contrib/git-viz/hg-viz

transaction: always remove empty journal on abort

When transactions without entries were aborted, the journal (of size 0) was not
unlinked, which prevents subsequent operations until hg recover is run on the
repository.

We also make sure the journal is unlinked when committing, even if the provided
hook doesn't do so.

#!/bin/sh

set -e

if test x"$1" != x ; then
  cd $1
fi

if [ ! -d ".hg" ]; then
    echo "${1:-.} is not a mercurial repository" 1>&2
    echo "Aborting" 1>&2
    exit 1
fi
if [ ! -d ".git" ]; then
    mkdir -v ".git"
fi
if [ -e ".git/HEAD" ]; then
    if [ ! -e ".git/HEAD.hg-viz-save" ]; then
        mv -v ".git/HEAD" ".git/HEAD.hg-viz-save"
    else
        rm -vf ".git/HEAD"
    fi
fi
hg history | head -1 | awk -F: '{print $3}' > .git/HEAD
git-viz