tests/test-convert-svn-source.t

stream-clone: avoid opening a revlog in case we do not need it

Opening an revlog has a cost, especially if it is inline as we have to scan the
file and construct an index.

To prevent the associated slowdown, we just do a minimal scan to check that an
inline file is still inline, and simply stream the file without creating a
revlog when we can.

This provides a big boost compared to the previous changeset, even if the full
generation is still penalized by the initial gathering of information.

All benchmarks are run on linux with Python 3.10.7.
# benchmark.name             = hg.exchange.stream.generate
# benchmark.variants.version = v2

### Compared to the previous changesets

We get a large win all across the board!

# mercurial-2018-08-01-zstd-sparse-revlog
before:  0.250694 seconds
after:   0.105986 seconds  (-57.72%)
# pypy-2018-08-01-zstd-sparse-revlog
before:  3.885657 seconds
after:   1.709748 seconds  (-56.00%)
# netbeans-2018-08-01-zstd-sparse-revlog
before: 16.679371 seconds
after:   7.687469 seconds  (-53.91%)
# mozilla-central-2018-08-01-zstd-sparse-revlog
before: 38.575482 seconds
after:  17.520316 seconds  (-54.58%)
# mozilla-try-2019-02-18-zstd-sparse-revlog
before: 81.160994 seconds
after:  37.073753 seconds  (-54.32%)



### Compared to 6.4.3

We are still significantly slower than 6.4.3, the extra time is usually twice
slower than the extra time we observe on the locked section, which is a quite
interesting information.

Except for mercurial-central that is much faster. That discrepancy is not really
explained yet.

# mercurial-2018-08-01-zstd-sparse-revlog
6.4.3:  0.072560 seconds
after:  0.105986 seconds  (+46.07%) (- 0.03 seconds)
# pypy-2018-08-01-zstd-sparse-revlog
6.4.3:  1.211193 seconds
after:  1.709748 seconds  (+41.16%) (-0.45 seconds)
# netbeans-2018-08-01-zstd-sparse-revlog
6.4.3:  4.932843 seconds
after:  7.687469 seconds  (+55.84%) (-2.75 seconds)
# mozilla-central-2018-08-01-zstd-sparse-revlog
6.4.3: 34.012226 seconds
after: 17.520316 seconds  (-48.49%) (-16.49 seconds)
# mozilla-try-2019-02-18-zstd-sparse-revlog
6.4.3: 23.850555 seconds
after: 37.073753 seconds  (+55.44%) (+13.22 seconds)

#require svn svn-bindings

  $ filter_svn_output () {
  >     egrep -v 'Committing|Updating|(^$)' | sed -e 's/done$//' || true
  > }

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > convert =
  > [convert]
  > svn.trunk = mytrunk
  > EOF

  $ svnadmin create svn-repo
  $ SVNREPOPATH=`pwd`/svn-repo
  $ SVNREPOURL="`"$PYTHON" $TESTDIR/svnurlof.py \"$SVNREPOPATH\"`"
  $ INVALIDREVISIONID=svn:x2147622-4a9f-4db4-a8d3-13562ff547b2/proj%20B/mytrunk@1
  $ VALIDREVISIONID=svn:a2147622-4a9f-4db4-a8d3-13562ff547b2/proj%20B/mytrunk/mytrunk@1

Now test that it works with trunk/tags layout, but no branches yet.

Initial svn import

  $ mkdir projB
  $ cd projB
  $ mkdir mytrunk
  $ mkdir tags
  $ cd ..

  $ svn import -m "init projB" projB "$SVNREPOURL/proj%20B" | filter_svn_output | sort
  Adding         projB/mytrunk
  Adding         projB/tags
  Committed revision 1.

Update svn repository

  $ svn co "$SVNREPOURL/proj%20B/mytrunk" B | filter_svn_output
  Checked out revision 1.
  $ cd B
  $ echo hello > 'letter .txt'
  $ svn add 'letter .txt' | filter_svn_output
  A         letter .txt
  $ svn ci -m hello | filter_svn_output
  Adding         letter .txt
  Transmitting file data .
  Committed revision 2.

  $ svn-safe-append.py world 'letter .txt'
  $ svn ci -m world | filter_svn_output
  Sending        letter .txt
  Transmitting file data .
  Committed revision 3.

  $ svn copy -m "tag v0.1" "$SVNREPOURL/proj%20B/mytrunk" "$SVNREPOURL/proj%20B/tags/v0.1" | filter_svn_output
  Committed revision 4.

  $ svn-safe-append.py 'nice day today!' 'letter .txt'
  $ svn ci -m "nice day" | filter_svn_output
  Sending        letter .txt
  Transmitting file data .
  Committed revision 5.
  $ cd ..

Convert to hg once and also test localtimezone option

NOTE: This doesn't check all time zones -- it merely determines that
the configuration option is taking effect.

An arbitrary (U.S.) time zone is used here.  TZ=US/Hawaii is selected
since it does not use DST (unlike other U.S. time zones) and is always
a fixed difference from UTC.

  $ TZ=US/Hawaii hg convert --config convert.localtimezone=True "$SVNREPOURL/proj%20B" B-hg
  initializing destination B-hg repository
  scanning source...
  sorting...
  converting...
  3 init projB
  2 hello
  1 world
  0 nice day
  updating tags

Update svn repository again

  $ cd B
  $ svn-safe-append.py "see second letter" 'letter .txt'
  $ echo "nice to meet you" > letter2.txt
  $ svn add letter2.txt | filter_svn_output
  A         letter2.txt
  $ svn ci -m "second letter" | filter_svn_output
  Sending        letter .txt
  Adding         letter2.txt
  Transmitting file data ..
  Committed revision 6.

  $ svn copy -m "tag v0.2" "$SVNREPOURL/proj%20B/mytrunk" "$SVNREPOURL/proj%20B/tags/v0.2" | filter_svn_output
  Committed revision 7.

  $ svn-safe-append.py "blah-blah-blah" letter2.txt
  $ svn ci -m "work in progress" | filter_svn_output
  Sending        letter2.txt
  Transmitting file data .
  Committed revision 8.
  $ cd ..

  $ hg convert -s svn "$SVNREPOURL/proj%20B/non-existent-path" dest
  initializing destination dest repository
  abort: no revision found in module /proj B/non-existent-path
  [255]

########################################

Test incremental conversion

  $ TZ=US/Hawaii hg convert --config convert.localtimezone=True "$SVNREPOURL/proj%20B" B-hg
  scanning source...
  sorting...
  converting...
  1 second letter
  0 work in progress
  updating tags

  $ cd B-hg
  $ hg log -G --template '{rev} {desc|firstline} date: {date|date} files: {files}\n'
  o  7 update tags date: * +0000 files: .hgtags (glob)
  |
  o  6 work in progress date: * -1000 files: letter2.txt (glob)
  |
  o  5 second letter date: * -1000 files: letter .txt letter2.txt (glob)
  |
  o  4 update tags date: * +0000 files: .hgtags (glob)
  |
  o  3 nice day date: * -1000 files: letter .txt (glob)
  |
  o  2 world date: * -1000 files: letter .txt (glob)
  |
  o  1 hello date: * -1000 files: letter .txt (glob)
  |
  o  0 init projB date: * -1000 files: (glob)
  
  $ hg tags -q
  tip
  v0.2
  v0.1
  $ cd ..

Test filemap
  $ echo 'include letter2.txt' > filemap
  $ hg convert --filemap filemap "$SVNREPOURL/proj%20B/mytrunk" fmap
  initializing destination fmap repository
  scanning source...
  sorting...
  converting...
  5 init projB
  4 hello
  3 world
  2 nice day
  1 second letter
  0 work in progress
  $ hg -R fmap branch -q
  default
  $ hg log -G -R fmap --template '{rev} {desc|firstline} files: {files}\n'
  o  1 work in progress files: letter2.txt
  |
  o  0 second letter files: letter2.txt
  
Convert with --full adds and removes files that didn't change

  $ cd B
  $ echo >> "letter .txt"
  $ svn ci -m 'nothing' | filter_svn_output
  Sending        letter .txt
  Transmitting file data .
  Committed revision 9.
  $ cd ..

  $ echo 'rename letter2.txt letter3.txt' > filemap
  $ hg convert --filemap filemap --full "$SVNREPOURL/proj%20B/mytrunk" fmap
  scanning source...
  sorting...
  converting...
  0 nothing
  $ hg -R fmap st --change tip
  A letter .txt
  A letter3.txt
  R letter2.txt

test invalid splicemap1

  $ cat > splicemap <<EOF
  > $INVALIDREVISIONID $VALIDREVISIONID
  > EOF
  $ hg convert --splicemap splicemap "$SVNREPOURL/proj%20B/mytrunk" smap
  initializing destination smap repository
  abort: splicemap entry svn:x2147622-4a9f-4db4-a8d3-13562ff547b2/proj%20B/mytrunk@1 is not a valid revision identifier
  [255]

Test stop revision
  $ hg convert --rev 1 "$SVNREPOURL/proj%20B/mytrunk" stoprev
  initializing destination stoprev repository
  scanning source...
  sorting...
  converting...
  0 init projB
  $ hg -R stoprev branch -q
  default

Check convert_revision extra-records.
This is also the only place testing more than one extra field in a revision.

  $ cd stoprev
  $ hg tip --debug | grep extra
  extra:       branch=default
  extra:       convert_revision=svn:........-....-....-....-............/proj B/mytrunk@1 (re)
  $ cd ..

Test converting empty heads (issue3347).
Also tests getting logs directly without debugsvnlog.

  $ svnadmin create svn-empty
  $ svnadmin load -q svn-empty < "$TESTDIR/svn/empty.svndump"
  $ hg --config convert.svn.trunk= --config convert.svn.debugsvnlog=0 convert svn-empty
  assuming destination svn-empty-hg
  initializing destination svn-empty-hg repository
  scanning source...
  sorting...
  converting...
  1 init projA
  0 adddir
  $ hg --config convert.svn.trunk= convert "$SVNREPOURL/../svn-empty/trunk"
  assuming destination trunk-hg
  initializing destination trunk-hg repository
  scanning source...
  sorting...
  converting...
  1 init projA
  0 adddir

Test that a too-new repository format is properly rejected:
  $ mv svn-empty/format format
  $ echo 999 > svn-empty/format
It's important that this command explicitly specify svn, otherwise it
can have surprising side effects (like falling back to a perforce
depot that can be seen from the test environment and slurping from that.)
  $ hg convert --source-type svn svn-empty this-will-fail
  initializing destination this-will-fail repository
  file:/*/$TESTTMP/svn-empty does not look like a Subversion repository to libsvn version 1.*.* (glob)
  abort: svn-empty: missing or unsupported repository
  [255]
  $ mv format svn-empty/format

enable svn subrepos

  $ cat >> $HGRCPATH <<EOF
  > [subrepos]
  > svn:allowed = true
  > EOF

try converting when we have an svn subrepo and a merge in hg superrepo (issue5657)

  $ cd "$TESTTMP"
  $ hg init withmerge
  $ cd withmerge
  $ echo "subrepo = [svn]$SVNREPOURL" >.hgsub
  $ hg add .hgsub
  $ svn checkout "$SVNREPOURL" subrepo | sort
  A    subrepo/proj B
  A    subrepo/proj B/mytrunk
  A    subrepo/proj B/mytrunk/letter .txt
  A    subrepo/proj B/mytrunk/letter2.txt
  A    subrepo/proj B/tags
  A    subrepo/proj B/tags/v0.1
  A    subrepo/proj B/tags/v0.1/letter .txt
  A    subrepo/proj B/tags/v0.2
  A    subrepo/proj B/tags/v0.2/letter .txt
  A    subrepo/proj B/tags/v0.2/letter2.txt
  Checked out revision 9.
  $ hg ci -m "Adding svn subrepo"
  $ touch file1.txt
  $ hg add file1.txt
  $ hg ci -m "Adding file1"
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ touch file2.txt
  $ hg add file2.txt
  $ hg ci -m "Adding file2"
  created new head
  $ hg merge 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -m "merged"
  $ cd ..
  $ hg --config extensions.convert= convert withmerge withmerge-converted
  initializing destination withmerge-converted repository
  scanning source...
  sorting...
  converting...
  3 Adding svn subrepo
  2 Adding file1
  1 Adding file2
  0 merged
  $ cd withmerge-converted
  $ hg up | sort
  4 files updated, 0 files merged, 0 files removed, 0 files unresolved
  A    subrepo/proj B
  A    subrepo/proj B/mytrunk
  A    subrepo/proj B/mytrunk/letter .txt
  A    subrepo/proj B/mytrunk/letter2.txt
  A    subrepo/proj B/tags
  A    subrepo/proj B/tags/v0.1
  A    subrepo/proj B/tags/v0.1/letter .txt
  A    subrepo/proj B/tags/v0.2
  A    subrepo/proj B/tags/v0.2/letter .txt
  A    subrepo/proj B/tags/v0.2/letter2.txt
  Checked out revision 9.
  $ ls
  file1.txt
  file2.txt
  subrepo