1 files changed, 61 insertions, 0 deletions
diff --git a/bisect/checkout.sh b/bisect/checkout.sh
new file mode 100755
index 0000000..16fe25c
--- /dev/null
+++ b/bisect/checkout.sh
@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+
+# This script checks out both LLVM and Clang on the same revision number.
+# It can also revert a commit in the past to check for hidden failures.
+
+validate () {
+  echo $1 | grep -q "^[0-9]\+$"
+}
+
+checkout () {
+  name=$1
+  dir=$2
+  to=$3
+  echo $name
+  if [ -d $dir ]; then
+    cd $dir
+    svn revert .
+    svn up -r $to
+    cd ..
+  else
+    svn co -r $to http://llvm.org/svn/llvm-project/$dir/trunk $dir
+  fi
+}
+
+revert () {
+  dir=$1
+  minus=$2
+  cd $dir
+  svn merge -c -$minus .
+  cd ..
+}
+
+if [ "$1" = "" ]; then
+  echo "Syntax: $0 <revision-to> [<revision-minus>]"
+  exit 1
+fi
+if ! validate $1; then
+  echo "Invalid SVN revision to $1"
+  exit 1
+fi
+if [ "$2" != "" ] && ! validate $2; then
+  echo "Invalid SVN revision minus $2"
+  exit 1
+fi
+
+checkout "LLVM" llvm $1
+if [ "$2" != "" ]; then
+  revert llvm $2
+fi
+
+checkout "Clang" cfe $1
+ln -sf `pwd`/cfe `pwd`/llvm/tools/clang
+if [ "$2" != "" ]; then
+  revert cfe $2
+fi
+
+checkout "Compiler-RT" compiler-rt $1
+ln -sf `pwd`/compiler-rt `pwd`/llvm/projects/compiler-rt
+if [ "$2" != "" ]; then
+  revert compiler-rt $2
+fi