From c462174bc4f32a90a9ed2ae656f8d428bfc4405c Mon Sep 17 00:00:00 2001
From: Greg Beard <gmbeard@googlemail.com>
Date: Sun, 29 Sep 2024 15:38:46 +0100
Subject: [PATCH] feat: Adds runit service and systemd unit files

---
 CMakeLists.txt                    |  2 ++
 init/CMakeLists.txt               | 45 +++++++++++++++++++++++++++++++
 init/runit/run.in                 |  9 +++++++
 init/systemd/gpufanctl.service.in | 14 ++++++++++
 4 files changed, 70 insertions(+)
 create mode 100644 init/CMakeLists.txt
 create mode 100644 init/runit/run.in
 create mode 100644 init/systemd/gpufanctl.service.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1ae0efa..e83f3cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,4 +49,6 @@ if(GPUFANCTL_ENABLE_TESTS)
     add_subdirectory(tests)
 endif()
 
+add_subdirectory(init)
+
 install(TARGETS gpufanctl)
diff --git a/init/CMakeLists.txt b/init/CMakeLists.txt
new file mode 100644
index 0000000..7b1d2bd
--- /dev/null
+++ b/init/CMakeLists.txt
@@ -0,0 +1,45 @@
+configure_file(
+    runit/run.in
+    sv/gpufanctl/run
+    @ONLY
+)
+
+configure_file(
+    systemd/gpufanctl.service.in
+    systemd/user/gpufanctl.service
+    @ONLY
+)
+
+include(GNUInstallDirs)
+
+# Installs the runit service. Not installed by default. Requires...
+#
+# ```
+# $ cmake --install . --component gpufanctl-runit
+# ```
+install(
+    FILES "${CMAKE_CURRENT_BINARY_DIR}/sv/gpufanctl/run"
+    DESTINATION "${CMAKE_INSTALL_SYSCONFDIR}/sv/gpufanctl"
+    PERMISSIONS
+        OWNER_READ OWNER_WRITE OWNER_EXECUTE
+        GROUP_READ GROUP_EXECUTE
+        WORLD_READ WORLD_EXECUTE
+    COMPONENT gpufanctl-runit
+    EXCLUDE_FROM_ALL
+)
+
+# Installs the systemd unit file. Not installed by default. Requires...
+#
+# ```
+# $ cmake --install . --component gpufanctl-systemd
+# ```
+install(
+    FILES "${CMAKE_CURRENT_BINARY_DIR}/systemd/user/gpufanctl.service"
+    DESTINATION "lib/systemd/user/gpufanctl.service"
+    PERMISSIONS
+        OWNER_READ OWNER_WRITE
+        GROUP_READ
+        WORLD_READ
+    COMPONENT gpufanctl-systemd
+    EXCLUDE_FROM_ALL
+)
diff --git a/init/runit/run.in b/init/runit/run.in
new file mode 100644
index 0000000..2c761fa
--- /dev/null
+++ b/init/runit/run.in
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+exec 2>&1
+
+if [ -r ./conf ]; then
+    . ./conf
+fi
+
+exec @CMAKE_INSTALL_FULL_BINDIR@/gpufanctl ${OPTS} "${CURVE_DEFINITION}"
diff --git a/init/systemd/gpufanctl.service.in b/init/systemd/gpufanctl.service.in
new file mode 100644
index 0000000..f1088d6
--- /dev/null
+++ b/init/systemd/gpufanctl.service.in
@@ -0,0 +1,14 @@
+[Unit]
+Description=GPU fan control
+After=multi-user.target
+
+[Service]
+Type=simple
+ExecStart=@CMAKE_INSTALL_FULL_BINDIR@/gpufanctl
+Restart=always
+RestartSec=5s
+StandardOutput=journal
+StandardError=journal
+
+[Install]
+WantedBy=multi-user.target