tap-github

tap-github is a Singer tap for GitHub.

Build with the Singer SDK.

Installation

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

Or better yet, please pin to a release version for a stable experience:

pipx install git+https://github.com/MeltanoLabs/tap-github.git@vX.Y.Z

A list of release versions is available at https://github.com/MeltanoLabs/tap-github/releases

Configuration

Accepted Config Options

This tap accepts the following configuration options:

• Required: One and only one of the following modes:
  1. repositories: An array of strings specifying the GitHub repositories to be included. Each element of the array should be of the form <org>/<repository>, e.g. MeltanoLabs/tap-github.
  2. organizations: An array of strings containing the github organizations to be included
  3. searches: An array of search descriptor objects with the following properties:
     • name: A human readable name for the search query
     • query: A github search string (generally the same as would come after ?q= in the URL)
  4. user_usernames: A list of github usernames
  5. user_ids: A list of github user ids [int]
• Highly recommended:
  • Personal access tokens (PATs) for authentication can be provided in 3 ways:
    • auth_token - Takes a single token.
    • additional_auth_tokens - Takes a list of tokens. Can be used together with auth_token or as the sole source of PATs.
    • Any environment variables beginning with GITHUB_TOKEN will be assumed to be PATs. These tokens will be used in addition to auth_token (if provided), but will not be used if additional_auth_tokens is provided.
  • GitHub App keys are another option for authentication, and can be used in combination with PATs if desired. App IDs and keys should be assembled into the format :app_id:;;-----BEGIN RSA PRIVATE KEY-----\n_YOUR_P_KEY_\n-----END RSA PRIVATE KEY----- where the key can be generated from the Private keys section on https://github.com/organizations/:organization_name/settings/apps/:app_name. Read more about GitHub App quotas here. Formatted app keys can be provided in 2 ways:
    • auth_app_keys - List of GitHub App keys in the prescribed format.
    • If auth_app_keys is not provided but there is an environment variable with the name GITHUB_APP_PRIVATE_KEY, it will be assumed to be an App key in the prescribed format.
• Optional:
  • user_agent
  • start_date
  • metrics_log_level
  • stream_maps
  • stream_maps_config
  • stream_options: Options which can change the behaviour of a specific stream are nested within.
    • milestones: Valid options for the milestones stream are nested within.
      • state: Determines which milestones will be extracted. One of open (default), closed, all.
  • rate_limit_buffer: A buffer to avoid consuming all query points for the auth_token at hand. Defaults to 1000.
  • expiry_time_buffer: A buffer used when determining when to refresh GitHub app tokens. Only relevant when authenticating as a GitHub app. Defaults to 10 minutes. Tokens generated by GitHub apps expire 1 hour after creation, and will be refreshed once fewer than expiry_time_buffer minutes remain until the anticipated expiry time.

Note that modes 1-3 are repository modes and 4-5 are user modes and will not run the same set of streams.

A full list of supported settings and capabilities for this tap is available by running:

tap-github --about

Source Authentication and Authorization

A small number of records may be pulled without an auth token. However, a Github auth token should generally be considered "required" since it gives more realistic rate limits. (See GitHub API docs for more info.)

Usage

API Limitation - Pagination

The GitHub API is limited for some resources such as /events. For some resources, users might encounter the following error:

In order to keep the API fast for everyone, pagination is limited for this resource. Check the rel=last link relation in the Link response header to see how far back you can traverse.

To avoid this, the GitHub streams will exit early. I.e. when there are no more next page available. If you are fecthing /events at the repository level, beware of letting the tap disabled for longer than a few days or you will have gaps in your data.

You can easily run tap-github by itself or in a pipeline using Meltano.

Notes regarding permissions

• For the traffic_* streams, you will need write access to the repository. You can enable extraction for these streams by selecting them in the catalog.

Executing the Tap Directly

tap-github --version
tap-github --help
tap-github --config CONFIG --discover > ./catalog.json

Contributing

This project uses parent-child streams. Learn more about them here.

Initialize your Development Environment

pipx install poetry
poetry install

Create and Run Tests

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

poetry run pytest

You can also test the tap-github CLI interface directly using poetry run:

poetry run tap-github --help

Testing with Meltano

Note: This tap 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 tap-github
meltano install

Now you can test and orchestrate using Meltano:

# Test invocation:
meltano invoke tap-github --version
# OR run a test `elt` pipeline:
meltano elt tap-github target-jsonl

One-liner to recreate output directory, run elt, and write out state file:

# Update this when you want a fresh state file:
TESTJOB=testjob1

# Run everything in one line
mkdir -p .output && meltano elt tap-github target-jsonl --job_id $TESTJOB && meltano elt tap-github target-jsonl --job_id $TESTJOB --dump=state > .output/state.json

Singer SDK Dev Guide

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