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
$ PYTHONPATH=$TESTDIR/..:$PYTHONPATH
$ export PYTHONPATH
$ . "$TESTDIR/remotefilelog-library.sh"
$ cat >> $HGRCPATH <<EOF
> [remotefilelog]
> fastdatapack=True
> EOF
$ 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
$ 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
$ 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
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