Class: Canon::Commands::DiffCommand

Inherits:
Object
  • Object
show all
Defined in:
lib/canon/commands/diff_command.rb

Overview

Command for semantic diffing of two files

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ DiffCommand

Returns a new instance of DiffCommand.



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# File 'lib/canon/commands/diff_command.rb', line 13

def initialize(options = {})
  @options = options
end

Instance Method Details

#run(file1, file2) ⇒ Object

rubocop:disable Metrics/MethodLength rubocop:disable Metrics/AbcSize



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# File 'lib/canon/commands/diff_command.rb', line 19

def run(file1, file2)
  # Detect formats
  format1 = @options[:format1] || @options[:format] || detect_format(file1)
  format2 = @options[:format2] || @options[:format] || detect_format(file2)

  # Check file sizes before reading
  check_file_size(file1, format1)
  check_file_size(file2, format2)

  # Read raw content for potential by-line diff
  content1 = File.read(file1, encoding: "utf-8")
  content2 = File.read(file2, encoding: "utf-8")

  # Parse documents
  doc1 = parse_document_content(content1, format1)
  doc2 = parse_document_content(content2, format2)

  # Build comparison options
  comp_opts = build_comparison_options

  # Perform semantic comparison
  result = Canon::Comparison.equivalent?(doc1, doc2, comp_opts)

  # Determine diff mode
  mode = determine_mode(format1)

  # Prepare formatted content for by-line mode
  formatted1, formatted2 = prepare_formatted_content(
    content1, content2, format1, mode
  )

  # Format and output results
  formatter = Canon::DiffFormatter.new(
    use_color: resolve_color_option,
    mode: mode,
    context_lines: @options.fetch(:context_lines, 3),
    diff_grouping_lines: @options[:diff_grouping_lines],
    show_diffs: @options[:show_diffs]&.to_sym || :all,
    show_raw_inputs: @options[:show_raw_inputs] || false,
    show_preprocessed_inputs: @options[:show_preprocessed_inputs] || false,
    show_preprocessed_expected: @options[:show_preprocessed_expected] || false,
    show_preprocessed_received: @options[:show_preprocessed_received] || false,
    show_prettyprint_inputs: @options[:show_prettyprint_inputs] || false,
    show_prettyprint_expected: @options[:show_prettyprint_expected] || false,
    show_prettyprint_received: @options[:show_prettyprint_received] || false,
    show_line_numbered_inputs: @options[:show_line_numbered_inputs] || false,
  )

  # Show configuration in verbose mode using shared DebugOutput
  if @options[:verbose]
    require_relative "../diff_formatter/debug_output"
    config_output = Canon::DiffFormatter::DebugOutput.verbose_tables_only(
      result,
      {
        use_color: resolve_color_option,
        mode: mode,
        context_lines: @options.fetch(:context_lines, 3),
        diff_grouping_lines: @options[:diff_grouping_lines],
        show_diffs: @options[:show_diffs]&.to_sym || :all,
        verbose_diff: true, # Enable verbose table output
      },
    )
    puts config_output unless config_output.empty?
  end

  # Always show diff when files are not equivalent
  # result is always a ComparisonResult object when verbose: true
  output = formatter.format(
    result,
    format1,
    doc1: formatted1,
    doc2: formatted2,
  )
  puts output
  exit result.equivalent? ? 0 : 1
rescue Errno::ENOENT => e
  abort "Error: #{e.message}"
rescue JSON::ParserError => e
  abort "Error parsing JSON: #{e.message}"
rescue Psych::SyntaxError => e
  abort "Error parsing YAML: #{e.message}"
rescue Canon::Error => e
  abort "Error: #{e.message}"
rescue StandardError => e
  abort "Error processing files: #{e.message}"
end