anything without extra kludges; thank legion@ for his wonderful libshell either. NB: install2 script is a partial clone of rootfs one since processing the variables is identical; still rootfs script has to change service state directly while install2 one has to deposit the information for installer to handle.

services: pass service status to installer
f5fd7764 · Michael Shigorin · 67d60d00 · f5fd7764
Commit f5fd7764 authored Feb 08, 2014 by Michael Shigorin
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10-services features.in/services/install2/image-scripts.d/10-services +41 -0

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--- a/features.in/services/install2/image-scripts.d/10-services
+++ b/features.in/services/install2/image-scripts.d/10-services
+#!/bin/sh
+# this script piggybacks service status information
+# into the system to be installed (instead of applying
+# it to rootfs being formed immediately)
+# NB:install2 is not a rootfs, handling differs either
+STATUS=`mktemp`
+. shell-config
+switch() {
+	case "$2" in
+	on|off)
+		shell_config_set "$STATUS" "$1" "$2";;
+	esac
+}
+# defaults (most likely features.in ones)
+for i in $GLOBAL_DEFAULT_SERVICES_ENABLE;  do switch $i on;  done
+for i in $GLOBAL_DEFAULT_SERVICES_DISABLE; do switch $i off; done
+# explicitly specified behaviour (e.g. via conf.d)
+for i in $GLOBAL_SERVICES_ENABLE;  do switch $i on;  done
+for i in $GLOBAL_SERVICES_DISABLE; do switch $i off; done
+SERVICES="$GLOBAL_DEFAULT_SERVICES_ENABLE $GLOBAL_DEFAULT_SERVICES_DISABLE"
+SERVICES="$SERVICES $GLOBAL_SERVICES_ENABLE $GLOBAL_SERVICES_DISABLE"
+SERVICES="$(echo $SERVICES | sort -u)"
+# TODO: provide systemd-specific hooks too?
+for i in $SERVICES; do
+	onoff="$(shell_config_get "$STATUS" "$i")"
+	[ -n "$onoff" ] || continue
+	echo "$i" >> /usr/share/install2/services-"$onoff"
+done
+rm "$STATUS"
+: