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Improve docker lexer #2092

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Improve docker lexer #2092

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5feca6e
Improve docker lexer
Bond-009 Nov 27, 2024
6da9638
Allow single quotes for LABEL keys
Bond-009 Nov 27, 2024
0db8b7d
And syntax highlighting for ENV instructions
Bond-009 Dec 4, 2024
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23 changes: 22 additions & 1 deletion lib/rouge/lexers/docker.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@ class Docker < RegexLexer
mimetypes 'text/x-dockerfile-config'

KEYWORDS = %w(
FROM MAINTAINER CMD LABEL EXPOSE ENV ADD COPY ENTRYPOINT VOLUME USER WORKDIR ARG STOPSIGNAL HEALTHCHECK SHELL
FROM MAINTAINER CMD EXPOSE ADD COPY ENTRYPOINT VOLUME USER WORKDIR ARG STOPSIGNAL HEALTHCHECK SHELL
).join('|')

start { @shell = Shell.new(@options) }
Expand Down Expand Up @@ -40,16 +40,37 @@ class Docker < RegexLexer
@shell.reset!
end

rule %r/^(LABEL|ENV)(\s+)/i do
token Keyword
push :identifier
end

rule %r/\w+/, Text
rule %r/[^\w]+/, Text
rule %r/./, Text
end

state :run do
rule %r/\n/, Text, :pop!
rule %r/^\s*#.*\n/, Comment
rule %r/\\./m, Str::Escape
rule(/(\\.|[^\n\\])+/) { delegate @shell }
end

state :identifier do
rule %r/\n/, Text, :pop!
rule %r/^\s*#.*\n/, Comment
rule %r/\s*\\./m, Str::Escape
rule %r/(\s*(?:[^\s=]+|"[^"]+"|'[^']+'))(=)/ do
groups Name::Property, Punctuation
push :value
end
end

state :value do
rule %r/\n/, Text, :pop!
rule %r/(".*?")|('.*?')|((?:[^\\\s]|\\\s)+)/m, Str, :pop!
end
end
end
end
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