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added watch use case examples (#90)

This commit is contained in:
Luke Bonham 2017-04-07 21:41:00 +02:00 committed by Daniel Hahler
parent c22b63227a
commit c6638db63a
2 changed files with 173 additions and 3 deletions
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6
recipes.mdwn
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@ -10,10 +10,11 @@ The recipes section is where you can find useful snippets and tutorials on how t
## Widgets
* [Lain Widget Library](https://github.com/copycat-killer/lain)
* [Lain](https://github.com/copycat-killer/lain)
* [Vicious](https://github.com/Mic92/vicious)
* [[Countdown|recipes/countdown]]
* [[MPD current song|recipes/mpc]]
* [[Watchers|recipes/watch]]
## Libraries
@ -24,8 +25,9 @@ The recipes section is where you can find useful snippets and tutorials on how t
## Themes
* [Awesome-Copycats Themes](https://github.com/copycat-killer/awesome-copycats)
* [awesome-copycats](https://github.com/copycat-killer/awesome-copycats)
## Others
* [[Swap Monitor Snippet|recipes/xrandr]]
* [Awesome-Revelation - Mac OSX like 'Expose' view of all clients.](https://github.com/guotsuan/awesome-revelation)

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# [`awful.util.watch`](https://awesomewm.org/doc/api/classes/awful.widget.watch.html) use case examples
## bitcoin
Requires `curl` and [dkjson](https://github.com/LuaDist/dkjson) or [lain](https://github.com/copycat-killer/lain).
```lua
local bitcoin = awful.widget.watch(
"curl -m5 -s 'https://coinbase.com/api/v1/prices/buy'",
43200, -- half day
function(widget, stdout)
local btc, pos, err = require("dkjson").decode(stdout, 1, nil) -- dkjson
--local btc, pos, err = require("lain.util").dkjson.decode(stdout, 1, nil) -- lain
local btc_price = (not err and btc and btc["subtotal"]["amount"]) or "N/A"
-- customize here
widget:set_text(btc_price)
end
)
```
## brtfs
```lua
-- btrfs root df
local myrootfs = awful.widget.watch(
"btrfs filesystem df -g /",
600, -- 10 minutes
function(widget, stdout)
local total, used = string.match(stdout, "Data.-total=(%d+%.%d+)GiB.-used=(%d+%.%d+)GiB")
local percent_used = math.ceil((tonumber(used) / tonumber(total)) * 100)
-- customize here
widget:set_text(" [/: " .. percent_used .. "%] ")
end
)
```
## cmus
```lua
-- cmus audio player
local cmus, cmus_timer = awful.widget.watch(
"cmus-remote -Q",
2,
function(widget, stdout)
local cmus_now = {
state = "N/A",
artist = "N/A",
title = "N/A",
album = "N/A"
}
for w in string.gmatch(stdout, "(.-)tag") do
a, b = w:match("(%w+) (.-)\n")
cmus_now[a] = b
end
-- customize here
widget:set_text(cmus_now.artist .. " - " .. cmus_now.title)
end
)
```
## maildir
```lua
-- checks whether there are files in the "new" directories of a mail dirtree
local mailpath = "~/Mail"
local mymaildir = awful.widget.watch(
{ awful.util.shell, "-c", string.format("ls -1dr %s/*/new/*", mailpath) },
60,
function(widget, stdout)
local inbox_now = { digest = "" }
for dir in stdout:gmatch(".-/(%w+)/new") do
inbox_now[dir] = 1
for _ in stdout:gmatch(dir) do
inbox_now[dir] = inbox_now[dir] + 1
end
if #inbox_now.digest > 0 then inbox_now.digest = inbox_now.digest .. ", " end
inbox_now.digest = inbox_now.digest .. string.format("%s (%d)", dir, inbox_now[dir])
end
-- customize here
widget:set_text("mail: " .. inbox_now.digest)
end
)
```
## mpris
```lua
-- infos from mpris clients such as spotify and VLC
-- based on https://github.com/acrisci/playerctl
local mpris, mpris_timer = awful.widget.watch(
{ awful.util.shell, "-c", "playerctl status && playerctl metadata" },
2,
function(widget, stdout)
local escape_f = require("awful.util").escape
local mpris_now = {
state = "N/A",
artist = "N/A",
title = "N/A",
art_url = "N/A",
album = "N/A",
album_artist = "N/A"
}
mpris_now.state = string.match(stdout, "Playing") or
string.match(stdout, "Paused") or "N/A"
for k, v in string.gmatch(stdout, "'[^:]+:([^']+)':[%s]<%[?'([^']+)'%]?>")
do
if k == "artUrl" then mpris_now.art_url = v
elseif k == "artist" then mpris_now.artist = escape_f(v)
elseif k == "title" then mpris_now.title = escape_f(v)
elseif k == "album" then mpris_now.album = escape_f(v)
elseif k == "albumArtist" then mpris_now.album_artist = escape_f(v)
end
end
-- customize here
widget:set_text(mpris_now.artist .. " - " .. mpris_now.title)
end
)
```
## upower
```lua
-- battery infos from freedesktop upower
local mybattery = awful.widget.watch(
{ awful.util.shell, "-c", "upower -i /org/freedesktop/UPower/devices/battery_BAT | sed -n '/present/,/icon-name/p'" },
30,
settings = function(widget, stdout)
local bat_now = {
present = "N/A",
state = "N/A",
warninglevel = "N/A",
energy = "N/A",
energyfull = "N/A",
energyrate = "N/A",
voltage = "N/A",
percentage = "N/A",
capacity = "N/A",
icon = "N/A"
}
for k, v in string.gmatch(stdout, '([%a]+[%a|-]+):%s*([%a|%d]+[,|%a|%d]-)') do
if k == "present" then bat_now.present = v
elseif k == "state" then bat_now.state = v
elseif k == "warning-level" then bat_now.warninglevel = v
elseif k == "energy" then bat_now.energy = string.gsub(v, ",", ".") -- Wh
elseif k == "energy-full" then bat_now.energyfull = string.gsub(v, ",", ".") -- Wh
elseif k == "energy-rate" then bat_now.energyrate = string.gsub(v, ",", ".") -- W
elseif k == "voltage" then bat_now.voltage = string.gsub(v, ",", ".") -- V
elseif k == "percentage" then bat_now.percentage = tonumber(v) -- %
elseif k == "capacity" then bat_now.capacity = string.gsub(v, ",", ".") -- %
elseif k == "icon-name" then bat_now.icon = v
end
end
-- customize here
widget:set_text("Bat: " .. bat_now.percentage .. " " .. bat_now.state)
end
)
```