view tests/test-mq-qrefresh @ 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 "mq=" >> $HGRCPATH

catpatch() {
    cat $1 | sed -e "s/^\(# Parent \).*/\1/"
}

echo % init
hg init a
cd a

echo % commit
mkdir 1 2
echo 'base' > 1/base
echo 'base' > 2/base
hg ci -Ambase -d '1 0'

echo % qnew mqbase
hg qnew -mmqbase mqbase

echo % qrefresh
echo 'patched' > 1/base
echo 'patched' > 2/base
hg qrefresh

echo % qdiff
hg qdiff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
               -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % qdiff dirname
hg qdiff . | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
                 -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % patch file contents
catpatch .hg/patches/mqbase | \
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % qrefresh 1
echo 'patched again' > base
hg qrefresh 1

echo % qdiff
hg qdiff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
               -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % qdiff dirname
hg qdiff . | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
                 -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % patch file contents
catpatch .hg/patches/mqbase | \
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % qrefresh . in subdir
( cd 1 ; hg qrefresh . )

echo % qdiff
hg qdiff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
               -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % qdiff dirname
hg qdiff . | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
                 -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % patch file contents
catpatch .hg/patches/mqbase | \
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % qrefresh in hg-root again
hg qrefresh

echo % qdiff
hg qdiff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
               -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % qdiff dirname
hg qdiff . | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
                 -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % patch file contents
catpatch .hg/patches/mqbase | \
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo
echo % qrefresh --short tests:
echo 'orphan' > orphanchild
hg add orphanchild

echo % - add 1/base and 2/base one by one
hg qrefresh nonexistingfilename # clear patch
hg qrefresh --short 1/base
hg qrefresh --short 2/base

echo % -- qdiff output
hg qdiff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
               -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"

echo % -- patch file content
catpatch .hg/patches/mqbase | \
sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
    -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"
hg st

echo % -- diff shows what is not in patch
hg diff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \
              -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/" \
              -e "s/^\(diff\).*/\1/"
echo % - before starting exclusive tests
sed -n '/^diff/s/diff -r [^ ]* //p' .hg/patches/mqbase
echo % - exclude 2/base
hg qref -s -X 2/base
sed -n '/^diff/s/diff -r [^ ]* //p' .hg/patches/mqbase
echo % -- status shows 2/base as dirty
hg st
echo % - remove 1/base and add 2/base again but not orphanchild
hg qref -s -X orphanchild -X 1/base 2/base orphanchild
sed -n '/^diff/s/diff -r [^ ]* //p' .hg/patches/mqbase
echo % - add 1/base with include filter - and thus remove 2/base from patch
hg qref -s -I 1/ o* */*
sed -n '/^diff/s/diff -r [^ ]* //p' .hg/patches/mqbase
echo
cd ..

# Test qrefresh --git losing copy metadata
echo % create test repo
hg init repo
cd repo
echo "[diff]" >> .hg/hgrc
echo "git=True" >> .hg/hgrc
echo a > a
hg ci -Am adda
hg copy a ab
echo b >> ab
hg copy a ac
echo c >> ac
echo % capture changes
hg qnew -f p1
hg qdiff
echo % refresh and check changes again
hg qref
hg qdiff
cd ..

# Test issue 1441: qrefresh confused after hg rename
echo % issue1441 without git patches
hg init repo-1441
cd repo-1441
echo a > a
hg add a
hg qnew -f p
hg mv a b
hg qrefresh
hg qdiff --nodates
cd ..

echo '% issue2025: qrefresh does not honor filtering options when tip != qtip'
hg init repo-2025
cd repo-2025
echo a > a
echo b > b
hg ci -qAm addab
echo a >> a
echo b >> b
hg qnew -f patch
hg up -qC 0
echo c > c
hg ci -qAm addc
hg up -qC 1
echo '% refresh with tip != qtip'
hg --config diff.nodates=1 qrefresh -I b 2>&1 \
    | sed 's/saving bundle.*/saving bundle.../g'
echo '% status after refresh'
hg st
echo '% b after refresh'
cat b
echo '% patch file after refresh'
catpatch .hg/patches/patch
cd ..


echo % issue1441 with git patches
hg init repo-1441-git
cd repo-1441-git
echo "[diff]" >> .hg/hgrc
echo "git=True" >> .hg/hgrc
echo a > a
hg add a
hg qnew -f p
hg mv a b
hg qrefresh
hg qdiff --nodates
cd ..