view tests/test-push-warn @ 11769:ca6cebd8734e stable

dirstate: ignore symlinks when fs cannot handle them (issue1888)

When the filesystem cannot handle the executable bit, we currently
ignore it completely when looking for modified files. Similarly, it is
impossible to set or clear the bit when the filesystem ignores it.

This patch makes Mercurial treat symbolic links the same way.

Symlinks are a little different since they manifest themselves as
small files containing a filename (the symlink target). On Windows,
these files show up as regular files, and on Linux and Mac they show
up as real symlinks.

Issue1888 presents a case where the symlink files are better ignored
from the Windows side. A Linux client creates symlinks in a working
copy which is shared over a network between Linux and Windows clients.

The Samba server is helpful and defererences the symlink when the
Windows client looks at it. This means that Mercurial on the Windows
side sees file content instead of a file name in the symlink, and
hence flags the link as modified. Ignoring the change would be much
more helpful, similarly to how Mercurial does not report any changes
when executable bits are ignored in a checkout on Windows.

An initial checkout of a symbolic link on a file system that cannot
handle symbolic links will still result in a regular file containing
the target file name as its content. Sharing such a checkout with a
Linux client will not turn the file into a symlink automatically, but
'hg revert' can fix that. After the revert, the Windows client will
see the correct file content (provided by the Samba server when it
follows the link on the Linux side) and otherwise ignore the change.

Running 'hg perfstatus' 10 times gives these results:

  Before:          After:
  min: 0.544703    min: 0.546549
  med: 0.547592    med: 0.548881
  avg: 0.549146    avg: 0.548549
  max: 0.564112    max: 0.551504

The median time is increased about 0.24%.

#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "graphlog=" >> $HGRCPATH

mkdir a
cd a
hg init
echo foo > t1
hg add t1
hg commit -m "1" -d "1000000 0"

cd ..
hg clone a b

cd a
echo foo > t2
hg add t2
hg commit -m "2" -d "1000000 0"

cd ../b
echo foo > t3
hg add t3
hg commit -m "3" -d "1000000 0"

hg push ../a
hg pull ../a
hg push ../a
hg merge
hg commit -m "4" -d "1000000 0"
hg push ../a
cd ..

hg init c
cd c
for i in 0 1 2; do
    echo $i >> foo
    hg ci -Am $i -d "1000000 0"
done
cd ..

hg clone c d
cd d
for i in 0 1; do
    hg co -C $i
    echo d-$i >> foo
    hg ci -m d-$i -d "1000000 0"
done

HGMERGE=true hg merge 3
hg ci -m c-d -d "1000000 0"

hg push ../c; echo $?
hg push -r 2 ../c; echo $?
hg push -r 3 ../c; echo $?
hg push -r 3 -r 4 ../c; echo $?
hg push -f -r 3 -r 4 ../c; echo $?
hg push -r 5 ../c; echo $?
hg in ../c

echo % issue 450
hg init ../e
hg push -r 0 ../e ; echo $?
hg push -r 1 ../e ; echo $?

cd ..

echo % issue 736
hg init f
cd f
hg -q branch a
echo 0 > foo
hg -q ci -d "1000000 0" -Am 0
echo 1 > foo
hg -q ci -d "1000000 0" -m 1
hg -q up 0
echo 2 > foo
hg -q ci -d "1000000 0" -m 2
hg -q up 0
hg -q branch b
echo 3 > foo
hg -q ci -d "1000000 0" -m 3
cd ..

hg -q clone f g
cd g

echo % push on existing branch and new branch
hg -q up 1
echo 4 > foo
hg -q ci -d "1000000 0" -m 4
hg -q up 0
echo 5 > foo
hg -q branch c
hg -q ci -d "1000000 0" -m 5
hg push ../f; echo $?
hg push -r 4 -r 5 ../f; echo $?

echo % multiple new branches
hg -q branch d
echo 6 > foo
hg -q ci -d "1000000 0" -m 6
hg push ../f; echo $?
hg push -r 4 -r 6 ../f; echo $?
cd ../g

echo % fail on multiple head push
hg -q up 1
echo 7 > foo
hg -q ci -d "1000000 0" -m 7
hg push -r 4 -r 7 ../f; echo $?

echo % push replacement head on existing branches
hg -q up 3
echo 8 > foo
hg -q ci -d "1000000 0" -m 8
hg push -r 7 -r 8 ../f; echo $?

echo % merge of branch a to other branch b followed by unrelated push on branch a
hg -q up 7
HGMERGE=true hg -q merge 8
hg -q ci -d "1000000 0" -m 9
hg -q up 8
echo 10 > foo
hg -q ci -d "1000000 0" -m 10
hg push -r 9 ../f; echo $?
hg push -r 10 ../f; echo $?

echo % cheating the counting algorithm
hg -q up 9
HGMERGE=true hg -q merge 2
hg -q ci -d "1000000 0" -m 11
hg -q up 1
echo 12 > foo
hg -q ci -d "1000000 0" -m 12
hg push -r 11 -r 12 ../f; echo $?

echo % failed push of new named branch
echo 12 > foo
hg -q ci -d "1000000 0" -m 12a
hg -q up 11
echo 13 > foo
hg -q branch e
hg -q ci -d "1000000 0" -m 13d
hg push -r 12 -r 13 ../f; echo $?

echo % using --new-branch to push new named branch
hg push --new-branch -r 12 -r 13 ../f; echo $?

echo % checking prepush logic does not allow silently pushing multiple new heads
cd ..
hg init h
echo init > h/init
hg -R h ci -Am init
echo a > h/a
hg -R h ci -Am a
hg clone h i
hg -R h up 0
echo b > h/b
hg -R h ci -Am b
hg -R i up 0
echo c > i/c
hg -R i ci -Am c
hg -R i push h
echo

echo % check prepush logic with merged branches
hg init j
hg -R j branch a
echo init > j/foo
hg -R j ci -Am init
hg clone j k
echo a1 > j/foo
hg -R j ci -m a1
hg -R k branch b
echo b > k/foo
hg -R k ci -m b
hg -R k up 0
hg -R k merge b
hg -R k ci -m merge
hg -R k push -r a j
echo

echo % prepush -r should not allow you to sneak in new heads
hg init l
cd l
echo a >> foo
hg -q add foo
hg -q branch a
hg -q ci -d '0 0' -ma
hg -q up null
echo a >> foo
hg -q add foo
hg -q branch b
hg -q ci -d '0 0' -mb
cd ..
hg -q clone l m -u a
cd m
hg -q merge b
hg -q ci -d '0 0' -mmb
hg -q up 0
echo a >> foo
hg -q ci -ma2
hg -q up 2
echo a >> foo
hg -q branch -f b
hg -q ci -d '0 0' -mb2
hg -q merge 3
hg -q ci -d '0 0' -mma
hg push ../l -b b
cd ..

echo % check prepush with new branch head on former topo non-head
hg init n
cd n
hg branch A
echo a >a
hg ci -Ama
hg branch B
echo b >b
hg ci -Amb
# b is now branch head of B, and a topological head
# a is now branch head of A, but not a topological head
hg clone . inner
cd inner
hg up B
echo b1 >b1
hg ci -Amb1
# in the clone b1 is now the head of B
cd ..
hg up 0
echo a2 >a2
hg ci -Ama2
# a2 is now the new branch head of A, and a new topological head
# it replaces a former inner branch head, so it should at most warn about A, not B
echo %% glog of local
hg glog --template "{rev}: {branches} {desc}\n"
echo %% glog of remote
hg glog -R inner --template "{rev}: {branches} {desc}\n"
echo %% outgoing
hg out inner --template "{rev}: {branches} {desc}\n"
hg push inner
cd ..

echo % check prepush with new branch head on former topo head
hg init o
cd o
hg branch A
echo a >a
hg ci -Ama
hg branch B
echo b >b
hg ci -Amb
# b is now branch head of B, and a topological head
hg up 0
echo a1 >a1
hg ci -Ama1
# a1 is now branch head of A, and a topological head
hg clone . inner
cd inner
hg up B
echo b1 >b1
hg ci -Amb1
# in the clone b1 is now the head of B
cd ..
echo a2 >a2
hg ci -Ama2
# a2 is now the new branch head of A, and a topological head
# it replaces a former topological and branch head, so this should not warn
echo %% glog of local
hg glog --template "{rev}: {branches} {desc}\n"
echo %% glog of remote
hg glog -R inner --template "{rev}: {branches} {desc}\n"
echo %% outgoing
hg out inner --template "{rev}: {branches} {desc}\n"
hg push inner
cd ..

echo % check prepush with new branch head and new child of former branch head
echo % but child is on different branch
hg init p
cd p
hg branch A
echo a0 >a
hg ci -Ama0
echo a1 >a
hg ci -ma1
hg up null
hg branch B
echo b0 >b
hg ci -Amb0
echo b1 >b
hg ci -mb1

hg clone . inner

hg up A
hg branch -f B
echo a3 >a
hg ci -ma3
hg up 3
hg branch -f A
echo b3 >b
hg ci -mb3

echo %% glog of local
hg glog --template "{rev}: {branches} {desc}\n"
echo %% glog of remote
hg glog -R inner --template "{rev}: {branches} {desc}\n"
echo %% outgoing
hg out inner --template "{rev}: {branches} {desc}\n"
hg push inner
hg push inner -r4 -r5
hg in inner
cd ..

exit 0