Mercurial > hg
view tests/test-mq-qqueue.t @ 26755:bb0b955d050d
streamclone: support for producing and consuming stream clone bundles
Up to this point, stream clones only existed as a dynamically generated
data format produced and consumed during streaming clones. In order to
support this efficient cloning format with the clone bundles feature, we
need a more formal, on disk representation of the streaming clone data.
This patch introduces a new "bundle" type for streaming clones. Unlike
existing bundles, it does not contain changegroup data. It does,
however, share the same concepts like the 4 byte header which identifies
the type of data that follows and the 2 byte abbreviation for
compression types (of which only "UN" is currently supported).
The new bundle format is essentially the existing stream clone version 1
data format with some headers at the beginning.
Content negotiation at stream clone request time checked for repository
format/requirements compatibility before initiating a stream clone. We
can't do active content negotiation when using clone bundles. So, we put
this set of requirements inside the payload so consumers have a built-in
mechanism for checking compatibility before reading and applying lots of
data. Of course, we will also advertise this requirements set in clone
bundles. But that's for another patch.
We currently don't have a mechanism to produce and consume this new
bundle format. This will be implemented in upcoming patches.
It's worth noting that if a legacy client attempts to `hg unbundle` a
stream clone bundle (with the "HGS1" header), it will abort with:
"unknown bundle version S1," which seems appropriate.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Sat, 17 Oct 2015 11:14:52 -0700 |
parents | 4f2f0f367ef6 |
children |
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$ echo "[extensions]" >> $HGRCPATH $ echo "mq=" >> $HGRCPATH $ hg init foo $ cd foo $ echo a > a $ hg ci -qAm a Default queue: $ hg qqueue patches (active) $ echo b > a $ hg qnew -fgDU somestuff Applied patches in default queue: $ hg qap somestuff Try to change patch (create succeeds, switch fails): $ hg qqueue foo --create abort: new queue created, but cannot make active as patches are applied [255] $ hg qqueue foo patches (active) Empty default queue: $ hg qpop popping somestuff patch queue now empty Switch queue: $ hg qqueue foo $ hg qqueue foo (active) patches List queues, quiet: $ hg qqueue --quiet foo patches Fail creating queue with already existing name: $ hg qqueue --create foo abort: queue "foo" already exists [255] $ hg qqueue foo (active) patches Create new queue for rename: $ hg qqueue --create bar $ hg qqueue bar (active) foo patches Rename queue, same name: $ hg qqueue --rename bar abort: can't rename "bar" to its current name [255] Rename queue to existing: $ hg qqueue --rename foo abort: queue "foo" already exists [255] Rename queue: $ hg qqueue --rename buz $ hg qqueue buz (active) foo patches Switch back to previous queue: $ hg qqueue foo $ hg qqueue --delete buz $ hg qqueue foo (active) patches Create queue for purge: $ hg qqueue --create purge-me $ hg qqueue foo patches purge-me (active) Create patch for purge: $ hg qnew patch-purge-me $ ls -1d .hg/patches-purge-me 2>/dev/null || true .hg/patches-purge-me $ hg qpop -a popping patch-purge-me patch queue now empty Purge queue: $ hg qqueue foo $ hg qqueue --purge purge-me $ hg qqueue foo (active) patches $ ls -1d .hg/patches-purge-me 2>/dev/null || true Unapplied patches: $ hg qun $ echo c > a $ hg qnew -fgDU otherstuff Fail switching back: $ hg qqueue patches abort: new queue created, but cannot make active as patches are applied [255] Fail deleting current: $ hg qqueue foo --delete abort: cannot delete currently active queue [255] Switch back and delete foo: $ hg qpop -a popping otherstuff patch queue now empty $ hg qqueue patches $ hg qqueue foo --delete $ hg qqueue patches (active) Tricky cases: $ hg qqueue store --create $ hg qnew journal $ hg qqueue patches store (active) $ hg qpop -a popping journal patch queue now empty $ hg qqueue patches $ hg qun somestuff Invalid names: $ hg qqueue test/../../bar --create abort: invalid queue name, may not contain the characters ":\/." [255] $ hg qqueue . --create abort: invalid queue name, may not contain the characters ":\/." [255] $ cd ..