Adding multiple syntax group to a syntax region

Question

I’m writing a syntax file for Bats. I started my syntax file by loading the bash syntax:

let g:is_bash=1
runtime! syntax/sh.vim
unlet b:current_syntax

I then defined the Bats custom keywords:

syntax match batsTestKeyword "\v\@test"
syntax keyword batsFunction load setup teardown run skip assert_success assert_failure assert_output

Finally, I’m trying to create a region that contains both the Bash syntax and the batsFunction keywords:

syntax region batsTestBlock start='{' end='}' contains=@bash, batsFunction

However when looking at a test file only the Bash syntax is highlighted and not my custom syntax.

Any idea why my custom syntax is not included in the region?

Note: The keyword are linked as follows:

highlight default link batsTestKeyword  Identifier
highlight default link batsFunction Function

That's very odd. I copied your work, and it seems to work just fine for me. Here's a screenshot: i.andrewradev.com/ee29f978d71e940f6ceaa81c6dfd6191.png. Is it possible that the filetype is not detected correctly? Have you checked that :echo &ft displays "bats"? — anon
– anon, Commented Mar 30, 2017 at 20:32
So this is not exactly what I'm expecting: I also want the bash syntax (expected_version=$(cat $SNAP_ROOT/VERSION)) to be highlighted as it is in a Bash file. :echo &ft correctly display bats. — Aliou
– Aliou, Commented Mar 31, 2017 at 18:03
Hi! Did you ever get anywhere with this? I'm getting sick of Syntastic barfing all over my BATS files. Leave a link to your project / code, if possible, for future visitors — thanks! — ELLIOTTCABLE
– ELLIOTTCABLE, Commented May 10, 2017 at 0:26

anon · Accepted Answer · 2017-04-06 18:30:04Z

From what I understand from your comments, the problem is that the @test { } group to include bash syntax. One way I found to achieve this is by using :syntax include (:help :syn-include):

let g:is_bash=1

syntax include @BASH syntax/sh.vim
unlet b:current_syntax

runtime! syntax/sh.vim
unlet b:current_syntax

syntax match batsTestKeyword "\v\@test"
syntax keyword batsFunction load setup teardown run skip assert_success assert_failure assert_output

syntax region batsTestBlock start='{' end='}' contains=@BASH,batsFunction

highlight default link batsTestKeyword Identifier
highlight default link batsFunction Function

At the top, we include the bash syntax twice, once as the @BASH group, and once in the global namespace. The contained group can be added to the contains= list. You'd done that, actually, I assume from looking at some example, but you hadn't included the bash syntax group as that name.

I admit that syntax highlighting is not my strong suite, so there may be a better way of doing this, but this seems to work, in my experiments.

So for some reason that didn't work either, so I ended up saying that the bats keywords are contained in the shExpr syntax group from bash/sh. (Example) — Aliou
– Aliou, Commented Apr 16, 2017 at 15:55

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