Module: DebugMcp::SourceTagging

Defined in:
lib/debug_mcp/source_tagging.rb

Constant Summary collapse

SOURCE_KEY = 
":_debug_mcp_event_source"
STACK_KEY = 
":_debug_mcp_event_source_stack"
DEBUG_EVAL_SOURCE = 
":debug_eval"

Class Method Summary collapse

Class Method Details

.wrap(code) ⇒ Object

Wrap a Ruby expression so ActiveSupport::Notifications events fired during its evaluation are tagged with source: :debug_eval.

Uses a Thread-local stack rather than a local variable so nested wraps within a single eval are safe — each push/pop pair restores the correct previous value even when wraps share the same call frame.

The wrapped expression evaluates to the same value as the original.



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# File 'lib/debug_mcp/source_tagging.rb', line 18

def wrap(code)
  "begin; " \
  "(::Thread.current[#{STACK_KEY}] ||= []) << ::Thread.current[#{SOURCE_KEY}]; " \
  "::Thread.current[#{SOURCE_KEY}]=#{DEBUG_EVAL_SOURCE}; " \
  "(#{code}); " \
  "ensure ::Thread.current[#{SOURCE_KEY}]=::Thread.current[#{STACK_KEY}].pop; end"
end