--[[
Licensed under GNU General Public License v2
- * (c) 2013, Luke Bonham
+ * (c) 2013, Luke Bonham
--]]
local debug = require("debug")
-local capi = { timer = timer }
-local io = { open = io.open,
- lines = io.lines }
+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
return f ~= nil
end
--- get all lines from a file, returns an empty
+-- get all lines from a file, returns an empty
-- list/table if the file does not exist
function helpers.lines_from(file)
if not helpers.file_exists(file) then return {} end
lines = {}
- for line in io.lines(file) do
+ for line in io.lines(file) do
lines[#lines + 1] = line
end
return lines
-- returns nil otherwise
function helpers.first_nonempty_line(file)
for k,v in pairs(helpers.lines_from(file)) do
- if #v then return v end
+ if #v then return v end
end
return nil
end
-- }}}
+-- {{{ Pipe operations
+
+-- read the full output of a pipe (command)
+function helpers.read_pipe(cmd)
+ local f = assert(io.popen(cmd))
+ local output = f:read("*all")
+ f:close()
+ return output
+end
+
+-- }}}
+
-- {{{ A map utility
helpers.map_table = {}
-- }}}
+--{{{ 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