Add functions for extracting Gitlab project name.

cli/gitconfig/dune

@@ -1,7 +1,8 @@
 (library
   (name gitconfig)
   (package lab)
-  (modules types lexer parser)
+  (modules types lexer parser resolve)
+  (libraries str)
   (modules_without_implementation types))
 
 (ocamllex lexer)

cli/gitconfig/resolve.ml

@@ -0,0 +1,73 @@
+let find_dot_git () =
+  let rec search dir =
+    let dot_git = Filename.concat dir ".git" in
+    if Sys.file_exists dot_git && Sys.is_directory dot_git then
+      Some dot_git
+    else
+      let parent_dir = Filename.dirname dir in
+      if not (String.equal dir parent_dir) then
+        search parent_dir
+      else
+        None
+  in
+  search (Sys.getcwd ())
+
+let parse_dot_git () =
+  let dot_git = find_dot_git () in
+  match dot_git with
+  | None -> Error "No .git directory found in this directory, nor in a parent \
+              directory."
+  | Some dot_git ->
+    let config_file = Filename.concat dot_git "config" in
+    begin try
+      let chan = open_in config_file in
+      let lexbuf = Lexing.from_channel chan in
+      begin try
+        Ok (Parser.config Lexer.token lexbuf)
+      with
+      | Lexer.Error msg ->
+          Error (Printf.sprintf "Error in lexer while parsing %s: %s%!"
+            config_file msg)
+      | Parser.Error ->
+          Error (Printf.sprintf
+            "Error while parsing %s: At offset %d: syntax error.\n%!"
+            config_file
+            (Lexing.lexeme_start lexbuf))
+      end
+    with Sys_error e ->
+      Error ("Error when opening " ^ config_file ^ ": " ^ e)
+    end
+
+let gitlab_project_from_url url =
+  let regex = Str.regexp
+    "^git@[A-Za-z0-9.-]+:\\([A-Za-z0-9-]+/[A-Za-z-]+\\)\\(\\.git\\)?$\
+    \\|\
+    ^https:[A-Za-z0-9./-]+/\\([A-Za-z0-9-]+/[A-Za-z-]+\\)\\(\\.git\\)?$"
+  in
+  if Str.string_match regex url 0 then Some (Str.matched_group 1 url) else None
+
+let gitlab_project_name ?remote config =
+  match remote with
+  | Some remote ->
+    begin try
+      let settings = List.assoc ("remote \"" ^ remote ^ "\"") config in
+      let url = List.assoc "url" settings in
+      gitlab_project_from_url url
+    with Not_found -> None
+    end
+  | None ->
+    let remotes =
+      List.filter
+        (fun (name,_) -> String.starts_with ~prefix:"remote \"" name &&
+          String.ends_with ~suffix:"\"" name)
+        config
+    in
+    begin match remotes with
+    | [(_name,settings)] ->
+        Printf.printf "case 1\n";
+        begin try
+          gitlab_project_from_url (List.assoc "url" settings)
+        with Not_found -> None
+        end
+    | _ :: _ | [] -> Printf.printf "case 2\n"; None
+    end

cli/gitconfig/resolve.mli

@@ -0,0 +1,14 @@
+(** Search for a [.git] directory from the current directory upwards. Return
+    [None] if none could be found. *)
+val find_dot_git : unit -> string option
+
+(** Search for a [.git] directory from the current directory upwards, and parse
+    it.  Return [Error] with an error message if none could be found, or in
+    case of parse error. *)
+val parse_dot_git : unit -> (Types.config, string) result
+
+(** [gitlab_project_name ~remote config] extracts the Gitlab project name from
+    the URL of the remote named [remote] in [config]. If [remote] is not
+    specified, and there is more than one remote, returns [None]. Also returns
+    [None] if no suitable remote URL can be found.  *)
+val gitlab_project_name : ?remote:string -> Types.config -> string option