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|
# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
module Lexers
class Nix < RegexLexer
title 'Nix'
desc 'The Nix expression language (https://nixos.org/nix/manual/#ch-expression-language)'
tag 'nix'
aliases 'nixos'
filenames '*.nix'
state :whitespaces do
rule %r/^\s*\n\s*$/m, Text
rule %r/\s+/, Text
end
state :comment do
rule %r/#.*$/, Comment
rule %r(/\*), Comment, :multiline_comment
end
state :multiline_comment do
rule %r(\*/), Comment, :pop!
rule %r/./, Comment
end
state :number do
rule %r/[0-9]/, Num::Integer
end
state :null do
rule %r/(null)/, Keyword::Constant
end
state :boolean do
rule %r/(true|false)/, Keyword::Constant
end
state :binding do
rule %r/[a-zA-Z_][a-zA-Z0-9-]*/, Name::Variable
end
state :path do
word = "[a-zA-Z0-9\._-]+"
section = "(\/#{word})"
prefix = "[a-z\+]+:\/\/"
root = /#{section}+/.source
tilde = /~#{section}+/.source
basic = /#{word}(\/#{word})+/.source
url = /#{prefix}(\/?#{basic})/.source
rule %r/(#{root}|#{tilde}|#{basic}|#{url})/, Str::Other
end
state :string do
rule %r/"/, Str::Double, :double_quoted_string
rule %r/''/, Str::Double, :indented_string
end
state :string_content do
rule %r/\\./, Str::Escape
rule %r/\$\$/, Str::Escape
rule %r/\${/, Str::Interpol, :string_interpolated_arg
end
state :indented_string_content do
rule %r/'''/, Str::Escape
rule %r/''\$/, Str::Escape
rule %r/\$\$/, Str::Escape
rule %r/''\\./, Str::Escape
rule %r/\${/, Str::Interpol, :string_interpolated_arg
end
state :string_interpolated_arg do
mixin :expression
rule %r/}/, Str::Interpol, :pop!
end
state :indented_string do
mixin :indented_string_content
rule %r/''/, Str::Double, :pop!
rule %r/./, Str::Double
end
state :double_quoted_string do
mixin :string_content
rule %r/"/, Str::Double, :pop!
rule %r/./, Str::Double
end
state :operator do
rule %r/(\.|\?|\+\+|\+|!=|!|\/\/|\=\=|&&|\|\||->|\/|\*|-|<|>|<=|=>)/, Operator
end
state :assignment do
rule %r/(=)/, Operator
rule %r/(@)/, Operator
end
state :accessor do
rule %r/(\$)/, Punctuation
end
state :delimiter do
rule %r/(;|,|:)/, Punctuation
end
state :atom_content do
mixin :expression
rule %r/\)/, Punctuation, :pop!
end
state :atom do
rule %r/\(/, Punctuation, :atom_content
end
state :list do
rule %r/\[/, Punctuation, :list_content
end
state :list_content do
rule %r/\]/, Punctuation, :pop!
mixin :expression
end
state :set do
rule %r/{/, Punctuation, :set_content
end
state :set_content do
rule %r/}/, Punctuation, :pop!
mixin :expression
end
state :expression do
mixin :ignore
mixin :comment
mixin :boolean
mixin :null
mixin :number
mixin :path
mixin :string
mixin :keywords
mixin :operator
mixin :accessor
mixin :assignment
mixin :delimiter
mixin :binding
mixin :atom
mixin :set
mixin :list
end
state :keywords do
mixin :keywords_namespace
mixin :keywords_declaration
mixin :keywords_conditional
mixin :keywords_reserved
mixin :keywords_builtin
end
state :keywords_namespace do
keywords = %w(with in inherit)
rule %r/(?:#{keywords.join('|')})\b/, Keyword::Namespace
end
state :keywords_declaration do
keywords = %w(let)
rule %r/(?:#{keywords.join('|')})\b/, Keyword::Declaration
end
state :keywords_conditional do
keywords = %w(if then else)
rule %r/(?:#{keywords.join('|')})\b/, Keyword
end
state :keywords_reserved do
keywords = %w(rec assert map)
rule %r/(?:#{keywords.join('|')})\b/, Keyword::Reserved
end
state :keywords_builtin do
keywords = %w(
abort
baseNameOf
builtins
derivation
fetchTarball
import
isNull
removeAttrs
throw
toString
)
rule %r/(?:#{keywords.join('|')})\b/, Keyword::Reserved
end
state :ignore do
mixin :whitespaces
end
state :root do
mixin :ignore
mixin :expression
end
start do
end
end
end
end
|
