85 lines
2.0 KiB
Ruby
85 lines
2.0 KiB
Ruby
# frozen_string_literal: false
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#
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# irb/lib/tracer.rb -
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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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begin
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require "tracer"
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rescue LoadError
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$stderr.puts "Tracer extension of IRB is enabled but tracer gem doesn't found."
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module IRB
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TracerLoadError = true
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class Context
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def use_tracer=(opt)
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# do nothing
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end
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end
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end
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return # This is about to disable loading below
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end
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module IRB
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# initialize tracing function
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def IRB.initialize_tracer
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Tracer.verbose = false
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Tracer.add_filter {
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|event, file, line, id, binding, *rests|
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/^#{Regexp.quote(@CONF[:IRB_LIB_PATH])}/ !~ file and
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File::basename(file) != "irb.rb"
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}
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end
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class Context
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# Whether Tracer is used when evaluating statements in this context.
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#
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# See +lib/tracer.rb+ for more information.
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attr_reader :use_tracer
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alias use_tracer? use_tracer
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# Sets whether or not to use the Tracer library when evaluating statements
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# in this context.
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#
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# See +lib/tracer.rb+ for more information.
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def use_tracer=(opt)
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if opt
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Tracer.set_get_line_procs(@irb_path) {
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|line_no, *rests|
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@io.line(line_no)
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}
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elsif !opt && @use_tracer
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Tracer.off
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end
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@use_tracer=opt
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end
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end
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class WorkSpace
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alias __evaluate__ evaluate
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# Evaluate the context of this workspace and use the Tracer library to
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# output the exact lines of code are being executed in chronological order.
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#
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# See +lib/tracer.rb+ for more information.
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def evaluate(context, statements, file = nil, line = nil)
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if context.use_tracer? && file != nil && line != nil
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Tracer.on
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begin
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__evaluate__(context, statements, file, line)
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ensure
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Tracer.off
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end
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else
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__evaluate__(context, statements, file || __FILE__, line || __LINE__)
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end
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end
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end
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IRB.initialize_tracer
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end
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