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rake.rb
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rake.rb
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require 'rdoc/parser/ruby'
##
# Maps task builders like Hoe or RDoc::Task to an RDoc::Include
class RDoc::RakeBuilder < RDoc::Include
end
##
# Maps a Rake namespace to an RDoc::NormalModule
class RDoc::RakeNamespace < RDoc::NormalModule
end
##
# Maps a Rake::Task to an RDoc::AnyMethod
class RDoc::RakeTask < RDoc::AnyMethod
attr_accessor :dependencies
def initialize(*args)
super
@dependencies = []
end
end
##
# An RDoc parser for Rakefiles.
class RDoc::Parser::Rake < RDoc::Parser
VERSION = '1.0.1'
include RDoc::RubyToken
include RDoc::TokenStream
include RDoc::Parser::RubyTools
parse_files_matching(/Rakefile(\.rb)?$/i)
parse_files_matching(/\.rake$/)
def initialize(top_level, file_name, content, options, stats)
super
@size = 0
@token_listeners = nil
@scanner = RDoc::RubyLex.new content, @options
@scanner.exception_on_syntax_error = false
@rake_tasks = @top_level.add_module RDoc::RakeNamespace, 'Rake Tasks'
@prev_seek = nil
reset
end
##
# Consumes an Array
def consume_array
tokens = get_tk_until TkRBRACK
tokens << get_tk
tokens
end
##
# Consumes the body of a task
def consume_body
seen_nest = false
nest = 0
body = []
while tk = get_tk do
body << tk
case tk
when TkDO, TkCLASS, TkMODULE, TkDEF, TkBEGIN, TkIF, TkUNLESS, TkCASE,
TkWHILE, TkUNTIL, TkFOR then
nest += 1
seen_nest = true
when TkEND then
nest -= 1
when TkNL then
break unless seen_nest
end
break if nest == 0 and seen_nest
end
body
end
##
# Consumes arguments to a task
def consume_task_arguments
skip_tkspace false
tk = get_tk
case tk
when TkNL, TkDO then
unget_tk tk
when TkASSIGN then
get_tk # finish assoc, lexer bug
skip_tkspace
case tk = get_tk
when TkLBRACK then
tokens = consume_array
tokens = tokens.select do |token| TkSYMBOL === token end
tokens = tokens.map do |token| token.to_sym end
@task.dependencies.push(*tokens)
when TkSYMBOL then # ok
@task.dependencies << tk.to_sym
else
puts :task_arg => tk
end
end
end
##
# Parses a Rake description
#
# desc "My cool task"
def parse_description
skip_tkspace
tk = get_tk
@desc = tk.text[1..-2]
end
##
# Parses a Rake namespace
#
# namespace "doc"
def parse_namespace
skip_tkspace
tk = get_tk
namespace = @container.add_module RDoc::RakeNamespace, tk.text[1..-1]
skip_tkspace
old_namespace = @container
begin
@nest += 1
@container = namespace
parse_rakefile
ensure
@container = old_namespace
@nest -= 1
end
end
##
# Parses a Rake task
#
# task "my_cool_task"
def parse_task(tk)
collect_tokens
add_token tk
token_listener self do
skip_tkspace false
tk = get_tk
name = tk.text
@task = @container.find_instance_method_named name
unless @task then
@task = RDoc::RakeTask.new tokens_to_s, name
@container.add_method @task
@stats.add_method @task
end
@task.comment += use_desc
consume_task_arguments
end
@task.collect_tokens
@task.add_tokens token_stream
token_listener @task do
consume_body
end
@task
end
##
# Parses a Rake task builder
#
# Hoe.new 'my_cool_project' do # ...
def parse_task_builder(tk)
name = tk.name
if 'ENV' == name then
get_tk_until TkNL
return
end
get_tk_until TkDO, TkNL
tk = get_tk
case tk
when TkDO then
unget_tk tk
consume_body
end
builder = RDoc::RakeBuilder.new name, ''
@container.add_include builder
end
##
# Parses a Rakefile
def parse_rakefile
current_nest = @nest
while tk = get_tk do
case tk
when TkCONSTANT then
parse_task_builder tk
when TkDO then
@nest += 1
when TkEND then
@nest -= 1
break if current_nest > 0 and @nest <= current_nest
when TkIDENTIFIER then
case tk.name
when 'desc' then
parse_description
when 'task' then
parse_task(tk)
when 'namespace' then
parse_namespace
when 'require' then
parse_require
#else
# p :ident => tk
end
when TkNL, TkSPACE then # ignore
#else
# p :unhandled => tk
end
end
end
##
# Adds a new RDoc::Require to the container
def parse_require
skip_tkspace false
tk = get_tk
name = tk.text if TkSTRING === tk
if name then
@container.add_require RDoc::Require.new(name, '')
else
unget_tk tk
end
end
##
# Performs the work of parsing a rakefile
def scan
reset
@container = @rake_tasks
@stats.add_module @container
catch :eof do
catch :enddoc do
parse_rakefile
end
end
@top_level
end
##
# Uses the last description encountered
def use_desc
desc = @desc
@desc = nil
desc || ''
end
end