`hg` to `git` one-liner

hg-to-git.sh

#!/bin/bash
CHECKOUT_DIR=$PWD
if [ ! -d /tmp/fast-export.da7f34caf5629d283761 ]; then
git clone https://github.com/frej/fast-export /tmp/fast-export
(cd /tmp/fast-export && git reset --hard d202200fd9da)
cat >/tmp/fast-export.patch<<-EOF
diff --git a/hg2git.py b/hg2git.py
index c58cade..4abcbc2 100755
--- a/hg2git.py
+++ b/hg2git.py
@@ -105,7 +105,7 @@ def save_cache(filename,cache):
 def get_git_sha1(name,type='heads'):
   try:
     # use git-rev-parse to support packed refs
-    cmd="git rev-parse --verify refs/%s/%s 2>%s" % (type,name,os.devnull)
+    cmd="git rev-parse --verify \"refs/%s/%s\" 2>%s" % (type,name,os.devnull)
     p=os.popen(cmd)
     l=p.readline()
     p.close()
EOF
patch -d /tmp/fast-export -p1 < /tmp/fast-export.patch
cat >/tmp/fast-export/authors.txt<<-EOF
<>=devnull <devnull@localhost>
\<\>=devnull <devnull@localhost>
EOF
mv /tmp/fast-export{,.da7f34caf5629d283761}
fi
mkdir -p $CHECKOUT_DIR.git
cd $CHECKOUT_DIR.git
git init
/tmp/fast-export.da7f34caf5629d283761/hg-fast-export.sh -r $CHECKOUT_DIR --force -A /tmp/fast-export.da7f34caf5629d283761/authors.txt
echo "GIT repo: $CHECKOUT_DIR.git"

(within (hg) project directory)

curl -o- https://gist.githubusercontent.com/shyiko/da7f34caf5629d283761/raw/hg-to-git.sh | bash