Class: Shirobai::Cop::Layout::EmptyLines

Inherits:
RuboCop::Cop::Base
  • Object
show all
Extended by:
RuboCop::Cop::AutoCorrector
Includes:
RuboCop::Cop::RangeHelp, BundleEligible
Defined in:
lib/shirobai/cop/layout/empty_lines.rb

Overview

Drop-in Rust reimplementation of Layout/EmptyLines.

Stock's on_new_investigation walks processed_source.tokens and yields a 1-byte source_range(buffer, line, 0) for every line L whose previous and current text lines are both empty AND that falls inside a gap of cur_token_line - prev_token_line > 2. The corrector removes that 1-byte range (the \n at column 0 of the offending line).

The Rust side reconstructs "lines with parser-gem tokens" from the prism AST plus comments (see crates/shirobai-core/src/rules/empty_lines.rs for the equivalence rules — string-content nodes fill their span, container nodes mark only open/close lines, etc.) and runs the same gap-scan stock does. It returns the offense byte ranges; the wrapper turns each into a Parser::Source::Range, attaches the same MSG, and removes the range.

Bundle-eligible only when the parser-normalized buffer.source is byte-identical to raw_source (no CRLF / BOM normalization). On CRLF or BOM the standalone entry point scans buffer.source directly so every returned offset still indexes into the parser-gem buffer.

Constant Summary collapse

MSG = 
"Extra blank line detected."

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.badge ⇒ Object 



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# File 'lib/shirobai/cop/layout/empty_lines.rb', line 33

def self.badge = RuboCop::Cop::Badge.parse(cop_name)

.bundle_args(_config) ⇒ Object

The cop is config-less from the Rust side — bundle_args returns an empty pair so it contributes nothing to nums / lists. Kept for the 4+1 single-source-of-config convention.



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# File 'lib/shirobai/cop/layout/empty_lines.rb', line 38

def self.bundle_args(_config)
  []
end

.cop_name ⇒ Object 



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# File 'lib/shirobai/cop/layout/empty_lines.rb', line 32

def self.cop_name = "Layout/EmptyLines"

Instance Method Details

#on_new_investigation ⇒ Object 



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# File 'lib/shirobai/cop/layout/empty_lines.rb', line 42

def on_new_investigation
  buffer = processed_source.buffer
  # On the bundle path Rust scanned `raw_source` (byte-identical to
  # `buffer.source`); on the CRLF/BOM fallback the standalone path
  # scans `buffer.source` instead so every offset Rust returns lines
  # up with the parser-gem buffer.
  source = bundle_eligible? ? processed_source.raw_source : buffer.source
  off = SourceOffsets.for(source)
  resolved_offenses.each do |start, fin|
    range = Parser::Source::Range.new(buffer, off[start], off[fin])
    add_offense(range, message: MSG) do |corrector|
      corrector.remove(range)
    end
  end
end