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diff tests/test-remotefilelog-repack.t @ 40495:3a333a582d7b

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remotefilelog: import pruned-down remotefilelog extension from hg-experimental This is remotefilelog as of my recent patches for compatibility with current tip of hg, minus support for old versions of Mercurial and some FB-specific features like their treemanifest extension and fetching linkrev data from a patched phabricator. The file extutil.py moved from hgext3rd to remotefilelog. This is not yet ready to be landed, consider it a preview for now. Planned changes include: * replace lz4 with zstd * rename some capabilities, requirements and wireproto commands to mark them as experimental * consolidate bits of shallowutil with related functions (eg readfile) I'm certainly open to other (small) changes, but my rough mission is to land this largely as-is so we can use it as a model of the functionality we need going forward for lazy-fetching of file contents from a server. # no-check-commit because of a few foo_bar functions Differential Revision: https://phab.mercurial-scm.org/D4782
author Augie Fackler <augie@google.com>
date Thu, 27 Sep 2018 13:03:19 -0400
parents
children 6d64e2abe8d3
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-remotefilelog-repack.t	Thu Sep 27 13:03:19 2018 -0400
@@ -0,0 +1,483 @@
+  $ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
+  $ export PYTHONPATH
+
+  $ . "$TESTDIR/remotefilelog-library.sh"
+
+  $ hginit master
+  $ cd master
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > server=True
+  > serverexpiration=-1
+  > EOF
+  $ echo x > x
+  $ hg commit -qAm x
+  $ echo x >> x
+  $ hg commit -qAm x2
+  $ cd ..
+
+  $ hgcloneshallow ssh://user@dummy/master shallow -q
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
+
+# Set the prefetchdays config to zero so that all commits are prefetched
+# no matter what their creation date is.
+  $ cd shallow
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > prefetchdays=0
+  > EOF
+  $ cd ..
+
+# Test that repack cleans up the old files and creates new packs
+
+  $ cd shallow
+  $ find $CACHEDIR | sort
+  $TESTTMP/hgcache
+  $TESTTMP/hgcache/master
+  $TESTTMP/hgcache/master/11
+  $TESTTMP/hgcache/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072
+  $TESTTMP/hgcache/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/aee31534993a501858fb6dd96a065671922e7d51
+  $TESTTMP/hgcache/repos
+
+  $ hg repack
+
+  $ find $CACHEDIR | sort
+  $TESTTMP/hgcache
+  $TESTTMP/hgcache/master
+  $TESTTMP/hgcache/master/packs
+  $TESTTMP/hgcache/master/packs/276d308429d0303762befa376788300f0310f90e.histidx
+  $TESTTMP/hgcache/master/packs/276d308429d0303762befa376788300f0310f90e.histpack
+  $TESTTMP/hgcache/master/packs/8e25dec685d5e0bb1f1b39df3acebda0e0d75c6e.dataidx
+  $TESTTMP/hgcache/master/packs/8e25dec685d5e0bb1f1b39df3acebda0e0d75c6e.datapack
+  $TESTTMP/hgcache/master/packs/repacklock
+  $TESTTMP/hgcache/repos
+
+# Test that the packs are readonly
+  $ ls_l $CACHEDIR/master/packs
+  -r--r--r--    1145 276d308429d0303762befa376788300f0310f90e.histidx
+  -r--r--r--     172 276d308429d0303762befa376788300f0310f90e.histpack
+  -r--r--r--    1074 8e25dec685d5e0bb1f1b39df3acebda0e0d75c6e.dataidx
+  -r--r--r--      69 8e25dec685d5e0bb1f1b39df3acebda0e0d75c6e.datapack
+  -rw-r--r--       0 repacklock
+
+# Test that the data in the new packs is accessible
+  $ hg cat -r . x
+  x
+  x
+
+# Test that adding new data and repacking it results in the loose data and the
+# old packs being combined.
+
+  $ cd ../master
+  $ echo x >> x
+  $ hg commit -m x3
+  $ cd ../shallow
+  $ hg pull -q
+  $ hg up -q tip
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over * (glob)
+
+  $ find $CACHEDIR -type f | sort
+  $TESTTMP/hgcache/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/d4a3ed9310e5bd9887e3bf779da5077efab28216
+  $TESTTMP/hgcache/master/packs/276d308429d0303762befa376788300f0310f90e.histidx
+  $TESTTMP/hgcache/master/packs/276d308429d0303762befa376788300f0310f90e.histpack
+  $TESTTMP/hgcache/master/packs/8e25dec685d5e0bb1f1b39df3acebda0e0d75c6e.dataidx
+  $TESTTMP/hgcache/master/packs/8e25dec685d5e0bb1f1b39df3acebda0e0d75c6e.datapack
+  $TESTTMP/hgcache/master/packs/repacklock
+  $TESTTMP/hgcache/repos
+
+# First assert that with --packsonly, the loose object will be ignored:
+
+  $ hg repack --packsonly
+
+  $ find $CACHEDIR -type f | sort
+  $TESTTMP/hgcache/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/d4a3ed9310e5bd9887e3bf779da5077efab28216
+  $TESTTMP/hgcache/master/packs/276d308429d0303762befa376788300f0310f90e.histidx
+  $TESTTMP/hgcache/master/packs/276d308429d0303762befa376788300f0310f90e.histpack
+  $TESTTMP/hgcache/master/packs/8e25dec685d5e0bb1f1b39df3acebda0e0d75c6e.dataidx
+  $TESTTMP/hgcache/master/packs/8e25dec685d5e0bb1f1b39df3acebda0e0d75c6e.datapack
+  $TESTTMP/hgcache/master/packs/repacklock
+  $TESTTMP/hgcache/repos
+
+  $ hg repack --traceback
+
+  $ find $CACHEDIR -type f | sort
+  $TESTTMP/hgcache/master/packs/077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histidx
+  $TESTTMP/hgcache/master/packs/077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histpack
+  $TESTTMP/hgcache/master/packs/935861cae0be6ce41a0d47a529e4d097e9e68a69.dataidx
+  $TESTTMP/hgcache/master/packs/935861cae0be6ce41a0d47a529e4d097e9e68a69.datapack
+  $TESTTMP/hgcache/master/packs/repacklock
+  $TESTTMP/hgcache/repos
+
+# Verify all the file data is still available
+  $ hg cat -r . x
+  x
+  x
+  x
+  $ hg cat -r '.^' x
+  x
+  x
+
+# Test that repacking again without new data does not delete the pack files
+# and did not change the pack names
+  $ hg repack
+  $ find $CACHEDIR -type f | sort
+  $TESTTMP/hgcache/master/packs/077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histidx
+  $TESTTMP/hgcache/master/packs/077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histpack
+  $TESTTMP/hgcache/master/packs/935861cae0be6ce41a0d47a529e4d097e9e68a69.dataidx
+  $TESTTMP/hgcache/master/packs/935861cae0be6ce41a0d47a529e4d097e9e68a69.datapack
+  $TESTTMP/hgcache/master/packs/repacklock
+  $TESTTMP/hgcache/repos
+
+# Run two repacks at once
+  $ hg repack --config "hooks.prerepack=sleep 3" &
+  $ sleep 1
+  $ hg repack
+  skipping repack - another repack is already running
+  $ hg debugwaitonrepack >/dev/null 2>&1
+
+# Run repack in the background
+  $ cd ../master
+  $ echo x >> x
+  $ hg commit -m x4
+  $ cd ../shallow
+  $ hg pull -q
+  $ hg up -q tip
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over * (glob)
+  $ find $CACHEDIR -type f | sort
+  $TESTTMP/hgcache/master/11/f6ad8ec52a2984abaafd7c3b516503785c2072/1bb2e6237e035c8f8ef508e281f1ce075bc6db72
+  $TESTTMP/hgcache/master/packs/077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histidx
+  $TESTTMP/hgcache/master/packs/077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histpack
+  $TESTTMP/hgcache/master/packs/935861cae0be6ce41a0d47a529e4d097e9e68a69.dataidx
+  $TESTTMP/hgcache/master/packs/935861cae0be6ce41a0d47a529e4d097e9e68a69.datapack
+  $TESTTMP/hgcache/master/packs/repacklock
+  $TESTTMP/hgcache/repos
+
+  $ hg repack --background
+  (running background repack)
+  $ sleep 0.5
+  $ hg debugwaitonrepack >/dev/null 2>&1
+  $ find $CACHEDIR -type f | sort
+  $TESTTMP/hgcache/master/packs/094b530486dad4427a0faf6bcbc031571b99ca24.histidx
+  $TESTTMP/hgcache/master/packs/094b530486dad4427a0faf6bcbc031571b99ca24.histpack
+  $TESTTMP/hgcache/master/packs/8fe685c56f6f7edf550bfcec74eeecc5f3c2ba15.dataidx
+  $TESTTMP/hgcache/master/packs/8fe685c56f6f7edf550bfcec74eeecc5f3c2ba15.datapack
+  $TESTTMP/hgcache/master/packs/repacklock
+  $TESTTMP/hgcache/repos
+
+# Test debug commands
+
+  $ hg debugdatapack $TESTTMP/hgcache/master/packs/*.datapack
+  $TESTTMP/hgcache/master/packs/8fe685c56f6f7edf550bfcec74eeecc5f3c2ba15:
+  x:
+  Node          Delta Base    Delta Length  Blob Size
+  1bb2e6237e03  000000000000  8             8
+  d4a3ed9310e5  1bb2e6237e03  12            6
+  aee31534993a  d4a3ed9310e5  12            4
+  
+  Total:                      32            18        (77.8% bigger)
+  $ hg debugdatapack --long $TESTTMP/hgcache/master/packs/*.datapack
+  $TESTTMP/hgcache/master/packs/8fe685c56f6f7edf550bfcec74eeecc5f3c2ba15:
+  x:
+  Node                                      Delta Base                                Delta Length  Blob Size
+  1bb2e6237e035c8f8ef508e281f1ce075bc6db72  0000000000000000000000000000000000000000  8             8
+  d4a3ed9310e5bd9887e3bf779da5077efab28216  1bb2e6237e035c8f8ef508e281f1ce075bc6db72  12            6
+  aee31534993a501858fb6dd96a065671922e7d51  d4a3ed9310e5bd9887e3bf779da5077efab28216  12            4
+  
+  Total:                                                                              32            18        (77.8% bigger)
+  $ hg debugdatapack $TESTTMP/hgcache/master/packs/*.datapack --node d4a3ed9310e5bd9887e3bf779da5077efab28216
+  $TESTTMP/hgcache/master/packs/8fe685c56f6f7edf550bfcec74eeecc5f3c2ba15:
+  
+  x
+  Node                                      Delta Base                                Delta SHA1                                Delta Length
+  d4a3ed9310e5bd9887e3bf779da5077efab28216  1bb2e6237e035c8f8ef508e281f1ce075bc6db72  77029ab56e83ea2115dd53ff87483682abe5d7ca  12
+  Node                                      Delta Base                                Delta SHA1                                Delta Length
+  1bb2e6237e035c8f8ef508e281f1ce075bc6db72  0000000000000000000000000000000000000000  7ca8c71a64f7b56380e77573da2f7a5fdd2ecdb5  8
+  $ hg debughistorypack $TESTTMP/hgcache/master/packs/*.histidx
+  
+  x
+  Node          P1 Node       P2 Node       Link Node     Copy From
+  1bb2e6237e03  d4a3ed9310e5  000000000000  0b03bbc9e1e7  
+  d4a3ed9310e5  aee31534993a  000000000000  421535db10b6  
+  aee31534993a  1406e7411862  000000000000  a89d614e2364  
+  1406e7411862  000000000000  000000000000  b292c1e3311f  
+
+# Test copy tracing from a pack
+  $ cd ../master
+  $ hg mv x y
+  $ hg commit -m 'move x to y'
+  $ cd ../shallow
+  $ hg pull -q
+  $ hg up -q tip
+  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over * (glob)
+  $ hg repack
+  $ hg log -f y -T '{desc}\n'
+  move x to y
+  x4
+  x3
+  x2
+  x
+
+# Test copy trace across rename and back
+  $ cp -R $TESTTMP/hgcache/master/packs $TESTTMP/backuppacks
+  $ cd ../master
+  $ hg mv y x
+  $ hg commit -m 'move y back to x'
+  $ hg revert -r 0 x
+  $ mv x y
+  $ hg add y
+  $ echo >> y
+  $ hg revert x
+  $ hg commit -m 'add y back without metadata'
+  $ cd ../shallow
+  $ hg pull -q
+  $ hg up -q tip
+  2 files fetched over 2 fetches - (2 misses, 0.00% hit ratio) over * (glob)
+  $ hg repack
+  $ ls $TESTTMP/hgcache/master/packs
+  e8fdf7ae22b772dcc291f905b9c6e5f381d28739.dataidx
+  e8fdf7ae22b772dcc291f905b9c6e5f381d28739.datapack
+  ebbd7411e00456c0eec8d1150a77e2b3ef490f3f.histidx
+  ebbd7411e00456c0eec8d1150a77e2b3ef490f3f.histpack
+  repacklock
+  $ hg debughistorypack $TESTTMP/hgcache/master/packs/*.histidx
+  
+  x
+  Node          P1 Node       P2 Node       Link Node     Copy From
+  cd410a44d584  577959738234  000000000000  609547eda446  y
+  1bb2e6237e03  d4a3ed9310e5  000000000000  0b03bbc9e1e7  
+  d4a3ed9310e5  aee31534993a  000000000000  421535db10b6  
+  aee31534993a  1406e7411862  000000000000  a89d614e2364  
+  1406e7411862  000000000000  000000000000  b292c1e3311f  
+  
+  y
+  Node          P1 Node       P2 Node       Link Node     Copy From
+  577959738234  1bb2e6237e03  000000000000  c7faf2fc439a  x
+  21f46f2721e7  000000000000  000000000000  d6868642b790  
+  $ hg strip -r '.^'
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/609547eda446-b26b56a8-backup.hg (glob)
+  $ hg -R ../master strip -r '.^'
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  saved backup bundle to $TESTTMP/master/.hg/strip-backup/609547eda446-b26b56a8-backup.hg (glob)
+
+  $ rm -rf $TESTTMP/hgcache/master/packs
+  $ cp -R $TESTTMP/backuppacks $TESTTMP/hgcache/master/packs
+
+# Test repacking datapack without history
+  $ rm -rf $CACHEDIR/master/packs/*hist*
+  $ hg repack
+  $ hg debugdatapack $TESTTMP/hgcache/master/packs/*.datapack
+  $TESTTMP/hgcache/master/packs/a8d86ff8e1a11a77a85f5fea567f56a757583eda:
+  x:
+  Node          Delta Base    Delta Length  Blob Size
+  1bb2e6237e03  000000000000  8             8
+  d4a3ed9310e5  1bb2e6237e03  12            6
+  aee31534993a  d4a3ed9310e5  12            4
+  
+  Total:                      32            18        (77.8% bigger)
+  y:
+  Node          Delta Base    Delta Length  Blob Size
+  577959738234  000000000000  70            8
+  
+  Total:                      70            8         (775.0% bigger)
+
+  $ hg cat -r ".^" x
+  x
+  x
+  x
+  x
+
+Incremental repack
+  $ rm -rf $CACHEDIR/master/packs/*
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > data.generations=60
+  >   150
+  > fetchpacks=True
+  > EOF
+
+Single pack - repack does nothing
+  $ hg prefetch -r 0
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep datapack
+  -r--r--r--      59 5b7dec902026f0cddb0ef8acb62f27b5698494d4.datapack
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep histpack
+  -r--r--r--      90 c3399b56e035f73c3295276ed098235a08a0ed8c.histpack
+  $ hg repack --incremental
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep datapack
+  -r--r--r--      59 5b7dec902026f0cddb0ef8acb62f27b5698494d4.datapack
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep histpack
+  -r--r--r--      90 c3399b56e035f73c3295276ed098235a08a0ed8c.histpack
+
+3 gen1 packs, 1 gen0 pack - packs 3 gen1 into 1
+  $ hg prefetch -r 1
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ hg prefetch -r 2
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ hg prefetch -r 3
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep datapack
+  -r--r--r--      59 5b7dec902026f0cddb0ef8acb62f27b5698494d4.datapack
+  -r--r--r--      65 6c499d21350d79f92fd556b4b7a902569d88e3c9.datapack
+  -r--r--r--      61 817d294043bd21a3de01f807721971abe45219ce.datapack
+  -r--r--r--      63 ff45add45ab3f59c4f75efc6a087d86c821219d6.datapack
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep histpack
+  -r--r--r--     254 077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histpack
+  -r--r--r--     336 094b530486dad4427a0faf6bcbc031571b99ca24.histpack
+  -r--r--r--     172 276d308429d0303762befa376788300f0310f90e.histpack
+  -r--r--r--      90 c3399b56e035f73c3295276ed098235a08a0ed8c.histpack
+
+For the data packs, setting the limit for the repackmaxpacksize to be 64 such
+that data pack with size 65 is more than the limit. This effectively ensures
+that no generation has 3 packs and therefore, no packs are chosen for the
+incremental repacking. As for the history packs, setting repackmaxpacksize to be
+0 which should always result in no repacking.
+  $ hg repack --incremental --config remotefilelog.data.repackmaxpacksize=64 \
+  > --config remotefilelog.history.repackmaxpacksize=0
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep datapack
+  -r--r--r--      59 5b7dec902026f0cddb0ef8acb62f27b5698494d4.datapack
+  -r--r--r--      65 6c499d21350d79f92fd556b4b7a902569d88e3c9.datapack
+  -r--r--r--      61 817d294043bd21a3de01f807721971abe45219ce.datapack
+  -r--r--r--      63 ff45add45ab3f59c4f75efc6a087d86c821219d6.datapack
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep histpack
+  -r--r--r--     254 077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histpack
+  -r--r--r--     336 094b530486dad4427a0faf6bcbc031571b99ca24.histpack
+  -r--r--r--     172 276d308429d0303762befa376788300f0310f90e.histpack
+  -r--r--r--      90 c3399b56e035f73c3295276ed098235a08a0ed8c.histpack
+
+Setting limit for the repackmaxpacksize to be the size of the biggest pack file
+which ensures that it is effectively ignored in the incremental repacking.
+  $ hg repack --incremental --config remotefilelog.data.repackmaxpacksize=65 \
+  > --config remotefilelog.history.repackmaxpacksize=336
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep datapack
+  -r--r--r--      59 5b7dec902026f0cddb0ef8acb62f27b5698494d4.datapack
+  -r--r--r--     225 8fe685c56f6f7edf550bfcec74eeecc5f3c2ba15.datapack
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep histpack
+  -r--r--r--     336 094b530486dad4427a0faf6bcbc031571b99ca24.histpack
+
+1 gen3 pack, 1 gen0 pack - does nothing
+  $ hg repack --incremental
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep datapack
+  -r--r--r--      59 5b7dec902026f0cddb0ef8acb62f27b5698494d4.datapack
+  -r--r--r--     225 8fe685c56f6f7edf550bfcec74eeecc5f3c2ba15.datapack
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep histpack
+  -r--r--r--     336 094b530486dad4427a0faf6bcbc031571b99ca24.histpack
+
+Pull should run background repack
+  $ cat >> .hg/hgrc <<EOF
+  > [remotefilelog]
+  > backgroundrepack=True
+  > EOF
+  $ clearcache
+  $ hg prefetch -r 0
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ hg prefetch -r 1
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ hg prefetch -r 2
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ hg prefetch -r 3
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep datapack
+  -r--r--r--      59 5b7dec902026f0cddb0ef8acb62f27b5698494d4.datapack
+  -r--r--r--      65 6c499d21350d79f92fd556b4b7a902569d88e3c9.datapack
+  -r--r--r--      61 817d294043bd21a3de01f807721971abe45219ce.datapack
+  -r--r--r--      63 ff45add45ab3f59c4f75efc6a087d86c821219d6.datapack
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep histpack
+  -r--r--r--     254 077e7ce5dfe862dc40cc8f3c9742d96a056865f2.histpack
+  -r--r--r--     336 094b530486dad4427a0faf6bcbc031571b99ca24.histpack
+  -r--r--r--     172 276d308429d0303762befa376788300f0310f90e.histpack
+  -r--r--r--      90 c3399b56e035f73c3295276ed098235a08a0ed8c.histpack
+
+  $ hg pull
+  pulling from ssh://user@dummy/master
+  searching for changes
+  no changes found
+  (running background incremental repack)
+  $ sleep 0.5
+  $ hg debugwaitonrepack >/dev/null 2>&1
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep datapack
+  -r--r--r--      59 5b7dec902026f0cddb0ef8acb62f27b5698494d4.datapack
+  -r--r--r--     225 8fe685c56f6f7edf550bfcec74eeecc5f3c2ba15.datapack
+  $ ls_l $TESTTMP/hgcache/master/packs/ | grep histpack
+  -r--r--r--     336 094b530486dad4427a0faf6bcbc031571b99ca24.histpack
+
+Test environment variable resolution
+  $ CACHEPATH=$TESTTMP/envcache hg prefetch --config 'remotefilelog.cachepath=$CACHEPATH'
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ find $TESTTMP/envcache | sort
+  $TESTTMP/envcache
+  $TESTTMP/envcache/master
+  $TESTTMP/envcache/master/packs
+  $TESTTMP/envcache/master/packs/54afbfda203716c1aa2636029ccc0df18165129e.dataidx
+  $TESTTMP/envcache/master/packs/54afbfda203716c1aa2636029ccc0df18165129e.datapack
+  $TESTTMP/envcache/master/packs/dcebd8e8d4d97ee88e40dd8f92d8678c10e1a3ad.histidx
+  $TESTTMP/envcache/master/packs/dcebd8e8d4d97ee88e40dd8f92d8678c10e1a3ad.histpack
+
+Test local remotefilelog blob is correct when based on a pack
+  $ hg prefetch -r .
+  1 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ echo >> y
+  $ hg commit -m y2
+  $ hg debugremotefilelog .hg/store/data/95cb0bfd2977c761298d9624e4b4d4c72a39974a/b70860edba4f8242a1d52f2a94679dd23cb76808
+  size: 9 bytes
+  path: .hg/store/data/95cb0bfd2977c761298d9624e4b4d4c72a39974a/b70860edba4f8242a1d52f2a94679dd23cb76808 
+  key: b70860edba4f 
+  
+          node =>           p1            p2      linknode     copyfrom
+  b70860edba4f => 577959738234  000000000000  08d3fbc98c48  
+  577959738234 => 1bb2e6237e03  000000000000  c7faf2fc439a  x
+  1bb2e6237e03 => d4a3ed9310e5  000000000000  0b03bbc9e1e7  
+  d4a3ed9310e5 => aee31534993a  000000000000  421535db10b6  
+  aee31534993a => 1406e7411862  000000000000  a89d614e2364  
+  1406e7411862 => 000000000000  000000000000  b292c1e3311f  
+
+Test limiting the max delta chain length
+  $ hg repack --config packs.maxchainlen=1
+  $ hg debugdatapack $TESTTMP/hgcache/master/packs/*.dataidx
+  $TESTTMP/hgcache/master/packs/a2731c9a16403457b67337a620931797fce8c821:
+  x:
+  Node          Delta Base    Delta Length  Blob Size
+  1bb2e6237e03  000000000000  8             8
+  d4a3ed9310e5  1bb2e6237e03  12            6
+  aee31534993a  000000000000  4             4
+  1406e7411862  aee31534993a  12            2
+  
+  Total:                      36            20        (80.0% bigger)
+  y:
+  Node          Delta Base    Delta Length  Blob Size
+  577959738234  000000000000  8             8
+  
+  Total:                      8             8         (0.0% bigger)
+
+Test huge pack cleanup using different values of packs.maxpacksize:
+  $ hg repack --incremental --debug
+  $ hg repack --incremental --debug --config packs.maxpacksize=512
+  removing oversize packfile $TESTTMP/hgcache/master/packs/a2731c9a16403457b67337a620931797fce8c821.datapack (365 bytes)
+  removing oversize packfile $TESTTMP/hgcache/master/packs/a2731c9a16403457b67337a620931797fce8c821.dataidx (1.21 KB)
+
+Do a repack where the new pack reuses a delta from the old pack
+  $ clearcache
+  $ hg prefetch -r '2::3'
+  2 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ hg repack
+  $ hg debugdatapack $CACHEDIR/master/packs/*.datapack
+  $TESTTMP/hgcache/master/packs/abf210f6c3aa4dd0ecc7033633ad73591be16c95:
+  x:
+  Node          Delta Base    Delta Length  Blob Size
+  1bb2e6237e03  000000000000  8             8
+  d4a3ed9310e5  1bb2e6237e03  12            6
+  
+  Total:                      20            14        (42.9% bigger)
+  $ hg prefetch -r '0::1'
+  2 files fetched over 1 fetches - (0 misses, 100.00% hit ratio) over * (glob)
+  $ hg repack
+  $ hg debugdatapack $CACHEDIR/master/packs/*.datapack
+  $TESTTMP/hgcache/master/packs/09b8bf49256b3fc2175977ba97d6402e91a9a604:
+  x:
+  Node          Delta Base    Delta Length  Blob Size
+  1bb2e6237e03  000000000000  8             8
+  d4a3ed9310e5  1bb2e6237e03  12            6
+  aee31534993a  d4a3ed9310e5  12            4
+  1406e7411862  aee31534993a  12            2
+  
+  Total:                      44            20        (120.0% bigger)