Add script to add file license headers (#4690)

Author: Mpdreamz

build/add-headers.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+script_path=$(dirname $(realpath -s $0))/../
+
+
+(find "$script_path" -name "*.fs" | grep -v "/bin/" | grep -v "/obj/")|while read fname; do
+    line=$(head -n 1 "$fname")
+    if [[ "$line" =~ ^/ ]] || [[ "$line" =~ ^# ]] ; then 
+      echo "Skipped already starts with / or #: $fname"
+    else 
+      cat "${script_path}build/file-header.txt" "$fname" > "${fname}.new"
+      mv "${fname}.new" "$fname"
+    fi
+done
+
+(find "$script_path" -name "*.cs" | grep -v "/bin/" | grep -v "/obj/")|while read fname; do
+    line=$(head -n 1 "$fname")
+    if [[ "$line" =~ ^/ ]] || [[ "$line" =~ ^# ]] ; then 
+      echo "Skipped already starts with / or #: $fname"
+    else 
+      cat "${script_path}build/file-header.txt" "$fname" > "${fname}.new"
+      mv "${fname}.new" "$fname"
+    fi
+done

build/file-header.txt

@@ -0,0 +1,4 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+