context: introduce an `isintroducedafter` method and use it in copies
Right now, copy tracing make effort to not traverse the graph too much to save
performance. It uses a "limit" acting as a floor revision past which data are
no longer relevant to the current copy tracing.
However, to enforce this limit, it does a call to `filectx.rev()` and that
call can trigger a graph traversal on its own. That extra graph traversal is
unaware of the current limit and can become very expensive. That cost is
increased by the nature of work done in adjust link rev, we are not only
walking down the graph, we are also checking the affected file for each
revision we walk through. Something significantly more expensive than the walk
itself.
To work around this we need to make the `filectx` operation aware of the
current limit. The first step is to introduce a dedicated method:
`isintroducedafter`. We'll then rework that method logic to stop traversal as
soon as possible.
$ . "$TESTDIR/narrow-library.sh"
$ hg init master
$ cd master
$ mkdir dir
$ mkdir dir/src
$ cd dir/src
$ for x in `$TESTDIR/seq.py 20`; do echo $x > "f$x"; hg add "f$x"; hg commit -m "Commit src $x"; done
$ cd ..
$ mkdir tests
$ cd tests
$ for x in `$TESTDIR/seq.py 20`; do echo $x > "t$x"; hg add "t$x"; hg commit -m "Commit test $x"; done
$ cd ../../..
narrow clone a file, f10
$ hg clone --narrow ssh://user@dummy/master narrow --noupdate --include "dir/src/f10"
requesting all changes
adding changesets
adding manifests
adding file changes
added 40 changesets with 1 changes to 1 files
new changesets *:* (glob)
$ cd narrow
$ cat .hg/requires | grep -v generaldelta
dotencode
fncache
narrowhg-experimental
revlogv1
store
testonly-simplestore (reposimplestore !)
$ hg tracked
I path:dir/src/f10
$ hg update
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ find * | sort
dir
dir/src
dir/src/f10
$ cat dir/src/f10
10
$ cd ..
narrow clone a directory, tests/, except tests/t19
$ hg clone --narrow ssh://user@dummy/master narrowdir --noupdate --include "dir/tests/" --exclude "dir/tests/t19"
requesting all changes
adding changesets
adding manifests
adding file changes
added 40 changesets with 19 changes to 19 files
new changesets *:* (glob)
$ cd narrowdir
$ hg tracked
I path:dir/tests
X path:dir/tests/t19
$ hg update
19 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ find * | sort
dir
dir/tests
dir/tests/t1
dir/tests/t10
dir/tests/t11
dir/tests/t12
dir/tests/t13
dir/tests/t14
dir/tests/t15
dir/tests/t16
dir/tests/t17
dir/tests/t18
dir/tests/t2
dir/tests/t20
dir/tests/t3
dir/tests/t4
dir/tests/t5
dir/tests/t6
dir/tests/t7
dir/tests/t8
dir/tests/t9
$ cd ..
narrow clone everything but a directory (tests/)
$ hg clone --narrow ssh://user@dummy/master narrowroot --noupdate --exclude "dir/tests"
requesting all changes
adding changesets
adding manifests
adding file changes
added 40 changesets with 20 changes to 20 files
new changesets *:* (glob)
$ cd narrowroot
$ hg tracked
I path:.
X path:dir/tests
$ hg update
20 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ find * | sort
dir
dir/src
dir/src/f1
dir/src/f10
dir/src/f11
dir/src/f12
dir/src/f13
dir/src/f14
dir/src/f15
dir/src/f16
dir/src/f17
dir/src/f18
dir/src/f19
dir/src/f2
dir/src/f20
dir/src/f3
dir/src/f4
dir/src/f5
dir/src/f6
dir/src/f7
dir/src/f8
dir/src/f9
$ cd ..
Testing the --narrowspec flag to clone
$ cat >> narrowspecs <<EOF
> %include foo
> [include]
> path:dir/tests/
> path:dir/src/f12
> EOF
$ hg clone ssh://user@dummy/master specfile --narrowspec narrowspecs
reading narrowspec from '$TESTTMP/narrowspecs'
abort: cannot specify other files using '%include' in narrowspec
[255]
$ cat > narrowspecs <<EOF
> [include]
> path:dir/tests/
> path:dir/src/f12
> EOF
$ hg clone ssh://user@dummy/master specfile --narrowspec narrowspecs
reading narrowspec from '$TESTTMP/narrowspecs'
requesting all changes
adding changesets
adding manifests
adding file changes
added 40 changesets with 21 changes to 21 files
new changesets 681085829a73:26ce255d5b5d
updating to branch default
21 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd specfile
$ hg tracked
I path:dir/src/f12
I path:dir/tests
$ cd ..