Add mdx support, closes #342

README.md

@@ -8,7 +8,7 @@ A collection of language packs for Vim.
 > One to rule them all, one to find them, one to bring them all and in the darkness bind them.
 
 - It **won't affect your startup time**, as scripts are loaded only on demand\*.
-- It **installs and updates 100+ times faster** than the <!--Package Count-->127<!--/Package Count--> packages it consists of.
+- It **installs and updates 100+ times faster** than the <!--Package Count-->128<!--/Package Count--> packages it consists of.
 - Solid syntax and indentation support (other features skipped). Only the best language packs.
 - All unnecessary files are ignored (like enormous documentation from php support).
 - No support for esoteric languages, only most popular ones (modern too, like `slim`).
@@ -109,6 +109,7 @@ If you need full functionality of any plugin, please use it directly with your p
 - [mako](https://github.com/sophacles/vim-bundle-mako) (syntax, indent, ftplugin)
 - [markdown](https://github.com/plasticboy/vim-markdown) (syntax, indent)
 - [mathematica](https://github.com/rsmenon/vim-mathematica) (syntax, ftplugin)
+- [mdx](https://github.com/jxnblk/vim-mdx-js) (syntax)
 - [meson](https://github.com/mesonbuild/meson) (syntax, indent, ftplugin)
 - [moonscript](https://github.com/leafo/moonscript-vim) (syntax, indent, ftplugin)
 - [nginx](https://github.com/chr4/nginx.vim) (syntax, indent, ftplugin)

after/syntax/mdx.vim

@@ -0,0 +1,45 @@
+if exists('g:polyglot_disabled') && index(g:polyglot_disabled, 'mdx') != -1
+  finish
+endif
+
+
+" based on mxw/vim-jsx
+
+if exists('b:current_syntax')
+  let s:current_syntax=b:current_syntax
+  unlet b:current_syntax
+endif
+syn include @XMLSyntax syntax/xml.vim
+if exists('s:current_syntax')
+  let b:current_syntax=s:current_syntax
+endif
+
+" JSX attributes should color as JS.  Note the trivial end pattern; we let
+" jsBlock take care of ending the region.
+syn region xmlString contained start=+{+ end=++ contains=jsBlock,javascriptBlock
+
+" JSX child blocks behave just like JSX attributes, except that (a) they are
+" syntactically distinct, and (b) they need the syn-extend argument, or else
+" nested XML end-tag patterns may end the outer jsxRegion.
+syn region jsxChild contained start=+{+ end=++ contains=jsBlock,javascriptBlock
+  \ extend
+
+" Highlight JSX regions as XML; recursively match.
+"
+" Note that we prohibit JSX tags from having a < or word character immediately
+" preceding it, to avoid conflicts with, respectively, the left shift operator
+" and generic Flow type annotations (http://flowtype.org/).
+syn region jsxRegion
+  \ contains=@Spell,@XMLSyntax,jsxRegion,jsxChild,jsBlock,javascriptBlock
+  \ start=+\%(<\|\w\)\@<!<\z([a-zA-Z][a-zA-Z0-9:\-.]*\)+
+  \ skip=+<!--\_.\{-}-->+
+  \ end=+</\z1\_\s\{-}>+
+  \ end=+/>+
+  \ keepend
+  \ extend
+
+" Add jsxRegion to the lowest-level JS syntax cluster.
+syn cluster jsExpression add=jsxRegion
+
+" Allow jsxRegion to contain reserved words.
+syn cluster javascriptNoReserved add=jsxRegion

build

@@ -63,7 +63,7 @@ extract() {
 
     output "${subdirs##, })"$'\n'
 
-    if (echo "julia coffee-script elixir fish git plantuml scala swift jinja" | grep -qF "$name"); then
+    if (echo "julia coffee-script elixir fish git plantuml scala swift jinja mdx" | grep -qF "$name"); then
       echo "Skipping ftdetect installation of $name" >&2
       continue
     fi
@@ -217,6 +217,7 @@ PACKS="
   mako:sophacles/vim-bundle-mako
   markdown:plasticboy/vim-markdown:_SYNTAX
   mathematica:rsmenon/vim-mathematica
+  mdx:jxnblk/vim-mdx-js
   meson:mesonbuild/meson:_ALL:/data/syntax-highlighting/vim/
   moonscript:leafo/moonscript-vim
   nginx:chr4/nginx.vim

config.vim

@@ -71,6 +71,9 @@ augroup filetypedetect
 
   "jinja
   autocmd BufNewFile,BufRead *.jinja2,*.j2,*.jinja,*.nunjucks,*.nunjs,*.njk set ft=jinja
+
+  "mdx
+  autocmd BufNewFile,BufRead *.mdx set filetype=markdown.mdx
 augroup END
 
 " Fix for https://github.com/sheerun/vim-polyglot/issues/236#issuecomment-387984954

ftdetect/polyglot.vim

@@ -71,6 +71,9 @@ augroup filetypedetect
 
   "jinja
   autocmd BufNewFile,BufRead *.jinja2,*.j2,*.jinja,*.nunjucks,*.nunjs,*.njk set ft=jinja
+
+  "mdx
+  autocmd BufNewFile,BufRead *.mdx set filetype=markdown.mdx
 augroup END
 
 " Fix for https://github.com/sheerun/vim-polyglot/issues/236#issuecomment-387984954