phases: large rewrite on retract boundary
The new code is still pure Python, so we still have room to going significantly
faster. However its complexity of the complex part is `O(|[min_new_draft, tip]|)` instead of
`O(|[min_draft, tip]|` which should help tremendously one repository with old
draft (like mercurial-devel or mozilla-try).
This is especially useful as the most common "retract boundary" operation
happens when we commit/rewrite new drafts or when we push new draft to a
non-publishing server. In this case, the smallest new_revs is very close to the
tip and there is very few work to do.
A few smaller optimisation could be done for these cases and will be introduced in
later changesets.
We still have iterate over large sets of roots, but this is already a great
improvement for a very small amount of work. We gather information on the
affected changeset as we go as we can put it to use in the next changesets.
This extra data collection might slowdown the `register_new` case a bit, however
for register_new, it should not really matters. The set of new nodes is either
small, so the impact is negligible, or the set of new nodes is large, and the
amount of work to do to had them will dominate the overhead the collecting
information in `changed_revs`.
As this new code compute the changes on the fly, it unlock other interesting
improvement to be done in later changeset.
$ 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 ..