[bug#39329] [PATCH v3 1/2] Add system start-up files for guix-daemon.

[Danny Milosavljevic <dannym@scratchpost.org>]

* etc/init.d/guix-daemon.in: New file.
* nix/local.mk (etc/init.d/guix-daemon): New rule.
(nodist_sysvinitservice_DATA): Add etc/init.d/guix-daemon.in .
(CLEANFILES): Add etc/init.d/guix-daemon .
* .gitignore: Add etc/init.d/guix-daemon .
---
 .gitignore                |  1 +
 etc/init.d/guix-daemon.in | 80 +++++++++++++++++++++++++++++++++++++++
 nix/local.mk              | 16 +++++++-
 3 files changed, 95 insertions(+), 2 deletions(-)
 create mode 100644 etc/init.d/guix-daemon.in

diff --git a/.gitignore b/.gitignore
index df59a9176e..de058dda5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -71,6 +71,7 @@
 /etc/guix-daemon.service
 /etc/guix-publish.conf
 /etc/guix-publish.service
+/etc/init.d/guix-daemon
 /guix-daemon
 /guix/config.scm
 /libformat.a
diff --git a/etc/init.d/guix-daemon.in b/etc/init.d/guix-daemon.in
new file mode 100644
index 0000000000..b9c99204df
--- /dev/null
+++ b/etc/init.d/guix-daemon.in
@@ -0,0 +1,80 @@
+#!/bin/bash
+### BEGIN INIT INFO
+# Provides:          guix-daemon
+# Required-Start:    $remote_fs $syslog
+# Required-Stop:     $remote_fs $syslog
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Guix build daemon
+# Description:       Provides a daemon that does builds for Guix
+### END INIT INFO
+
+set -e
+mkdir -p "/var/run"
+if [ ! -f "@localstatedir@/guix/profiles/per-user/root/current-guix/bin/guix-daemon" ]
+then
+  exit 5
+fi
+
+case "$1" in
+start)
+  if [ -f "/var/run/guix-daemon.pid" ]
+  then
+    if pgrep -F "/var/run/guix-daemon.pid" guix-daemon
+    then
+      exit 0
+    else
+      echo "guix-daemon has a stale pid file" >&2
+      exit 1
+    fi
+  else
+    daemonize \
+      -a \
+      -e "/var/log/guix-daemon-stderr.log" \
+      -o "/var/log/guix-daemon-stdout.log" \
+      -E GUIX_LOCPATH=@localstatedir@/guix/profiles/per-user/root/guix-profile/lib/locale \
+      -E LC_ALL=en_US.utf8 \
+      -p "/var/run/guix-daemon.pid" \
+      @localstatedir@/guix/profiles/per-user/root/current-guix/bin/guix-daemon \
+      --build-users-group=guixbuild
+  fi
+  ;;
+stop)
+  if [ -f "/var/run/guix-daemon.pid" ]
+  then
+    pkill -F "/var/run/guix-daemon.pid" guix-daemon || {
+      exit 1
+    }
+    sleep 10
+    pkill --signal 9 -F "/var/run/guix-daemon.pid" guix-daemon || true
+    exit 0
+  else
+    exit 0
+  fi
+  ;;
+status)
+  if [ -f "/var/run/guix-daemon.pid" ]
+  then
+    if pgrep -F "/var/run/guix-daemon.pid" guix-daemon
+    then
+      echo "guix-daemon is running"
+      exit 0
+    else
+      echo "guix-daemon has a stale pid file"
+      exit 1
+    fi
+  else
+    echo "guix-daemon is not running"
+    exit 3
+  fi
+  ;;
+restart)
+force-reload)
+  "$0" stop
+  "$0" start
+  ;;
+*)
+  echo "Usage: $0 (start|stop|status|restart|force-reload)"
+  exit 3
+  ;;
+esac
diff --git a/nix/local.mk b/nix/local.mk
index dc5a8398b2..a64bdd2137 100644
--- a/nix/local.mk
+++ b/nix/local.mk
@@ -164,6 +164,16 @@ etc/guix-%.service: etc/guix-%.service.in	\
 	       "$<" > "$@.tmp";		\
 	mv "$@.tmp" "$@"
 
+sysvinitservicedir = $(sysconfdir)/init.d
+nodist_sysvinitservice_DATA = etc/init.d/guix-daemon
+
+etc/init.d/guix-daemon: etc/init.d/guix-daemon.in	\
+			 $(top_builddir)/config.status
+	$(AM_V_GEN)$(MKDIR_P) "`dirname $@`";	\
+	$(SED) -e 's|@''localstatedir''@|$(localstatedir)|' <	\
+	       "$<" > "$@.tmp";		\
+	mv "$@.tmp" "$@"
+
 # The '.conf' jobs for Upstart.
 upstartjobdir = $(libdir)/upstart/system
 nodist_upstartjob_DATA = etc/guix-daemon.conf etc/guix-publish.conf
@@ -177,7 +187,8 @@ etc/guix-%.conf: etc/guix-%.conf.in	\
 
 CLEANFILES +=					\
   $(nodist_systemdservice_DATA)			\
-  $(nodist_upstartjob_DATA)
+  $(nodist_upstartjob_DATA)			\
+  $(nodist_sysvinitservice_DATA)
 
 EXTRA_DIST +=					\
   %D%/AUTHORS					\
@@ -185,7 +196,8 @@ EXTRA_DIST +=					\
   etc/guix-daemon.service.in			\
   etc/guix-daemon.conf.in			\
   etc/guix-publish.service.in			\
-  etc/guix-publish.conf.in
+  etc/guix-publish.conf.in			\
+  etc/init.d/guix-daemon.in
 
 if CAN_RUN_TESTS