revlog: add a magic null revision to our index We expand our index by one entry so that index[nullrev] points to a unique entry, the null revision. This naturally eliminates numerous extra tests in the performance-sensitive index access functions, most of which are now trivial again. Adding new entries is now done with insert(-1, e) rather than append(e).

#!/bin/sh

cat > $HGRCPATH <<EOF
[extensions]
alias=

[alias]
myinit = init
cleanstatus = status -c
unknown = bargle
ambiguous = s
recursive = recursive
EOF

echo '% basic'
hg myinit alias

echo '% unknown'
hg unknown

echo '% ambiguous'
hg ambiguous

echo '% recursive'
hg recursive

cd alias
echo foo > foo
hg ci -Amfoo

echo '% with opts'
hg cleanst