Google requires OAuth for calendar access; app passwords stopped working for
CalDAV, CardDAV and IMAP in March 2025, so there is no simpler path to offer.
- Authorisation code flow over a loopback redirect, which is what Google
supports for desktop clients now the copy-paste flow is gone, with PKCE so an
intercepted code is useless without the verifier. Only the refresh token is
persisted, 0600, in the state directory.
- An expired grant is reported as itself: a consent screen still in Testing has
its refresh tokens expired after 7 days, and "run calcalist google login" is
more use than Google's bare invalid_grant.
- doctor reports whether each Google endpoint is still authorised, since an
installation that worked last week can stop with nothing having changed here.
A webcal URL may now come from a command instead of the config. Google's secret
iCal address grants read access to a whole calendar to anyone holding it, so
writing it into a file described as portable and secret-free was a contradiction.
Fixed a serious defect in the first draft of this module: random_token used
fs::read on /dev/urandom, which reads to end of file. /dev/urandom has no end,
so it allocated until the machine ran out of memory — it took the editor down
with it. It now reads exactly 32 bytes, and a randomness failure is fatal rather
than falling back to the clock, since a guessable state or PKCE verifier defeats
the point of having them.
Verified end to end against a live Posteo CalDAV calendar: pimsync validated the
generated config against the real server, 58 events from a public feed were
mirrored and pushed, and a second run was a no-op.
97 tests.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Initialise the project per the approved implementation plan (M0).
- Pin the toolchain with devbox: Rust 1.97.1, pimsync 0.5.11, jujutsu 0.44.0,
and radicale 3.7.8 for later integration tests.
- Add the configuration model with full referential validation, reporting
every problem in one pass rather than short-circuiting on the first.
- Add `calcalist doctor`, verifying pimsync's presence and version series,
the state directory, and the configuration.
- Define the whole CLI surface; only `doctor` acts, the rest exit 2 rather
than pretending to work.
- Rewrite SPECS.md: Rust naming conventions in place of the JS/TS style
lines, a `devbox run check` gate instead of a pre-commit hook (jj runs no
git hooks), and the sync semantics the spec previously left unstated.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
