1 files changed, 33 insertions, 0 deletions
diff --git a/security/nss/fuzz/config/git-copy.sh b/security/nss/fuzz/config/git-copy.sh
new file mode 100644
index 0000000000..a5c7d371da
--- /dev/null
+++ b/security/nss/fuzz/config/git-copy.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [ $# -lt 3 ]; then
+  echo "Usage: $0 <repo> <branch> <directory>" 1>&2
+  exit 2
+fi
+
+REPO=$1
+COMMIT=$2
+DIR=$3
+
+echo "Copy '$COMMIT' from '$REPO' to '$DIR'"
+if [ -f $DIR/.git-copy ]; then
+  CURRENT=$(cat $DIR/.git-copy)
+  if [ $(echo -n $COMMIT | wc -c) != "40" ]; then
+    # On the off chance that $COMMIT is a remote head.
+    ACTUAL=$(git ls-remote $REPO $COMMIT | cut -c 1-40 -)
+  else
+    ACTUAL=$COMMIT
+  fi
+  if [ "$CURRENT" = "$ACTUAL" ]; then
+    echo "Up to date."
+    exit
+  fi
+fi
+
+git init -q $DIR
+git -C $DIR fetch -q --depth=1 $REPO $COMMIT:git-copy-tmp
+git -C $DIR reset --hard git-copy-tmp
+git -C $DIR rev-parse --verify HEAD > $DIR/.git-copy
+rm -rf $DIR/.git