tests/test-custom-filters

Add patch.eol to ignore EOLs when patching (issue1019)

The intent is to fix many issues involving patching when win32ext is enabled.
With win32ext, the working directory and repository files EOLs are not the same
which means that patches made on a non-win32ext host do not apply cleanly
because of EOLs discrepancies. A theorically correct approach would be
transform either the patched file or the patch content with the
encoding/decoding filters used by win32ext. This solution is tricky to
implement and invasive, instead we prefer to address the win32ext case, by
offering a way to ignore input EOLs when patching and rewriting them when
saving the patched result.

#!/bin/sh

hg init

cat > .hg/hgrc <<EOF
[extensions]
prefixfilter = prefix.py
[encode]
*.txt = stripprefix: Copyright 2046, The Masters
[decode]
*.txt = insertprefix: Copyright 2046, The Masters
EOF

cat > prefix.py <<EOF
from mercurial import util
def stripprefix(s, cmd, filename, **kwargs):
    header = '%s\n' % cmd
    if s[:len(header)] != header:
        raise util.Abort('missing header "%s" in %s' % (cmd, filename))
    return s[len(header):]
def insertprefix(s, cmd):
    return '%s\n%s' % (cmd, s)
def reposetup(ui, repo):
    repo.adddatafilter('stripprefix:', stripprefix)
    repo.adddatafilter('insertprefix:', insertprefix)
EOF

cat > .hgignore <<EOF
.hgignore
prefix.py
prefix.pyc
EOF

cat > stuff.txt <<EOF
Copyright 2046, The Masters
Some stuff to ponder very carefully.
EOF
hg add stuff.txt
hg ci -m stuff

echo '% Repository data:'
hg cat stuff.txt

echo '% Fresh checkout:'
rm stuff.txt
hg up -C
cat stuff.txt
echo >> stuff.txt <<EOF
Very very carefully.
EOF
hg stat

cat > morestuff.txt <<EOF
Unauthorized material subject to destruction.
EOF

echo '% Problem encoding:'
hg add morestuff.txt
hg ci -m morestuff
hg stat