Convert CSV files

Here's a quick example of converting a CSV file.

Say we have downloaded checking.csv from a bank for the first time:

"2012/3/23","TRANSFER TO SAVINGS","-10.00"

We tell hledger how to intepret this with a file named checking.csv.rules, using the CSV rules syntax. Eg:

# skip the first CSV line (headings)
skip 1

# use the first three fields in each CSV record as transaction date, description and amount respectively
fields   date, description, amount

# prepend $ to CSV amounts
currency $

# always set the first account to assets:bank:checking
account1 assets:bank:checking

# if the CSV record contains ‘SAVINGS’, set the second account to assets:bank:savings
# (if not set, it will be expenses:unknown or income:unknown)
  account2 assets:bank:savings

Now hledger can read this CSV file as journal data:

$ hledger -f checking.csv print
using conversion rules file checking.csv.rules
2012/03/22 DEPOSIT
    income:unknown             $-50.00
    assets:bank:checking        $50.00

    assets:bank:savings         $10.00
    assets:bank:checking       $-10.00

We might save this output as checking.journal, and/or merge it (manually) into the main journal file. We could also run other commands:

$ hledger -f checking.csv balance
using conversion rules file checking.csv.rules
              $50.00  assets:bank
              $40.00    checking
              $10.00    savings
             $-50.00  income:unknown