jcoffey-dev is traveling from Thursday 1 October through Sunday 4 October. Issues and pull requests are welcome, and will get an answer after that. Thanks for your patience.
A source that files one message in several folders -- IMAP and Maildir
copies, Gmail labels -- leaves one archive row per folder, all pointing at the
same blob. Export imported each row on its own, so the message arrived on the
target once per folder. Worse, an interrupted export matched the rest by
Message-ID alone on the next run and skipped them, so their folders were never
added.
Export now folds rows with the same blob into one email, with the union of
their folders and keywords. On a match it adds, with one batched Email/set,
any migrated folder the target copy is missing; folders that exist only on the
target are left alone. Matching is still by Message-ID (or the fallback
digest), with size deciding between several messages that share one, so two
different messages are never folded onto one target email.
The archive is unchanged: the fold happens at export, so imports, resumes and
deletions work exactly as before.
The .gitignore inherited from upstream ignores every dotfile except .github,
and every Markdown file except README and CHANGELOG. The Gitea workflows and
docs/usage.md, which the README links to, were therefore never committed.
Both are now excepted and added.
jcoffey-dev