add awesome wm config

1 files changed, 74 insertions, 0 deletions

diff --git a/.config/awesome/runonce.lua b/.config/awesome/runonce.lua
new file mode 100644
index 0000000..fd57cde
--- /dev/null
+++ b/.config/awesome/runonce.lua
@@ -0,0 +1,74 @@
+-- @author Peter J. Kranz (Absurd-Mind, peter@myref.net)
+-- Any questions, criticism or praise just drop me an email
+
+local M = {}
+
+-- get the current Pid of awesome
+local function getCurrentPid()
+    -- get awesome pid from pgrep
+    local fpid = io.popen("pgrep -u " .. os.getenv("USER") .. " -o awesome")
+    local pid = fpid:read("*n")
+    fpid:close()
+
+    -- sanity check
+    if pid == nil then
+        return -1
+    end
+
+    return pid
+end
+
+local function getOldPid(filename)
+    -- open file
+    local pidFile = io.open(filename)
+    if pidFile == nil then
+        return -1
+    end
+
+    -- read number
+    local pid = pidFile:read("*n")
+    pidFile:close()
+
+    -- sanity check
+    if pid <= 0 then
+        return -1
+    end
+
+    return pid;
+end
+
+local function writePid(filename, pid)
+    local pidFile = io.open(filename, "w+")
+    pidFile:write(pid)
+    pidFile:close()
+end
+
+local function shallExecute(oldPid, newPid)
+    -- simple check if equivalent
+    if oldPid == newPid then
+        return false
+    end
+
+    return true
+end
+
+local function getPidFile()
+    local host = io.lines("/proc/sys/kernel/hostname")()
+    return awful.util.getdir("cache") .. "/awesome." .. host .. ".pid"
+end
+
+-- run Once per real awesome start (config reload works)
+-- does not cover "pkill awesome && awesome"
+function M.run(shellCommand)
+    -- check and Execute
+    if shallExecute(M.oldPid, M.currentPid) then
+        awful.util.spawn_with_shell(shellCommand)
+    end
+end
+
+M.pidFile = getPidFile()
+M.oldPid = getOldPid(M.pidFile)
+M.currentPid = getCurrentPid()
+writePid(M.pidFile, M.currentPid)
+
+return M