mirror of https://github.com/lcpz/lain.git
146 lines
4.9 KiB
Lua
146 lines
4.9 KiB
Lua
|
|
--[[
|
|
|
|
Licensed under GNU General Public License v2
|
|
<<<<<<< HEAD
|
|
=======
|
|
* (c) 2015, worron
|
|
>>>>>>> upstream/master
|
|
* (c) 2013, Alexander Yakushev
|
|
|
|
--]]
|
|
|
|
-- Asynchronous io.popen for Awesome WM.
|
|
<<<<<<< HEAD
|
|
-- How to use...
|
|
-- ...asynchronously:
|
|
-- asyncshell.request('wscript -Kiev', function(f) wwidget.text = f:read("*l") end)
|
|
-- ...synchronously:
|
|
-- widget:set_text(asyncshell.demand('wscript -Kiev', 5):read("*l") or "Error")
|
|
|
|
local spawn = require('awful.util').spawn
|
|
|
|
asyncshell = {}
|
|
asyncshell.request_table = {}
|
|
asyncshell.id_counter = 0
|
|
asyncshell.folder = "/tmp/asyncshell"
|
|
asyncshell.file_template = asyncshell.folder .. '/req'
|
|
|
|
-- Create a directory for asynchell response files
|
|
os.execute("mkdir -p " .. asyncshell.folder)
|
|
|
|
-- Returns next tag - unique identifier of the request
|
|
local function next_id()
|
|
asyncshell.id_counter = (asyncshell.id_counter + 1) % 100000
|
|
return asyncshell.id_counter
|
|
end
|
|
|
|
-- Sends an asynchronous request for an output of the shell command.
|
|
-- @param command Command to be executed and taken output from
|
|
-- @param callback Function to be called when the command finishes
|
|
-- @return Request ID
|
|
function asyncshell.request(command, callback)
|
|
local id = next_id()
|
|
local tmpfname = asyncshell.file_template .. id
|
|
asyncshell.request_table[id] = { callback = callback }
|
|
local req =
|
|
string.format("sh -c '%s > %s; " ..
|
|
'echo "asyncshell.deliver(%s)" | ' ..
|
|
"awesome-client' 2> /dev/null",
|
|
string.gsub(command, "'", "'\\''"), tmpfname, id)
|
|
spawn(req, false)
|
|
return id
|
|
end
|
|
|
|
-- Calls the remembered callback function on the output of the shell
|
|
-- command.
|
|
-- @param id Request ID
|
|
-- @param output The output file of the shell command to be delievered
|
|
function asyncshell.deliver(id)
|
|
if asyncshell.request_table[id] and
|
|
asyncshell.request_table[id].callback then
|
|
local output = io.open(asyncshell.file_template .. id, 'r')
|
|
asyncshell.request_table[id].callback(output)
|
|
end
|
|
end
|
|
|
|
-- Sends a synchronous request for an output of the command. Waits for
|
|
-- the output, but if the given timeout expires returns nil.
|
|
-- @param command Command to be executed and taken output from
|
|
-- @param timeout Maximum amount of time to wait for the result
|
|
-- @return File handler on success, nil otherwise
|
|
function asyncshell.demand(command, timeout)
|
|
local id = next_id()
|
|
local tmpfname = asyncshell.file_template .. id
|
|
local f = io.popen(string.format("(%s > %s; echo asyncshell_done) & " ..
|
|
"(sleep %s; echo asynchell_timeout)",
|
|
command, tmpfname, timeout))
|
|
local result = f:read("*line")
|
|
if result == "asyncshell_done" then
|
|
return io.open(tmpfname)
|
|
end
|
|
=======
|
|
-- How to use:
|
|
-- asyncshell.request('wscript -Kiev', function(output) wwidget.text = output end)
|
|
|
|
-- Grab environment
|
|
local awful = require('awful')
|
|
|
|
-- Initialize tables for module
|
|
asyncshell = { request_table = {}, id_counter = 0 }
|
|
|
|
-- Request counter
|
|
local function next_id()
|
|
asyncshell.id_counter = (asyncshell.id_counter + 1) % 10000
|
|
return asyncshell.id_counter
|
|
end
|
|
|
|
-- Remove given request
|
|
function asyncshell.clear(id)
|
|
if asyncshell.request_table[id] then
|
|
if asyncshell.request_table[id].timer then
|
|
asyncshell.request_table[id].timer:stop()
|
|
asyncshell.request_table[id].timer = nil
|
|
end
|
|
asyncshell.request_table[id] = nil
|
|
end
|
|
end
|
|
|
|
-- Sends an asynchronous request for an output of the shell command
|
|
-- @param command Command to be executed and taken output from
|
|
-- @param callback Function to be called when the command finishes
|
|
-- @param timeout Maximum amount of time to wait for the result (optional)
|
|
function asyncshell.request(command, callback, timeout)
|
|
local id = next_id()
|
|
asyncshell.request_table[id] = { callback = callback }
|
|
|
|
local formatted_command = string.gsub(command, '"','\"')
|
|
|
|
local req = string.format(
|
|
"echo \"asyncshell.deliver(%s, [[\\\"$(%s)\\\"]])\" | awesome-client &",
|
|
id, formatted_command
|
|
)
|
|
|
|
awful.util.spawn_with_shell(req)
|
|
|
|
if timeout then
|
|
asyncshell.request_table[id].timer = timer({ timeout = timeout })
|
|
asyncshell.request_table[id].timer:connect_signal("timeout", function() asyncshell.clear(id) end)
|
|
asyncshell.request_table[id].timer:start()
|
|
end
|
|
end
|
|
|
|
-- Calls the remembered callback function on the output of the shell command
|
|
-- @param id Request ID
|
|
-- @param output Shell command output to be delievered
|
|
function asyncshell.deliver(id, output)
|
|
local output = string.sub(output, 2, -2)
|
|
if asyncshell.request_table[id] then
|
|
asyncshell.request_table[id].callback(output)
|
|
asyncshell.clear(id)
|
|
end
|
|
>>>>>>> upstream/master
|
|
end
|
|
|
|
return asyncshell
|