view tests/test-persistent-nodemap.t @ 44985:1ca0047fd7e1

absorb: preserve changesets which were already empty

Most commands in Mercurial (commit, rebase, absorb itself) don’t create empty
changesets or drop them if they become empty. If there’s a changeset that’s
empty, it must be a deliberate choice of the user. At least it shouldn’t be
absorb’s responsibility to prune them. The fact that changesets that became
empty during absorb are pruned, is unaffected by this.

This case was found while writing patches which make it possible to configure
absorb and rebase to not drop empty changesets. Even without having such config
set, I think it’s valuable to preserve changesets which were already empty.

===================================
Test the persistent on-disk nodemap
===================================

  $ cat << EOF >> $HGRCPATH
  > [format]
  > use-persistent-nodemap=yes
  > [devel]
  > persistent-nodemap=yes
  > EOF
  $ hg init test-repo
  $ cd test-repo
  $ hg debugformat
  format-variant     repo
  fncache:            yes
  dotencode:          yes
  generaldelta:       yes
  sparserevlog:       yes
  sidedata:            no
  persistent-nodemap: yes
  copies-sdc:          no
  plain-cl-delta:     yes
  compression:        zlib
  compression-level:  default
  $ hg debugbuilddag .+5000 --new-file --config "storage.revlog.nodemap.mode=warn"
  persistent nodemap in strict mode without efficient method (no-rust no-pure !)
  persistent nodemap in strict mode without efficient method (no-rust no-pure !)
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5000
  tip-node: 6b02b8c7b96654c25e86ba69eda198d7e6ad8b3c
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%
  $ f --size .hg/store/00changelog.n
  .hg/store/00changelog.n: size=70

Simple lookup works

  $ ANYNODE=`hg log --template '{node|short}\n' --rev tip`
  $ hg log -r "$ANYNODE" --template '{rev}\n'
  5000


#if rust

  $ f --sha256 .hg/store/00changelog-*.nd
  .hg/store/00changelog-????????????????.nd: sha256=2e029d3200bd1a986b32784fc2ef1a3bd60dc331f025718bcf5ff44d93f026fd (glob)

  $ f --sha256 .hg/store/00manifest-*.nd
  .hg/store/00manifest-????????????????.nd: sha256=97117b1c064ea2f86664a124589e47db0e254e8d34739b5c5cc5bf31c9da2b51 (glob)
  $ hg debugnodemap --dump-new | f --sha256 --size
  size=121088, sha256=2e029d3200bd1a986b32784fc2ef1a3bd60dc331f025718bcf5ff44d93f026fd
  $ hg debugnodemap --dump-disk | f --sha256 --bytes=256 --hexdump --size
  size=121088, sha256=2e029d3200bd1a986b32784fc2ef1a3bd60dc331f025718bcf5ff44d93f026fd
  0000: 00 00 00 91 00 00 00 20 00 00 00 bb 00 00 00 e7 |....... ........|
  0010: 00 00 00 66 00 00 00 a1 00 00 01 13 00 00 01 22 |...f..........."|
  0020: 00 00 00 23 00 00 00 fc 00 00 00 ba 00 00 00 5e |...#...........^|
  0030: 00 00 00 df 00 00 01 4e 00 00 01 65 00 00 00 ab |.......N...e....|
  0040: 00 00 00 a9 00 00 00 95 00 00 00 73 00 00 00 38 |...........s...8|
  0050: 00 00 00 cc 00 00 00 92 00 00 00 90 00 00 00 69 |...............i|
  0060: 00 00 00 ec 00 00 00 8d 00 00 01 4f 00 00 00 12 |...........O....|
  0070: 00 00 02 0c 00 00 00 77 00 00 00 9c 00 00 00 8f |.......w........|
  0080: 00 00 00 d5 00 00 00 6b 00 00 00 48 00 00 00 b3 |.......k...H....|
  0090: 00 00 00 e5 00 00 00 b5 00 00 00 8e 00 00 00 ad |................|
  00a0: 00 00 00 7b 00 00 00 7c 00 00 00 0b 00 00 00 2b |...{...|.......+|
  00b0: 00 00 00 c6 00 00 00 1e 00 00 01 08 00 00 00 11 |................|
  00c0: 00 00 01 30 00 00 00 26 00 00 01 9c 00 00 00 35 |...0...&.......5|
  00d0: 00 00 00 b8 00 00 01 31 00 00 00 2c 00 00 00 55 |.......1...,...U|
  00e0: 00 00 00 8a 00 00 00 9a 00 00 00 0c 00 00 01 1e |................|
  00f0: 00 00 00 a4 00 00 00 83 00 00 00 c9 00 00 00 8c |................|


#else

  $ f --sha256 .hg/store/00changelog-*.nd
  .hg/store/00changelog-????????????????.nd: sha256=f544f5462ff46097432caf6d764091f6d8c46d6121be315ead8576d548c9dd79 (glob)
  $ hg debugnodemap --dump-new | f --sha256 --size
  size=121088, sha256=f544f5462ff46097432caf6d764091f6d8c46d6121be315ead8576d548c9dd79
  $ hg debugnodemap --dump-disk | f --sha256 --bytes=256 --hexdump --size
  size=121088, sha256=f544f5462ff46097432caf6d764091f6d8c46d6121be315ead8576d548c9dd79
  0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0010: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0020: ff ff ff ff ff ff f5 06 ff ff ff ff ff ff f3 e7 |................|
  0030: ff ff ef ca ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0040: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0050: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ed 08 |................|
  0060: ff ff ed 66 ff ff ff ff ff ff ff ff ff ff ff ff |...f............|
  0070: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  0090: ff ff ff ff ff ff ff ff ff ff ff ff ff ff f6 ed |................|
  00a0: ff ff ff ff ff ff fe 61 ff ff ff ff ff ff ff ff |.......a........|
  00b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  00c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  00d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
  00e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff f1 02 |................|
  00f0: ff ff ff ff ff ff ed 1b ff ff ff ff ff ff ff ff |................|

#endif

  $ hg debugnodemap --check
  revision in index:   5001
  revision in nodemap: 5001

add a new commit

  $ hg up
  5001 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo foo > foo
  $ hg add foo

#if no-pure no-rust

  $ hg ci -m 'foo' --config "storage.revlog.nodemap.mode=strict"
  transaction abort!
  rollback completed
  abort: persistent nodemap in strict mode without efficient method
  [255]

#endif

  $ hg ci -m 'foo'

#if no-pure no-rust
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5001
  tip-node: 16395c3cf7e231394735e6b1717823ada303fb0c
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%
#else
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5001
  tip-node: 16395c3cf7e231394735e6b1717823ada303fb0c
  data-length: 121344
  data-unused: 256
  data-unused: 0.211%
#endif

  $ f --size .hg/store/00changelog.n
  .hg/store/00changelog.n: size=70

(The pure code use the debug code that perform incremental update, the C code reencode from scratch)

#if pure
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=121344, sha256=cce54c5da5bde3ad72a4938673ed4064c86231b9c64376b082b163fdb20f8f66 (glob)
#endif

#if rust
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=121344, sha256=952b042fcf614ceb37b542b1b723e04f18f83efe99bee4e0f5ccd232ef470e58 (glob)
#endif

#if no-pure no-rust
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=121088, sha256=df7c06a035b96cb28c7287d349d603baef43240be7736fe34eea419a49702e17 (glob)
#endif

  $ hg debugnodemap --check
  revision in index:   5002
  revision in nodemap: 5002

Test code path without mmap
---------------------------

  $ echo bar > bar
  $ hg add bar
  $ hg ci -m 'bar' --config storage.revlog.nodemap.mmap=no

  $ hg debugnodemap --check --config storage.revlog.nodemap.mmap=yes
  revision in index:   5003
  revision in nodemap: 5003
  $ hg debugnodemap --check --config storage.revlog.nodemap.mmap=no
  revision in index:   5003
  revision in nodemap: 5003


#if pure
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
  data-length: 121600
  data-unused: 512
  data-unused: 0.421%
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=121600, sha256=def52503d049ccb823974af313a98a935319ba61f40f3aa06a8be4d35c215054 (glob)
#endif
#if rust
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
  data-length: 121600
  data-unused: 512
  data-unused: 0.421%
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=121600, sha256=dacf5b5f1d4585fee7527d0e67cad5b1ba0930e6a0928f650f779aefb04ce3fb (glob)
#endif
#if no-pure no-rust
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%
  $ f --sha256 .hg/store/00changelog-*.nd --size
  .hg/store/00changelog-????????????????.nd: size=121088, sha256=59fcede3e3cc587755916ceed29e3c33748cd1aa7d2f91828ac83e7979d935e8 (glob)
#endif

Test force warming the cache

  $ rm .hg/store/00changelog.n
  $ hg debugnodemap --metadata
  $ hg debugupdatecache
#if pure
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%
#else
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%
#endif

Check out of sync nodemap
=========================

First copy old data on the side.

  $ mkdir ../tmp-copies
  $ cp .hg/store/00changelog-????????????????.nd .hg/store/00changelog.n ../tmp-copies

Nodemap lagging behind
----------------------

make a new commit

  $ echo bar2 > bar
  $ hg ci -m 'bar2'
  $ NODE=`hg log -r tip -T '{node}\n'`
  $ hg log -r "$NODE" -T '{rev}\n'
  5003

If the nodemap is lagging behind, it can catch up fine

  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5003
  tip-node: c9329770f979ade2d16912267c38ba5f82fd37b3
  data-length: 121344 (pure !)
  data-length: 121344 (rust !)
  data-length: 121152 (no-rust no-pure !)
  data-unused: 192 (pure !)
  data-unused: 192 (rust !)
  data-unused: 0 (no-rust no-pure !)
  data-unused: 0.158% (pure !)
  data-unused: 0.158% (rust !)
  data-unused: 0.000% (no-rust no-pure !)
  $ cp -f ../tmp-copies/* .hg/store/
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%
  $ hg log -r "$NODE" -T '{rev}\n'
  5003

changelog altered
-----------------

If the nodemap is not gated behind a requirements, an unaware client can alter
the repository so the revlog used to generate the nodemap is not longer
compatible with the persistent nodemap. We need to detect that.

  $ hg up "$NODE~5"
  0 files updated, 0 files merged, 4 files removed, 0 files unresolved
  $ echo bar > babar
  $ hg add babar
  $ hg ci -m 'babar'
  created new head
  $ OTHERNODE=`hg log -r tip -T '{node}\n'`
  $ hg log -r "$OTHERNODE" -T '{rev}\n'
  5004

  $ hg --config extensions.strip= strip --rev "$NODE~1" --no-backup

the nodemap should detect the changelog have been tampered with and recover.

  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  tip-node: b355ef8adce0949b8bdf6afc72ca853740d65944
  data-length: 121536 (pure !)
  data-length: 121088 (rust !)
  data-length: 121088 (no-pure no-rust !)
  data-unused: 448 (pure !)
  data-unused: 0 (rust !)
  data-unused: 0 (no-pure no-rust !)
  data-unused: 0.000% (rust !)
  data-unused: 0.369% (pure !)
  data-unused: 0.000% (no-pure no-rust !)

  $ cp -f ../tmp-copies/* .hg/store/
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5002
  tip-node: 880b18d239dfa9f632413a2071bfdbcc4806a4fd
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%
  $ hg log -r "$OTHERNODE" -T '{rev}\n'
  5002

Check transaction related property
==================================

An up to date nodemap should be available to shell hooks,

  $ echo dsljfl > a
  $ hg add a
  $ hg ci -m a
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5003
  tip-node: a52c5079765b5865d97b993b303a18740113bbb2
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%
  $ echo babar2 > babar
  $ hg ci -m 'babar2' --config "hooks.pretxnclose.nodemap-test=hg debugnodemap --metadata"
  uid: ???????????????? (glob)
  tip-rev: 5004
  tip-node: 2f5fb1c06a16834c5679d672e90da7c5f3b1a984
  data-length: 121280 (pure !)
  data-length: 121280 (rust !)
  data-length: 121088 (no-pure no-rust !)
  data-unused: 192 (pure !)
  data-unused: 192 (rust !)
  data-unused: 0 (no-pure no-rust !)
  data-unused: 0.158% (pure !)
  data-unused: 0.158% (rust !)
  data-unused: 0.000% (no-pure no-rust !)
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5004
  tip-node: 2f5fb1c06a16834c5679d672e90da7c5f3b1a984
  data-length: 121280 (pure !)
  data-length: 121280 (rust !)
  data-length: 121088 (no-pure no-rust !)
  data-unused: 192 (pure !)
  data-unused: 192 (rust !)
  data-unused: 0 (no-pure no-rust !)
  data-unused: 0.158% (pure !)
  data-unused: 0.158% (rust !)
  data-unused: 0.000% (no-pure no-rust !)

Another process does not see the pending nodemap content during run.

  $ PATH=$RUNTESTDIR/testlib/:$PATH
  $ echo qpoasp > a
  $ hg ci -m a2 \
  > --config "hooks.pretxnclose=wait-on-file 20 sync-repo-read sync-txn-pending" \
  > --config "hooks.txnclose=touch sync-txn-close" > output.txt 2>&1 &

(read the repository while the commit transaction is pending)

  $ wait-on-file 20 sync-txn-pending && \
  > hg debugnodemap --metadata && \
  > wait-on-file 20 sync-txn-close sync-repo-read
  uid: ???????????????? (glob)
  tip-rev: 5004
  tip-node: 2f5fb1c06a16834c5679d672e90da7c5f3b1a984
  data-length: 121280 (pure !)
  data-length: 121280 (rust !)
  data-length: 121088 (no-pure no-rust !)
  data-unused: 192 (pure !)
  data-unused: 192 (rust !)
  data-unused: 0 (no-pure no-rust !)
  data-unused: 0.158% (pure !)
  data-unused: 0.158% (rust !)
  data-unused: 0.000% (no-pure no-rust !)
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5005
  tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
  data-length: 121536 (pure !)
  data-length: 121536 (rust !)
  data-length: 121088 (no-pure no-rust !)
  data-unused: 448 (pure !)
  data-unused: 448 (rust !)
  data-unused: 0 (no-pure no-rust !)
  data-unused: 0.369% (pure !)
  data-unused: 0.369% (rust !)
  data-unused: 0.000% (no-pure no-rust !)

  $ cat output.txt

Check that a failing transaction will properly revert the data

  $ echo plakfe > a
  $ f --size --sha256 .hg/store/00changelog-*.nd
  .hg/store/00changelog-????????????????.nd: size=121536, sha256=bb414468d225cf52d69132e1237afba34d4346ee2eb81b505027e6197b107f03 (glob) (pure !)
  .hg/store/00changelog-????????????????.nd: size=121536, sha256=909ac727bc4d1c0fda5f7bff3c620c98bd4a2967c143405a1503439e33b377da (glob) (rust !)
  .hg/store/00changelog-????????????????.nd: size=121088, sha256=342d36d30d86dde67d3cb6c002606c4a75bcad665595d941493845066d9c8ee0 (glob) (no-pure no-rust !)
  $ hg ci -m a3 --config "extensions.abort=$RUNTESTDIR/testlib/crash_transaction_late.py"
  transaction abort!
  rollback completed
  abort: This is a late abort
  [255]
  $ hg debugnodemap --metadata
  uid: ???????????????? (glob)
  tip-rev: 5005
  tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
  data-length: 121536 (pure !)
  data-length: 121536 (rust !)
  data-length: 121088 (no-pure no-rust !)
  data-unused: 448 (pure !)
  data-unused: 448 (rust !)
  data-unused: 0 (no-pure no-rust !)
  data-unused: 0.369% (pure !)
  data-unused: 0.369% (rust !)
  data-unused: 0.000% (no-pure no-rust !)
  $ f --size --sha256 .hg/store/00changelog-*.nd
  .hg/store/00changelog-????????????????.nd: size=123584, sha256=8c6cef6fd3d3fac291968793ee19a4be6d0b8375e9508bd5c7d4a8879e8df180 (glob) (pure !)
  .hg/store/00changelog-????????????????.nd: size=123584, sha256=eb9e9a4bcafdb5e1344bc8a0cbb3288b2106413b8efae6265fb8a7973d7e97f9 (glob) (rust !)
  .hg/store/00changelog-????????????????.nd: size=121088, sha256=342d36d30d86dde67d3cb6c002606c4a75bcad665595d941493845066d9c8ee0 (glob) (no-pure no-rust !)

Check that removing content does not confuse the nodemap
--------------------------------------------------------

removing data with rollback

  $ echo aso > a
  $ hg ci -m a4
  $ hg rollback
  repository tip rolled back to revision 5005 (undo commit)
  working directory now based on revision 5005
  $ hg id -r .
  90d5d3ba2fc4 tip

roming data with strip

  $ echo aso > a
  $ hg ci -m a4
  $ hg --config extensions.strip= strip -r . --no-backup
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg id -r . --traceback
  90d5d3ba2fc4 tip

Test upgrade / downgrade
========================

downgrading

  $ cat << EOF >> .hg/hgrc
  > [format]
  > use-persistent-nodemap=no
  > EOF
  $ hg debugformat -v
  format-variant     repo config default
  fncache:            yes    yes     yes
  dotencode:          yes    yes     yes
  generaldelta:       yes    yes     yes
  sparserevlog:       yes    yes     yes
  sidedata:            no     no      no
  persistent-nodemap: yes     no      no
  copies-sdc:          no     no      no
  plain-cl-delta:     yes    yes     yes
  compression:        zlib   zlib    zlib
  compression-level:  default default default
  $ hg debugupgraderepo --run --no-backup --quiet
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
     removed: persistent-nodemap
  
  $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
  [1]
  $ hg debugnodemap --metadata


upgrading

  $ cat << EOF >> .hg/hgrc
  > [format]
  > use-persistent-nodemap=yes
  > EOF
  $ hg debugformat -v
  format-variant     repo config default
  fncache:            yes    yes     yes
  dotencode:          yes    yes     yes
  generaldelta:       yes    yes     yes
  sparserevlog:       yes    yes     yes
  sidedata:            no     no      no
  persistent-nodemap:  no    yes      no
  copies-sdc:          no     no      no
  plain-cl-delta:     yes    yes     yes
  compression:        zlib   zlib    zlib
  compression-level:  default default default
  $ hg debugupgraderepo --run --no-backup --quiet
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
     added: persistent-nodemap
  
  $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
  00changelog-*.nd (glob)
  00changelog.n
  00manifest-*.nd (glob)
  00manifest.n

  $ hg debugnodemap --metadata
  uid: * (glob)
  tip-rev: 5005
  tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%

Running unrelated upgrade

  $ hg debugupgraderepo --run --no-backup --quiet --optimize re-delta-all
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, persistent-nodemap, revlogv1, sparserevlog, store
  
  optimisations: re-delta-all
  
  $ ls -1 .hg/store/ | egrep '00(changelog|manifest)(\.n|-.*\.nd)'
  00changelog-*.nd (glob)
  00changelog.n
  00manifest-*.nd (glob)
  00manifest.n

  $ hg debugnodemap --metadata
  uid: * (glob)
  tip-rev: 5005
  tip-node: 90d5d3ba2fc47db50f712570487cb261a68c8ffe
  data-length: 121088
  data-unused: 0
  data-unused: 0.000%