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weather.sh
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  1. 55
      README.md
  2. 221
      weather.sh

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README.md
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# BashWeather
A bash script to get the weather from OpenWeatherMap and output to the terminal, Openbox, or HTML
## Contents
1. [About](#1-about)
2. [License](#2-license)
3. [Prerequisites](#3-prerequisites)
4. [How to use](#4-how-to-use)
***
## 1. About
Weather report written in Bash.
`weather.sh` gets the current weather from
[OpenWeatherMap](http://openweathermap.org/) and displays the
results to the terminal, HTML, or for an OpenBox pipe menu. It will
calculate (if appropriate) the "feel like" weather by calculating the
wind chill or heat index. A great deal of basis for this script comes
from [BashWeather](https://github.com/jdotjdot/BashWeather),
[bash-weather](https://github.com/szantaii/bash-weather),
and many more that I forgot to save the URLs of.
## 2. License
This project is licensed under the MIT license. For the full license, see `LICENSE`.
## 3. Prerequisites
* OpenWeatherMap API key ([http://openweathermap.org/appid](http://openweathermap.org/appid)).
* Bash shell ≥ 4.2.
* `bc` basic calculator for floating point arithmetic. Can be found in the `bc` package on major Linux distributions.
* `curl` command-line tool for getting data using HTTP protocol. cURL can be found in the `curl` package on major Linux distributions.
* `grep` command-line tool used for parsing downloaded XML data. `grep` can be found in the `grep` package on major Linux distributions.
## 4. How to use
### Options
At the beginning of the script is a place for your default location and
API key. These will be moved to an `rc` or `ini` file later. You may
also specify them on the commandline.
### Command-line options
`weather.sh` can be started with the following command line options:
* `-k` Specifies OpenWeatherMap API key from the command-line.
* `-l city_name` Sets the city for manual weather lookup.
* `-t` Output to the terminal/stdout (default if no output is specified)
* `-h` Output HTML formatted text
* `-o` Output OpenBox output
* `-f` Use imperial (farenheit, inches Hg, mph) units; default is metric
_Note: If the OpenWeatherMap API key is specified from the command-line, it will override the API key set in the file._

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#!/bin/bash
## TODO: Add rc for things including API key
# TODO: Add in sunrise/sunset calcuations
apiKey="NotARealAPIKey"
defaultLocation="Dayton"
dynamicUpdates=0
OpenBox="False"
Terminal="False"
HTML="False"
degreeCharacter="c"
data=0
lastUpdateTime=0
FeelsLike=0
while [ $# -gt 0 ]; do
option="$1"
case $option
in
-k) apiKey="$2"
shift
shift ;;
-l) defaultLocation="$2"
shift
shift ;;
-d) dynamicUpdates=1
shift ;;
-t) Terminal="True"
shift ;;
-h) HTML="True"
shift ;;
-o) OpenBox="True"
shift ;;
-f) degreeCharacter="f"
shift ;;
esac
done
dataPath="/tmp/wth-$defaultLocation.json"
if [ ! -e $dataPath ];
then
touch $dataPath
data=$(curl "http://api.openweathermap.org/data/2.5/weather?q=$defaultLocation&units=metric&appid=$apiKey")
echo $data > $dataPath
else
data=$(cat $dataPath)
fi
lastUpdateTime=$(($(date +%s) -600))
while true; do
lastfileupdate=$(date -r $dataPath +%s)
if [ $(($(date +%s)-$lastfileupdate)) -ge 600 ];then
data=$(curl -s "http://api.openweathermap.org/data/2.5/weather?q=$defaultLocation&units=metric&appid=$apiKey")
echo $data > $dataPath
fi
if [ $(($(date +%s)-$lastUpdateTime)) -ge 600 ]; then
lastUpdateTime=$(date +%s)
clear
Station=$(echo $data | jq -r .name)
Lat=$(echo $data | jq -r .coord.lat)
Long=$(echo $data | jq -r .coord.lon)
Country=$(echo $data | jq -r .sys.country)
####################################################################
# Current conditions (and icon)
####################################################################
icons=$(echo $data | jq -r .weather[].icon | tr '\n' ' ')
iconval=${icons%?}
case $iconval in
01*) icon="☀️";;
02*) icon="🌤";;
03*) icon="🌥";;
04*) icon="☁";;
09*) icon="🌧";;
10*) icon="🌦";;
11*) icon="🌩";;
13*) icon="🌨";;
50*) icon="🌫";;
esac
ShortWeather=$(echo $data | jq -r .weather[].main | tr '\n' ' ')
LongWeather=$(echo $data | jq -r .weather[].description | sed -E 's/\S+/\u&/g' | tr '\n' ' ')
####################################################################
# Temperature
####################################################################
tempinc=$(echo $data | jq -r .main.temp)
RawTemp=$(echo $data | jq -r .main.temp)
temperature=$tempinc
if [ "$degreeCharacter" = "f" ]; then
temperature=$(echo "scale=2; 32+1.8*$tempinc" | bc)
fi
####################################################################
# Parse Wind Info
####################################################################
wind=$(echo $data | jq .wind.deg)
winddir=$((2193-(${wind%.*}+45)/90))
if [ $winddir -eq 2192 ]; then
winddir=2190
elif [ $winddir -eq 2190 ];then
winddir=2192
else
:
fi
RawWindSpeed=$(echo $data | jq .wind.speed)
WindSpeed=$(echo $data | jq .wind.speed)
WindGusts=$(echo $data | jq .wind.gust)
#Conversion
if [ "$degreeCharacter" = "f" ]; then
WindSpeed=$(echo "scale=2; $WindSpeed*0.6213712" | bc | xargs printf "%.2f")
WindGusts=$(echo "scale=2; $WindGusts*0.6213712" | bc | xargs printf "%.2f")
windunit="mph"
else
WindGusts=$(echo "scale=2; $WindGusts*1" | bc)
windunit="kph"
fi
Humidity=$(echo $data | jq .main.humidity)
CloudCover=$(echo $data | jq .clouds.all)
####################################################################
# Feels Like Calculations
# Using the raw metric value for criteria, then converting later
####################################################################
# Wind Chill
####################################################################
if (( $(bc -l<<<"$RawWindSpeed > 4.5") )); then #windspeed criteria for windchill
if (( $(bc -l<<<"$RawTemp< 11") )); then #temp criteria for windchill
FeelsLike=1
if [ "degreeCharacter" = "f" ];then
WindSpeedExp=$(echo "e(0.16*l($WindSpeed))" | bc -l )
FeelsLikeTemp=$(echo "scale=2; 35.74 + 0.6215*$temperature - 35.75*$WindSpeedExp + 0.4275*$temperature*$WindSpeedExp" | bc | xargs printf "%.2f")
else
WindSpeedExp=$(echo "e(0.16*l($WindSpeed))" | bc -l )
FeelsLikeTemp=$(echo "scale=2; 13.12 + 0.6215*$temperature - 11.37*$WindSpeedExp + 0.3965*$temperature*$WindSpeedExp" | bc | xargs printf "%.2f")
fi
fi
fi
####################################################################
# Heat Index
# I can only find Farenheit calcuations, so....
####################################################################
if [ "$degreeCharacter" = "c" ]; then
HITemp=$(echo "scale=2; 32+1.8*$tempinc" | bc)
else
HITemp=$RawTemp
fi
if (( $(bc -l<<<"$HITemp> 79") )); then #temp criteria for heat index
FeelsLike=1
FeelsLikeTemp=$(echo "scale=2;0.5 * ($HITemp + 61.0 + (($HITemp-68.0)*1.2) + ($Humidity*0.094))" | bc)
if [ "$degreeCharacter" = "c" ];then
FeelsLikeTemp=$(echo "scale=2; ($FeelsLikeTemp-32) / 1.8" | bc)
fi
fi
####################################################################
# Pressure Data
####################################################################
pressure=$(echo $data | jq .main.pressure)
if [ "$degreeCharacter" = "f" ]; then
pressure=$(echo "scale=2; $pressure/33.863886666667" | bc)
pressureunit="in"
else
pressureunit="hPa"
fi
fi
AsOf=$(date +"%Y-%m-%d %R" -d @$lastfileupdate)
if [ "$Terminal" = "True" ];then
echo "Station: $Station, $Country $Lat / $Long"
echo "As Of: $AsOf "
echo "Current Conditions: $icon $LongWeather"
#echo "$icon $ShortWeather"
echo "Temp: $temperature °${degreeCharacter^^}"
if [ "$FeelsLike" = "1" ];then
echo "Feels Like: $FeelsLikeTemp °${degreeCharacter^^}"
fi
echo "Pressure: $pressure $pressureunit"
echo -e \\u$winddir "$WindSpeed$windunit Gusts: $WindGusts$windunit"
echo "Humidity: $Humidity%"
echo "Cloud Cover: $CloudCover%"
fi
if [ "$OpenBox" = "True" ]; then
echo '<openbox_pipe_menu>'
echo '<separator label="Weather" />'
printf '<item label="Station: %s, %s" />\n' "$Station" "$Country"
printf '<item label="As of %s" />\n' "$AsOf"
printf '<item label="Now: %s %s" />\n' "$icon" "$LongWeather"
printf '<item label="Temp: %s%s" />\n' "$temperature" "°${degreeCharacter^^}"
if [ "$FeelsLike" = "1" ];then
printf '<item label="Feels Like: %s%s" />\n' "$FeelsLikeTemp" "°${degreeCharacter^^}"
fi
printf '<item label="Pressure: %s%s" />\n' "$pressure" "$pressureunit"
printf '<item label="Wind: %s%s Gusts: %s%s" />\n' "$WindSpeed" "$windunit" "$WindGusts" "$windunit"
printf '<item label="Humidity: %s%%" />\n' "$Humidity"
printf '<item label="Cloud Cover: %s%%" />\n' "$CloudCover"
echo '</openbox_pipe_menu>'
fi
if [ "$HTML" = "True" ];then
echo "Station: $Station, $Country $Lat / $Long <br />"
echo "As Of: $AsOf <br />"
echo "Current Conditions: $icon $LongWeather <br />"
#echo "$icon $ShortWeather"
echo "Temp: $temperature °${degreeCharacter^^} <br />"
if [ "$FeelsLike" = "1" ];then
echo "Feels Like: $FeelsLikeTemp °${degreeCharacter^^} <br />"
fi
echo "Pressure: $pressure $pressureunit <br />"
echo -e \\u$winddir "$WindSpeed$windunit Gusts: $WindGusts$windunit <br />"
echo "Humidity: $Humidity% <br />"
echo "Cloud Cover: $CloudCover% <br />"
fi
if [ $dynamicUpdates -eq 0 ];then
break
fi
done
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