rust-index: using the `hg::index::Index` in ancestors iterator and lazy set
Since there is no Rust implementation for REVLOGV2/CHANGELOGv2, we declare
them to be incompatible with Rust, hence indexes in these formats will use
the implementations from Python `mercurial.ancestor`. If this is an unacceptable
performance hit for current users of these formats, we can later on add Rust
implementations based on the C index for them or implement these formats for
the Rust indexes.
Among the challenges that we had to meet, we wanted to avoid taking the GIL each
time the inner (vcsgraph) iterator has to call the parents function. This would probably
still be acceptable in terms of performance with `AncestorsIterator`, but not with
`LazyAncestors` nor for the upcoming change in `MissingAncestors`.
Hence we enclose the reference to the index in a `PySharedRef`, leading to more
rigourous checking of mutations, which does pass now that there no logically immutable
methods of `hg::index::Index` that take a mutable reference as input.
Tests for experimental.removeemptydirs
$ cat >> pwd.py << EOF
> import os
> try:
> print(os.getcwd())
> except OSError:
> print("<directory is no longer accessible>")
> EOF
$ NO_RM=--config=experimental.removeemptydirs=0
$ DO_RM=--config=experimental.removeemptydirs=1
$ isdir() { if [ -d $1 ]; then echo yes; else echo no; fi }
$ isfile() { if [ -f $1 ]; then echo yes; else echo no; fi }
`hg rm` of the last file in a directory:
$ hg init hgrm
$ cd hgrm
$ mkdir somedir
$ echo hi > somedir/foo
$ hg ci -qAm foo
$ isdir somedir
yes
$ hg rm somedir/foo
$ isdir somedir
no
$ hg revert -qa
$ isdir somedir
yes
$ hg $NO_RM rm somedir/foo
$ isdir somedir
yes
$ ls somedir
$ cd $TESTTMP
`hg mv` of the last file in a directory:
$ hg init hgmv
$ cd hgmv
$ mkdir somedir
$ mkdir destdir
$ echo hi > somedir/foo
$ hg ci -qAm foo
$ isdir somedir
yes
$ hg mv somedir/foo destdir/foo
$ isdir somedir
no
$ hg revert -qa
(revert doesn't get rid of destdir/foo?)
$ rm destdir/foo
$ isdir somedir
yes
$ hg $NO_RM mv somedir/foo destdir/foo
$ isdir somedir
yes
$ ls somedir
$ cd $TESTTMP
Updating to a commit that doesn't have the directory:
$ hg init hgupdate
$ cd hgupdate
$ echo hi > r0
$ hg ci -qAm r0
$ mkdir somedir
$ echo hi > somedir/foo
$ hg ci -qAm r1
$ isdir somedir
yes
$ hg co -q -r ".^"
$ isdir somedir
no
$ hg co -q tip
$ isdir somedir
yes
$ hg $NO_RM co -q -r ".^"
$ isdir somedir
yes
$ ls somedir
$ cd $TESTTMP
Rebasing across a commit that doesn't have the directory, from inside the
directory:
$ hg init hgrebase
$ cd hgrebase
$ echo hi > r0
$ hg ci -qAm r0
$ mkdir somedir
$ echo hi > somedir/foo
$ hg ci -qAm first_rebase_source
$ hg $NO_RM co -q -r ".^"
$ echo hi > somedir/bar
$ hg ci -qAm first_rebase_dest
$ hg $NO_RM co -q -r ".^"
$ echo hi > somedir/baz
$ hg ci -qAm second_rebase_dest
$ hg co -qr 'desc(first_rebase_source)'
$ cd $TESTTMP/hgrebase/somedir
$ hg --config extensions.rebase= rebase -qr . -d 'desc(first_rebase_dest)'
current directory was removed (rmcwd !)
(consider changing to repo root: $TESTTMP/hgrebase) (rmcwd !)
$ cd $TESTTMP/hgrebase/somedir
(The current node is the rebased first_rebase_source on top of
first_rebase_dest)
This should not output anything about current directory being removed:
$ hg $NO_RM --config extensions.rebase= rebase -qr . -d 'desc(second_rebase_dest)'
$ cd $TESTTMP
Histediting across a commit that doesn't have the directory, from inside the
directory (reordering nodes):
A directory with the right pass exists at the end of the run, but it is a
different directory than the current one.
Windows is not affected
$ hg init hghistedit
$ cd hghistedit
$ echo hi > r0
$ hg ci -qAm r0
$ echo hi > r1
$ hg ci -qAm r1
$ echo hi > r2
$ hg ci -qAm r2
$ mkdir somedir
$ echo hi > somedir/foo
$ hg ci -qAm migrating_revision
$ cat > histedit_commands <<EOF
> pick 89079fab8aee 0 r0
> pick e6d271df3142 1 r1
> pick 89e25aa83f0f 3 migrating_revision
> pick b550aa12d873 2 r2
> EOF
$ cd $TESTTMP/hghistedit/somedir
$ hg $DO_RM --config extensions.histedit= histedit -q --commands ../histedit_commands
current directory was removed (no-windows !)
(consider changing to repo root: $TESTTMP/hghistedit) (no-windows !)
$ ls -A $TESTTMP/hghistedit/
.hg
histedit_commands
r0
r1
r2
somedir
#if windows
$ "$PYTHON" "$TESTTMP/pwd.py"
$TESTTMP/hghistedit/somedir
$ ls -A $TESTTMP/hghistedit/somedir
foo
$ ls -A
foo
#else
$ echo ${PWD} # no-pwd-check
$TESTTMP/hghistedit/somedir
$ "$PYTHON" "$TESTTMP/pwd.py"
<directory is no longer accessible>
$ ls -A $TESTTMP/hghistedit/somedir
foo
$ ls -A || true
ls: .: $ENOENT$ (?)
#endif
Get out of the doomed directory
$ cd $TESTTMP/hghistedit
chdir: error retrieving current directory: getcwd: cannot access parent directories: $ENOENT$ (?)
$ hg files --rev . | grep somedir/
somedir/foo
$ cat > histedit_commands <<EOF
> pick 89079fab8aee 0 r0
> pick 7c7a22c6009f 3 migrating_revision
> pick e6d271df3142 1 r1
> pick 40a53c2d4276 2 r2
> EOF
$ cd $TESTTMP/hghistedit/somedir
$ hg $NO_RM --config extensions.histedit= histedit -q --commands ../histedit_commands
Regardless of system, we should always get a 'yes' here.
$ isfile foo
yes
$ cd $TESTTMP
This is essentially the exact test from issue5826, just cleaned up a little:
$ hg init issue5826_withrm
$ cd issue5826_withrm
Let's only turn this on for this repo so that we don't contaminate later tests.
$ cat >> .hg/hgrc <<EOF
> [extensions]
> histedit =
> EOF
Commit three revisions that each create a directory:
$ mkdir foo
$ touch foo/bar
$ hg commit -qAm "add foo"
$ mkdir bar
$ touch bar/bar
$ hg commit -qAm "add bar"
$ mkdir baz
$ touch baz/bar
$ hg commit -qAm "add baz"
Enter the first directory:
$ cd foo
Histedit doing 'pick, pick, fold':
#if rmcwd
$ hg histedit --commands - <<EOF
> pick 6274c77c93c3 1 add bar
> pick ff70a87b588f 0 add foo
> fold 9992bb0ac0db 2 add baz
> EOF
current directory was removed
(consider changing to repo root: $TESTTMP/issue5826_withrm)
abort: $ENOENT$
[255]
Go back to the repo root after losing it as part of that operation:
$ cd $TESTTMP/issue5826_withrm
Note the lack of a non-zero exit code from this function - it exits
successfully, but doesn't really do anything.
$ hg histedit --continue
9992bb0ac0db: cannot fold - working copy is not a descendant of previous commit 5c806432464a
saved backup bundle to $TESTTMP/issue5826_withrm/.hg/strip-backup/ff70a87b588f-e94f9789-histedit.hg
$ hg log -T '{rev}:{node|short} {desc}\n'
2:94e3f9fae1d6 fold-temp-revision 9992bb0ac0db
1:5c806432464a add foo
0:d17db4b0303a add bar
#else
$ cd $TESTTMP/issue5826_withrm
$ hg histedit --commands - <<EOF
> pick 6274c77c93c3 1 add bar
> pick ff70a87b588f 0 add foo
> fold 9992bb0ac0db 2 add baz
> EOF
saved backup bundle to $TESTTMP/issue5826_withrm/.hg/strip-backup/5c806432464a-cd4c8d86-histedit.hg
$ hg log -T '{rev}:{node|short} {desc}\n'
1:b9eddaa97cbc add foo
***
add baz
0:d17db4b0303a add bar
#endif
Now test that again with experimental.removeemptydirs=false:
$ hg init issue5826_norm
$ cd issue5826_norm
Let's only turn this on for this repo so that we don't contaminate later tests.
$ cat >> .hg/hgrc <<EOF
> [extensions]
> histedit =
> [experimental]
> removeemptydirs = false
> EOF
Commit three revisions that each create a directory:
$ mkdir foo
$ touch foo/bar
$ hg commit -qAm "add foo"
$ mkdir bar
$ touch bar/bar
$ hg commit -qAm "add bar"
$ mkdir baz
$ touch baz/bar
$ hg commit -qAm "add baz"
Enter the first directory:
$ cd foo
Histedit doing 'pick, pick, fold':
$ hg histedit --commands - <<EOF
> pick 6274c77c93c3 1 add bar
> pick ff70a87b588f 0 add foo
> fold 9992bb0ac0db 2 add baz
> EOF
saved backup bundle to $TESTTMP/issue5826_withrm/issue5826_norm/.hg/strip-backup/5c806432464a-cd4c8d86-histedit.hg
Note the lack of a 'cd' being necessary here, and we don't need to 'histedit
--continue'
$ hg log -T '{rev}:{node|short} {desc}\n'
1:b9eddaa97cbc add foo
***
add baz
0:d17db4b0303a add bar
$ cd $TESTTMP