ENH use external pacman update script now

drawing/Pacman.lua

@@ -5,13 +5,10 @@ local Line 			= require 'Line'
 local TextColumn	= require 'TextColumn'
 local Util			= require 'Util'
 
-local PACMAN_TABLE = {
-	'pacman -Qq',
-	'pacman -Qeq',
-	'pacman -Quq',
-	'pacman -Qdtq',
-	'pacman -Qmq'
-}
+local __string_match = string.match
+local __string_gmatch = string.gmatch
+
+local STATS_FILE = '/tmp/.conky_pacman'
 
 local _TEXT_SPACING_ = 20
 
@@ -44,9 +41,18 @@ local info = _G_Widget_.TextColumn{
 _TEXT_SPACING_ = nil
 
 local update = function(cr)
-	for i, cmd in pairs(PACMAN_TABLE) do
-		TextColumn.set(info, cr, i, Util.line_count(Util.execute_cmd(cmd)))
-	end
+   local stats = __string_match(Util.read_file(STATS_FILE), '%d+%s+(.*)$')
+   if stats then
+      local i = 1
+      for v in __string_gmatch(stats, '[^%s]+') do
+         TextColumn.set(info, cr, i, v)
+         i = i + 1
+      end
+   else
+      for i=1,5 do
+         TextColumn.set(info, cr, i, 'N/A')
+      end
+   end
 end
 
 local draw_static = function(cr)

scripts/pacman_stats

@@ -0,0 +1,25 @@
+#! /bin/bash
+
+stat_file=/tmp/.conky_pacman
+log_file=/var/log/pacman.log
+
+write_stats() {
+    now=$(date +%s)
+    tot=$(pacman -Qq | wc -l)
+    exp=$(pacman -Qeq | wc -l)
+    out=$(pacman -Quq | wc -l)
+    orp=$(pacman -Qdtq | wc -l)
+    loc=$(pacman -Qmq | wc -l)
+    echo "$now" "$tot" "$exp" "$out" "$orp" "$loc" > "$stat_file"
+}
+
+if [[ -f "$stat_file" ]]; then
+    last_pacman_update=$(stat -c %Y "$log_file")
+    last_stat_update=$(awk '{ print $1 }' "$stat_file")
+    if (( last_pacman_update > last_stat_update )); then
+        write_stats 
+    fi
+else
+    write_stats 
+fi
+