Split the ocaml filetype into several filetypes

Now ocamlinterface ocamllex and menhir types must be taken into account
as well.

The filetypes are introduced by
ocaml/vim-ocaml#61

vim/merlin/dune

@@ -11,11 +11,17 @@
         (autoload/merlin_visual.vim as vim/autoload/merlin_visual.vim)
         (doc/merlin.txt as vim/doc/merlin.txt)
         (ftdetect/merlin.vim as vim/ftdetect/merlin.vim)
+        (ftplugin/menhir.vim as vim/ftplugin/menhir.vim)
         (ftplugin/merlin.vim as vim/ftplugin/merlin.vim)
         (ftplugin/ocaml.vim as vim/ftplugin/ocaml.vim)
+        (ftplugin/ocamlinterface.vim as vim/ftplugin/ocamlinterface.vim)
+        (ftplugin/ocamllex.vim as vim/ftplugin/ocamllex.vim)
         (ftplugin/omlet.vim as vim/ftplugin/omlet.vim)
         (ftplugin/reason.vim as vim/ftplugin/reason.vim)
         (plugin/merlin.vim as vim/plugin/merlin.vim)
+        (syntax_checkers/menhir/merlin.vim as vim/syntax_checkers/menhir/merlin.vim)
         (syntax_checkers/ocaml/merlin.vim as vim/syntax_checkers/ocaml/merlin.vim)
+        (syntax_checkers/ocamlinterface/merlin.vim as vim/syntax_checkers/ocamlinterface/merlin.vim)
+        (syntax_checkers/ocamllex/merlin.vim as vim/syntax_checkers/ocamllex/merlin.vim)
         (syntax_checkers/omlet/merlin.vim as vim/syntax_checkers/omlet/merlin.vim)
         (syntax/merlin.vim as vim/syntax/merlin.vim)))

vim/merlin/ftplugin/menhir.vim

@@ -0,0 +1,2 @@
+" Activate merlin on current buffer
+call merlin#Register()

vim/merlin/ftplugin/ocamlinterface.vim

@@ -0,0 +1,2 @@
+" Activate merlin on current buffer
+call merlin#Register()

vim/merlin/ftplugin/ocamllex.vim

@@ -0,0 +1,2 @@
+" Activate merlin on current buffer
+call merlin#Register()

vim/merlin/syntax_checkers/menhir/merlin.vim

@@ -0,0 +1,23 @@
+" Enable Syntastic support
+" Make sure syntax_checkers directory is on runtime path, then set
+" :let g:syntastic_menhir_checkers=['merlin']
+
+function! SyntaxCheckers_ocaml_merlin_IsAvailable()
+  if !exists("*merlin#SelectBinary")
+    return 0
+  endif
+  try
+    let l:path = merlin#SelectBinary()
+    return executable(l:path)
+  catch
+    return 0
+  endtry
+endfunction
+
+function! SyntaxCheckers_ocaml_merlin_GetLocList()
+  return merlin#ErrorLocList()
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'menhir',
+    \ 'name': 'merlin'})

vim/merlin/syntax_checkers/ocamlinterface/merlin.vim

@@ -0,0 +1,23 @@
+" Enable Syntastic support
+" Make sure syntax_checkers directory is on runtime path, then set
+" :let g:syntastic_ocamlinterface_checkers=['merlin']
+
+function! SyntaxCheckers_ocamlinterface_merlin_IsAvailable()
+  if !exists("*merlin#SelectBinary")
+    return 0
+  endif
+  try
+    let l:path = merlin#SelectBinary()
+    return executable(l:path)
+  catch
+    return 0
+  endtry
+endfunction
+
+function! SyntaxCheckers_ocamlinterface_merlin_GetLocList()
+  return merlin#ErrorLocList()
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'ocamlinterface',
+    \ 'name': 'merlin'})

vim/merlin/syntax_checkers/ocamllex/merlin.vim

@@ -0,0 +1,26 @@
+" Enable Syntastic support
+" Make sure syntax_checkers directory is on runtime path, then set
+" :let g:syntastic_ocamllex_checkers=['merlin']
+
+function! SyntaxCheckers_ocaml_merlin_IsAvailable()
+  if !exists("*merlin#SelectBinary")
+    return 0
+  endif
+  try
+    let l:path = merlin#SelectBinary()
+    return executable(l:path)
+  catch
+    return 0
+  endtry
+endfunction
+
+function! SyntaxCheckers_ocaml_merlin_GetLocList()
+  return merlin#ErrorLocList()
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'ocamllex',
+    \ 'name': 'merlin'})
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'menhir',
+    \ 'name': 'merlin'})