TCal

A calendar of planned service disruptions on MBTA rapid transit, provided as a web page and an iCal feed. See the live site at: https://tcal.digitalcora.net

Setup

1. Install Crystal
2. shards install

asdf install may also be used, but is not recommended, since this doesn't install any of the system-level packages Crystal depends on.

Development

• Run the server: crystal src/main.cr
• Generate docs: crystal docs (then open docs/index.html)
• Lint the code: bin/ameba

Production

To build a standalone binary bin/server:

• shards build --production --release --static

The current production instance runs on Fly, using the fly.toml included in the repo.

Configuration

The server supports these environment variables:

• HOST — The network address to listen on. Default value is 127.0.0.1, meaning the server will only be accessible from localhost. Use 0.0.0.0 to listen on all addresses.

• PORT — The TCP port to listen on. Default value is 8080.

• ORIGIN — The canonical origin (scheme + host + optional port) of the site. When a request includes a Host and it is not the canonical origin's host, it will be redirected to the same path at the canonical origin. Default value is http://localhost plus the configured PORT.

• LOG_LEVEL — The log level. Default value is info. See the Log documentation for valid log levels.

• SENTRY_DSN — If set, unhandled exceptions will be reported to Sentry.

• SENTRY_ENVIRONMENT — The environment string used for Sentry reports, if enabled. Default value is default.