1 files changed, 53 insertions, 0 deletions
diff --git a/utils/git-svn/git-svnrevert b/utils/git-svn/git-svnrevert
new file mode 100755
index 0000000000..de4ff1cd46
--- /dev/null
+++ b/utils/git-svn/git-svnrevert
@@ -0,0 +1,53 @@
+#!/bin/bash
+
+if [ $# -ne 1 ]; then
+    echo "Invalid arguments!"
+    echo "$0 <commit to revert>"
+    exit 1
+fi
+
+if [ -n "$(git status -uno -s --porcelain)" ]; then
+    echo "You have unstashed changes. Please stash and then revert."
+    git status -uno
+    exit 1
+fi
+
+COMMIT=$1
+
+SVN_REVISION=$(git log -1 $COMMIT | grep git-svn-id | tr -s "@" " " | cut -f 4 -d " ")
+
+if [ -z "$SVN_REVISION" ]; then
+    echo "Error! Given commit is not a git-svn revision!"
+    exit 1
+fi
+
+# Grab the one line message for our revert commit message.
+ONE_LINE_MSG=$(git log --oneline $COMMIT -1 | cut -f2- -d " ")
+
+# Revert the commit.
+git revert --no-commit $COMMIT 2>/dev/null
+if [ $? -ne 0 ]; then
+    echo "Error! Failed to revert commit $COMMIT. Resetting to head."
+    git reset --hard HEAD
+    exit 1
+fi
+
+# Create a template in our .git directory.
+TEMPLATE="`git rev-parse --git-dir`/git-svn-revert-template"
+cat > $TEMPLATE <<EOF
+Revert "$ONE_LINE_MSG"
+
+This reverts commit r$SVN_REVISION.
+EOF
+
+# Begin the commit but give our user an opportunity to edit it.
+git commit --file="$TEMPLATE" --edit
+if [ $? -ne 0 ]; then
+    echo "Error! Failed to commit reverting commit for commit $COMMIT. Reverting to head."
+    git reset --hard HEAD
+    rm -rf $TEMPLATE
+    exit 1
+fi
+
+rm -rf $TEMPLATE
+