My blog live reviewer

live_preview.py

#!/usr/bin/env python3
from livereload import Server, shell
from sys import argv

class live_view:
    def __init__(self):
        self.sv = Server()
        self.is_run = False

    def __enter__(self):
        return self
    
    def run(self, is_open):
        self.is_run = True
        self.sv.watch('./content', shell('make html -f ./Makefile'))
        if is_open:
            self.sv.serve(open_url_delay=1, debug=False, root='./output', port=8000, host='localhost')
        else:
            self.sv.serve(root='./output', port=8000, host='localhost')

    def __exit__(self, exception_t, exception_v, traceback):
        if self.is_run == False:
            self.run(False)

def run(is_open):
    with live_view() as lv:
        lv.run(is_open)

def main():
    if len(argv) == 2 and argv[1] == 'browse':
        run(True)
    elif len(argv) >= 2:
        print ('Usage: {} [OPTION]\nOPTION:\n\tbrowse -- Opening new page in default browser.'.format(argv[0]))
    else:
        run(False)

if __name__ == '__main__':
    main()

live_preview.sh

#!/bin/bash

BASE_DIR=$(pwd)
LIVE_PREV_PID=${BASE_DIR}/live_preview.pid
GREEN=$(tput setaf 2)
RED=$(tput setaf 1)
NORMAL=$(tput sgr0)
COLUMNS=$(tput cols)

alive() {
    kill -0 $1 >/dev/null 2>&1
}

failed_message() {
    failed="[Failed]"
    cl_width=$(($COLUMNS-$1))
    printf '%s%*s%s\n' "$RED" $cl_width "$failed" "$NORMAL"
}

ok_message() {
    ok="[OK]"
    cl_width=$(($COLUMNS-$1))
    printf '%s%*s%s\n' "$GREEN" $cl_width "$ok" "$NORMAL"
}

usage() {
    echo -e "Usage: $0 [OPTION]\nOPTION"
    echo -e "\tstart [start_option] -- start live preview on background\n\tstart_option:\n\t\tbrowse -- Opening new page in default browser\n"
    echo -e "\tstop -- stop live preview on background\n"
    exit 1
}

shut_down() {
    mes="shutting down live preview..."
    echo -n $mes

    if [ ! -e $LIVE_PREV_PID ]; then
        failed_message ${#mes}
        echo "not found pid file in ${BASE_DIR}"
        exit 1
    fi

    pid=$(cat $LIVE_PREV_PID)
    if alive $pid; then
        kill $pid
        while alive $pid; do
            sleep 0.5
        done
        ok_message ${#mes}
    else
        failed_message ${#mes}
        echo "stale pid detected, cleaning"
    fi
    rm $LIVE_PREV_PID
}

start_up() {
    if [ -e $LIVE_PREV_PID ]; then
        echo "Pid file detected. Checking status..."
        pid=$(cat $LIVE_PREV_PID)
        if alive $pid; then
            echo "Live preview is alive, restarting"
            shut_down
            start_up $1
        else
            echo "stale pid detected, cleaning and restarting"
            rm $LIVE_PREV_PID
            start_up $1
        fi
    else
        if [ $# -eq 1 ] && [ $1 != "browse" ]; then
            ./live_preview.py
        else
            echo "starting live preview..."
            ./live_preview.py $1 &
            pid=$!
            echo $pid > $LIVE_PREV_PID
        fi
    fi
}

### main

if [ $# -eq 0 ] || [ $1 != "start" -a $1 != "stop" ]; then
    usage
elif [ $1 = "start" ]; then
    start_up $2
elif [ $1 = "stop" ]; then
    shut_down
fi

requirements.txt

livereload==2.5.2