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llvm-mirror/utils/git-svn/git-svnrevert

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#!/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 svn find-rev "$COMMIT")
if [ $? -ne 0 ]; then
echo "Error! Could not find an svn revision for commit $COMMIT!"
exit 1
fi
# Grab the one line message for our revert commit message.
ONE_LINE_MSG=$(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