1[
 2	"FROM"
 3	"AS"
 4	"RUN"
 5	"CMD"
 6	"LABEL"
 7	"EXPOSE"
 8	"ENV"
 9	"ADD"
10	"COPY"
11	"ENTRYPOINT"
12	"VOLUME"
13	"USER"
14	"WORKDIR"
15	"ARG"
16	"ONBUILD"
17	"STOPSIGNAL"
18	"HEALTHCHECK"
19	"SHELL"
20	"MAINTAINER"
21	"CROSS_BUILD"
22	(heredoc_marker)
23	(heredoc_end)
24] @keyword
25
26[
27	":"
28	"@"
29] @operator
30
31(comment) @comment
32
33
34(image_spec
35	(image_tag
36		":" @punctuation.special)
37	(image_digest
38		"@" @punctuation.special))
39
40[
41	(double_quoted_string)
42	(single_quoted_string)
43	(json_string)
44	(heredoc_line)
45] @string
46
47(expansion
48  [
49	"$"
50	"{"
51	"}"
52  ] @punctuation.special
53) @none
54
55((variable) @constant
56 (#match? @constant "^[A-Z][A-Z_0-9]*$"))