mirror of
https://github.com/c64scene-ar/llvm-6502.git
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39dd163cdb
When the commit is not in the tree at all, find-rev returns 0 and prints an empty string. We need to catch that problem too, when trying to revert. Adding a list of possible problems, so that you can easily and quickly correct without having to edit the script again. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237516 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
1.6 KiB
Bash
Executable File
65 lines
1.6 KiB
Bash
Executable File
#!/bin/bash
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if [ $# -ne 1 ]; then
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echo "Invalid arguments!"
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echo "$0 <rNNNNNN | git-hash>"
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exit 1
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fi
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if [ -n "$(git status -uno -s --porcelain)" ]; then
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echo "You have unstashed changes. Please stash and then revert."
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git status -uno
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exit 1
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fi
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COMMIT=$1
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OTHER=$(git svn find-rev "$COMMIT")
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if [ $? -ne 0 ] || [ "$OTHER" = "" ]; then
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echo "Error! Could not find an svn/git revision for commit $COMMIT!"
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echo
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echo "Possible problems are:"
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echo " * Your revision number ($COMMIT) is wrong"
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echo " * This tree is not up to date (before that commit)"
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echo " * This commit in in another three (llvm, clang, compiler-rt, etc)"
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exit 1
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fi
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if [ -n "$(echo $COMMIT | grep '^r[0-9]\+')" ]; then
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SVN=`echo $COMMIT | sed -e 's/^r//'`
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GIT=$OTHER
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else
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SVN=$OTHER
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GIT=$COMMIT
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fi
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# Grab the one line message for our revert commit message.
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ONE_LINE_MSG=$(git log --oneline $GIT -1 | cut -f2- -d " ")
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# Revert the commit.
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git revert --no-commit $GIT 2>/dev/null
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if [ $? -ne 0 ]; then
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echo "Error! Failed to revert commit r$SVN. Resetting to head."
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git reset --hard HEAD
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exit 1
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fi
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# Create a template in our .git directory.
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TEMPLATE="`git rev-parse --git-dir`/git-svn-revert-template"
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cat > $TEMPLATE <<EOF
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Revert "$ONE_LINE_MSG"
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This reverts commit r$SVN.
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EOF
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# Begin the commit but give our user an opportunity to edit it.
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git commit --file="$TEMPLATE" --edit
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if [ $? -ne 0 ]; then
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echo "Error! Failed to commit reverting commit for commit r$SVN. Reverting to head."
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git reset --hard HEAD
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rm -rf $TEMPLATE
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exit 1
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fi
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rm -rf $TEMPLATE
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