Format git diff in svn patch

git-svn-diff

#!/bin/bash
#
# git-svn-diff originally by (http://mojodna.net/2009/02/24/my-work-git-workflow.html)
# modified by [email protected]
# modified by aconway@[redacted] - handle diffs that introduce new files
#
# Generate an SVN-compatible diff against the tip of the tracking branch

# Get the tracking branch (if we're on a branch)
TRACKING_BRANCH=`git svn info | grep URL | sed -e 's/.*\/branches\///'`


# If the tracking branch has 'URL' at the beginning, then the sed wasn't successful and
# we'll fall back to the svn-remote config option
if [[ "$TRACKING_BRANCH" =~ URL.* ]]
then
        TRACKING_BRANCH=`git config --get svn-remote.svn.fetch | sed -e 's/.*:refs\/remotes\///'`
fi

# Get the highest revision number
REV=`git svn info | grep 'Last Changed Rev:' | sed -E 's/^.*: ([[:digit:]]*)/\1/'`

# Then do the diff from the highest revision on the current branch
# and masssage into SVN format
git diff --no-prefix $(git rev-list --date-order --max-count=1 $TRACKING_BRANCH) $* |
sed -e "/--- \/dev\/null/{ N;G; s|^--- /dev/null\n+++ \(.*\)\(\n\)|--- \1       (revision 0)\2+++ \1    (revision 0)|;}" \
    -e "/new file mode [0-9]*/{ N; s/new file mode [0-9]*\n//;}" \
    -e "s/^--- .*/&     (revision $REV)/" \
    -e "s/^+++ .*/&     (working copy)/" \
    -e "s/\(^--- .*     (revision 0)\)  (revision $REV)/\1/" \
    -e "s/^diff --git [^[:space:]]*/Index:/" \
    -e "s/^index.*/===================================================================/"