Sample of building pipeline of hledger-rewrite

budget.bash

#!/bin/bash

budget_buckets() {
	if [[ $# -eq 0 ]]; then
		cat  # no more re-writes
	else
		# parse next entry
		local account="${1%% -> *}"
		local budget="Budget:${1##* -> }"
		shift

		# build current query
		local query=("$account" "${ignores[@]}") 

		# prepare negative query for subsequent requests
		local ignores=("${ignores[@]}" and "not:$account")

		# spawn rewriter
		hledger-rewrite -f- "${query[@]}" \
			--add-posting "($budget)  *-1" \
			| budget_buckets "$@" # rewrite with rest of entries
	fi
}

buckets=(
	Expenses:Food
	Expenses:Taxes
	Expenses:Housing:Rent
	'Expenses:Housing:Internet -> Expenses:Communications'
	Expenses:Housing
	Expenses:Medicine
	'Expenses:Grocery -> Expenses:Supplies'
	Expenses:Supplies
	Expenses:Health
	'Expenses:Phone -> Expenses:Communications'
	'Expenses:Delivery -> Expenses:Operations'
	'Expenses:Bank:Fee -> Expenses:Operations'
	Expenses
)

hledger print "$@" | budget_buckets "${buckets[@]}"