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|
# frozen_string_literal: true
module Rouge
module Lexers
class Prometheus < RegexLexer
desc 'prometheus'
tag 'prometheus'
aliases 'prometheus'
filenames '*.prometheus'
mimetypes 'text/x-prometheus', 'application/x-prometheus'
def self.functions
@functions ||= Set.new %w(
abs absent ceil changes clamp_max clamp_min count_scalar day_of_month
day_of_week days_in_month delta deriv drop_common_labels exp floor
histogram_quantile holt_winters hour idelta increase irate label_replace
ln log2 log10 month predict_linear rate resets round scalar sort
sort_desc sqrt time vector year avg_over_time min_over_time
max_over_time sum_over_time count_over_time quantile_over_time
stddev_over_time stdvar_over_time
)
end
state :root do
mixin :strings
mixin :whitespace
rule %r/-?\d+\.\d+/, Num::Float
rule %r/-?\d+[smhdwy]?/, Num::Integer
mixin :operators
rule %r/(ignoring|on)(\()/ do
groups Keyword::Pseudo, Punctuation
push :label_list
end
rule %r/(group_left|group_right)(\()/ do
groups Keyword::Type, Punctuation
end
rule %r/(bool|offset)\b/, Keyword
rule %r/(without|by)\b/, Keyword, :label_list
rule %r/[\w:]+/ do |m|
if self.class.functions.include?(m[0])
token Name::Builtin
else
token Name
end
end
mixin :metrics
end
state :metrics do
rule %r/[a-zA-Z0-9_-]+/, Name
rule %r/[\(\)\]:.,]/, Punctuation
rule %r/\{/, Punctuation, :filters
rule %r/\[/, Punctuation
end
state :strings do
rule %r/"/, Str::Double, :double_string_escaped
rule %r/'/, Str::Single, :single_string_escaped
rule %r/`.*`/, Str::Backtick
end
[
[:double, Str::Double, '"'],
[:single, Str::Single, "'"]
].each do |name, tok, fin|
state :"#{name}_string_escaped" do
rule %r/\\[\\abfnrtv#{fin}]/, Str::Escape
rule %r/[^\\#{fin}]+/m, tok
rule %r/#{fin}/, tok, :pop!
end
end
state :filters do
mixin :inline_whitespace
rule %r/,/, Punctuation
mixin :labels
mixin :filter_matching_operators
mixin :strings
rule %r/}/, Punctuation, :pop!
end
state :label_list do
rule %r/\(/, Punctuation
rule %r/[a-zA-Z0-9_:-]+/, Name::Attribute
rule %r/,/, Punctuation
mixin :whitespace
rule %r/\)/, Punctuation, :pop!
end
state :labels do
rule %r/[a-zA-Z0-9_:-]+/, Name::Attribute
end
state :operators do
rule %r([+\-\*/%\^]), Operator # Arithmetic
rule %r(=|==|!=|<|>|<=|>=), Operator # Comparison
rule %r/and|or|unless/, Operator # Logical/Set
rule %r/(sum|min|max|avg|stddev|stdvar|count|count_values|bottomk|topk)\b/, Name::Function
end
state :filter_matching_operators do
rule %r/!(=|~)|=~?/, Operator
end
state :inline_whitespace do
rule %r/[ \t\r]+/, Text
end
state :whitespace do
mixin :inline_whitespace
rule %r/\n\s*/m, Text
rule %r/#.*?$/, Comment
end
end
end
end
|
