target-csv

A Singer target that generates CSV files.

Built with the Meltano SDK for Singer Taps and Targets.

Capabilities

• target

Settings

Setting	Required	Default	Description
output_path	False	None	Filesystem path where to store output files. By default, the current working directory will be used.
file_naming_scheme	False	{stream_name}.csv	The scheme with which output files will be named. Naming scheme may leverage any of the following substitutions: - {stream_name} - {datestamp} - {timestamp}
datestamp_format	False	%Y-%m-%d	A python format string to use when outputting the {datestamp} string. For reference, see: https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes
timestamp_format	False	%Y-%m-%d.T%H%M%S	A python format string to use when outputting the {timestamp} string. For reference, see: https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes
timestamp_timezone	False	UTC	The timezone code or name to use when generating {timestamp} and {datestamp}. Defaults to 'UTC'. For a list of possible values, please see: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
stream_maps	False	None	Allows inline stream transformations and aliasing. For more information see: https://sdk.meltano.com/en/latest/stream_maps.html
record_sort_property_name	False	None	A property in the record which will be used as a sort key. If this property is omitted, records will not be sorted.
overwrite_behavior	False	replace_file	Determines the overwrite behavior if destination file already exists. Must be one of the following string values: - append_records (default) - append records at the insertion point - replace_file - replace entire file using default_CSV_template
escape_characters	False	None	A string of characters to escape when writing CSV files.

A full list of supported settings and capabilities is available by running: target-csv --about

Installation

pipx install git+https://github.com/MeltanoLabs/target-csv.git

Usage

You can easily run target-csv by itself or in a pipeline using Meltano.

Executing the Target Directly

target-csv --version
target-csv --help

# Test using the "Carbon Intensity" sample:
tap-carbon-intensity | target-csv --config /path/to/target-csv-config.json

# Test using the "Smoke Test" tap:
tap-smoke-test --config=tap-smoke-test-config.json | target-csv

Developer Resources

• Developer TODO: As a first step, scan the entire project for the text "TODO:" and complete any recommended steps, deleting the "TODO" references once completed.

Initialize your Development Environment

pipx install poetry
poetry install

Create and Run Tests

Create tests within the target_csv/tests subfolder and then run:

poetry run pytest

You can also test the target-csv CLI interface directly using poetry run:

poetry run target-csv --help

Testing with Meltano

Note: This target will work in any Singer environment and does not require Meltano. Examples here are for convenience and to streamline end-to-end orchestration scenarios.

Your project comes with a custom meltano.yml project file already created. Open the meltano.yml and follow any "TODO" items listed in the file.

Next, install Meltano (if you haven't already) and any needed plugins:

# Install meltano
pipx install meltano
# Initialize meltano within this directory
cd target-csv
meltano install

Now you can test and orchestrate using Meltano:

# Test invocation:
meltano invoke target-csv --version
# OR run a test `elt` pipeline with the Carbon Intensity sample tap:
meltano elt tap-smoke-test target-csv
# Or with debug logging:
meltano --log-level=debug elt tap-smoke-test target-csv

SDK Dev Guide

See the dev guide for more instructions on how to use the Meltano SDK to develop your own Singer taps and targets.