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Change Log

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

1.1.0 - 2021-11-11

Added

  • robots.txt and sitemap.xml (and the ability to serve TXT and XML files)

Fixed

  • Be more defensive against malformed requests

Changed

  • Slightly changed explanatory web text and refreshed its appearance
  • All text files now go through ZEITGITTER_* substitution

1.0.6 - 2021-11-04

Added

Fixed

Changed

  • Upgraded docker image to debian:bullseye-slim

1.0.5 - 2021-03-06

Added

  • Include an optional TLS termination proxy as part of the docker-compose setup (requires setting ZEITGITTER_DOMAIN in addition to ZEITGITTER_OWN_URL in server.env)

Fixed

  • Fixed Dockerfile for ARM64

Changed

  • Shrank docker image
  • No changes to source or PyPI versions (except the version number); only Docker image is affected by the modifications leading up to v1.0.5

1.0.4 - 2021-03-05

Added

  • --upstream-sleep allows to sleep between upstream timestamps, e.g. to ensure a consistent ordering of cross-timestamping events for each commit.
  • Time intervals (such as "5m3.5s") may skip the seconds indication, s. So --upstream-sleep=0 is also valid.

Fixed

Changed

  • Version numbers of non-tagged versions now end in .postX, where X is the number of commits since the tag (unless overridden by FORCE_VERSION environment variable).
  • Docker image slightly smaller

1.0.3 - 2020-12-07

Added

  • More documentation: (especially in doc/Docker.md).
    • Setup and retirement of a timestamping server
    • Document choice/change of PGP key ID (and name)
  • On restart, tries to resume waiting for a mail response from PGP Digital Timestamping Service (was added some versions ago, but never documented)
  • New tools/zeitgitter-repo-health.sh allows to probe whether the repo has seen the expected updates. Optionally, skip fetches or test for specific files to have been modified and return a specific exit code. This is independent from the Docker health checks and can be run on a monitoring machine.
  • Timespans may also indicate the number of weeks now (e.g., "1w 2d 8h 40m 3.5s")
  • Simplified using multiple cross-timestampers:
    • Add support to push all branches using --push_branch=*, saving the need to list/update them all (see also Changes below)
    • --upstream-timestamp no longer needs a branch name, if git timestamp will determine it correctly. This leads to much shorter and more maintainable lists of cross-timestamping servers (e.g., gitta diversity some.other.server).

Fixed

  • Code typo on failed key creation
  • Docker health check failed due to missing wget package
  • Docker health check now supports multiple cross-timestamping targets
  • Tests test against new commit string (and, therefore, signatures) now

Changed

  • Docker image is now based on debian:buster-slim. As the same number of packages (171) has to be added on top of it, starting with the smaller image is preferable. (See [#0.9.6---2020-08-13](v0.9.6 below) for why not using one of the python base images.)
  • Default for --push-branch is now *, meaning --all (which cannot be expressed in the config file)
  • ZEITGITTER_FAKE_TIME (needed only for tests) is removed from the environment of git timestamp clients that connect to cross-timestamping servers specified as server name only (as opposed to branch=server tuples) to allow both testing against our local timeserver (which does not use wall clock to achieve reproducible signatures) and against real-world timeservers obeying wall clock.

1.0.2 - 2020-08-15

Added

  • Allow testing docker images without having to publish to PyPI and DockerHub. This will allow better testing in the future before releasing. (If you wonder why this Changelog does not say anything about v1.0.1, this is why.)

Fixed

  • Data loss can occur (and did in fact occur on gitta.zeitgitter.net) if git is not installed, due to FileNotFoundError signalling both harmless events (whether a file tested for presence exists) and important events (git cannot be executed, as it cannot be found). This resulted in destructive file operations being performed, as it was wrongly believed that the data was already recorded persistently in git. This has been fixed. ⚠️ Please refrain from using Docker image versions 1.0.0 or 0.9.6, and do update to 1.0.1 also for non-Docker instances, as they will fail more harmlessly (i.e., just lengthen the interval until git is present (again), resulting in precision loss from cross-timestamping, instead of with data loss).
  • git included in Docker image
  • Recovering from dangling repositories

Changed

  • A commit will be created after creating the timestamping repository and adding pubkey.asc to it, so that cross-timestamping can start then. Otherwise, cross-timestamping would result in error messages until the first external timestamping request arrives.

1.0.0 - 2020-08-13

Added

Fixed

Changed

  • Releasing 0.9.6 as 1.0.0

0.9.6 - 2020-08-13

Added

Fixed

Changed

0.9.5 - 2020-05-13

Added

  • README for the Docker file
  • Support for ARM and ARM64 docker images
  • Documented support for multiple debug classes

Fixed

  • Web files again included in wheel
  • async_email_timestamp() now really waits in a new thread for the mail reply

Changed

  • Reduced logging for PGP Timestamping Server mail handling
  • Updated gnupg config documentation
  • Newer GnuPG versions seem to ignore the symlink trick, now copying for real
  • Restarting the server tries to resume a pending async_email_timestamp() waiting for the reply mail

0.9.4 - 2020-05-09

Added

  • Support for data in binary packages

Fixed

Changed

  • Default port is now 15177 (as has been for systemd); tests use 15178
  • Default debug level is now INFO. Numeric debug levels are now deprecated.
  • Default commit interval has been set to 1h
  • Simplified Docker setup/usage. Now created from pypi images.
  • Docker is now the recommended usage platform.

0.9.3 - 2020-05-08

Added

  • Allow dots in tag names, as long as they are not next to each other (i.e., .. is not allowed)
  • Added support for PGP Digital Timestamping Service and improved documentation
  • Timestamp our commit id as well with PGP Timestamper
  • Configuration now easier: Just look for EASYCONFIG in zeitgitter.conf
  • Added support for (semi-)automatic configuration
  • Configuration through environment variables
  • Support Docker
  • More detailed debug support (see --debug-level)
  • Minimal support for HTTP HEAD requests
  • Can use IMAP servers without IDLE support (are there still any out there?)
  • Work around a bug in some(?) Dovecot mail servers which cannot match the last character of a mail domain. I.e., [email protected] does not match the From: Stamper <[email protected]> header in IMAP SEARCH, but [email protected] (note the missing k!) does match the header. This can be turned off via --no-dovecot-bug-workaround.

Fixed

  • Correctly handles IMAP IDLE responses other than EXISTS (especially Dovecot's * OK still here)
  • End line in stamper mails may now also be in last line.
  • Not receiving a stamper mail in time does no longer raise an exception

Changed

  • Split into client (git-timestamp) and server (zeitgitterd).
  • Calculate a default for --gnupg-home to allow --number-of-gpg-agents > 1
  • Commit log message includes timestamp as well to improve readability for git blame etc.
  • Log message timestamps (including "Found uncommitted data") now say "UTC"
  • Renamed all PGP Digital Timestamper related parameters to a common --stamper- prefix (the old names are still accepted, but deprecated)
  • Mail tests now include a (local) configuration file for the site secrets.
  • Maintainer affiliation
  • Release on PyPI

0.9.2 - 2019-05-10

Added

  • make apt installs dependencies on systems supporting apt

Client

  • Distributable via PyPI
  • Added Python 2.x compatibility; tested with 2.7
  • Automatically derive default timestamp branch name from servername (first component not named 'igitt') followd by '-timestamps'.
  • Better error message when wrong gnupg module has been installed

Fixed

Client

  • Fetch GnuPG key again if missing from keyring. This fixes unexpected behavior when running as sudo vs. natively as root.
  • Work around a bug in older GnuPG installs (create pubring.kbx if it does not yet exist before attempting scan_keys()).

Changed

  • Higher-level README

Client

  • Is now implemented as a package (make install still installs a flat file though, for simplicity)

0.9.1 - 2019-04-19

Added

Client

  • --server can be set in git config
  • Prevent actual duplicate entries created by git timestamp --branch
  • Documented that git timestamp --help does not work and to use -h, as --help is swallowed by git and not forwarded to git-timestamp.
  • Client system tests (require Internet connectivity)

Server

  • Ability to run multiple GnuPG processes (including gpg-agents) in parallel
  • Handle missing --push-repository (again)

Fixed

  • Made tests compatible with older GnuPG versions

Changed

Client

  • Made some error messages more consistent
  • --tag overrides --branch. This allows to store a default branch in git config, yet timestamp a tag when necessary.

0.9.0 - 2019-04-04

Initial public release