Class: Shirobai::Cop::Layout::ElseAlignment

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

Overview

Drop-in Rust reimplementation of ‘Layout/ElseAlignment`.

Rust walks the AST once, reproducing stock’s callbacks: ‘on_if` / `on_case` / `on_case_match` / `on_rescue` and the `CheckAssignment` family. Each `else` / `elsif` keyword (and the `else` of a `case` / `begin` / `def` / block `rescue` chain) is checked against the construct it belongs to; `elsif` chains carry the same base down the recursion, and an `if` on an assignment RHS aligns with the assignment node (`variable`) or the `if` (`keyword`) per `Layout/EndAlignment`’s ‘EnforcedStyleAlignWith`. Per misaligned keyword Rust returns the keyword range, the formatted message, and the signed column delta.

The autocorrect mirrors ‘AlignmentCorrector.correct` for the single-line keyword range: shift the keyword’s line by the column delta (insert spaces at the line start for a positive delta, remove leading whitespace for a negative one). As in stock, the correction is skipped (offense still registered) when ‘Layout/IndentationStyle` is `tabs`.

Offenses come from the per-file bundled run (‘Shirobai::Dispatch`); the behaviour is purely config-driven, so this cop is always bundle eligible.

Constant Summary collapse

STYLE_TO_U8 = 
{ keyword: 0, variable: 1, start_of_line: 2 }.freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.badge ⇒ Object 



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

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

.bundle_args(config) ⇒ Object

Packed args for the bundled run: ‘[style]`. `ElseAlignment` reads `Layout/EndAlignment`’s ‘EnforcedStyleAlignWith` (default `keyword`).



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# File 'lib/shirobai/cop/layout/else_alignment.rb', line 37

def self.bundle_args(config)
  align = config.for_cop("Layout/EndAlignment")["EnforcedStyleAlignWith"]
  [STYLE_TO_U8.fetch((align || "keyword").to_sym, 0)]
end

.cop_name ⇒ Object 



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

def self.cop_name = "Layout/ElseAlignment"

Instance Method Details

#on_new_investigation ⇒ Object 



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

def on_new_investigation
  buffer = processed_source.buffer
  off = SourceOffsets.for(processed_source.raw_source)
  tabs = using_tabs?

  records_for_source.each do |else_start, else_end, message, column_delta|
    else_range = Parser::Source::Range.new(buffer, off[else_start], off[else_end])
    add_offense(else_range, message: message) do |corrector|
      next if tabs

      align_keyword(corrector, buffer, else_range, column_delta)
    end
  end
end