Add org mode, close #706

autoload/org.vim

@@ -0,0 +1,30 @@
+if polyglot#init#is_disabled(expand('<sfile>:p'), 'org', 'autoload/org.vim')
+  finish
+endif
+
+" Helper functions for org.vim
+"
+" Maintainer:   Alex Vear <av@axvr.io>
+" License:      Vim (see `:help license`)
+" Location:     autoload/org.vim
+" Website:      https://github.com/axvr/org.vim
+" Last Change:  2020-01-04
+
+" Fallback chain for options. Buffer local --> Global --> default.
+function org#option(name, default) abort
+    return get(b:, a:name, get(g:, a:name, a:default))
+endfunction
+
+" Emacs-like fold text.
+function org#fold_text() abort
+    return getline(v:foldstart) . '...'
+endfunction
+
+" Check fold depth of a line.
+function org#fold_expr()
+    let l:depth = match(getline(v:lnum), '\(^\*\+\)\@<=\( .*$\)\@=')
+    if l:depth > 0 && synIDattr(synID(v:lnum, 1, 1), 'name') =~# '\m^o\(rg\|utline\)Heading'
+        return ">" . l:depth
+    endif
+    return "="
+endfunction

autoload/polyglot/init.vim

@@ -169,6 +169,10 @@ let did_load_filetypes = 1
 
 " DO NOT EDIT CODE BELOW, IT IS GENERATED WITH MAKEFILE
 
+if !has_key(g:polyglot_is_disabled, 'org')
+  au BufNewFile,BufRead *.org setf org
+endif
+
 if !has_key(g:polyglot_is_disabled, 'mermaid')
   au BufNewFile,BufRead *.mermaid,*.mm,*.mmd setf mermaid
 endif

autoload/polyglot/sleuth.vim

@@ -388,6 +388,7 @@ let s:globs = {
   \ 'openscad': '*.scad',
   \ 'opl': '*.[Oo][Pp][Ll]',
   \ 'ora': '*.ora',
+  \ 'org': '*.org',
   \ 'pamconf': '',
   \ 'pamenv': 'pam_env.conf,.pam_environment',
   \ 'papp': '*.papp,*.pxml,*.pxsl',