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Improve check on git-svnrevert, better error message
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
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@ -14,8 +14,13 @@ fi
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COMMIT=$1
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OTHER=$(git svn find-rev "$COMMIT")
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if [ $? -ne 0 ]; then
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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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