tests/test-import-eol

log: remove increasing windows usage in fastpath

The purpose of increasing windows is to allow backwards iteration on the
filelog  at a reasonable cost.
But is it needed?
 - if follow is False, we have no reason to iterate backwards.
   We basically just want to walk the complete filelog and yield all revisions
   within the revision range. We can do this forward or
   backwards, as it only reads the index.
 - when follow is True, we need to examine the contents of the filelog, and to
   do this efficiently we need to read the filelog forward.
   And on the other hand, to track ancestors and copies, we need to process
   revisions backwards. But is it necessary to use increasing windows
   for this?
   We can iterate over the complete filelog forward, stack the revisions, and
   read the reversed(pile), it does the same thing with a more readable code.

#!/bin/sh

cat > makepatch.py <<EOF
f = file('eol.diff', 'wb')
w = f.write
w('test message\n')
w('diff --git a/a b/a\n')
w('--- a/a\n')
w('+++ b/a\n')
w('@@ -1,5 +1,5 @@\n')
w(' a\n')
w('-bbb\r\n')
w('+yyyy\r\n')
w(' cc\r\n')
w(' \n')
w(' d\n')
w('-e\n')
w('\ No newline at end of file\n')
w('+z\r\n')
w('\ No newline at end of file\r\n')
EOF

hg init repo
cd repo
echo '\.diff' > .hgignore

# Test different --eol values
python -c 'file("a", "wb").write("a\nbbb\ncc\n\nd\ne")'
hg ci -Am adda
python ../makepatch.py

echo % invalid eol
hg --config patch.eol='LFCR' import eol.diff
hg revert -a

echo % force LF
hg --traceback --config patch.eol='LF' import eol.diff
python -c 'print repr(file("a","rb").read())'
hg st

echo % force CRLF
hg up -C 0
hg --traceback --config patch.eol='CRLF' import eol.diff
python -c 'print repr(file("a","rb").read())'
hg st

echo % auto EOL on LF file
hg up -C 0
hg --traceback --config patch.eol='auto' import eol.diff
python -c 'print repr(file("a","rb").read())'
hg st

echo % auto EOL on CRLF file
python -c 'file("a", "wb").write("a\r\nbbb\r\ncc\r\n\r\nd\r\ne")'
hg commit -m 'switch EOLs in a'
hg --traceback --config patch.eol='auto' import eol.diff
python -c 'print repr(file("a","rb").read())'
hg st

echo % auto EOL on new file or source without any EOL
python -c 'file("noeol", "wb").write("noeol")'
hg add noeol
hg commit -m 'add noeol'
python -c 'file("noeol", "wb").write("noeol\r\nnoeol\n")'
python -c 'file("neweol", "wb").write("neweol\nneweol\r\n")'
hg add neweol
hg diff --git > noeol.diff
hg revert --no-backup noeol neweol
rm neweol
hg --traceback --config patch.eol='auto' import -m noeol noeol.diff
python -c 'print repr(file("noeol","rb").read())'
python -c 'print repr(file("neweol","rb").read())'
hg st

# Test --eol and binary patches
python -c 'file("b", "wb").write("a\x00\nb\r\nd")'
hg ci -Am addb
python -c 'file("b", "wb").write("a\x00\nc\r\nd")'
hg diff --git > bin.diff
hg revert --no-backup b
echo % binary patch with --eol
hg import --config patch.eol='CRLF' -m changeb bin.diff
python -c 'print repr(file("b","rb").read())'
hg st
cd ..