nightscout-ps1-daemon
v2.1.1
Published
Syncs the latest blood glucose reading from Nightscout to an ini file
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nightscout-ps1-daemon
Periodically syncs the latest entry from Nightscout to a source-able file,
so that you can include your latest blood glucose entry in your terminal
prompt (also known as the $PS1
variable).
The trend and target high/low values are also provided, so that you may render arrows and colors as desired:
Installation
Preferred installation is by downloading a pre-compiled binary for your platform:
If there is no binary for your platform, or you would simply like to install
from source, do so from npm
:
$ npm install -g nightscout-ps1-daemon
Configure your $PS1
As a programmer, your $PS1
is a highly intimate thing which you should take some
time to create a setup that is pleasing to you. After all, you are staring at it
all day. That said, how you use the nightscout-ps1
variables is up to you!
However, for convenience, the setup from the screenshots above is included here as
well. OK, on to the technical stuff.
The main key is to source
the ~/.bgl-cache
file in a function which gets
executed in the $PS1
. The cache file looks something like:
local nightscout_ts="1513457266000"
local nightscout_bgl="104"
local nightscout_trend="FortyFiveDown"
local nightscout_target_top="180"
local nightscout_target_bottom="80"
local nightscout_mgdl="104"
local nightscout_mills="1513457266000"
local nightscout_device="share2"
local nightscout_direction="FortyFiveDown"
local nightscout_scaled="104"
To achieve a setup similar to the screenshots above, include the code below as a
starting point. Typically you define your $PS1
in your .bashrc
, .profile
,
or other similar files that get executed every time a shell session is started.
RED="$(tput setaf 1 2>/dev/null || echo '')"
GREEN="$(tput setaf 2 2>/dev/null || echo '')"
YELLOW="$(tput setaf 3 2>/dev/null || echo '')"
NO_COLOR="$(tput sgr0 2>/dev/null || echo '')"
function __ps1_bgl {
source ~/.bgl-cache
local trend="?"
case "${nightscout_trend}" in
DoubleUp) trend="⇈";;
SingleUp) trend="↑";;
FortyFiveUp) trend="↗";;
Flat) trend="→";;
FortyFiveDown) trend="↘";;
SingleDown) trend="↓";;
DoubleDown) trend="⇊";;
esac
if [ "${nightscout_bgl}" -ge "${nightscout_target_top}" ]; then
printf "\001${YELLOW}\002"
elif [ "${nightscout_bgl}" -le "${nightscout_target_bottom}" ]; then
printf "\001${RED}\002"
else
printf "\001${GREEN}\002"
fi
printf "%03d %s" "${nightscout_bgl}" "${trend}"
printf "\001${NO_COLOR}\002"
}
export PS1="\$(__ps1_bgl) $ "
Remember to customize the $PS1
further as you like! Restart your shell
session, or source
the file again to see the changes in effect.
Setup on macOS
cp service/io.n8.nightscout-ps1.plist ~/Library/LaunchAgents/
launchctl load ~/Library/LaunchAgents/io.n8.nightscout-ps1.plist
Setup on Linux
cp service/nightscout-ps1.service /etc/systemd/system/
sudo systemd start nightscout-ps1
sudo systemd enable nightscout-ps1
Setup on Windows
Check out this blog post by Scott Hanselman to setup as a Windows Service: