1 files changed, 83 insertions, 0 deletions
diff --git a/runtime/ftplugin/erlang.vim b/runtime/ftplugin/erlang.vim
new file mode 100644
index 0000000..c775247
--- /dev/null
+++ b/runtime/ftplugin/erlang.vim
@@ -0,0 +1,83 @@
+" Vim ftplugin file
+" Language:     Erlang (http://www.erlang.org)
+" Maintainer:   Csaba Hoch <csaba.hoch@gmail.com>
+" Author:       Oscar Hellström <oscar@oscarh.net>
+" Contributors: Ricardo Catalinas Jiménez <jimenezrick@gmail.com>
+"               Eduardo Lopez (http://github.com/tapichu)
+"               Arvid Bjurklint (http://github.com/slarwise)
+" Last Update:  2021-Jan-08
+" License:      Vim license
+" URL:          https://github.com/vim-erlang/vim-erlang-runtime
+
+if exists('b:did_ftplugin')
+  finish
+endif
+let b:did_ftplugin = 1
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+let &l:keywordprg = get(g:, 'erlang_keywordprg', 'erl -man')
+
+if get(g:, 'erlang_folding', 0)
+  setlocal foldmethod=expr
+  setlocal foldexpr=GetErlangFold(v:lnum)
+  setlocal foldtext=ErlangFoldText()
+endif
+
+setlocal comments=:%%%,:%%,:%
+setlocal commentstring=%%s
+
+setlocal formatoptions+=ro
+
+setlocal suffixesadd=.erl,.hrl
+
+let &l:include = '^\s*-\%(include\|include_lib\)\s*("\zs\f*\ze")'
+let &l:define  = '^\s*-\%(define\|record\|type\|opaque\)'
+
+let s:erlang_fun_begin = '^\a\w*(.*$'
+let s:erlang_fun_end   = '^[^%]*\.\s*\(%.*\)\?$'
+
+if !exists('*GetErlangFold')
+  function GetErlangFold(lnum)
+    let lnum = a:lnum
+    let line = getline(lnum)
+
+    if line =~ s:erlang_fun_end
+      return '<1'
+    endif
+
+    if line =~ s:erlang_fun_begin && foldlevel(lnum - 1) == 1
+      return '1'
+    endif
+
+    if line =~ s:erlang_fun_begin
+      return '>1'
+    endif
+
+    return '='
+  endfunction
+endif
+
+if !exists('*ErlangFoldText')
+  function ErlangFoldText()
+    let line    = getline(v:foldstart)
+    let foldlen = v:foldend - v:foldstart + 1
+    let lines   = ' ' . foldlen . ' lines: ' . substitute(line, "[\ \t]*", '', '')
+    if foldlen < 10
+      let lines = ' ' . lines
+    endif
+    let retval = '+' . v:folddashes . lines
+
+    return retval
+  endfunction
+endif
+
+let b:undo_ftplugin = "setlocal keywordprg< foldmethod< foldexpr< foldtext<"
+      \ . " comments< commentstring< formatoptions< suffixesadd< include<"
+      \ . " define<"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim: sw=2 et