datumhom

#!/bin/bash

# Prints date, time, weather for airports. Only reads weather after "often" secs have passed. Needs "metar", and notice "where" to set the ICAO code of location.
# Can use with gltext screensaver (/usr/share/applications/screensavers/gltext.desktop):
# Exec=gltext -root -front -program ~/bin/datumhom

# Metar seems to break regularly. This might help:
export METARURL="https://tgftp.nws.noaa.gov/data/observations/metar/stations/"

# Where to collect from? --> instead do metar set eggd
where="eggd" #Bristol

# How often should we update the weather (in sec)?
often=300

#Echo the date and time
#date +'%y.%m.%e %a, %H:%M'
date +'%y.%m.%d %a, %H:%M'

# Do we have the dir?
if [ ! -d ~/.datumhom ]; then
 mkdir ~/.datumhom
fi

# Do we have the file?
if [ -e ~/.datumhom/hom.txt ]; then

# The file was refreshed at:
 refreshedat=`ls -l --time-style\=+%s ~/.datumhom/hom.txt | awk '{ print$6 }' `

# Time now is, then subtract $often:
 shouldhaverefreshed=`date +%s`
 let shouldhaverefreshed=$shouldhaverefreshed-$often

# If file is too old, refresh:
 if [ $refreshedat -lt $shouldhaverefreshed ]; then
  if [ ! -f "/etc/arch-release" ]; then
   metar -d $where|awk '{ if ($1=="Temperature") print($3 "C"); if ($2=="speed") printf("%.0f" "km/h; ",$4*1.852) }' > ~/.datumhom/hom.txt
  else
   metar get|awk '{ if ($1=="Temperature:") print(substr($4,2) "C"); if ($1=="Wind:") printf("%.0f" "km/h; ",$8*1.852) }' > ~/.datumhom/hom.txt
  fi
 fi
else
# If file doesn't exist, refresh:
 if [ ! -f "/etc/arch-release" ]; then
  metar -d $where|awk '{ if ($1=="Temperature") print($3 "C"); if ($2=="speed") printf("%.0f" "km/h; ",$4*1.852) }' > ~/.datumhom/hom.txt
 else
  metar get|awk '{ if ($1=="Temperature:") print(substr($4,2) "C"); if ($1=="Wind:") printf("%.0f" "km/h; ",$8*1.852) }' > ~/.datumhom/hom.txt
 fi
fi

#Print the file
cat ~/.datumhom/hom.txt