--- /dev/null
+(* wrappi
+ * Copyright (C) 2011 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *)
+
+open Unix
+open Printf
+
+open Wrappi_utils
+
+(* Output channel, 'pr' prints to this. *)
+let chan = ref Pervasives.stdout
+
+(* Number of lines generated. *)
+let lines = ref 0
+
+(* Name of each file generated. *)
+let files = ref []
+
+(* Print-to-current-output function, used everywhere. It has
+ * printf-like semantics.
+ *)
+let pr fs =
+ ksprintf
+ (fun str ->
+ let i = count_chars '\n' str in
+ lines := !lines + i;
+ output_string !chan str
+ ) fs
+
+let output_to filename k a =
+ files := filename :: !files;
+
+ let filename_new = filename ^ ".new" in
+ chan := open_out filename_new;
+ k a;
+ close_out !chan;
+ chan := Pervasives.stdout;
+
+ (* Is the new file different from the current file? *)
+ if Sys.file_exists filename && files_equal filename filename_new then
+ unlink filename_new (* same, so skip it *)
+ else (
+ (* different, overwrite old one *)
+ (try chmod filename 0o644 with Unix_error _ -> ());
+ rename filename_new filename;
+ chmod filename 0o444;
+ printf "written %s\n%!" filename;
+ )
+
+let get_lines_generated () =
+ !lines
+
+let get_files_generated () =
+ List.rev !files