t_cal

main branch1 version

main branchlatestOct 21, 2026

github.com/digitalcora/t-cal

Calendar of planned disruptions on MBTA rapid transit

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License: MIT

Installation

# Add this to your shard.yml
dependencies:
  t_cal:
    github: digitalcora/t-cal
    branch: main

main is a branch, not a release, so this tracks it rather than pinning a version.

Then run:

shards install

shard.yml

Crystal

~> 1.16.0

License

MIT

Author

Cora Grant

Targets

ameba from lib/ameba/bin/ameba.cr
server from src/main.cr
raven.crash_handler from lib/raven/src/crash_handler.cr

Dependencies

Runtime Dependencies

markd~> 0.6.0github: icyleaf/markd
raven*github: Sija/raven.cr, branch: master
tasker~> 3.1.0github: spider-gazelle/tasker
memory_cache~> 0.4.1github: kostya/memory_cache

Development Dependencies

ameba~> 1.7.0github: crystal-ameba/amebadev

README

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

Install Crystal using a supported method for your operating system.

The currently-used version is declared in .tool-versions, but using e.g. asdf to install it is not recommended, since it may not install the system-level packages Crystal depends on.

Development

Run the server: shards run server
Generate docs: crystal docs (then open docs/index.html)
Lint the code: shards run ameba

Production

To build a standalone binary bin/server:

shards build server --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.
LOG_TIME — If set to true, logs are prefixed with timestamps. Default value is true.
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.