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imap-backup API Documentation

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This is the developer documentation for imap-backup's code.

Usage documentation is on GitHub.

You can get an overview of the program's structure from the {file:ARCHITECTURE.md ARCHITECTURE} file.

The {file:CHANGELOG.md CHANGELOG} has a history of the changes to the program.

Design Goals

  • Secure - use a local configuration file protected by permissions
  • Restartable - calculate start point based on already downloaded messages
  • Standalone - do not rely on an email client or MTA

Repository

After cloning the repo, run the following command to get better git blame output:

git config --local blame.ignoreRevsFile .git-blame-ignore-revs

Testing

Feature Specs

Specs under specs/features are integration specs. Some of these specs run against two local IMAP servers controlled by Podman (or Docker) Compose.

Start them before running the test suite

$ podman-compose -f dev/compose.yml up -d

or, with Docker

$ docker-compose -f dev/compose.yml up -d

Then, run all specs

$ rspec

To exclude container-based tests

$ rspec --tag ~container

To run just the feature specs

rspec spec/features/**/*_spec.rb

Full Test Run

The full test run includes RSpec specs and Rubocop checks

rake

Test Debugging

The feature specs are run 'out of process' via the Aruba gem. In order to see debugging output from the process, use last_command_started.output.

Older Rubies

A Containerfile is available to allow testing with all available Ruby versions, see the README in the dev directory.

Performance Specs

PERFORMANCE=1 rspec --order=defined

Beware: the performance spec (just backup for now) takes a very long time to run, approximately 24 hours!

Access Docker imap server

require "net/imap"
require_relative "spec/features/support/30_email_server_helpers"

include EmailServerHelpers

test_connection = test_server_connection_parameters

test_imap = Net::IMAP.new(test_connection[:server], test_connection[:connection_options])
test_imap.login(test_connection[:username], test_connection[:password])

message = "From: #{test_connection[:username]}\nSubject: Some Subject\n\nHello!\n"
response = test_imap.append("INBOX", message, nil, nil)

test_imap.examine("INBOX")
uids = test_imap.uid_search(["ALL"]).sort

fetch_data_items = test_imap.uid_fetch(uids, ["BODY[]"])

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Added some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request