exchangev2: use filesdata
filesdata is a more efficient mechanism for bulk fetching files data for a
range of changesets. Let's use it in exchangev2.
With this change, a client performing a full clone of mozilla-unified
transmits substantially fewer bytes across the wire:
before: 139,124,863 bytes sent
after: 20,522,499 bytes sent
The bulk of the remaining bytes is likely the transfer of ~1M nodes for
changesets and manifests. We can eliminate this by making requests in
terms of node ranges instead of explicit node lists...
Differential Revision: https://phab.mercurial-scm.org/D4982
Create user cache directory
$ USERCACHE=`pwd`/cache; export USERCACHE
$ cat <<EOF >> ${HGRCPATH}
> [extensions]
> hgext.largefiles=
> [largefiles]
> usercache=${USERCACHE}
> EOF
$ mkdir -p ${USERCACHE}
Create source repo, and commit adding largefile.
$ hg init src
$ cd src
$ echo large > large
$ hg add --large large
$ hg commit -m 'add largefile'
$ hg rm large
$ hg commit -m 'branchhead without largefile' large
$ hg up -qr 0
$ rm large
$ echo "0000000000000000000000000000000000000000" > .hglf/large
$ hg commit -m 'commit missing file with corrupt standin' large
abort: large: file not found!
[255]
$ hg up -Cqr 0
$ cd ..
Discard all cached largefiles in USERCACHE
$ rm -rf ${USERCACHE}
Create mirror repo, and pull from source without largefile:
"pull" is used instead of "clone" for suppression of (1) updating to
tip (= caching largefile from source repo), and (2) recording source
repo as "default" path in .hg/hgrc.
$ hg init mirror
$ cd mirror
$ hg pull ../src
pulling from ../src
requesting all changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 1 changes to 1 files
new changesets eb85d9124f3f:26c18ce05e4e
(run 'hg update' to get a working copy)
Update working directory to "tip", which requires largefile("large"),
but there is no cache file for it. So, hg must treat it as
"missing"(!) file.
$ hg update -r0
getting changed largefiles
large: largefile 7f7097b041ccf68cc5561e9600da4655d21c6d18 not available from file:/*/$TESTTMP/mirror (glob)
0 largefiles updated, 0 removed
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg status
! large
Update working directory to null: this cleanup .hg/largefiles/dirstate
$ hg update null
getting changed largefiles
0 largefiles updated, 0 removed
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
Update working directory to tip, again.
$ hg update -r0
getting changed largefiles
large: largefile 7f7097b041ccf68cc5561e9600da4655d21c6d18 not available from file:/*/$TESTTMP/mirror (glob)
0 largefiles updated, 0 removed
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg status
! large
$ cd ..
Verify that largefiles from pulled branchheads are fetched, also to an empty repo
$ hg init mirror2
$ hg -R mirror2 pull src -r0
pulling from src
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
new changesets eb85d9124f3f
(run 'hg update' to get a working copy)
#if unix-permissions
Portable way to print file permissions:
$ cat > ls-l.py <<EOF
> #!$PYTHON
> from __future__ import absolute_import, print_function
> import os
> import sys
> path = sys.argv[1]
> print('%03o' % (os.lstat(path).st_mode & 0o777))
> EOF
$ chmod +x ls-l.py
Test that files in .hg/largefiles inherit mode from .hg/store, not
from file in working copy:
$ cd src
$ chmod 750 .hg/store
$ chmod 660 large
$ echo change >> large
$ hg commit -m change
created new head
$ ../ls-l.py .hg/largefiles/e151b474069de4ca6898f67ce2f2a7263adf8fea
640
Test permission of with files in .hg/largefiles created by update:
$ cd ../mirror
$ rm -r "$USERCACHE" .hg/largefiles # avoid links
$ chmod 750 .hg/store
$ hg pull ../src --update -q
$ ../ls-l.py .hg/largefiles/e151b474069de4ca6898f67ce2f2a7263adf8fea
640
Test permission of files created by push:
$ hg serve -R ../src -d -p $HGPORT --pid-file hg.pid \
> --config "web.allow_push=*" --config web.push_ssl=no
$ cat hg.pid >> $DAEMON_PIDS
$ echo change >> large
$ hg commit -m change
$ rm -r "$USERCACHE"
$ hg push -q http://localhost:$HGPORT/
$ ../ls-l.py ../src/.hg/largefiles/b734e14a0971e370408ab9bce8d56d8485e368a9
640
$ cd ..
#endif
Test issue 4053 (remove --after on a deleted, uncommitted file shouldn't say
it is missing, but a remove on a nonexistent unknown file still should. Same
for a forget.)
$ cd src
$ touch x
$ hg add x
$ mv x y
$ hg remove -A x y ENOENT
ENOENT: * (glob)
not removing y: file is untracked
[1]
$ hg add y
$ mv y z
$ hg forget y z ENOENT
ENOENT: * (glob)
not removing z: file is already untracked
[1]
Largefiles are accessible from the share's store
$ cd ..
$ hg share -q src share_dst --config extensions.share=
$ hg -R share_dst update -r0
getting changed largefiles
1 largefiles updated, 0 removed
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo modified > share_dst/large
$ hg -R share_dst ci -m modified
created new head
Only dirstate is in the local store for the share, and the largefile is in the
share source's local store. Avoid the extra largefiles added in the unix
conditional above.
$ hash=`hg -R share_dst cat share_dst/.hglf/large`
$ echo $hash
e2fb5f2139d086ded2cb600d5a91a196e76bf020
$ find share_dst/.hg/largefiles/* | sort
share_dst/.hg/largefiles/dirstate
$ find src/.hg/largefiles/* | egrep "(dirstate|$hash)" | sort
src/.hg/largefiles/dirstate
src/.hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020
Verify that backwards compatibility is maintained for old storage layout
$ mv src/.hg/largefiles/$hash share_dst/.hg/largefiles
$ hg verify --quiet --lfa -R share_dst --config largefiles.usercache=
Inject corruption into the largefiles store and see how update handles that:
$ cd src
$ hg up -qC tip
$ cat large
modified
$ rm large
$ cat .hglf/large
e2fb5f2139d086ded2cb600d5a91a196e76bf020
$ mv .hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020 ..
$ echo corruption > .hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020
$ hg up -C
getting changed largefiles
large: data corruption in $TESTTMP/src/.hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020 with hash 6a7bb2556144babe3899b25e5428123735bb1e27
0 largefiles updated, 0 removed
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to "cd24c147f45c: modified"
[12] other heads for branch "default" (re)
$ hg st
! large
? z
$ rm .hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020
#if serve
Test coverage of error handling from putlfile:
$ mkdir $TESTTMP/mirrorcache
$ hg serve -R ../mirror -d -p $HGPORT1 --pid-file hg.pid --config largefiles.usercache=$TESTTMP/mirrorcache
$ cat hg.pid >> $DAEMON_PIDS
$ hg push http://localhost:$HGPORT1 -f --config files.usercache=nocache
pushing to http://localhost:$HGPORT1/
searching for changes
abort: remotestore: could not open file $TESTTMP/src/.hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020: HTTP Error 403: ssl required
[255]
$ rm .hg/largefiles/e2fb5f2139d086ded2cb600d5a91a196e76bf020
Test coverage of 'missing from store':
$ hg serve -R ../mirror -d -p $HGPORT2 --pid-file hg.pid --config largefiles.usercache=$TESTTMP/mirrorcache --config "web.allow_push=*" --config web.push_ssl=no
$ cat hg.pid >> $DAEMON_PIDS
$ hg push http://localhost:$HGPORT2 -f --config largefiles.usercache=nocache
pushing to http://localhost:$HGPORT2/
searching for changes
abort: largefile e2fb5f2139d086ded2cb600d5a91a196e76bf020 missing from store (needs to be uploaded)
[255]
Verify that --lfrev controls which revisions are checked for largefiles to push
$ hg push http://localhost:$HGPORT2 -f --config largefiles.usercache=nocache --lfrev tip
pushing to http://localhost:$HGPORT2/
searching for changes
abort: largefile e2fb5f2139d086ded2cb600d5a91a196e76bf020 missing from store (needs to be uploaded)
[255]
$ hg push http://localhost:$HGPORT2 -f --config largefiles.usercache=nocache --lfrev null
pushing to http://localhost:$HGPORT2/
searching for changes
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 1 changes to 1 files (+1 heads)
#endif