зеркало из https://github.com/github/ruby.git
353 строки
8.3 KiB
Ruby
353 строки
8.3 KiB
Ruby
#
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# irb.rb - irb main module
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# $Release Version: 0.9.6 $
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# $Revision$
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# by Keiju ISHITSUKA(keiju@ruby-lang.org)
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#
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# --
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#
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#
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#
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require "e2mmap"
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require "irb/init"
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require "irb/context"
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require "irb/extend-command"
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#require "irb/workspace"
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require "irb/ruby-lex"
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require "irb/input-method"
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require "irb/locale"
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STDOUT.sync = true
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module IRB
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@RCS_ID='-$Id$-'
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class Abort < Exception;end
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#
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@CONF = {}
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def IRB.conf
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@CONF
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end
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# IRB version method
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def IRB.version
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if v = @CONF[:VERSION] then return v end
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require "irb/version"
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rv = @RELEASE_VERSION.sub(/\.0/, "")
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@CONF[:VERSION] = format("irb %s(%s)", rv, @LAST_UPDATE_DATE)
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end
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def IRB.CurrentContext
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IRB.conf[:MAIN_CONTEXT]
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end
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# initialize IRB and start TOP_LEVEL irb
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def IRB.start(ap_path = nil)
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$0 = File::basename(ap_path, ".rb") if ap_path
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IRB.setup(ap_path)
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if @CONF[:SCRIPT]
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irb = Irb.new(nil, @CONF[:SCRIPT])
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else
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irb = Irb.new
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end
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@CONF[:IRB_RC].call(irb.context) if @CONF[:IRB_RC]
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@CONF[:MAIN_CONTEXT] = irb.context
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trap("SIGINT") do
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irb.signal_handle
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end
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begin
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catch(:IRB_EXIT) do
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irb.eval_input
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end
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ensure
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irb_at_exit
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end
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# print "\n"
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end
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def IRB.irb_at_exit
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@CONF[:AT_EXIT].each{|hook| hook.call}
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end
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def IRB.irb_exit(irb, ret)
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throw :IRB_EXIT, ret
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end
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def IRB.irb_abort(irb, exception = Abort)
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if defined? Thread
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irb.context.thread.raise exception, "abort then interrupt!"
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else
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raise exception, "abort then interrupt!"
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end
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end
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#
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# irb interpreter main routine
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#
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class Irb
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def initialize(workspace = nil, input_method = nil, output_method = nil)
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@context = Context.new(self, workspace, input_method, output_method)
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@context.main.extend ExtendCommandBundle
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@signal_status = :IN_IRB
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@scanner = RubyLex.new
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@scanner.exception_on_syntax_error = false
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end
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attr_reader :context
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attr_accessor :scanner
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def eval_input
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@scanner.set_prompt do
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|ltype, indent, continue, line_no|
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if ltype
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f = @context.prompt_s
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elsif continue
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f = @context.prompt_c
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elsif indent > 0
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f = @context.prompt_n
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else
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f = @context.prompt_i
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end
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f = "" unless f
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if @context.prompting?
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@context.io.prompt = p = prompt(f, ltype, indent, line_no)
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else
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@context.io.prompt = p = ""
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end
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if @context.auto_indent_mode
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unless ltype
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ind = prompt(@context.prompt_i, ltype, indent, line_no)[/.*\z/].size +
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indent * 2 - p.size
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ind += 2 if continue
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@context.io.prompt = p + " " * ind if ind > 0
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end
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end
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end
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@scanner.set_input(@context.io) do
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signal_status(:IN_INPUT) do
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if l = @context.io.gets
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print l if @context.verbose?
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else
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if @context.ignore_eof? and @context.io.readable_atfer_eof?
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l = "\n"
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if @context.verbose?
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printf "Use \"exit\" to leave %s\n", @context.ap_name
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end
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else
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print "\n"
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end
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end
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l
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end
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end
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@scanner.each_top_level_statement do |line, line_no|
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signal_status(:IN_EVAL) do
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begin
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line.untaint
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@context.evaluate(line, line_no)
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output_value if @context.echo?
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exc = nil
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rescue Interrupt => exc
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rescue SystemExit, SignalException
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raise
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rescue Exception => exc
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end
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if exc
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print exc.class, ": ", exc, "\n"
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if exc.backtrace[0] =~ /irb(2)?(\/.*|-.*|\.rb)?:/ && exc.class.to_s !~ /^IRB/ &&
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!(SyntaxError === exc)
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irb_bug = true
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else
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irb_bug = false
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end
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messages = []
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lasts = []
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levels = 0
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for m in exc.backtrace
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m = @context.workspace.filter_backtrace(m) unless irb_bug
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if m
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if messages.size < @context.back_trace_limit
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messages.push "\tfrom "+m
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else
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lasts.push "\tfrom "+m
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if lasts.size > @context.back_trace_limit
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lasts.shift
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levels += 1
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end
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end
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end
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end
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print messages.join("\n"), "\n"
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unless lasts.empty?
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printf "... %d levels...\n", levels if levels > 0
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print lasts.join("\n")
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end
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print "Maybe IRB bug!\n" if irb_bug
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end
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if $SAFE > 2
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abort "Error: irb does not work for $SAFE level higher than 2"
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end
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end
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end
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end
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def suspend_name(path = nil, name = nil)
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@context.irb_path, back_path = path, @context.irb_path if path
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@context.irb_name, back_name = name, @context.irb_name if name
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begin
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yield back_path, back_name
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ensure
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@context.irb_path = back_path if path
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@context.irb_name = back_name if name
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end
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end
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def suspend_workspace(workspace)
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@context.workspace, back_workspace = workspace, @context.workspace
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begin
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yield back_workspace
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ensure
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@context.workspace = back_workspace
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end
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end
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def suspend_input_method(input_method)
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back_io = @context.io
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@context.instance_eval{@io = input_method}
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begin
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yield back_io
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ensure
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@context.instance_eval{@io = back_io}
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end
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end
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def suspend_context(context)
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@context, back_context = context, @context
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begin
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yield back_context
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ensure
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@context = back_context
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end
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end
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def signal_handle
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unless @context.ignore_sigint?
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print "\nabort!\n" if @context.verbose?
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exit
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end
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case @signal_status
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when :IN_INPUT
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print "^C\n"
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raise RubyLex::TerminateLineInput
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when :IN_EVAL
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IRB.irb_abort(self)
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when :IN_LOAD
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IRB.irb_abort(self, LoadAbort)
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when :IN_IRB
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# ignore
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else
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# ignore other cases as well
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end
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end
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def signal_status(status)
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return yield if @signal_status == :IN_LOAD
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signal_status_back = @signal_status
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@signal_status = status
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begin
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yield
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ensure
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@signal_status = signal_status_back
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end
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end
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def prompt(prompt, ltype, indent, line_no)
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p = prompt.dup
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p.gsub!(/%([0-9]+)?([a-zA-Z])/) do
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case $2
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when "N"
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@context.irb_name
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when "m"
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@context.main.to_s
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when "M"
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@context.main.inspect
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when "l"
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ltype
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when "i"
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if $1
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format("%" + $1 + "d", indent)
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else
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indent.to_s
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end
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when "n"
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if $1
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format("%" + $1 + "d", line_no)
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else
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line_no.to_s
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end
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when "%"
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"%"
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end
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end
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p
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end
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def output_value
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printf @context.return_format, @context.inspect_last_value
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end
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def inspect
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ary = []
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for iv in instance_variables
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case (iv = iv.to_s)
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when "@signal_status"
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ary.push format("%s=:%s", iv, @signal_status.id2name)
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when "@context"
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ary.push format("%s=%s", iv, eval(iv).__to_s__)
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else
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ary.push format("%s=%s", iv, eval(iv))
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end
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end
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format("#<%s: %s>", self.class, ary.join(", "))
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end
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end
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# Singleton method
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def @CONF.inspect
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IRB.version unless self[:VERSION]
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array = []
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for k, v in sort{|a1, a2| a1[0].id2name <=> a2[0].id2name}
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case k
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when :MAIN_CONTEXT, :__TMP__EHV__
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array.push format("CONF[:%s]=...myself...", k.id2name)
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when :PROMPT
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s = v.collect{
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|kk, vv|
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ss = vv.collect{|kkk, vvv| ":#{kkk.id2name}=>#{vvv.inspect}"}
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format(":%s=>{%s}", kk.id2name, ss.join(", "))
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}
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array.push format("CONF[:%s]={%s}", k.id2name, s.join(", "))
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else
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array.push format("CONF[:%s]=%s", k.id2name, v.inspect)
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end
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end
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array.join("\n")
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end
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end
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