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tests/test-contrib-dumprevlog.t
author Paul Morelle <paul.morelle@octobus.net>
Thu, 21 Jun 2018 18:19:57 +0200
changeset 38646 93313f66b69b
parent 37407 567bddcb4271
child 39489 f1186c292d03
permissions -rw-r--r--
debugdeltachain: avoid division by zero when a chain is empty The two ratios chainratio and extraratio are computed using dividers that may be zero when the file is empty. As the denominators are integers, the limit of the ratio "just before zero" is the numerator value itself. If the numerator itself is zero, the ratio value is still meaningful: in both cases, a "good" value is a low ratio, and a size of zero is the optimal case.

#require reporevlogstore

  $ CONTRIBDIR="$TESTDIR/../contrib"

  $ hg init repo-a
  $ cd repo-a

  $ echo this is file a > a
  $ hg add a
  $ hg commit -m first

  $ echo adding to file a >> a
  $ hg commit -m second

  $ echo adding more to file a >> a
  $ hg commit -m third
  $ hg verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  1 files, 3 changesets, 3 total revisions

Dumping revlog of file a to stdout:
  $ $PYTHON "$CONTRIBDIR/dumprevlog" .hg/store/data/a.i
  file: .hg/store/data/a.i
  node: 183d2312b35066fb6b3b449b84efc370d50993d0
  linkrev: 0
  parents: 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000
  length: 15
  -start-
  this is file a
  
  -end-
  node: b1047953b6e6b633c0d8197eaa5116fbdfd3095b
  linkrev: 1
  parents: 183d2312b35066fb6b3b449b84efc370d50993d0 0000000000000000000000000000000000000000
  length: 32
  -start-
  this is file a
  adding to file a
  
  -end-
  node: 8c4fd1f7129b8cdec6c7f58bf48fb5237a4030c1
  linkrev: 2
  parents: b1047953b6e6b633c0d8197eaa5116fbdfd3095b 0000000000000000000000000000000000000000
  length: 54
  -start-
  this is file a
  adding to file a
  adding more to file a
  
  -end-

Dump all revlogs to file repo.dump:

  $ find .hg/store -name "*.i" | sort | xargs $PYTHON "$CONTRIBDIR/dumprevlog" > ../repo.dump
  $ cd ..

Undumping into repo-b:

  $ hg init repo-b
  $ cd repo-b
  $ $PYTHON "$CONTRIBDIR/undumprevlog" < ../repo.dump
  .hg/store/00changelog.i
  .hg/store/00manifest.i
  .hg/store/data/a.i
  $ cd ..

Rebuild fncache with clone --pull:

  $ hg clone --pull -U repo-b repo-c
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 3 changes to 1 files
  new changesets de1da620e7d8:46946d278c50

Verify:

  $ hg -R repo-c verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  1 files, 3 changesets, 3 total revisions

Compare repos:

  $ hg -R repo-c incoming repo-a
  comparing with repo-a
  searching for changes
  no changes found
  [1]

  $ hg -R repo-a incoming repo-c
  comparing with repo-c
  searching for changes
  no changes found
  [1]
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