view tests/test-stream-bundle-v2.t @ 39641:aa7e312375cf

wireprotov2: let clients drive delta behavior

Previously, the "manifestdata" and "filedata" commands assumed the
receiver had all parent revisions for requested nodes. Unless the
revision had no parents, they emitted a delta instead of a fulltext.

This strategy isn't appropriate for shallow clones and for clients
that only want to access fulltext revision data for a single node
without fetching their parent revisions.

This commit adds an "haveparents" argument to the "manifestdata"
and "filedata" commands that controls delta generation behavior.

Unless "haveparents" is set, the server assumes that the client
doesn't have parent revisions unless they were previously sent
as part of the current group of revisions.

This change allows the fulltext revision data of any individual
revision to be obtained. This will facilitate shallow clones
and other data retrieval strategies that don't require all previous
revisions of an entity to be fetched.

Differential Revision: https://phab.mercurial-scm.org/D4492

#require no-reposimplestore

Test creating a consuming stream bundle v2

  $ getmainid() {
  >    hg -R main log --template '{node}\n' --rev "$1"
  > }

  $ cp $HGRCPATH $TESTTMP/hgrc.orig

  $ cat >> $HGRCPATH << EOF
  > [experimental]
  > evolution.createmarkers=True
  > evolution.exchange=True
  > bundle2-output-capture=True
  > [ui]
  > ssh="$PYTHON" "$TESTDIR/dummyssh"
  > logtemplate={rev}:{node|short} {phase} {author} {bookmarks} {desc|firstline}
  > [web]
  > push_ssl = false
  > allow_push = *
  > [phases]
  > publish=False
  > [extensions]
  > drawdag=$TESTDIR/drawdag.py
  > clonebundles=
  > EOF

The extension requires a repo (currently unused)

  $ hg init main
  $ cd main

  $ hg debugdrawdag <<'EOF'
  > E
  > |
  > D
  > |
  > C
  > |
  > B
  > |
  > A
  > EOF

  $ hg bundle -a --type="none-v2;stream=v2" bundle.hg
  $ hg debugbundle bundle.hg
  Stream params: {}
  stream2 -- {bytecount: 1693, filecount: 11, requirements: dotencode%2Cfncache%2Cgeneraldelta%2Crevlogv1%2Cstore} (mandatory: True)
  $ hg debugbundle --spec bundle.hg
  none-v2;stream=v2;requirements%3Ddotencode%2Cfncache%2Cgeneraldelta%2Crevlogv1%2Cstore

Test that we can apply the bundle as a stream clone bundle

  $ cat > .hg/clonebundles.manifest << EOF
  > http://localhost:$HGPORT1/bundle.hg BUNDLESPEC=`hg debugbundle --spec bundle.hg`
  > EOF

  $ hg serve -d -p $HGPORT --pid-file hg.pid --accesslog access.log
  $ cat hg.pid >> $DAEMON_PIDS

  $ "$PYTHON" $TESTDIR/dumbhttp.py -p $HGPORT1 --pid http.pid
  $ cat http.pid >> $DAEMON_PIDS

  $ cd ..
  $ hg clone http://localhost:$HGPORT streamv2-clone-implicit --debug
  using http://localhost:$HGPORT/
  sending capabilities command
  sending clonebundles command
  applying clone bundle from http://localhost:$HGPORT1/bundle.hg
  bundle2-input-bundle: with-transaction
  bundle2-input-part: "stream2" (params: 3 mandatory) supported
  applying stream bundle
  11 files to transfer, 1.65 KB of data
  starting 4 threads for background file closing (?)
  starting 4 threads for background file closing (?)
  adding [s] data/A.i (66 bytes)
  adding [s] data/B.i (66 bytes)
  adding [s] data/C.i (66 bytes)
  adding [s] data/D.i (66 bytes)
  adding [s] data/E.i (66 bytes)
  adding [s] 00manifest.i (584 bytes)
  adding [s] 00changelog.i (595 bytes)
  adding [s] phaseroots (43 bytes)
  adding [c] branch2-served (94 bytes)
  adding [c] rbc-names-v1 (7 bytes)
  adding [c] rbc-revs-v1 (40 bytes)
  transferred 1.65 KB in \d\.\d seconds \(.*/sec\) (re)
  bundle2-input-part: total payload size 1840
  bundle2-input-bundle: 0 parts total
  updating the branch cache
  finished applying clone bundle
  query 1; heads
  sending batch command
  searching for changes
  all remote heads known locally
  no changes found
  sending getbundle command
  bundle2-input-bundle: with-transaction
  bundle2-input-part: "listkeys" (params: 1 mandatory) supported
  bundle2-input-part: "phase-heads" supported
  bundle2-input-part: total payload size 24
  bundle2-input-bundle: 1 parts total
  checking for updated bookmarks
  updating to branch default
  resolving manifests
   branchmerge: False, force: False, partial: False
   ancestor: 000000000000, local: 000000000000+, remote: 9bc730a19041
   A: remote created -> g
  getting A
   B: remote created -> g
  getting B
   C: remote created -> g
  getting C
   D: remote created -> g
  getting D
   E: remote created -> g
  getting E
  5 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg clone --stream http://localhost:$HGPORT streamv2-clone-explicit --debug
  using http://localhost:$HGPORT/
  sending capabilities command
  sending clonebundles command
  applying clone bundle from http://localhost:$HGPORT1/bundle.hg
  bundle2-input-bundle: with-transaction
  bundle2-input-part: "stream2" (params: 3 mandatory) supported
  applying stream bundle
  11 files to transfer, 1.65 KB of data
  starting 4 threads for background file closing (?)
  starting 4 threads for background file closing (?)
  adding [s] data/A.i (66 bytes)
  adding [s] data/B.i (66 bytes)
  adding [s] data/C.i (66 bytes)
  adding [s] data/D.i (66 bytes)
  adding [s] data/E.i (66 bytes)
  adding [s] 00manifest.i (584 bytes)
  adding [s] 00changelog.i (595 bytes)
  adding [s] phaseroots (43 bytes)
  adding [c] branch2-served (94 bytes)
  adding [c] rbc-names-v1 (7 bytes)
  adding [c] rbc-revs-v1 (40 bytes)
  transferred 1.65 KB in *.* seconds (*/sec) (glob)
  bundle2-input-part: total payload size 1840
  bundle2-input-bundle: 0 parts total
  updating the branch cache
  finished applying clone bundle
  query 1; heads
  sending batch command
  searching for changes
  all remote heads known locally
  no changes found
  sending getbundle command
  bundle2-input-bundle: with-transaction
  bundle2-input-part: "listkeys" (params: 1 mandatory) supported
  bundle2-input-part: "phase-heads" supported
  bundle2-input-part: total payload size 24
  bundle2-input-bundle: 1 parts total
  checking for updated bookmarks
  updating to branch default
  resolving manifests
   branchmerge: False, force: False, partial: False
   ancestor: 000000000000, local: 000000000000+, remote: 9bc730a19041
   A: remote created -> g
  getting A
   B: remote created -> g
  getting B
   C: remote created -> g
  getting C
   D: remote created -> g
  getting D
   E: remote created -> g
  getting E
  5 files updated, 0 files merged, 0 files removed, 0 files unresolved