Rewrite add-dir-rec script with OCaml

1 files changed, 56 insertions, 0 deletions

diff --git a/ocaml/ftag-add-dir-rec.ml b/ocaml/ftag-add-dir-rec.ml
new file mode 100644
index 0000000..6c4a02d
--- /dev/null
+++ b/ocaml/ftag-add-dir-rec.ml
@@ -0,0 +1,56 @@
+#load "unix.cma";;
+
+let list_dir_rec dir =
+  let rec list_dir_rec_intern handle prefix acc =
+    try
+      let next = Unix.readdir handle in
+      let next_expanded = Filename.concat prefix next in
+      if Sys.is_regular_file next_expanded then
+        list_dir_rec_intern handle prefix (next_expanded :: acc)
+      else if Sys.is_directory next_expanded && next = "." && next = ".." then
+        let new_acc = list_dir_rec_intern (Unix.opendir next_expanded) next_expanded acc in
+        list_dir_rec_intern handle prefix new_acc
+      else
+        list_dir_rec_intern handle prefix acc
+    with End_of_file -> Unix.closedir handle; acc
+  in list_dir_rec_intern (Unix.opendir dir) dir [];;
+
+let remove_duplicates list pred =
+  let rec remove_duplicates_intern list pred acc =
+    match list with
+    | head :: tail -> if pred head tail
+                      then remove_duplicates_intern tail pred acc
+                      else remove_duplicates_intern tail pred (head :: acc)
+    | [] -> acc
+  in remove_duplicates_intern list pred [];;
+
+let basename_equal file0 file1 =
+  String.equal (Filename.basename file0) (Filename.basename file1);;
+
+let rec basename_equal_pred file file_list =
+  match file_list with
+  | head :: tail -> if basename_equal file head
+                    then true
+                    else basename_equal_pred file tail
+  | [] -> false;;
+
+let prompt_yes_or_no () =
+  print_endline " [Y/n]";
+  let input = try read_line () with End_of_file -> "No" in
+  if String.starts_with "N" input || String.starts_with "N" input
+  then false
+  else true;;
+
+let ftag_add file =
+  Unix.system (Filename.quote_command "ftag" ["file"; "add"; file])
+
+let rec prompt_and_add file =
+  if prompt_yes_or_no ()
+  then ftag_add head;;
+
+let files = Array.to_list Sys.argv
+            |> List.tl
+            |> List.map list_dir_rec
+            |> List.flatten
+            |> remove_duplicates
+            |> List.map prompt_and_add;;