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transitland-lib is a library and command-line tool for reading, writing, and processing transit data in GTFS and related formats. The library is structured as a set of data sources, filters, and transformations that can be mixed together in a variety of ways to create processing pipelines. The library supports the DMFR format to describe feed resources.

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Installation

Download prebuilt binary

The transitland binaries for Linux and macOS are attached to each release.

Install using homebrew

The transitland binary can be installed using homebrew. The executable is code-signed and notarized.

brew install interline-io/transitland-lib/transitland-lib

Install binary from source

go get github.com/interline-io/transitland-lib/cmd/transitland

This package uses Go Modules and will also install required dependencies.

Main dependencies:

Usage as a CLI tool

The main subcommands are:

Breaking changes

Note: as of v0.17, we moved from Go standard library flags to Cobra's pflags; this is a breaking change in that single-dash (-flag) command flags are no longer supported, only double-dash (--flag).

Usage as a library

See library examples.

Database migrations

Migrations are supported for PostgreSQL, using the schema files in internal/schema/postgres/migrations. These files can be read and applied using golang-migrate, which will store the most recently applied migration version in schema_migrations. See the bootstrap.sh script in that directory for an example, as well as details on how to import Natural Earth data files for associating agencies with places.

SQLite database are intended to be short-lived. They can be created on an as needed basis by passing the -create flag to some commands that accept a writer. They use a single executable schema, defined in internal/schema/sqlite.sql.

Usage as a Web Service

See transitland-server documentation.

Included Readers and Writers

TargetModuleSupports ReadSupports Write
CSVtlcsv
SQLitetldb
PostgreSQL (with PostGIS)tldb

We welcome the addition of more readers and writers.

Development

transitland-lib follows Go coding conventions.

GitHub Actions runs all tests, stores code coverage reports as artifacts, and prepares releases.

Releases

Releases follow Semantic Versioning conventions.

To cut a new release:

  1. Run go generate ./... to update auto-generated documentation.
  2. Create a GitHub release. This will create a tag and GitHub Actions will create & attach code-signed binaries.
  3. Download the files from the release, and update the homebrew formula with the updated sha256 hashes and version tag.

Licenses

transitland-lib is released under a "dual license" model: