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-rw-r--r--runtime/syntax/dockerfile.vim45
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diff --git a/runtime/syntax/dockerfile.vim b/runtime/syntax/dockerfile.vim
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+" dockerfile.vim - Syntax highlighting for Dockerfiles
+" Maintainer: Honza Pokorny <https://honza.ca>
+" Last Change: 2020 Feb 11
+" License: BSD
+
+" https://docs.docker.com/engine/reference/builder/
+
+if exists("b:current_syntax")
+ finish
+endif
+
+syntax include @JSON syntax/json.vim
+unlet b:current_syntax
+
+syntax include @Shell syntax/sh.vim
+unlet b:current_syntax
+
+syntax case ignore
+syntax match dockerfileLinePrefix /\v^\s*(ONBUILD\s+)?\ze\S/ contains=dockerfileKeyword nextgroup=dockerfileInstruction skipwhite
+syntax region dockerfileFrom matchgroup=dockerfileKeyword start=/\v^\s*(FROM)\ze(\s|$)/ skip=/\v\\\_./ end=/\v((^|\s)AS(\s|$)|$)/ contains=dockerfileOption
+
+syntax keyword dockerfileKeyword contained ADD ARG CMD COPY ENTRYPOINT ENV EXPOSE HEALTHCHECK LABEL MAINTAINER ONBUILD RUN SHELL STOPSIGNAL USER VOLUME WORKDIR
+syntax match dockerfileOption contained /\v(^|\s)\zs--\S+/
+
+syntax match dockerfileInstruction contained /\v<(\S+)>(\s+--\S+)*/ contains=dockerfileKeyword,dockerfileOption skipwhite nextgroup=dockerfileValue
+syntax match dockerfileInstruction contained /\v<(ADD|COPY)>(\s+--\S+)*/ contains=dockerfileKeyword,dockerfileOption skipwhite nextgroup=dockerfileJSON
+syntax match dockerfileInstruction contained /\v<(HEALTHCHECK)>(\s+--\S+)*/ contains=dockerfileKeyword,dockerfileOption skipwhite nextgroup=dockerfileInstruction
+syntax match dockerfileInstruction contained /\v<(CMD|ENTRYPOINT|RUN)>/ contains=dockerfileKeyword skipwhite nextgroup=dockerfileShell
+syntax match dockerfileInstruction contained /\v<(CMD|ENTRYPOINT|RUN)>\ze\s+\[/ contains=dockerfileKeyword skipwhite nextgroup=dockerfileJSON
+syntax match dockerfileInstruction contained /\v<(SHELL|VOLUME)>/ contains=dockerfileKeyword skipwhite nextgroup=dockerfileJSON
+
+syntax region dockerfileString contained start=/\v"/ skip=/\v\\./ end=/\v"/
+syntax region dockerfileJSON contained keepend start=/\v\[/ skip=/\v\\\_./ end=/\v$/ contains=@JSON
+syntax region dockerfileShell contained keepend start=/\v/ skip=/\v\\\_./ end=/\v$/ contains=@Shell
+syntax region dockerfileValue contained keepend start=/\v/ skip=/\v\\\_./ end=/\v$/ contains=dockerfileString
+
+syntax region dockerfileComment start=/\v^\s*#/ end=/\v$/
+set commentstring=#\ %s
+
+hi def link dockerfileString String
+hi def link dockerfileKeyword Keyword
+hi def link dockerfileComment Comment
+hi def link dockerfileOption Special
+
+let b:current_syntax = "dockerfile"