Mercurial > hg-stable
view tests/test-issue3084.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 | 495bc1b65d25 |
children |
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$ echo "[extensions]" >> $HGRCPATH $ echo "largefiles =" >> $HGRCPATH Create the repository outside $HOME since largefiles write to $HOME/.cache/largefiles. $ hg init test $ cd test $ echo "root" > root $ hg add root $ hg commit -m "Root commit" --config extensions.largefiles=! Ensure that .hg/largefiles isn't created before largefiles are added #if unix-permissions $ chmod 555 .hg #endif $ hg status #if unix-permissions $ chmod 755 .hg #endif $ test -f .hg/largefiles [1] $ echo "large" > foo $ hg add --large foo $ hg commit -m "Add foo as a largefile" $ hg update -r 0 getting changed largefiles 0 largefiles updated, 1 removed 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ echo "normal" > foo $ hg add foo $ hg commit -m "Add foo as normal file" created new head Normal file in the working copy, keeping the normal version: $ echo "n" | hg merge --config ui.interactive=Yes remote turned local normal file foo into a largefile use (l)argefile or keep (n)ormal file? n 0 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg status $ cat foo normal Normal file in the working copy, keeping the largefile version: $ hg update -q -C $ echo "l" | hg merge --config ui.interactive=Yes remote turned local normal file foo into a largefile use (l)argefile or keep (n)ormal file? l getting changed largefiles 1 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg status M foo $ hg diff --nodates diff -r fa129ab6b5a7 .hglf/foo --- /dev/null +++ b/.hglf/foo @@ -0,0 +1,1 @@ +7f7097b041ccf68cc5561e9600da4655d21c6d18 diff -r fa129ab6b5a7 foo --- a/foo +++ /dev/null @@ -1,1 +0,0 @@ -normal $ cat foo large Largefile in the working copy, keeping the normal version: $ hg update -q -C -r 1 $ echo "n" | hg merge --config ui.interactive=Yes remote turned local largefile foo into a normal file keep (l)argefile or use (n)ormal file? n getting changed largefiles 0 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg status M foo $ hg diff --nodates diff -r ff521236428a .hglf/foo --- a/.hglf/foo +++ /dev/null @@ -1,1 +0,0 @@ -7f7097b041ccf68cc5561e9600da4655d21c6d18 diff -r ff521236428a foo --- /dev/null +++ b/foo @@ -0,0 +1,1 @@ +normal $ cat foo normal Largefile in the working copy, keeping the largefile version: $ hg update -q -C -r 1 $ echo "l" | hg merge --config ui.interactive=Yes remote turned local largefile foo into a normal file keep (l)argefile or use (n)ormal file? l 0 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg status $ cat foo large Whatever ... commit something so we can invoke merge when updating $ hg commit -m '3: Merge' Updating from largefile to normal - no reason to prompt $ hg up -r 2 getting changed largefiles 0 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ cat foo normal (the update above used to leave the working dir in a very weird state - clean it $ hg up -qr null $ hg up -qr 2 ) Updating from normal to largefile - no reason to prompt $ hg up -r 3 getting changed largefiles 1 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ cat foo large $ cd .. Systematic testing of merges involving largefiles: Ancestor: normal Parent: normal-id Parent: large result: large Ancestor: normal Parent: normal2 Parent: large result: ? Ancestor: large Parent: large-id Parent: normal result: normal Ancestor: large Parent: large2 Parent: normal result: ? All cases should try merging both ways. Prepare test repo: $ hg init merges $ cd merges prepare cases with "normal" ancestor: $ hg up -qr null $ echo normal > f $ hg ci -Aqm "normal-ancestor" $ hg tag -l "normal-ancestor" $ touch f2 $ hg ci -Aqm "normal-id" $ hg tag -l "normal-id" $ echo normal2 > f $ hg ci -m "normal2" $ hg tag -l "normal2" $ echo normal > f $ hg ci -Aqm "normal-same" $ hg tag -l "normal-same" $ hg up -qr "normal-ancestor" $ hg rm f $ echo large > f $ hg add --large f $ hg ci -qm "large" $ hg tag -l "large" prepare cases with "large" ancestor: $ hg up -qr null $ echo large > f $ hg add --large f $ hg ci -qm "large-ancestor" $ hg tag -l "large-ancestor" $ touch f2 $ hg ci -Aqm "large-id" $ hg tag -l "large-id" $ echo large2 > f $ hg ci -m "large2" $ hg tag -l "large2" $ echo large > f $ hg ci -Aqm "large-same" $ hg tag -l "large-same" $ hg up -qr "large-ancestor" $ hg rm f $ echo normal > f $ hg ci -qAm "normal" $ hg tag -l "normal" $ hg log -GT '{tags}' @ normal tip | | o large-same | | | o large2 | | | o large-id |/ o large-ancestor o large | | o normal-same | | | o normal2 | | | o normal-id |/ o normal-ancestor Ancestor: normal Parent: normal-id Parent: large result: large $ hg up -Cqr normal-id $ hg merge -r large getting changed largefiles 1 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f large swap $ hg up -Cqr large $ hg merge -r normal-id 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f large Ancestor: normal Parent: normal-same Parent: large result: large $ hg up -Cqr normal-same $ hg merge -r large getting changed largefiles 1 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f large swap $ hg up -Cqr large $ hg merge -r normal-same 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f large Ancestor: normal Parent: normal2 Parent: large result: ? (annoying extra prompt ... but it do not do any serious harm) $ hg up -Cqr normal2 $ hg merge -r large remote turned local normal file f into a largefile use (l)argefile or keep (n)ormal file? l getting changed largefiles 1 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f large $ hg up -Cqr normal2 $ echo n | hg merge -r large --config ui.interactive=Yes remote turned local normal file f into a largefile use (l)argefile or keep (n)ormal file? n 0 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f normal2 swap $ hg up -Cqr large $ hg merge -r normal2 remote turned local largefile f into a normal file keep (l)argefile or use (n)ormal file? l 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f large $ hg up -Cqr large $ echo n | hg merge -r normal2 --config ui.interactive=Yes remote turned local largefile f into a normal file keep (l)argefile or use (n)ormal file? n getting changed largefiles 0 largefiles updated, 0 removed 2 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f normal2 Ancestor: large Parent: large-id Parent: normal result: normal $ hg up -Cqr large-id $ hg merge -r normal getting changed largefiles 0 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f normal swap $ hg up -Cqr normal $ hg merge -r large-id 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f normal Ancestor: large Parent: large-same Parent: normal result: normal $ hg up -Cqr large-same $ hg merge -r normal getting changed largefiles 0 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f normal swap $ hg up -Cqr normal $ hg merge -r large-same 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f normal Ancestor: large Parent: large2 Parent: normal result: ? (annoying extra prompt ... but it do not do any serious harm) $ hg up -Cqr large2 $ hg merge -r normal remote turned local largefile f into a normal file keep (l)argefile or use (n)ormal file? l 0 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f large2 $ hg up -Cqr large2 $ echo n | hg merge -r normal --config ui.interactive=Yes remote turned local largefile f into a normal file keep (l)argefile or use (n)ormal file? n getting changed largefiles 0 largefiles updated, 0 removed 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f normal swap $ hg up -Cqr normal $ hg merge -r large2 remote turned local normal file f into a largefile use (l)argefile or keep (n)ormal file? l getting changed largefiles 1 largefiles updated, 0 removed 2 files updated, 0 files merged, 1 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f large2 $ hg up -Cqr normal $ echo n | hg merge -r large2 --config ui.interactive=Yes remote turned local normal file f into a largefile use (l)argefile or keep (n)ormal file? n 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f normal $ cd ..