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

[Morgan.J.Smith@outlook.com]

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

* etc/guix-install.sh: Add support for openrc

I also removed the --warning=no-timestamp tar flag and changed grep to use
extended regex instead of perl regex since these flags where not supported on
the alpine linux image I was using to test (3.12.0-x86_64).
---
 etc/guix-install.sh    | 18 +++++++++++++++---
 etc/openrc/guix-daemon | 11 +++++++++++
 2 files changed, 26 insertions(+), 3 deletions(-)
 create mode 100644 etc/openrc/guix-daemon

diff --git a/etc/guix-install.sh b/etc/guix-install.sh
index 72dc3839e8..9e9f8470d8 100755
--- a/etc/guix-install.sh
+++ b/etc/guix-install.sh
@@ -150,6 +150,9 @@ 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 "${INF}init system is: OpenRC"
+        INIT_SYS="openrc"
     else
         INIT_SYS="NA"
         _err "${ERR}Init system could not be detected."
@@ -212,7 +215,7 @@ guix_get_bin_list()
         | sort -Vu)")
 
     latest_ver="$(echo "$bin_ver_ls" \
-                       | grep -oP "([0-9]{1,2}\.){2}[0-9]{1,2}" \
+                       | grep -oE "([[:digit:]]{1,2}\.){2}[[:digit:]]{1,2}" \
                        | tail -n1)"
 
     default_ver="guix-binary-${latest_ver}.${ARCH_OS}"
@@ -268,8 +271,7 @@ sys_create_store()
     _debug "--- [ $FUNCNAME ] ---"
 
     cd "$tmp_path"
-    tar --warning=no-timestamp \
-        --extract \
+    tar --extract \
         --file "$pkg" &&
     _msg "${PAS}unpacked archive"
 
@@ -384,6 +386,16 @@ 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/etc/openrc/guix-daemon b/etc/openrc/guix-daemon
new file mode 100644
index 0000000000..436673f169
--- /dev/null
+++ b/etc/openrc/guix-daemon
@@ -0,0 +1,11 @@
+#!/sbin/openrc-run
+
+export GUIX_LOCPATH=/var/guix/profiles/per-user/root/guix-profile/lib/locale
+export LC_ALL=en_US.utf8
+command="/var/guix/profiles/per-user/root/current-guix/bin/guix-daemon"
+command_args="--build-users-group=guixbuild"
+command_background="yes"
+pidfile="/var/run/guix-daemon.pid"
+
+output_log="/var/log/guix-daemon-stdout.log"
+error_log="/var/log/guix-daemon-stderr.log"
-- 
2.27.0