#!/usr/bin/env bash
# hledger-dc JOURNALFILE CMD [ARGS]
#  run a hledger command on a journal file which also supports Dr/Cr before the account name,
#  instead of/in addition to amount signs.

# If a posting begins with Dr<WHITESPACE>, remove that.
# If it begins with Cr<WHITESPACE> and contains no number, remove that.
# If it begins with Cr<WHITESPACE>, remove that and add a minus sign before the next number, and if that leaves a double minus, cancel those out.
dc2sign() { sed -E -e 's/^(\s+)Dr\s+/\1/' -e 's/^(\s+)Cr\s+([^0-9]+)$/\1\2/' -e 's/^(\s+)Cr\s+([^0-9]+)([0-9])/\1\2-\3/' -e 's/--([0-9])/\1/'; }

dc2sign <"$1" | hledger -f- "${@:2}"


# Example:
#
# $ cat sample.journaldc 
# 2025-01-01 salary
#     Cr revenues            800 USD
#     Dr assets

# $ hledger -f sample.journaldc print
# 2025-01-01 salary
#     Cr revenues         800 USD
#     Dr assets

# $ hledger dc sample.journaldc print
# 2025-01-01 salary
#     revenues        -800 USD
#     assets