Example: csvreplace
If you build the package with the Cabal flag -fbuildExamples
then the program csvreplace
will be built.
It allows you to replace placeholders in a template file
according to the columns of a CSV file.
E.g. given a file template.txt
with content
Name: FIRSTNAME SURNAME
Born: BIRTH
and names.csv
with content
"FIRSTNAME","SURNAME",BIRTH
"Georg","Cantor",1845
"Haskell","Curry",1900
"Ada","Lovelace",1815
the call
csvreplace template.txt <names.csv
produces the output
Name: Georg Cantor
Born: 1845
Name: Haskell Curry
Born: 1900
Name: Ada Lovelace
Born: 1815
You may also generate one file per CSV row in the following manner:
csvreplace --multifile=FIRSTNAME-SURNAME.txt template.txt <names.csv
Character Encoding
For simple replacement of parts of the text
we would not need to decode the input texts
and thus we would not need to know the used encoding scheme.
Essentially, we would only require that both CSV and template file
employ the same character encoding.
However, it is not as simple as that.
We need to decode the structure of the CSV file.
In multi-file mode we also need to generate proper file names.
Both requirements force us to decode both CSV and template file.
For the de- and encoding we use the default locale encoding.
If you want essentially a byte-by-byte replacement
and you assert that all files are in the same encoding
where the commas and quotation marks are compatible with ASCII
then you can set the encoding locally
to a complete 8-bit encoding like latin1
as in:
LANG=de_DE csvreplace --multifile=FIRSTNAME-SURNAME.txt template.txt <names.csv