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dotfiles/tmux/powerline/segments/wan_ip.sh
2019-01-12 18:22:02 +01:00

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# Prints the WAN IP address. The result is cached and updated according to $update_period.
run_segment() {
local tmp_file="${TMUX_POWERLINE_DIR_TEMPORARY}/wan_ip.txt"
local wan_ip
if [ -f "$tmp_file" ]; then
if shell_is_osx || shell_is_bsd; then
stat >/dev/null 2>&1 && is_gnu_stat=false || is_gnu_stat=true
if [ "$is_gnu_stat" == "true" ];then
last_update=$(stat -c "%Y" ${tmp_file})
else
last_update=$(stat -f "%m" ${tmp_file})
fi
elif shell_is_linux || [ -z $is_gnu_stat]; then
last_update=$(stat -c "%Y" ${tmp_file})
fi
time_now=$(date +%s)
update_period=900
up_to_date=$(echo "(${time_now}-${last_update}) < ${update_period}" | bc)
if [ "$up_to_date" -eq 1 ]; then
wan_ip=$(cat ${tmp_file})
fi
fi
if [ -z "$wan_ip" ]; then
wan_ip=$(curl --max-time 2 -s http://whatismyip.akamai.com/)
if [ "$?" -eq "0" ]; then
echo "${wan_ip}" > $tmp_file
elif [ -f "${tmp_file}" ]; then
wan_ip=$(cat "$tmp_file")
fi
fi
if [ -n "$wan_ip" ]; then
echo "${wan_ip}"
fi
return 0
}