Sums time in Jira format and prints out the total number of hours.

jira2hours.sh

#!/bin/sh

#########################################################################
#                                                                       #
#  Sums times in Jira format and prints out the total number of hours.  #
#  Include space to separate each number from its unit.                 #
#                                                                       #
#  Example usage:                                                       #
#                                                                       #
#    $ jira2hours 1 d 2 h 1 w 4 h 30 m                                  #
#    > 42.5                                                             #
#                                                                       #
#########################################################################

# Set to match your Jira team's time tracking settings
WORKING_DAYS_PER_WEEK=5
WORKING_HOURS_PER_DAY=6

PRELUDE="\
: m + ; \
: h 60 * m ; \
: d $WORKING_HOURS_PER_DAY * h ; \
: w $WORKING_DAYS_PER_WEEK * d ; \
: start 0 ; \
: finish s>f 60e0 f/ f. cr ;"

if [ -x "$FORTH" ]
then
    # Unknown forth. Probably accepts commands over stdin.
    forthexec() {
        echo "$*" | $FORTH
    }
elif [ -x "$(command -v gforth)" ]
then
    # Use GNU forth
    forthexec() {
        gforth -e "$*"
    }
elif [ -x "$(command -v pforth)" ]
then
    # Use pForth
    forthexec() {
        echo "$*" | pforth
    }
else
    cat <<EOF
No Forth interpreter could be found.
Install GNU Forth (gforth) or set FORTH to point to a Forth interpreter.
EOF
    exit 1
fi

forthexec "$PRELUDE start $* finish bye"