view tests/test-upgrade-repo.t @ 41979:0d467e4de4ae

discovery: fix embarrassing typo in slice definition

The code introduced in e514799e4e07 ended up having a silly bug. The indexing
selected a single item slice picking only p1. The discovery result was still
correct, but the sampling was hampered, sometime leading to much more round
trips being performed.

Fixing this issue restore the previous sampling behavior.

This fix has a negative performance impact on the pathological case the previous
test has been built.

# parent of this changesets
! wall 5.313884 comb 5.310000 user 5.260000 sys 0.050000 (best of 5)
! wall 6.711860 comb 6.710000 user 6.670000 sys 0.040000 (max of 5)
! wall 5.844016 comb 5.842000 user 5.784000 sys 0.058000 (avg of 5)
! wall 5.778635 comb 5.780000 user 5.740000 sys 0.040000 (median of 5)

# With this changesets.
! wall 6.350879 comb 6.350000 user 6.300000 sys 0.050000 (best of 5)
! wall 6.653647 comb 6.660000 user 6.480000 sys 0.180000 (max of 5)
! wall 6.492762 comb 6.494000 user 6.414000 sys 0.080000 (avg of 5)
! wall 6.547577 comb 6.550000 user 6.490000 sys 0.060000 (median of 5)

Changeset e514799e4e07 raised the question of using the "_uncheckedparentrevs"
instead of the current code. So I ran comparative timing:

# old code: 55919b96c02a (e514799e4e07 parent)
! wall 64.078708 comb 64.080000 user 63.160000 sys 0.920000 (best of 5)
! wall 68.296300 comb 68.290000 user 67.410000 sys 0.880000 (max of 5)
! wall 65.899075 comb 65.894000 user 65.082000 sys 0.812000 (avg of 5)
! wall 66.140286 comb 66.130000 user 65.330000 sys 0.800000 (median of 5)

# buggy code: e514799e4e07
! wall 46.605362 comb 46.610000 user 45.880000 sys 0.730000 (best of 5)
! wall 48.619659 comb 48.620000 user 47.890000 sys 0.730000 (max of 5)
! wall 47.350247 comb 47.350000 user 46.672000 sys 0.678000 (avg of 5)
! wall 46.983224 comb 46.980000 user 46.350000 sys 0.630000 (median of 5)

# fixed code: e514799e4e07 with this fix
! wall 55.858460 comb 55.850000 user 55.090000 sys 0.760000 (best of 5)
! wall 59.048805 comb 59.060000 user 58.110000 sys 0.950000 (max of 5)
! wall 57.192639 comb 57.192000 user 56.350000 sys 0.842000 (avg of 5)
! wall 57.056373 comb 57.060000 user 56.160000 sys 0.900000 (median of 5)

# version using uncheckedparents
! wall 56.471916 comb 56.470000 user 55.630000 sys 0.840000 (best of 5)
! wall 58.228793 comb 58.230000 user 57.600000 sys 0.630000 (max of 5)
! wall 57.377583 comb 57.378000 user 56.674000 sys 0.704000 (avg of 5)
! wall 57.008843 comb 57.010000 user 56.330000 sys 0.680000 (median of 5)

So it looks like the overhead from `_uncheckedparentrevs` is not that impactful.
I'll investigate this shortly. I'm almost done updating our benchmark suite
with more meaningful discovery cases.

#require no-reposimplestore

  $ cat >> $HGRCPATH << EOF
  > [extensions]
  > share =
  > EOF

store and revlogv1 are required in source

  $ hg --config format.usestore=false init no-store
  $ hg -R no-store debugupgraderepo
  abort: cannot upgrade repository; requirement missing: store
  [255]

  $ hg init no-revlogv1
  $ cat > no-revlogv1/.hg/requires << EOF
  > dotencode
  > fncache
  > generaldelta
  > store
  > EOF

  $ hg -R no-revlogv1 debugupgraderepo
  abort: cannot upgrade repository; requirement missing: revlogv1
  [255]

Cannot upgrade shared repositories

  $ hg init share-parent
  $ hg -q share share-parent share-child

  $ hg -R share-child debugupgraderepo
  abort: cannot upgrade repository; unsupported source requirement: shared
  [255]

Do not yet support upgrading treemanifest repos

  $ hg --config experimental.treemanifest=true init treemanifest
  $ hg -R treemanifest debugupgraderepo
  abort: cannot upgrade repository; unsupported source requirement: treemanifest
  [255]

Cannot add treemanifest requirement during upgrade

  $ hg init disallowaddedreq
  $ hg -R disallowaddedreq --config experimental.treemanifest=true debugupgraderepo
  abort: cannot upgrade repository; do not support adding requirement: treemanifest
  [255]

An upgrade of a repository created with recommended settings only suggests optimizations

  $ hg init empty
  $ cd empty
  $ hg debugformat
  format-variant repo
  fncache:        yes
  dotencode:      yes
  generaldelta:   yes
  sparserevlog:   yes
  plain-cl-delta: yes
  compression:    zlib
  $ hg debugformat --verbose
  format-variant repo config default
  fncache:        yes    yes     yes
  dotencode:      yes    yes     yes
  generaldelta:   yes    yes     yes
  sparserevlog:   yes    yes     yes
  plain-cl-delta: yes    yes     yes
  compression:    zlib   zlib    zlib
  $ hg debugformat --verbose --config format.usefncache=no
  format-variant repo config default
  fncache:        yes     no     yes
  dotencode:      yes     no     yes
  generaldelta:   yes    yes     yes
  sparserevlog:   yes    yes     yes
  plain-cl-delta: yes    yes     yes
  compression:    zlib   zlib    zlib
  $ hg debugformat --verbose --config format.usefncache=no --color=debug
  format-variant repo config default
  [formatvariant.name.mismatchconfig|fncache:       ][formatvariant.repo.mismatchconfig| yes][formatvariant.config.special|     no][formatvariant.default|     yes]
  [formatvariant.name.mismatchconfig|dotencode:     ][formatvariant.repo.mismatchconfig| yes][formatvariant.config.special|     no][formatvariant.default|     yes]
  [formatvariant.name.uptodate|generaldelta:  ][formatvariant.repo.uptodate| yes][formatvariant.config.default|    yes][formatvariant.default|     yes]
  [formatvariant.name.uptodate|sparserevlog:  ][formatvariant.repo.uptodate| yes][formatvariant.config.default|    yes][formatvariant.default|     yes]
  [formatvariant.name.uptodate|plain-cl-delta:][formatvariant.repo.uptodate| yes][formatvariant.config.default|    yes][formatvariant.default|     yes]
  [formatvariant.name.uptodate|compression:   ][formatvariant.repo.uptodate| zlib][formatvariant.config.default|   zlib][formatvariant.default|    zlib]
  $ hg debugformat -Tjson
  [
   {
    "config": true,
    "default": true,
    "name": "fncache",
    "repo": true
   },
   {
    "config": true,
    "default": true,
    "name": "dotencode",
    "repo": true
   },
   {
    "config": true,
    "default": true,
    "name": "generaldelta",
    "repo": true
   },
   {
    "config": true,
    "default": true,
    "name": "sparserevlog",
    "repo": true
   },
   {
    "config": true,
    "default": true,
    "name": "plain-cl-delta",
    "repo": true
   },
   {
    "config": "zlib",
    "default": "zlib",
    "name": "compression",
    "repo": "zlib"
   }
  ]
  $ hg debugupgraderepo
  (no feature deficiencies found in existing repository)
  performing an upgrade with "--run" will make the following changes:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
  
  additional optimizations are available by specifying "--optimize <name>":
  
  re-delta-parent
     deltas within internal storage will be recalculated to choose an optimal base revision where this was not already done; the size of the repository may shrink and various operations may become faster; the first time this optimization is performed could slow down upgrade execution considerably; subsequent invocations should not run noticeably slower
  
  re-delta-multibase
     deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges
  
  re-delta-all
     deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed
  
  re-delta-fulladd
     every revision will be re-added as if it was new content. It will go through the full storage mechanism giving extensions a chance to process it (eg. lfs). This is similar to "re-delta-all" but even slower since more logic is involved.
  

--optimize can be used to add optimizations

  $ hg debugupgrade --optimize redeltaparent
  (no feature deficiencies found in existing repository)
  performing an upgrade with "--run" will make the following changes:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
  
  re-delta-parent
     deltas within internal storage will choose a new base revision if needed
  
  additional optimizations are available by specifying "--optimize <name>":
  
  re-delta-multibase
     deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges
  
  re-delta-all
     deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed
  
  re-delta-fulladd
     every revision will be re-added as if it was new content. It will go through the full storage mechanism giving extensions a chance to process it (eg. lfs). This is similar to "re-delta-all" but even slower since more logic is involved.
  

modern form of the option

  $ hg debugupgrade --optimize re-delta-parent
  (no feature deficiencies found in existing repository)
  performing an upgrade with "--run" will make the following changes:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
  
  re-delta-parent
     deltas within internal storage will choose a new base revision if needed
  
  additional optimizations are available by specifying "--optimize <name>":
  
  re-delta-multibase
     deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges
  
  re-delta-all
     deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed
  
  re-delta-fulladd
     every revision will be re-added as if it was new content. It will go through the full storage mechanism giving extensions a chance to process it (eg. lfs). This is similar to "re-delta-all" but even slower since more logic is involved.
  

unknown optimization:

  $ hg debugupgrade --optimize foobar
  abort: unknown optimization action requested: foobar
  (run without arguments to see valid optimizations)
  [255]

Various sub-optimal detections work

  $ cat > .hg/requires << EOF
  > revlogv1
  > store
  > EOF

  $ hg debugformat
  format-variant repo
  fncache:         no
  dotencode:       no
  generaldelta:    no
  sparserevlog:    no
  plain-cl-delta: yes
  compression:    zlib
  $ hg debugformat --verbose
  format-variant repo config default
  fncache:         no    yes     yes
  dotencode:       no    yes     yes
  generaldelta:    no    yes     yes
  sparserevlog:    no    yes     yes
  plain-cl-delta: yes    yes     yes
  compression:    zlib   zlib    zlib
  $ hg debugformat --verbose --config format.usegeneraldelta=no
  format-variant repo config default
  fncache:         no    yes     yes
  dotencode:       no    yes     yes
  generaldelta:    no     no     yes
  sparserevlog:    no     no     yes
  plain-cl-delta: yes    yes     yes
  compression:    zlib   zlib    zlib
  $ hg debugformat --verbose --config format.usegeneraldelta=no --color=debug
  format-variant repo config default
  [formatvariant.name.mismatchconfig|fncache:       ][formatvariant.repo.mismatchconfig|  no][formatvariant.config.default|    yes][formatvariant.default|     yes]
  [formatvariant.name.mismatchconfig|dotencode:     ][formatvariant.repo.mismatchconfig|  no][formatvariant.config.default|    yes][formatvariant.default|     yes]
  [formatvariant.name.mismatchdefault|generaldelta:  ][formatvariant.repo.mismatchdefault|  no][formatvariant.config.special|     no][formatvariant.default|     yes]
  [formatvariant.name.mismatchdefault|sparserevlog:  ][formatvariant.repo.mismatchdefault|  no][formatvariant.config.special|     no][formatvariant.default|     yes]
  [formatvariant.name.uptodate|plain-cl-delta:][formatvariant.repo.uptodate| yes][formatvariant.config.default|    yes][formatvariant.default|     yes]
  [formatvariant.name.uptodate|compression:   ][formatvariant.repo.uptodate| zlib][formatvariant.config.default|   zlib][formatvariant.default|    zlib]
  $ hg debugupgraderepo
  repository lacks features recommended by current config options:
  
  fncache
     long and reserved filenames may not work correctly; repository performance is sub-optimal
  
  dotencode
     storage of filenames beginning with a period or space may not work correctly
  
  generaldelta
     deltas within internal storage are unable to choose optimal revisions; repository is larger and slower than it could be; interaction with other repositories may require extra network and CPU resources, making "hg push" and "hg pull" slower
  
  sparserevlog
     in order to limit disk reading and memory usage on older version, the span of a delta chain from its root to its end is limited, whatever the relevant data in this span. This can severly limit Mercurial ability to build good chain of delta resulting is much more storage space being taken and limit reusability of on disk delta during exchange.
  
  
  performing an upgrade with "--run" will make the following changes:
  
  requirements
     preserved: revlogv1, store
     added: dotencode, fncache, generaldelta, sparserevlog
  
  fncache
     repository will be more resilient to storing certain paths and performance of certain operations should be improved
  
  dotencode
     repository will be better able to store files beginning with a space or period
  
  generaldelta
     repository storage will be able to create optimal deltas; new repository data will be smaller and read times should decrease; interacting with other repositories using this storage model should require less network and CPU resources, making "hg push" and "hg pull" faster
  
  sparserevlog
     Revlog supports delta chain with more unused data between payload. These gaps will be skipped at read time. This allows for better delta chains, making a better compression and faster exchange with server.
  
  additional optimizations are available by specifying "--optimize <name>":
  
  re-delta-parent
     deltas within internal storage will be recalculated to choose an optimal base revision where this was not already done; the size of the repository may shrink and various operations may become faster; the first time this optimization is performed could slow down upgrade execution considerably; subsequent invocations should not run noticeably slower
  
  re-delta-multibase
     deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges
  
  re-delta-all
     deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed
  
  re-delta-fulladd
     every revision will be re-added as if it was new content. It will go through the full storage mechanism giving extensions a chance to process it (eg. lfs). This is similar to "re-delta-all" but even slower since more logic is involved.
  

  $ hg --config format.dotencode=false debugupgraderepo
  repository lacks features recommended by current config options:
  
  fncache
     long and reserved filenames may not work correctly; repository performance is sub-optimal
  
  generaldelta
     deltas within internal storage are unable to choose optimal revisions; repository is larger and slower than it could be; interaction with other repositories may require extra network and CPU resources, making "hg push" and "hg pull" slower
  
  sparserevlog
     in order to limit disk reading and memory usage on older version, the span of a delta chain from its root to its end is limited, whatever the relevant data in this span. This can severly limit Mercurial ability to build good chain of delta resulting is much more storage space being taken and limit reusability of on disk delta during exchange.
  
  repository lacks features used by the default config options:
  
  dotencode
     storage of filenames beginning with a period or space may not work correctly
  
  
  performing an upgrade with "--run" will make the following changes:
  
  requirements
     preserved: revlogv1, store
     added: fncache, generaldelta, sparserevlog
  
  fncache
     repository will be more resilient to storing certain paths and performance of certain operations should be improved
  
  generaldelta
     repository storage will be able to create optimal deltas; new repository data will be smaller and read times should decrease; interacting with other repositories using this storage model should require less network and CPU resources, making "hg push" and "hg pull" faster
  
  sparserevlog
     Revlog supports delta chain with more unused data between payload. These gaps will be skipped at read time. This allows for better delta chains, making a better compression and faster exchange with server.
  
  additional optimizations are available by specifying "--optimize <name>":
  
  re-delta-parent
     deltas within internal storage will be recalculated to choose an optimal base revision where this was not already done; the size of the repository may shrink and various operations may become faster; the first time this optimization is performed could slow down upgrade execution considerably; subsequent invocations should not run noticeably slower
  
  re-delta-multibase
     deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges
  
  re-delta-all
     deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed
  
  re-delta-fulladd
     every revision will be re-added as if it was new content. It will go through the full storage mechanism giving extensions a chance to process it (eg. lfs). This is similar to "re-delta-all" but even slower since more logic is involved.
  

  $ cd ..

Upgrading a repository that is already modern essentially no-ops

  $ hg init modern
  $ hg -R modern debugupgraderepo --run
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
  
  beginning upgrade...
  repository locked and read-only
  creating temporary repository to stage migrated data: $TESTTMP/modern/.hg/upgrade.* (glob)
  (it is safe to interrupt this process any time before data migration completes)
  data fully migrated to temporary repository
  marking source repository as being upgraded; clients will be unable to read from repository
  starting in-place swap of repository data
  replaced files will be backed up at $TESTTMP/modern/.hg/upgradebackup.* (glob)
  replacing store...
  store replacement complete; repository was inconsistent for *s (glob)
  finalizing requirements file and making repository readable again
  removing temporary repository $TESTTMP/modern/.hg/upgrade.* (glob)
  copy of old repository backed up at $TESTTMP/modern/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified

Upgrading a repository to generaldelta works

  $ hg --config format.usegeneraldelta=false init upgradegd
  $ cd upgradegd
  $ touch f0
  $ hg -q commit -A -m initial
  $ touch f1
  $ hg -q commit -A -m 'add f1'
  $ hg -q up -r 0
  $ touch f2
  $ hg -q commit -A -m 'add f2'

  $ hg debugupgraderepo --run --config format.sparse-revlog=false
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, revlogv1, store
     added: generaldelta
  
  generaldelta
     repository storage will be able to create optimal deltas; new repository data will be smaller and read times should decrease; interacting with other repositories using this storage model should require less network and CPU resources, making "hg push" and "hg pull" faster
  
  beginning upgrade...
  repository locked and read-only
  creating temporary repository to stage migrated data: $TESTTMP/upgradegd/.hg/upgrade.* (glob)
  (it is safe to interrupt this process any time before data migration completes)
  migrating 9 total revisions (3 in filelogs, 3 in manifests, 3 in changelog)
  migrating 917 bytes in store; 401 bytes tracked data
  migrating 3 filelogs containing 3 revisions (192 bytes in store; 0 bytes tracked data)
  finished migrating 3 filelog revisions across 3 filelogs; change in size: 0 bytes
  migrating 1 manifests containing 3 revisions (349 bytes in store; 220 bytes tracked data)
  finished migrating 3 manifest revisions across 1 manifests; change in size: 0 bytes
  migrating changelog containing 3 revisions (376 bytes in store; 181 bytes tracked data)
  finished migrating 3 changelog revisions; change in size: 0 bytes
  finished migrating 9 total revisions; total change in store size: 0 bytes
  copying phaseroots
  data fully migrated to temporary repository
  marking source repository as being upgraded; clients will be unable to read from repository
  starting in-place swap of repository data
  replaced files will be backed up at $TESTTMP/upgradegd/.hg/upgradebackup.* (glob)
  replacing store...
  store replacement complete; repository was inconsistent for *s (glob)
  finalizing requirements file and making repository readable again
  removing temporary repository $TESTTMP/upgradegd/.hg/upgrade.* (glob)
  copy of old repository backed up at $TESTTMP/upgradegd/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified

Original requirements backed up

  $ cat .hg/upgradebackup.*/requires
  dotencode
  fncache
  revlogv1
  store

generaldelta added to original requirements files

  $ cat .hg/requires
  dotencode
  fncache
  generaldelta
  revlogv1
  store

store directory has files we expect

  $ ls .hg/store
  00changelog.i
  00manifest.i
  data
  fncache
  phaseroots
  undo
  undo.backupfiles
  undo.phaseroots

manifest should be generaldelta

  $ hg debugrevlog -m | grep flags
  flags  : inline, generaldelta

verify should be happy

  $ hg verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  checked 3 changesets with 3 changes to 3 files

old store should be backed up

  $ ls -d .hg/upgradebackup.*/
  .hg/upgradebackup.*/ (glob)
  $ ls .hg/upgradebackup.*/store
  00changelog.i
  00manifest.i
  data
  fncache
  phaseroots
  undo
  undo.backup.fncache
  undo.backupfiles
  undo.phaseroots

unless --no-backup is passed

  $ rm -rf .hg/upgradebackup.*/
  $ hg debugupgraderepo --run --no-backup
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, store
     added: sparserevlog
  
  sparserevlog
     Revlog supports delta chain with more unused data between payload. These gaps will be skipped at read time. This allows for better delta chains, making a better compression and faster exchange with server.
  
  beginning upgrade...
  repository locked and read-only
  creating temporary repository to stage migrated data: $TESTTMP/upgradegd/.hg/upgrade.* (glob)
  (it is safe to interrupt this process any time before data migration completes)
  migrating 9 total revisions (3 in filelogs, 3 in manifests, 3 in changelog)
  migrating 917 bytes in store; 401 bytes tracked data
  migrating 3 filelogs containing 3 revisions (192 bytes in store; 0 bytes tracked data)
  finished migrating 3 filelog revisions across 3 filelogs; change in size: 0 bytes
  migrating 1 manifests containing 3 revisions (349 bytes in store; 220 bytes tracked data)
  finished migrating 3 manifest revisions across 1 manifests; change in size: 0 bytes
  migrating changelog containing 3 revisions (376 bytes in store; 181 bytes tracked data)
  finished migrating 3 changelog revisions; change in size: 0 bytes
  finished migrating 9 total revisions; total change in store size: 0 bytes
  copying phaseroots
  data fully migrated to temporary repository
  marking source repository as being upgraded; clients will be unable to read from repository
  starting in-place swap of repository data
  replaced files will be backed up at $TESTTMP/upgradegd/.hg/upgradebackup.* (glob)
  replacing store...
  store replacement complete; repository was inconsistent for 0.0s
  finalizing requirements file and making repository readable again
  removing old repository content$TESTTMP/upgradegd/.hg/upgradebackup.* (glob)
  removing temporary repository $TESTTMP/upgradegd/.hg/upgrade.* (glob)
  $ ls -1 .hg/ | grep upgradebackup
  [1]
  $ cd ..


store files with special filenames aren't encoded during copy

  $ hg init store-filenames
  $ cd store-filenames
  $ touch foo
  $ hg -q commit -A -m initial
  $ touch .hg/store/.XX_special_filename

  $ hg debugupgraderepo --run
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
  
  beginning upgrade...
  repository locked and read-only
  creating temporary repository to stage migrated data: $TESTTMP/store-filenames/.hg/upgrade.* (glob)
  (it is safe to interrupt this process any time before data migration completes)
  migrating 3 total revisions (1 in filelogs, 1 in manifests, 1 in changelog)
  migrating 301 bytes in store; 107 bytes tracked data
  migrating 1 filelogs containing 1 revisions (64 bytes in store; 0 bytes tracked data)
  finished migrating 1 filelog revisions across 1 filelogs; change in size: 0 bytes
  migrating 1 manifests containing 1 revisions (110 bytes in store; 45 bytes tracked data)
  finished migrating 1 manifest revisions across 1 manifests; change in size: 0 bytes
  migrating changelog containing 1 revisions (127 bytes in store; 62 bytes tracked data)
  finished migrating 1 changelog revisions; change in size: 0 bytes
  finished migrating 3 total revisions; total change in store size: 0 bytes
  copying .XX_special_filename
  copying phaseroots
  data fully migrated to temporary repository
  marking source repository as being upgraded; clients will be unable to read from repository
  starting in-place swap of repository data
  replaced files will be backed up at $TESTTMP/store-filenames/.hg/upgradebackup.* (glob)
  replacing store...
  store replacement complete; repository was inconsistent for *s (glob)
  finalizing requirements file and making repository readable again
  removing temporary repository $TESTTMP/store-filenames/.hg/upgrade.* (glob)
  copy of old repository backed up at $TESTTMP/store-filenames/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified
  $ hg debugupgraderepo --run --optimize redeltafulladd
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
  
  re-delta-fulladd
     each revision will be added as new content to the internal storage; this will likely drastically slow down execution time, but some extensions might need it
  
  beginning upgrade...
  repository locked and read-only
  creating temporary repository to stage migrated data: $TESTTMP/store-filenames/.hg/upgrade.* (glob)
  (it is safe to interrupt this process any time before data migration completes)
  migrating 3 total revisions (1 in filelogs, 1 in manifests, 1 in changelog)
  migrating 301 bytes in store; 107 bytes tracked data
  migrating 1 filelogs containing 1 revisions (64 bytes in store; 0 bytes tracked data)
  finished migrating 1 filelog revisions across 1 filelogs; change in size: 0 bytes
  migrating 1 manifests containing 1 revisions (110 bytes in store; 45 bytes tracked data)
  finished migrating 1 manifest revisions across 1 manifests; change in size: 0 bytes
  migrating changelog containing 1 revisions (127 bytes in store; 62 bytes tracked data)
  finished migrating 1 changelog revisions; change in size: 0 bytes
  finished migrating 3 total revisions; total change in store size: 0 bytes
  copying .XX_special_filename
  copying phaseroots
  data fully migrated to temporary repository
  marking source repository as being upgraded; clients will be unable to read from repository
  starting in-place swap of repository data
  replaced files will be backed up at $TESTTMP/store-filenames/.hg/upgradebackup.* (glob)
  replacing store...
  store replacement complete; repository was inconsistent for *s (glob)
  finalizing requirements file and making repository readable again
  removing temporary repository $TESTTMP/store-filenames/.hg/upgrade.* (glob)
  copy of old repository backed up at $TESTTMP/store-filenames/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified

fncache is valid after upgrade

  $ hg debugrebuildfncache
  fncache already up to date

  $ cd ..

Check upgrading a large file repository
---------------------------------------

  $ hg init largefilesrepo
  $ cat << EOF >> largefilesrepo/.hg/hgrc
  > [extensions]
  > largefiles =
  > EOF

  $ cd largefilesrepo
  $ touch foo
  $ hg add --large foo
  $ hg -q commit -m initial
  $ cat .hg/requires
  dotencode
  fncache
  generaldelta
  largefiles
  revlogv1
  sparserevlog
  store

  $ hg debugupgraderepo --run
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, largefiles, revlogv1, sparserevlog, store
  
  beginning upgrade...
  repository locked and read-only
  creating temporary repository to stage migrated data: $TESTTMP/largefilesrepo/.hg/upgrade.* (glob)
  (it is safe to interrupt this process any time before data migration completes)
  migrating 3 total revisions (1 in filelogs, 1 in manifests, 1 in changelog)
  migrating 355 bytes in store; 160 bytes tracked data
  migrating 1 filelogs containing 1 revisions (106 bytes in store; 41 bytes tracked data)
  finished migrating 1 filelog revisions across 1 filelogs; change in size: 0 bytes
  migrating 1 manifests containing 1 revisions (116 bytes in store; 51 bytes tracked data)
  finished migrating 1 manifest revisions across 1 manifests; change in size: 0 bytes
  migrating changelog containing 1 revisions (133 bytes in store; 68 bytes tracked data)
  finished migrating 1 changelog revisions; change in size: 0 bytes
  finished migrating 3 total revisions; total change in store size: 0 bytes
  copying phaseroots
  data fully migrated to temporary repository
  marking source repository as being upgraded; clients will be unable to read from repository
  starting in-place swap of repository data
  replaced files will be backed up at $TESTTMP/largefilesrepo/.hg/upgradebackup.* (glob)
  replacing store...
  store replacement complete; repository was inconsistent for *s (glob)
  finalizing requirements file and making repository readable again
  removing temporary repository $TESTTMP/largefilesrepo/.hg/upgrade.* (glob)
  copy of old repository backed up at $TESTTMP/largefilesrepo/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified
  $ cat .hg/requires
  dotencode
  fncache
  generaldelta
  largefiles
  revlogv1
  sparserevlog
  store

  $ cat << EOF >> .hg/hgrc
  > [extensions]
  > lfs =
  > [lfs]
  > threshold = 10
  > EOF
  $ echo '123456789012345' > lfs.bin
  $ hg ci -Am 'lfs.bin'
  adding lfs.bin
  $ grep lfs .hg/requires
  lfs
  $ find .hg/store/lfs -type f
  .hg/store/lfs/objects/d0/beab232adff5ba365880366ad30b1edb85c4c5372442b5d2fe27adc96d653f

  $ hg debugupgraderepo --run
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, largefiles, lfs, revlogv1, sparserevlog, store
  
  beginning upgrade...
  repository locked and read-only
  creating temporary repository to stage migrated data: $TESTTMP/largefilesrepo/.hg/upgrade.* (glob)
  (it is safe to interrupt this process any time before data migration completes)
  migrating 6 total revisions (2 in filelogs, 2 in manifests, 2 in changelog)
  migrating 801 bytes in store; 467 bytes tracked data
  migrating 2 filelogs containing 2 revisions (296 bytes in store; 182 bytes tracked data)
  finished migrating 2 filelog revisions across 2 filelogs; change in size: 0 bytes
  migrating 1 manifests containing 2 revisions (241 bytes in store; 151 bytes tracked data)
  finished migrating 2 manifest revisions across 1 manifests; change in size: 0 bytes
  migrating changelog containing 2 revisions (264 bytes in store; 134 bytes tracked data)
  finished migrating 2 changelog revisions; change in size: 0 bytes
  finished migrating 6 total revisions; total change in store size: 0 bytes
  copying phaseroots
  copying lfs blob d0beab232adff5ba365880366ad30b1edb85c4c5372442b5d2fe27adc96d653f
  data fully migrated to temporary repository
  marking source repository as being upgraded; clients will be unable to read from repository
  starting in-place swap of repository data
  replaced files will be backed up at $TESTTMP/largefilesrepo/.hg/upgradebackup.* (glob)
  replacing store...
  store replacement complete; repository was inconsistent for *s (glob)
  finalizing requirements file and making repository readable again
  removing temporary repository $TESTTMP/largefilesrepo/.hg/upgrade.* (glob)
  copy of old repository backed up at $TESTTMP/largefilesrepo/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified

  $ grep lfs .hg/requires
  lfs
  $ find .hg/store/lfs -type f
  .hg/store/lfs/objects/d0/beab232adff5ba365880366ad30b1edb85c4c5372442b5d2fe27adc96d653f
  $ hg verify
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  checked 2 changesets with 2 changes to 2 files
  $ hg debugdata lfs.bin 0
  version https://git-lfs.github.com/spec/v1
  oid sha256:d0beab232adff5ba365880366ad30b1edb85c4c5372442b5d2fe27adc96d653f
  size 16
  x-is-binary 0

  $ cd ..

repository config is taken in account
-------------------------------------

  $ cat << EOF >> $HGRCPATH
  > [format]
  > maxchainlen = 1
  > EOF

  $ hg init localconfig
  $ cd localconfig
  $ cat << EOF > file
  > some content
  > with some length
  > to make sure we get a delta
  > after changes
  > very long
  > very long
  > very long
  > very long
  > very long
  > very long
  > very long
  > very long
  > very long
  > very long
  > very long
  > EOF
  $ hg -q commit -A -m A
  $ echo "new line" >> file
  $ hg -q commit -m B
  $ echo "new line" >> file
  $ hg -q commit -m C

  $ cat << EOF >> .hg/hgrc
  > [format]
  > maxchainlen = 9001
  > EOF
  $ hg config format
  format.maxchainlen=9001
  $ hg debugdeltachain file
      rev  chain# chainlen     prev   delta       size    rawsize  chainsize     ratio   lindist extradist extraratio   readsize largestblk rddensity srchunks
        0       1        1       -1    base         77        182         77   0.42308        77         0    0.00000         77         77   1.00000        1
        1       1        2        0      p1         21        191         98   0.51309        98         0    0.00000         98         98   1.00000        1
        2       1        2        0   other         30        200        107   0.53500       128        21    0.19626        128        128   0.83594        1

  $ hg debugupgraderepo --run --optimize redeltaall
  upgrade will perform the following actions:
  
  requirements
     preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
  
  re-delta-all
     deltas within internal storage will be fully recomputed; this will likely drastically slow down execution time
  
  beginning upgrade...
  repository locked and read-only
  creating temporary repository to stage migrated data: $TESTTMP/localconfig/.hg/upgrade.* (glob)
  (it is safe to interrupt this process any time before data migration completes)
  migrating 9 total revisions (3 in filelogs, 3 in manifests, 3 in changelog)
  migrating 1019 bytes in store; 882 bytes tracked data
  migrating 1 filelogs containing 3 revisions (320 bytes in store; 573 bytes tracked data)
  finished migrating 3 filelog revisions across 1 filelogs; change in size: -9 bytes
  migrating 1 manifests containing 3 revisions (333 bytes in store; 138 bytes tracked data)
  finished migrating 3 manifest revisions across 1 manifests; change in size: 0 bytes
  migrating changelog containing 3 revisions (366 bytes in store; 171 bytes tracked data)
  finished migrating 3 changelog revisions; change in size: 0 bytes
  finished migrating 9 total revisions; total change in store size: -9 bytes
  copying phaseroots
  data fully migrated to temporary repository
  marking source repository as being upgraded; clients will be unable to read from repository
  starting in-place swap of repository data
  replaced files will be backed up at $TESTTMP/localconfig/.hg/upgradebackup.* (glob)
  replacing store...
  store replacement complete; repository was inconsistent for *s (glob)
  finalizing requirements file and making repository readable again
  removing temporary repository $TESTTMP/localconfig/.hg/upgrade.* (glob)
  copy of old repository backed up at $TESTTMP/localconfig/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified
  $ hg debugdeltachain file
      rev  chain# chainlen     prev   delta       size    rawsize  chainsize     ratio   lindist extradist extraratio   readsize largestblk rddensity srchunks
        0       1        1       -1    base         77        182         77   0.42308        77         0    0.00000         77         77   1.00000        1
        1       1        2        0      p1         21        191         98   0.51309        98         0    0.00000         98         98   1.00000        1
        2       1        3        1      p1         21        200        119   0.59500       119         0    0.00000        119        119   1.00000        1
  $ cd ..

  $ cat << EOF >> $HGRCPATH
  > [format]
  > maxchainlen = 9001
  > EOF

Check upgrading a sparse-revlog repository
---------------------------------------

  $ hg init sparserevlogrepo --config format.sparse-revlog=no
  $ cd sparserevlogrepo
  $ touch foo
  $ hg add foo
  $ hg -q commit -m "foo"
  $ cat .hg/requires
  dotencode
  fncache
  generaldelta
  revlogv1
  store

Check that we can add the sparse-revlog format requirement
  $ hg --config format.sparse-revlog=yes debugupgraderepo --run >/dev/null
  copy of old repository backed up at $TESTTMP/sparserevlogrepo/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified
  $ cat .hg/requires
  dotencode
  fncache
  generaldelta
  revlogv1
  sparserevlog
  store

Check that we can remove the sparse-revlog format requirement
  $ hg --config format.sparse-revlog=no debugupgraderepo --run >/dev/null
  copy of old repository backed up at $TESTTMP/sparserevlogrepo/.hg/upgradebackup.* (glob)
  the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified
  $ cat .hg/requires
  dotencode
  fncache
  generaldelta
  revlogv1
  store
  $ cd ..