#!/bin/sh

# Description:
#   Print the revision file if it is up-to-date, where up-to-date-ness is
#   determined by comparing the time stamp to one of the binaries.
# This script expects to be run from the run directory.
# Usage:
#   pc_print_revision_file src/start.x
#   pc_print_revision_file src/run.x


get_revision_filename () {
    if [ -z $PENCIL_HOME ]; then
        echo "Error: \$PENCIL_HOME must be set."
        exit 1
    fi

    rf="src/$(${PENCIL_HOME}/utils/pc_identify_revision --print-file-name)"
    if [ -z "${rf}" ]; then
        echo 'Error: Cannot get revision file name'
        exit 1
    fi

    echo "${rf}"
}


print_info () {
    if [ -z "$1" ]; then
        echo "Usage: pc_print_revison <binary>"
        exit 1
    fi

    binary="$1"
    if [ ! -e ${revision_file} ]; then
        echo "Error: Revision file ${revision_file} does not exist"
        exit 1
    fi
    if [ ! -e ${binary} ]; then
        echo "Error: Binary file ${binary} does not exist"
        exit 1
    fi

    echo
    echo '=============== Start revision info ==============='
    echo

    if [ ${revision_file} -ot ${binary} ]; then
        echo "${revision_file} is not up to date."
    else
        cat < ${revision_file}
    fi

    echo
    echo '===============  End revision info  ==============='
    echo
}


revision_file=$(get_revision_filename)
print_info "$@"