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Workaround premature end of file with awful.spawn.easy_async
[etc/awesome.git] / widget / fs.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013, Luke Bonham                     
6                                                   
7 --]]
8
9 local helpers      = require("lain.helpers")
10 local shell        = require("awful.util").shell
11 local focused      = require("awful.screen").focused
12 local wibox        = require("wibox")
13 local naughty      = require("naughty")
14 local string       = string
15 local tonumber     = tonumber
16 local setmetatable = setmetatable
17
18 -- File system disk space usage
19 -- lain.widget.fs
20 local fs = { unit  = { ["mb"] = 1024, ["gb"] = 1024^2 } }
21
22 function fs.hide()
23     if not fs.notification then return end
24     naughty.destroy(fs.notification)
25     fs.notification = nil
26 end
27
28 function fs.show(seconds, scr)
29     fs.update()
30
31     fs.hide()
32
33     if fs.followtag then
34         fs.notification_preset.screen = focused()
35     elseif scr then
36         fs.notification_preset.screen = scr or 1
37     end
38
39     fs.notification = naughty.notify({
40         preset      = fs.notification_preset,
41         timeout     = seconds or 5
42     })
43 end
44
45 local function factory(args)
46     local args             = args or {}
47     local timeout          = args.timeout or 600
48     local partition        = args.partition or "/"
49     local showpopup        = args.showpopup or "on"
50     local notify           = args.notify or "on"
51     local settings         = args.settings or function() end
52
53     fs.options             = args.options
54     fs.followtag           = args.followtag or false
55     fs.notification_preset = args.notification_preset
56
57     if not fs.notification_preset then
58         fs.notification_preset = {
59             font = "Monospace 10",
60             fg   = "#FFFFFF",
61             bg   = "#000000"
62         }
63     end
64
65     fs.widget = wibox.widget.textbox()
66
67     helpers.set_map(partition, false)
68
69     function fs.update()
70         fs_info, fs_now  = {}, {}
71         helpers.async({ shell, "-c", "/usr/bin/env LC_ALL=C df -k --output=target,size,used,avail,pcent" }, function(f)
72             for line in string.gmatch(f, "\n[^\n]+") do
73                 local m,s,u,a,p = string.match(line, "(/.-%s).-(%d+).-(%d+).-(%d+).-([%d]+)%%")
74                 m = m:gsub(" ", "") -- clean target from any whitespace
75
76                 fs_info[m .. " size_mb"]  = string.format("%.1f", tonumber(s) / fs.unit["mb"])
77                 fs_info[m .. " size_gb"]  = string.format("%.1f", tonumber(s) / fs.unit["gb"])
78                 fs_info[m .. " used_mb"]  = string.format("%.1f", tonumber(u) / fs.unit["mb"])
79                 fs_info[m .. " used_gb"]  = string.format("%.1f", tonumber(u) / fs.unit["gb"])
80                 fs_info[m .. " used_p"]   = p
81                 fs_info[m .. " avail_mb"] = string.format("%.1f", tonumber(a) / fs.unit["mb"])
82                 fs_info[m .. " avail_gb"] = string.format("%.1f", tonumber(a) / fs.unit["gb"])
83                 fs_info[m .. " avail_p"]  = string.format("%d", 100 - tonumber(p))
84             end
85
86             fs_now.size_mb      = fs_info[partition .. " size_mb"]  or "N/A"
87             fs_now.size_gb      = fs_info[partition .. " size_gb"]  or "N/A"
88             fs_now.used         = fs_info[partition .. " used_p"]   or "N/A"
89             fs_now.used_mb      = fs_info[partition .. " used_mb"]  or "N/A"
90             fs_now.used_gb      = fs_info[partition .. " used_gb"]  or "N/A"
91             fs_now.available    = fs_info[partition .. " avail_p"]  or "N/A"
92             fs_now.available_mb = fs_info[partition .. " avail_mb"] or "N/A"
93             fs_now.available_gb = fs_info[partition .. " avail_gb"] or "N/A"
94
95             notification_preset = fs.notification_preset
96             widget = fs.widget
97             settings()
98
99             if notify == "on" and #fs_now.used > 0 and tonumber(fs_now.used) >= 99 and not helpers.get_map(partition) then
100                 naughty.notify({
101                     preset = naughty.config.presets.critical,
102                     title  = "Warning",
103                     text   = partition .. " is empty",
104                 })
105                 helpers.set_map(partition, true)
106             else
107                 helpers.set_map(partition, false)
108             end
109         end)
110
111         local notifycmd = (fs.options and string.format("dfs %s", fs.options)) or "dfs"
112         helpers.async(helpers.scripts_dir .. notifycmd, function(ws)
113             fs.notification_preset.text = ws:gsub("\n*$", "")
114         end)
115     end
116
117     if showpopup == "on" then
118        fs.widget:connect_signal('mouse::enter', function () fs.show(0) end)
119        fs.widget:connect_signal('mouse::leave', function () fs.hide() end)
120     end
121
122     helpers.newtimer(partition, timeout, fs.update)
123
124     return fs
125 end
126
127 return setmetatable(fs, { __call = function(_, ...) return factory(...) end })