Convert Subversion repositories to Git

svn-to-git.sh

#!/bin/sh

## -- Usage -- ##
#
# svn-to-git <svn_repository_url>
#
#   svn_repository_url    e.g. svn+ssh://svn.example.com/projects/hello_world
#

SVN=$1
TMP=/tmp

[ -z "$SVN" ] && echo 'Missing svn repository' >&2 && exit 1

# Transform authors
svn log -q "$SVN" | \
awk -F '|' '/^r/ {
	sub("^ ", "", $2);
	sub(" $", "", $2);

	if ( $2 == "franklin" || $2 == "Franklin" ) {
		print $2" = Franklin Strube <[email protected]>";
	} else if ( $2 == "tstuck" ) {
		print $2" = Tony Stuck <[email protected]>";
	} else if ( $2 == "astroh" ) {
		print $2" = Alexandra Stroh <[email protected]>";
	} else {
		print $2" = "$2" <"$2">";
	}
}' | sort -u > $TMP/authors-transform.txt
[ $(cat $TMP/authors-transform.txt | wc -l | tr -d ' ' | cut -c1) -eq 0 ] && exit 1
vi $TMP/authors-transform.txt

# Clone SVN repository to Git
git svn clone "$SVN" -A $TMP/authors-transform.txt --stdlayout $TMP/$(basename $SVN).git || exit 1
cd $TMP/$(basename $SVN).git

# Converting svn:ignore to .gitignore
if [ ! -f .gitignore ]; then
	git svn show-ignore > .gitignore || rm .gitignore
	[ -f .gitignore ] && git add .gitignore && git commit -m 'Convert svn:ignore properties to .gitignore'
fi

# Convert tag remotes
git for-each-ref --format='%(refname)' refs/remotes/tags | cut -d / -f 4 | while read ref
do
  git tag "$ref" "refs/remotes/tags/$ref";
done


# Push repository to a bare git repository (remote origin)
echo ''
GITHUB_USER=$(git config --get user.email | cut -f1 -d@)
read -p "Remote Git repository [[email protected]:$GITHUB_USER/$(basename $SVN).git]: " REMOTE
${REMOTE:[email protected]:$GITHUB_USER/$(basename $SVN).git}
git remote add origin $REMOTE || exit 1
echo ''
git config remote.origin.push 'refs/heads/*:refs/heads/*' || exit 1
read -p 'Would you like to push to the remote repository? [Y|n] ' PUSH
case ${PUSH:-Y} in
    [Yy])
        git push origin
        git push origin refs/tags/*
esac

Based on http://john.albin.net/git/convert-subversion-to-git