view tests/test-win32text @ 8849:80cc4b1a62d0

compare grep result between target and its parent

I found that typical case is that grep target is added at (*) revision
in the tree shown below.

     +--- 1(*) --- 3
     0
     +--- 2 ------ 4

Now, I expect 'hg grep --all' to show only rev:1 which is first
appearance of target line.

But 'hg grep --all' will tell:

  target line dis-appeared at 3 => 4
  target line     appeared at 2 => 3
  target line dis-appeared at 1 => 2
  target line     appeared at 0 => 1

because current 'hg grep' implementation compares not between target
revision and its parent, but between neighbor revisions in walkthrough
order.

I checked performance of this patch by "hg grep --follow --all
walkchangerevs" on whole Mercurial repo, and patched version could
complete as fast as un-patched one.

#!/bin/sh

hg init t
cd t

cat > unix2dos.py <<EOF
import sys

for path in sys.argv[1:]:
    data = file(path, 'rb').read()
    data = data.replace('\n', '\r\n')
    file(path, 'wb').write(data)
EOF

cat > print.py <<EOF
import sys
print(sys.stdin.read().replace('\n', '<LF>').replace('\r', '<CR>').replace('\0', '<NUL>'))
EOF

echo '[hooks]' >> .hg/hgrc
echo 'pretxncommit.crlf = python:hgext.win32text.forbidcrlf' >> .hg/hgrc
echo 'pretxnchangegroup.crlf = python:hgext.win32text.forbidcrlf' >> .hg/hgrc
cat .hg/hgrc
echo

echo hello > f
hg add f
echo commit should succeed
hg ci -m 1
echo

hg clone . ../zoz
cp .hg/hgrc ../zoz/.hg

python unix2dos.py f
echo commit should fail
hg ci -m 2.1
echo

mv .hg/hgrc .hg/hgrc.bak
echo commits should succeed
hg ci -m 2
hg cp f g
hg ci -m 2.2
echo

echo push should fail
hg push ../zoz
echo

mv .hg/hgrc.bak .hg/hgrc
echo hello > f
hg rm g
echo commit should succeed
hg ci -m 2.3
echo

echo push should succeed
hg push ../zoz
echo

echo and now for something completely different
mkdir d
echo hello > d/f2
python unix2dos.py d/f2
hg add d/f2
hg ci -m 3
hg revert -a
rm d/f2
echo

hg rem f
hg ci -m 4
echo

python -c 'file("bin", "wb").write("hello\x00\x0D\x0A")'
hg add bin
hg ci -m 5
hg log -v
echo

hg clone . dupe
echo
for x in a b c d; do echo content > dupe/$x; done
hg -R dupe add
python unix2dos.py dupe/b dupe/c dupe/d
hg -R dupe ci -m a dupe/a
hg -R dupe ci -m b/c dupe/[bc]
hg -R dupe ci -m d dupe/d
hg -R dupe log -v
echo

hg pull dupe
echo

hg log -v
echo

rm .hg/hgrc
(echo some; echo text) > f3
python -c 'file("f4.bat", "wb").write("rem empty\x0D\x0A")'
hg add f3 f4.bat
hg ci -m 6

python print.py < bin
python print.py < f3
python print.py < f4.bat
echo

echo '[extensions]' >> .hg/hgrc
echo 'win32text = ' >> .hg/hgrc
echo '[decode]' >> .hg/hgrc
echo '** = cleverdecode:' >> .hg/hgrc
echo '[encode]' >> .hg/hgrc
echo '** = cleverencode:' >> .hg/hgrc
cat .hg/hgrc
echo

rm f3 f4.bat bin
hg co -C 2>&1 | python -c 'import sys, os; sys.stdout.write(sys.stdin.read().replace(os.getcwd(), "...."))'
python print.py < bin
python print.py < f3
python print.py < f4.bat
echo

python -c 'file("f5.sh", "wb").write("# empty\x0D\x0A")'
hg add f5.sh
hg ci -m 7
python print.py < f5.sh
hg cat f5.sh | python print.py

echo '% just linefeed' > linefeed
hg ci -qAm 8 linefeed
python print.py < linefeed
hg cat linefeed | python print.py
hg st -q
hg revert -a linefeed
python print.py < linefeed
hg st -q
echo modified >> linefeed
hg st -q
hg revert -a
hg st -q
python print.py < linefeed