jamlog

#!/bin/bash

IDIR="${BASH_SOURCE%/*}"
if [[ ! -d "$IDIR" ]]; then IDIR="$PWD"; fi
source "$IDIR/inc/misc_tools.sh"

die() {
    printf '%s\n' "$1" >&2
    exit 1
}

show_usage() {
    cat << EOF
Extracts the logs written by the C nodes and displays them in the terminal.

Usage: jamlog [--program=pgm --app=app_name] [--msg] [--j]

jamlog
Extracts the logs from the last program that was run or is running.

jamlog --program=stringlog --app=q5
Extracts the logs from the execution of stringlog under the application ID q5
if logs from such a run exists.

jamlog --msg
Puts a message line in the log file to indicate that the log was displayed
up to that point.

jamlog --j
Extracts the logs created by the J node.

EOF
}


###
# Main script execution begins here...
#

jamfolder=$HOME"/__jamruns"
exit_missingdir $jamfolder "__jamruns folder missing. JAMScript tools not setup?"

appsfolder=$jamfolder/apps
exit_missingdir $appsfolder "No logs to show!"

cd $appsfolder

j=

while :; do
    case $1 in
        -h|-\?|--help)
            show_usage      # Display a usage synopsis.
            exit
            ;;
        -a|--app)           # Takes an option argument; ensure it has been specified.
            if [ "$2" ]; then
                app=$2
                shift
            else
                die 'ERROR: "--app" requires a non-empty option argument.'
            fi
            ;;
        --app=?*)
            app=${1#*=}     # Delete everything up to "=" and assign the remainder.
            ;;
        --app=)            # Handle the case of an empty
            die 'ERROR: "--app" requires a non-empty option argument.'
            ;;

        -p|--program)           # Takes an option argument; ensure it has been specified.
            if [ "$2" ]; then
                program=$2
                shift
            else
                die 'ERROR: "--program" requires a non-empty option argument.'
            fi
            ;;
        --program=?*)
            program=${1#*=}     # Delete everything up to "=" and assign the remainder.
            ;;
        --program=)            # Handle the case of an empty
            die 'ERROR: "--program" requires a non-empty option argument.'
            ;;
        -m|--msg)
            msg=1
            ;;
        -j|--j)
            j=1
            ;;

            *)               # Default case: No more options, so break out of the loop.
        break
    esac
    shift
done


if [ -z $app ] && [ -z $program ]; then
    # no args specified.. get it from previous runs
    program=`cat $appsfolder/program`
    app=`cat $appsfolder/app`
fi

echo $appsfolder/$program"_"$app

if [ -e $appsfolder/$program"_"$app/log ]; then
    if [ -z $j ]; then
        cat $appsfolder/$program"_"$app/log

        if [ ! -z $msg ]; then
            echo >> $appsfolder/$program"_"$app/log
            echo "========================= >> log displayed >> " `date` >> $appsfolder/$program"_"$app/log
            echo >> $appsfolder/$program"_"$app/log
        fi
    else
        cat $appsfolder/$program"_"$app/log.j

        if [ ! -z $msg ]; then
            echo >> $appsfolder/$program"_"$app/log.j
            echo "========================= >> log displayed >> " `date` >> $appsfolder/$program"_"$app/log.j
            echo >> $appsfolder/$program"_"$app/log.j
        fi
    fi
fi