view tests/test-issue2137 @ 10914:b7ca37b90762 stable

revlog: fix lazyparser.__iter__() to return all revisions (issue2137)

Previously, it only returned revisions that were in the revlog when it
was originally opened; revisions added since then were invisible.
This broke revlog._partialmatch() and therefore repo.lookup().

(Credit to Benoit Boissinot for simplifying my original test script
and for the actual fix.)

#!/bin/sh

echo "% setup"

# create a little extension that has 3 side-effects:
#   1) ensure changelog data is not inlined
#   2) make revlog to use lazyparser
#   3) test that repo.lookup() works
# 1 and 2 are preconditions for the bug; 3 is the bug.
cat > commitwrapper.py <<EOF
from mercurial import extensions, node, revlog

def reposetup(ui, repo):
    def wrapcommit(orig, *args, **kwargs):
        result = orig(*args, **kwargs)
        tip1 = node.short(repo.changelog.tip())
        tip2 = node.short(repo.lookup(tip1))
        assert tip1 == tip2
        ui.write('new tip: %s\n' % tip1)
        return result

    extensions.wrapfunction(repo, 'commit', wrapcommit)

def extsetup(ui):
    revlog._maxinline = 128             # split out 00changelog.d early
    revlog._prereadsize = 128           # use revlog.lazyparser
EOF

cat >> $HGRCPATH <<EOF
[extensions]
commitwrapper = $PWD/commitwrapper.py
EOF

# use a long username to make sure the changelog is bigger than 128 bytes
export HGUSER='test test test test test test test test test test test'

hg init repo1
cd repo1
echo a > a
hg commit -A -m'add a with a long commit message to make the changelog a bit bigger'

# This commit puts 00changelog.i over the 128-byte threshold to split
# out 00changelog.d, which is a precondition for reproducing the bug
# with the next commit.
echo b > b
hg commit -A -m'add b and ramble on a bit here too for the same reason'

echo ""
echo "% test that new changesets are visible to repo.lookup()"
echo a >> a
hg commit -m'one more commit to demonstrate the bug'
hg tip