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
COMMIT=$1
OTHER=$(git svn find-rev "$COMMIT")
-if [ $? -ne 0 ]; then
+if [ $? -ne 0 ] || [ "$OTHER" = "" ]; then
echo "Error! Could not find an svn/git revision for commit $COMMIT!"
+ echo
+ echo "Possible problems are:"
+ echo " * Your revision number ($COMMIT) is wrong"
+ echo " * This tree is not up to date (before that commit)"
+ echo " * This commit in in another three (llvm, clang, compiler-rt, etc)"
exit 1
fi