1 files changed, 42 insertions, 0 deletions
diff --git a/tool/bisect.sh b/tool/bisect.sh
new file mode 100755
index 0000000000..fb22bf429b
--- /dev/null
+++ b/tool/bisect.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+# usage:
+#   edit $(srcdir)/test.rb
+#   git bisect start `git svn find-rev <rBADREV>` `git svn find-rev <rGOODREV>`
+#   cd <builddir>
+#   make bisect (or bisect-ruby for full ruby)
+
+if [ "x" = "x$MAKE" ]; then
+  MAKE=make
+fi
+
+case $1 in
+  miniruby | ruby ) # (miniruby|ruby) <srcdir>
+    srcdir=$2
+    builddir=`pwd` # assume pwd is builddir
+    path=$builddir/_bisect.sh
+    echo "path: $path"
+    cp $0 $path
+    cd $srcdir
+    echo "git bisect run $path run-$1"
+    git bisect run $path run-$1
+    ;;
+  run-miniruby )
+    cd ${0%/*} # assume a copy of this script is in builddir
+    $MAKE Makefile
+    $MAKE mini || exit 125
+    $MAKE run || exit 1
+    ;;
+  run-ruby )
+    cd ${0%/*} # assume a copy of this script is in builddir
+    $MAKE Makefile
+    $MAKE program || exit 125
+    $MAKE runruby || exit 1
+    ;;
+  "" )
+    echo foo bar
+    ;;
+  * )
+    echo unkown command "'$cmd'"
+    ;;
+esac
+exit 0