Mercurial > hg
view tests/test-largefiles-cache.t @ 24787:9d5c27890790
largefiles: for update -C, only update largefiles when necessary
Before, a --clean update with largefiles would use the "optimization" that it
didn't read hashes from standin files before and after the update. Instead of
trusting the content of the standin files, it would rehash all the actual
largefiles that lfdirstate reported clean and update the standins that didn't
have the expected content. It could thus in some "impossible" situations
automatically recover from some "largefile got out sync with its standin"
issues (even there apparently still were weird corner cases where it could
fail). This extra checking is similar to what core --clean intentionally do
not do, and it made update --clean unbearable slow.
Usually in core Mercurial, --clean will rely on the dirstate to find the files
it should update. (It is thus intentionally possible (when trying to trick the
system or if there should be bugs) to end up in situations where --clean not
will restore the working directory content correctly.) Checking every file when
we "know" it is ok is however not an option - that would be too slow.
Instead, trust the content of the standin files. Use the same logic for --clean
as for linear updates and trust the dirstate and that our "logic" will keep
them in sync. It is much cheaper to just rehash the largefiles reported dirty
by a status walk and read all standins than to hash largefiles.
Most of the changes are just a change of indentation now when the different
kinds of updates no longer are handled that differently. Standins for added
files are however only written when doing a normal update, while deleted and
removed files only will be updated for --clean updates.
author | Mads Kiilerich <madski@unity3d.com> |
---|---|
date | Wed, 15 Apr 2015 15:22:16 -0400 |
parents | 2a3f24786d09 |
children | d881c072050a |
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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' $ hg up -qr 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 (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 (run 'hg update' to get a working copy) #if unix-permissions Portable way to print file permissions: $ cat > ls-l.py <<EOF > #!/usr/bin/env python > import sys, os > path = sys.argv[1] > print '%03o' % (os.lstat(path).st_mode & 0777) > 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