flip read to file if its not a pipe

code/templates/flip

@@ -30,6 +30,7 @@ _help() {
     echo my data | $SELF 1  # writes data with name: 1
     $SELF 1 | cat - # prints the contents of file: 1
     $SELF w file.ext # sends file keeping its name
+    $SELF r file.ext # download file with same name
 
   Config:
     set: FLEES_ROOTURL, FLEES_SHARE, FLEES_TOKEN
@@ -104,14 +105,23 @@ _write_stdin() { # name
 }
 
 _read() {
-  [[ -z "$FILE" ]] && stream_out=1
+  [[ "$FILE" = "-" ]] && stream_out=1
   [ -t 1 ] || stream_out=1
-
   [[ "$stream_out" -eq 1 ]] && {
     _read_stdout "$NAME"
-  } || {
-    _read_file "$NAME" "$FILE"
+    return
   }
+  # no file mentioned, use the name as file
+  [[ -z "$FILE" ]] && {
+      [[ -n "$NAME" ]] && {
+          FILE=$( basename "$NAME" )
+      }
+      [[ -e "$FILE" ]] && {
+        echo "'$FILE' already exists, not overwriting"
+        exit 1
+      }
+  }
+  _read_file "$NAME" "$FILE"
 }
 
 _read_file() { # name, file