module Hoe::Racc
Racc plugin for hoe.
Tasks Provided:¶ ↑
- lexer
-
Generate lexers for all .rex files in your Manifest.txt.
- parser
-
Generate parsers for all .y files in your Manifest.txt.
- .y -> .rb rule
-
Generate a parser using racc.
- .rex -> .rb rule
-
Generate a lexer using rexical.
Attributes
racc_flags[RW]
Optional: Defines what flags to use for racc. default: “-v -l”
racc_tasks[RW]
Optional: Defines what tasks need to generate parsers/lexers first.
Defaults to [:multi, :test, :check_manifest]
If you have extra tasks that require your parser/lexer to be built, add their names here in your hoe spec. eg:
racc_tasks << :debug
rex_flags[RW]
Optional: Defines what flags to use for rex. default: “–independent”
Public Instance Methods
define_racc_tasks()
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Define tasks for racc plugin
# File lib/hoe/racc.rb, line 52 def define_racc_tasks racc_files = self.spec.files.find_all { |f| f =~ /\.y$/ } rex_files = self.spec.files.find_all { |f| f =~ /\.rex$/ } parser_files = racc_files.map { |f| f.sub(/\.y$/, ".rb") } lexer_files = rex_files.map { |f| f.sub(/\.rex$/, ".rb") } self.clean_globs += parser_files self.clean_globs += lexer_files rule ".rb" => ".y" do |t| begin sh "racc #{racc_flags} -o #{t.name} #{t.source}" rescue abort "need racc, sudo gem install racc" end end rule ".rb" => ".rex" do |t| begin sh "rex #{rex_flags} -o #{t.name} #{t.source}" rescue abort "need rexical, sudo gem install rexical" end end desc "build the parser" unless parser_files.empty? task :parser desc "build the lexer" unless lexer_files.empty? task :lexer task :parser => parser_files task :lexer => lexer_files racc_tasks.each do |t| task t => [:parser, :lexer] end end
initialize_racc()
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Initialize variables for racc plugin.
# File lib/hoe/racc.rb, line 38 def initialize_racc self.racc_tasks = [:multi, :test, :check_manifest] # -v = verbose # -l = no-line-convert (they don't ever line up anyhow) self.racc_flags ||= "-v -l" self.rex_flags ||= "--independent" dependency 'racc', '~> 1.4.6', :development end