Add option to filter duplicates, fix #9

README.md

@@ -72,6 +72,11 @@ Set Rust source code path (when cloning from Github usually ending on `/src`).
 let g:deoplete#sources#rust#rust_source_path='/path/to/rust/src'
 ~~~
 
+Show duplicate matches.
+~~~
+let g:deoplete#sources#rust#show_duplicates=1
+~~~
+
 To disable default key mappings (`gd` & `K`) add the following
 ~~~
 let g:deoplete#sources#rust#disable_keymap=1

doc/deoplete-rust.txt

@@ -66,6 +66,13 @@ g:deoplete#sources#rust#rust_source_path
                 e.g. `$HOME/rust/src`
                 (REQUIRED)
 
+                                     *g:deoplete#sources#rust#show_duplicates*
+g:deoplete#sources#rust#show_duplicates
+                Set whether duplicate matches should be filtered.
+                Set to 0 to filter duplicates.
+                Default: 1
+                (OPTIONAL)
+
                                       *g:deoplete#sources#rust#disable_keymap*
 g:deoplete#sources#rust#disable_keymap
                 Set to 1 to disable default keymaps.

plugin/deoplete-rust.vim

@@ -15,6 +15,9 @@ let g:deoplete#sources#rust#rust_source_path=
 let g:deoplete#sources#rust#documentation_max_height=
     \ get(g:, 'deoplete#sources#rust#documentation_max_height', 20)
 
+let g:deoplete#sources#rust#show_duplicates=
+    \ get(g:, 'deoplete#sources#rust#show_duplicates', 1)
+
 let s:buffer_nr=-1
 
 function! s:jumpTo(mode, filename, line_nr, column_nr)

rplugin/python3/deoplete/sources/rust.py

@@ -12,6 +12,7 @@
 
 VAR_RACER_BINARY = 'deoplete#sources#rust#racer_binary'
 VAR_RUST_SOURCE = 'deoplete#sources#rust#rust_source_path'
+VAR_DUPLICATION = 'deoplete#sources#rust#show_duplicates'
 
 
 class Source(Base):
@@ -26,6 +27,7 @@ def __init__(self, vim):
         self.rank = 500
 
         self.__racer = self.vim.vars.get(VAR_RACER_BINARY)
+        self.__dup = self.vim.vars.get(VAR_DUPLICATION)
         self.__encoding = self.vim.eval('&encoding')
         self.__rust_re = re.compile(r'\w*$|(?<=")[./\-\w]*$')
 
@@ -49,14 +51,17 @@ def gather_candidates(self, ctx):
         lines = self.__retrieve()
         matches = [line[6:] for line in lines if line.startswith('MATCH')]
 
+        if not bool(self.__dup):
+            matches = set(matches)
+
         for match in matches:
             tokens = match.split(",")
             candidate = {
                 'word': tokens[0],
                 'kind': tokens[4],
                 'menu': tokens[5],
                 'info': ','.join(tokens[5:]),
-                'dup': 1,
+                'dup': self.__dup,
             }
             candidates.append(candidate)