tests/test-log

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

hg init a

cd a
echo a > a
hg ci -Ama -d '1 0'

hg cp a b
hg ci -mb -d '2 0'

mkdir dir
hg mv b dir
hg ci -mc -d '3 0'

hg mv a b
echo a > d
hg add d
hg ci -md -d '4 0'

hg mv dir/b e
hg ci -me -d '5 0'

hg log a
echo % -f, directory
hg log -f dir
echo % -f, but no args
hg log -f
echo % one rename
hg log -vf a
echo % many renames
hg log -vf e

echo % log -pf dir/b
hg log -pf dir/b
echo % log -vf dir/b
hg log -vf dir/b

echo '% log copies with --copies'
hg log -vC --template '{rev} {file_copies}\n'
echo '% log copies switch without --copies, with old filecopy template'
hg log -v --template '{rev} {file_copies_switch%filecopy}\n'
echo '% log copies switch with --copies'
hg log -vC --template '{rev} {file_copies_switch}\n'

echo '% log copies with hardcoded style and with --style=default'
hg log -vC -r4
hg log -vC -r4 --style=default

echo % log copies, non-linear manifest
hg up -C 3
hg mv dir/b e
echo foo > foo
hg ci -Ame2 -d '6 0'
hg log -v --template '{rev} {file_copies}\n' -r 5

echo % log copies, execute bit set
chmod +x e
hg ci -me3 -d '7 0'
hg log -v --template '{rev} {file_copies}\n' -r 6

echo '% log -p d'
hg log -pv d

# log --follow tests
hg init ../follow
cd ../follow

echo base > base
hg ci -Ambase -d '1 0'

echo r1 >> base
hg ci -Amr1 -d '1 0'
echo r2 >> base
hg ci -Amr2 -d '1 0'

hg up -C 1
echo b1 > b1
hg ci -Amb1 -d '1 0'

echo % log -f
hg log -f

hg up -C 0
echo b2 > b2
hg ci -Amb2 -d '1 0'

echo % log -f -r 1:tip
hg log -f -r 1:tip

hg up -C 3
hg merge tip

echo % log -r .  with two parents
hg log -r .

hg ci -mm12 -d '1 0'

echo % log -r .  with one parent
hg log -r .

echo postm >> b1
hg ci -Amb1.1 -d'1 0'

echo % log --follow-first
hg log --follow-first

echo % log -P 2
hg log -P 2

echo '% log -r tip -p --git'
hg log -r tip -p --git

echo '% log -r ""'
hg log -r ''

echo '% log -r <some unknown node id>'
hg log -r 1000000000000000000000000000000000000000

echo '% log -k r1'
hg log -k r1

echo '% log -d -1'
hg log -d -1

echo '% log -p -l2 --color=always'
hg --config extensions.color= --config color.mode=ansi \
    log -p -l2 --color=always

echo '% log -r tip --stat'
hg log -r tip --stat

cd ..

hg init usertest
cd usertest

echo a > a
hg ci -A -m "a" -u "User One <[e-mail]>"
echo b > b
hg ci -A -m "b" -u "User Two <[e-mail]>"

hg log -u "User One <[e-mail]>"
hg log -u "user1" -u "user2"
hg log -u "user3"

cd ..

hg init branches
cd branches

echo a > a
hg ci -A -m "commit on default"
hg branch test
echo b > b
hg ci -A -m "commit on test"

hg up default
echo c > c
hg ci -A -m "commit on default"
hg up test
echo c > c
hg ci -A -m "commit on test"

echo '% log -b default'
hg log -b default

echo '% log -b test'
hg log -b test

echo '% log -b dummy'
hg log -b dummy

echo '% log -b .'
hg log -b .

echo '% log -b default -b test'
hg log -b default -b test

echo '% log -b default -b .'
hg log -b default -b .

echo '% log -b . -b test'
hg log -b . -b test

echo '% log -b 2'
hg log -b 2

echo '% log -p --cwd dir (in subdir)'
mkdir dir
hg log -p --cwd dir

echo '% log -p -R repo'
cd dir
hg log -p -R .. ../a


exit 0