X-Git-Url: https://git.madduck.net/etc/awesome.git/blobdiff_plain/912bd26ede8901c98fd8d7a35f8493ee448109ad..14d047eaa75fb760508e2e4aeb51b42f5fed31ed:/helpers.lua?ds=sidebyside

diff --git a/helpers.lua b/helpers.lua
index 503c40e..6c0c3c4 100644
--- a/helpers.lua
+++ b/helpers.lua
@@ -8,11 +8,13 @@
 
 local debug  = require("debug")
 
-local capi   = { timer = timer }
+local assert = assert
+local capi   = { timer = (type(timer) == 'table' and timer or require ("gears.timer")) }
 local io     = { open  = io.open,
                  lines = io.lines,
                  popen = io.popen }
 local rawget = rawget
+local table  = { sort   = table.sort }
 
 -- Lain helper functions for internal use
 -- lain.helpers
@@ -48,13 +50,25 @@ end
 -- list/table if the file does not exist
 function helpers.lines_from(file)
   if not helpers.file_exists(file) then return {} end
-  lines = {}
+  local lines = {}
   for line in io.lines(file) do
     lines[#lines + 1] = line
   end
   return lines
 end
 
+-- match all lines from a file, returns an empty
+-- list/table if the file or match does not exist
+function helpers.lines_match(regexp, file)
+	local lines = {}
+	for index,line in pairs(helpers.lines_from(file)) do
+		if string.match(line, regexp) then
+			lines[index] = line
+		end
+	end
+	return lines
+end
+
 -- get first line of a file, return nil if
 -- the file does not exist
 function helpers.first_line(file)
@@ -78,14 +92,11 @@ helpers.timer_table = {}
 
 function helpers.newtimer(_name, timeout, fun, nostart)
     local name = timeout
-
     if not helpers.timer_table[name] then
         helpers.timer_table[name] = capi.timer({ timeout = timeout })
         helpers.timer_table[name]:start()
     end
-
     helpers.timer_table[name]:connect_signal("timeout", fun)
-
     if not nostart then
         helpers.timer_table[name]:emit_signal("timeout")
     end
@@ -95,7 +106,7 @@ end
 
 -- {{{ Pipe operations
 
--- read the full output of a pipe (command)
+-- read the full output of a command output
 function helpers.read_pipe(cmd)
    local f = assert(io.popen(cmd))
    local output = f:read("*all")
@@ -103,6 +114,16 @@ function helpers.read_pipe(cmd)
    return output
 end
 
+-- return line iterator of a command output
+function helpers.pipelines(...)
+    local f = assert(io.popen(...))
+    return function () -- iterator
+        local data = f:read()
+        if data == nil then f:close() end
+        return data
+    end
+end
+
 -- }}}
 
 -- {{{ A map utility
@@ -119,4 +140,24 @@ end
 
 -- }}}
 
+--{{{ Iterate over table of records sorted by keys
+function helpers.spairs(t)
+    -- collect the keys
+    local keys = {}
+    for k in pairs(t) do keys[#keys+1] = k end
+
+    table.sort(keys)
+
+    -- return the iterator function
+    local i = 0
+    return function()
+        i = i + 1
+        if keys[i] then
+            return keys[i], t[keys[i]]
+        end
+    end
+end
+--}}}
+
+
 return helpers