Filter CSV transactions that are not present in a repository.

This command accepts a CSV file of financial transactions and prints records that are not found in a repository of CSV files. Its usage:

filtercsvxacts CSV-FILE-WITH-NOVEL-RECORDS [REPOSITORY-CSV-FILE]...

Records in the first argument that are already present in the repository are excluded. Duplicate records are accounted for.

You can pass directories in place of files, in which case the command walks directories for CSV files. All CSV file names must include the suffix .csv.

filtercsvxacts parses RFC 4180 CSV files and prints their contents. It tolerates LF alone as a record separator, recognizes quoted substrings within fields, and assumes that the CSV document includes a header. For example, using Stack:

$ echo -n '
№,Name
1,Foxy Badger
2,"""Dreary"" Hog"
3,"Furry
 Walrus"
4,Absent "Owl, Esq."
' | tail -n +2 >example.csv && stack run example.csv
№,Name
1,Foxy Badger
2,"""Dreary"" Hog"
3,"Furry
 Walrus"
4,"Absent Owl, Esq."