view tests/test-strip-cross.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.

test stripping of filelogs where the linkrev doesn't always increase

  $ echo '[extensions]' >> $HGRCPATH
  $ echo 'strip =' >> $HGRCPATH
  $ hg init orig
  $ cd orig
  $ commit()
  > {
  >     hg up -qC null
  >     count=1
  >     for i in "$@"; do
  >         for f in $i; do
  >             echo $count > $f
  >         done
  >         count=`expr $count + 1`
  >     done
  >     hg commit -qAm "$*"
  > }

2 1 0 2 0 1 2

  $ commit '201 210'
  $ commit '102 120' '210'
  $ commit '021'
  $ commit '201' '021 120'
  $ commit '012 021' '102 201' '120 210'
  $ commit 'manifest-file'
  $ commit '102 120' '012 210' '021 201'
  $ commit '201 210' '021 120' '012 102'
  $ HGUSER=another-user; export HGUSER
  $ commit 'manifest-file'
  $ commit '012' 'manifest-file'
  $ cd ..
  $ hg clone -q -U -r -1 -r -2 -r -3 -r -4 -r -6 orig crossed
  $ cd crossed
  $ hg debugindex --manifest
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0     112  .....       0 6f105cbb914d 000000000000 000000000000 (re)
       1       112      56  .....       3 1b55917b3699 000000000000 000000000000 (re)
       2       168     123  .....       1 8f3d04e263e5 000000000000 000000000000 (re)
       3       291     122  .....       2 f0ef8726ac4f 000000000000 000000000000 (re)
       4       413      87  .....       4 0b76e38b4070 000000000000 000000000000 (re)

  $ for i in 012 021 102 120 201 210 manifest-file; do
  >     echo $i
  >     hg debugindex $i
  >     echo
  > done
  012
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0       3  .....       0 b8e02f643373 000000000000 000000000000 (re)
       1         3       3  .....       1 5d9299349fc0 000000000000 000000000000 (re)
       2         6       3  .....       2 2661d26c6496 000000000000 000000000000 (re)
  
  021
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0       3  .....       0 b8e02f643373 000000000000 000000000000 (re)
       1         3       3  .....       2 5d9299349fc0 000000000000 000000000000 (re)
       2         6       3  .....       1 2661d26c6496 000000000000 000000000000 (re)
  
  102
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0       3  .....       1 b8e02f643373 000000000000 000000000000 (re)
       1         3       3  .....       0 5d9299349fc0 000000000000 000000000000 (re)
       2         6       3  .....       2 2661d26c6496 000000000000 000000000000 (re)
  
  120
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0       3  .....       1 b8e02f643373 000000000000 000000000000 (re)
       1         3       3  .....       2 5d9299349fc0 000000000000 000000000000 (re)
       2         6       3  .....       0 2661d26c6496 000000000000 000000000000 (re)
  
  201
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0       3  .....       2 b8e02f643373 000000000000 000000000000 (re)
       1         3       3  .....       0 5d9299349fc0 000000000000 000000000000 (re)
       2         6       3  .....       1 2661d26c6496 000000000000 000000000000 (re)
  
  210
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0       3  .....       2 b8e02f643373 000000000000 000000000000 (re)
       1         3       3  .....       1 5d9299349fc0 000000000000 000000000000 (re)
       2         6       3  .....       0 2661d26c6496 000000000000 000000000000 (re)
  
  manifest-file
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0       3  .....       3 b8e02f643373 000000000000 000000000000 (re)
       1         3       3  .....       4 5d9299349fc0 000000000000 000000000000 (re)
  
  $ cd ..
  $ for i in 0 1 2 3 4; do
  >     hg clone -q -U --pull crossed $i
  >     echo "% Trying to strip revision $i"
  >     hg --cwd $i strip $i
  >     echo "% Verifying"
  >     hg --cwd $i verify
  >     echo
  > done
  % Trying to strip revision 0
  saved backup bundle to $TESTTMP/0/.hg/strip-backup/*-backup.hg (glob)
  % Verifying
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  7 files, 4 changesets, 15 total revisions
  
  % Trying to strip revision 1
  saved backup bundle to $TESTTMP/1/.hg/strip-backup/*-backup.hg (glob)
  % Verifying
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  7 files, 4 changesets, 14 total revisions
  
  % Trying to strip revision 2
  saved backup bundle to $TESTTMP/2/.hg/strip-backup/*-backup.hg (glob)
  % Verifying
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  7 files, 4 changesets, 14 total revisions
  
  % Trying to strip revision 3
  saved backup bundle to $TESTTMP/3/.hg/strip-backup/*-backup.hg (glob)
  % Verifying
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  7 files, 4 changesets, 19 total revisions
  
  % Trying to strip revision 4
  saved backup bundle to $TESTTMP/4/.hg/strip-backup/*-backup.hg (glob)
  % Verifying
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  7 files, 4 changesets, 19 total revisions