[bug#42816] [PATCH 2/2] guix-install.sh: Add openrc support

[Morgan.J.Smith@outlook.com]

From: Morgan Smith <Morgan.J.Smith@outlook.com>

Tested and working on Alpine Linux 3.12.0-x86_64

* etc/guix-install.sh: Add openrc support
* etc/openrc/guix-daemon.in: New file - openrc service file
* nix/local.mk (etc/openrc/guix-daemon): New rule.
(nodist_openrcservice_DATA): Add etc/openrc/guix-daemon.in .
(CLEANFILES): Add etc/openrc/guix-daemon .
* .gitignore: Add etc/openrc/guix-daemon .
---

I'm pretty far out of comfort zone on these changes so please let me
know how this works. I basically guessed what needed to be changed in
local.mk.

---
 .gitignore          |  1 +
 etc/guix-install.sh | 15 +++++++++++++++
 nix/local.mk        | 17 +++++++++++++++--
 3 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index f630444a0f..e2f745b42a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -74,6 +74,7 @@
 /etc/guix-publish.conf
 /etc/guix-publish.service
 /etc/init.d/guix-daemon
+/etc/openrc/guix-daemon
 /guix-daemon
 /guix/config.scm
 /libformat.a
diff --git a/etc/guix-install.sh b/etc/guix-install.sh
index 06edbaaffd..ff4b95f124 100755
--- a/etc/guix-install.sh
+++ b/etc/guix-install.sh
@@ -4,6 +4,7 @@
 # Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
 # Copyright © 2018 Efraim Flashner <efraim@flashner.co.il>
 # Copyright © 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
+# Copyright © 2020 Morgan Smith <Morgan.J.Smith@outlook.com>
 #
 # This file is part of GNU Guix.
 #
@@ -150,6 +151,10 @@ chk_init_sys()
         _msg "${INF}init system is: sysv-init"
         INIT_SYS="sysv-init"
         return 0
+    elif [[ $(openrc --version 2>/dev/null) =~ \(OpenRC\) ]]; then
+        _msg "${INF}init system is: OpenRC"
+        INIT_SYS="openrc"
+        return 0
     else
         INIT_SYS="NA"
         _err "${ERR}Init system could not be detected."
@@ -383,6 +388,16 @@ sys_enable_guix_daemon()
                   service guix-daemon start; } &&
                 _msg "${PAS}enabled Guix daemon via sysv"
             ;;
+        openrc)
+            { mkdir -p /etc/init.d;
+              cp "${ROOT_HOME}/.config/guix/current/etc/openrc/guix-daemon" \
+                 /etc/init.d/guix-daemon;
+              chmod 775 /etc/init.d/guix-daemon;
+
+              rc-update add guix-daemon default &&
+                  rc-service guix-daemon start; } &&
+                _msg "${PAS}enabled Guix daemon via OpenRC"
+            ;;
         NA|*)
             _msg "${ERR}unsupported init system; run the daemon manually:"
             echo "  ${ROOT_HOME}/.config/guix/current/bin/guix-daemon --build-users-group=guixbuild"
diff --git a/nix/local.mk b/nix/local.mk
index 005cde5563..2bb01041b9 100644
--- a/nix/local.mk
+++ b/nix/local.mk
@@ -180,6 +180,17 @@ etc/init.d/guix-daemon: etc/init.d/guix-daemon.in	\
 	       "$<" > "$@.tmp";		\
 	mv "$@.tmp" "$@"
 
+# The service script for openrc.
+openrcservicedir = $(sysconfdir)/init.d
+nodist_openrcservice_DATA = etc/openrc/guix-daemon
+
+etc/openrc/guix-daemon: etc/openrc/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
@@ -194,7 +205,8 @@ etc/guix-%.conf: etc/guix-%.conf.in	\
 CLEANFILES +=					\
   $(nodist_systemdservice_DATA)			\
   $(nodist_upstartjob_DATA)			\
-  $(nodist_sysvinitservice_DATA)
+  $(nodist_sysvinitservice_DATA)		\
+  $(nodist_openrcservice_DATA)
 
 EXTRA_DIST +=					\
   %D%/AUTHORS					\
@@ -203,7 +215,8 @@ EXTRA_DIST +=					\
   etc/guix-daemon.conf.in			\
   etc/guix-publish.service.in			\
   etc/guix-publish.conf.in			\
-  etc/init.d/guix-daemon.in
+  etc/init.d/guix-daemon.in			\
+  etc/openrc/guix-daemon.in
 
 if CAN_RUN_TESTS
 
-- 
2.28.0