tests/test-remotefilelog-bundle2-legacy.t

revlog: have an explicit "pack_header" method

Having to pass the version header when retrieving the binary version of every
single entry is a bit silly. So we extract that special logic in its own method.
This also prepare the move to newer revlog format, not storing the header within
an actual entry…

Differential Revision: https://phab.mercurial-scm.org/D10510

#require no-windows

  $ . "$TESTDIR/remotefilelog-library.sh"

generaldelta to generaldelta interactions with bundle2 but legacy clients
without changegroup2 support
  $ cat > testcg2.py << EOF
  > import sys
  > from mercurial import changegroup, registrar, util
  > cmdtable = {}
  > command = registrar.command(cmdtable)
  > @command('testcg2', norepo=True)
  > def testcg2(ui):
  >     if not util.safehasattr(changegroup, 'cg2packer'):
  >         sys.exit(80)
  > EOF
  $ cat >> $HGRCPATH << EOF
  > [extensions]
  > testcg2 = $TESTTMP/testcg2.py
  > EOF
  $ hg testcg2 || exit 80

  $ cat > disablecg2.py << EOF
  > from mercurial import changegroup, error, util
  > deleted = False
  > def reposetup(ui, repo):
  >     global deleted
  >     if deleted:
  >         return
  >     packermap = changegroup._packermap
  >     # protect against future changes
  >     if len(packermap) != 3:
  >         raise error.Abort('packermap has %d versions, expected 3!' % len(packermap))
  >     for k in ['01', '02', '03']:
  >         if not packermap.get(k):
  >             raise error.Abort("packermap doesn't have key '%s'!" % k)
  > 
  >     del packermap['02']
  >     deleted = True
  > EOF

  $ hg init master
  $ grep generaldelta master/.hg/requires
  generaldelta
  $ cd master
preferuncompressed = False so that we can make both generaldelta and non-generaldelta clones
  $ cat >> .hg/hgrc <<EOF
  > [remotefilelog]
  > server=True
  > [experimental]
  > bundle2-exp = True
  > [server]
  > preferuncompressed = False
  > EOF
  $ echo x > x
  $ hg commit -qAm x

  $ cd ..

  $ hgcloneshallow ssh://user@dummy/master shallow -q --pull --config experimental.bundle2-exp=True
  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
  $ cd shallow
  $ cat >> .hg/hgrc << EOF
  > [extensions]
  > disablecg2 = $TESTTMP/disablecg2.py
  > EOF

  $ cd ../master
  $ echo y > y
  $ hg commit -qAm y

  $ cd ../shallow
  $ hg pull -u
  pulling from ssh://user@dummy/master
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 0 files
  new changesets d34c38483be9
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)

  $ echo a > a
  $ hg commit -qAm a
  $ hg push
  pushing to ssh://user@dummy/master
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files