Add require function to copy.sh

Add requirements for jq and gron - used by mirror.sh

copy.sh

@@ -6,15 +6,21 @@ SCRIPT_DIR="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 FAKE_HOME="$SCRIPT_DIR/fake_home"
 export f="$FAKE_HOME"
 
-if ! command -v wget &> /dev/null; then
-  echo "wget must be installed!"
-  exit 1
-fi
+function require {
+    local success=true
+    for comm in "$@"; do
+        if ! command -v "$comm" &> /dev/null; then
+          echo "$comm must be installed!"
+          success=false
+        fi
+    done
+    if ! $success; then
+        echo "Missing copy.sh dependencies! Exiting!"
+        exit 1
+    fi
+}
 
-if ! command -v curl &> /dev/null; then
-  echo "curl must be installed!"
-  exit 1
-fi
+require git wget curl find jq gron
 
 mkdir -p "$HOME/.tmp" || exit 1