GnuCash, Ledger and the command line

Move your data in and out, and script reports.

GnuCash

FinvestLens reads and writes GnuCash XML, so you can move a book either way without losing detail — accounts, splits, prices, schedules and business records all survive the trip.

Ledger journals

File ▸ Export ▸ Ledger Journal… (⇧⌘E) writes a plain-text Ledger journal, and File ▸ Import ▸ Ledger Journal… reads one back.

The finlens command line

finlens is a read-only command-line reporter over your book, modelled on Ledger's. It is safe to run while the app has the book open — it takes no lock and never writes.

`finlens -f Book.finvestlens bal`	Account balances.
`finlens -f Book.finvestlens reg Groceries`	A register of matching postings.
`finlens -f Book.finvestlens print`	The book as a Ledger journal.