How do I make Syntastic work with the Dockerfile plugin?

Question

I use the vim plugins Syntastic and Dockerfile.vim.

Syntastic has some checkers now for (lower-case) dockerfile file types, which is a built-in filetype for vim, but with only rudimentary syntax support. The better support with the Dockerfile.vim plugin sets a file type of (upper-cased) Dockerfile, which isn't detected by Syntastic.

I can locally tweak the Syntastic installation to copy the dockerfile checker directory to Dockerfile, and make a few associated case changes in the checker, but that seems clumsy.

Maybe there's a way to mess with my filetype detection so I simultaneously get the benefit of both plugins? Maybe Dockerfile.vim should be building on/replacing the dockerfile filetype, and not adding a new Dockerfile?

Any suggestions?

Yeah, there is a better way, but it's only available to people who read the manual: `:h 'syntastic_filetype_map'`. — lcd047, Jun 07 '17 at 13:03
Aw, harsh. I did try, but clearly not hard enough. I missed that. Thanks! — oeuftete, Jun 07 '17 at 13:06
Maybe this could be referenced in the FAQ's 4.1? Which I certainly did read, many times. — oeuftete, Jun 07 '17 at 13:07

score 0 · Accepted Answer · answered Jun 07 '17 at 13:16

Per lcd047's comment above, Use syntastic_filetype_map:

*'syntastic_filetype_map'* Type: dictionary Default: {} Use this option to map non-standard filetypes to standard ones. Corresponding checkers are mapped accordingly, which allows syntastic to check files with non-standard filetypes: > let g:syntastic_filetype_map = { \ "plaintex": "tex", \ "gentoo-metadata": "xml" }

So: let g:syntastic_filetype_map = {"Dockerfile": "dockerfile"}

How do I make Syntastic work with the Dockerfile plugin?

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