home/bin/today

   1 #! /bin/bash
   2
   3 set -e
   4
   5 DIR_DATA="$HOME/var/run/today"
   6 FILE_WEATHER="$DIR_DATA/weather"
   7
   8 mkdir -p "$DIR_DATA"
   9
  10 repeat() {
  11     x="$1"
  12     n="$2"
  13     awk -v x="$x" -v n="$n" 'BEGIN {for (i=1; i<=n; i++) {printf x}}'
  14 }
  15
  16 bar=$(repeat '-' '80')
  17 ts_fmt='+%A, %Y %B %d, %H:%M:%S'
  18 ts_lang='el_GR.UTF-8'
  19 timestamp_local=$(LANG="$ts_lang"                 date "$ts_fmt")
  20 timestamp_west=$( LANG="$ts_lang" TZ='US/Pacific' date "$ts_fmt")
  21 timestamp_pl=$(   LANG="$ts_lang" TZ='Poland'     date "$ts_fmt")
  22 timestamp_nz=$(   LANG="$ts_lang" TZ='NZ'         date "$ts_fmt")
  23
  24 ip_addresses=$(
  25     ip addr \
  26     | awk '
  27         /^[0-9]+:/ {
  28             interface = $2
  29             sub(":$", "", interface)
  30             interfaces[++interface_count] = interface
  31         }
  32
  33         /^ +inet +/ {
  34             addr = $2
  35             sub("/[0-9]+$", "", addr)
  36             addrs[interface] = addr
  37         }
  38
  39         END {
  40             for (i=1; i<=interface_count; i++) {
  41                 interface = interfaces[i]
  42                 print interface, addrs[interface]
  43             }
  44         }' \
  45     | column -t
  46 )
  47
  48 weather_fetch() {
  49     curl "http://wttr.in/${ZIP_CODE}?1" \
  50     1> "$FILE_WEATHER" \
  51     2> /dev/null
  52 }
  53
  54 weather_file_age() {
  55     echo $(( $(date +%s) - $(stat -c '%Y' "$FILE_WEATHER") ))
  56 }
  57
  58 weather_get_or_fetch() {
  59     weather_file_age_limit=$(( 3 * 60 * 60 ))
  60     if [[ ! -e $FILE_WEATHER || weather_file_age -ge $weather_file_age_limit ]]
  61     then
  62         weather_fetch
  63     fi
  64     cat "$FILE_WEATHER"
  65 }
  66
  67 weather="$(weather_get_or_fetch)"
  68
  69 clear
  70 #LANG="$ts_lang" ncal -M $(date +%Y)
  71 LANG="$ts_lang" ncal -M
  72 echo "$bar"
  73 (
  74     echo 'LOCAL'       ',' "$timestamp_local"
  75     echo 'Pacific'     ',' "$timestamp_west"
  76     echo 'Poland'      ',' "$timestamp_pl"
  77     echo 'New Zealand' ',' "$timestamp_nz"
  78 ) \
  79 | column -ts,
  80 echo "$bar"
  81 echo "$ip_addresses"
  82 echo "$bar"
  83 echo ''
  84 echo "Fetched on: $(stat -c %y $FILE_WEATHER)"
  85 echo "$weather"
  86 echo ''