Class: Synthra::CLI::Commands::Diff

Inherits:
Base
  • Object
show all
Defined in:
lib/synthra/cli/commands/diff.rb

Overview

Diff command - compares schema versions

Examples:

synthra diff schemas/v1/ schemas/v2/
synthra diff schemas/v1/ schemas/v2/ --breaking-only

Instance Method Summary collapse

Constructor Details

This class inherits a constructor from Synthra::CLI::Commands::Base

Instance Method Details

#call ⇒ Object 



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# File 'lib/synthra/cli/commands/diff.rb', line 13

def call
  path1 = args.shift
  path2 = args.shift

  unless path1 && path2
    error "Usage: synthra diff <path1> <path2> [--breaking-only]"
    return EXIT_PARSE_ERROR
  end

  registry1 = Registry.new
  registry2 = Registry.new

  load_path(registry1, path1)
  load_path(registry2, path2)

  changes = compute_diff(registry1, registry2)

  if options[:breaking_only]
    display_breaking_changes(changes, path1, path2)
  else
    display_full_diff(changes, path1, path2)
  end
end

#compare_schemas(s1, s2) ⇒ Object (private) 



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# File 'lib/synthra/cli/commands/diff.rb', line 128

def compare_schemas(s1, s2)
  diff = []

  # Compare versions
  if s1.version != s2.version
    diff << "version: #{s1.version || 'nil'} → #{s2.version || 'nil'}"
  end

  # Compare deprecation
  if s1.deprecated? != s2.deprecated?
    diff << "deprecated: #{s1.deprecated?} → #{s2.deprecated?}"
  end

  # Compare fields
  f1_names = s1.fields.map(&:name)
  f2_names = s2.fields.map(&:name)

  (f2_names - f1_names).each { |f| diff << "+ field: #{f}" }
  (f1_names - f2_names).each { |f| diff << "- field: #{f}" }

  # Compare field types
  (f1_names & f2_names).each do |name|
    field1 = s1.field(name)
    field2 = s2.field(name)
    if field1.type_name != field2.type_name
      diff << "~ #{name}: #{field1.type_name} → #{field2.type_name}"
    end
  end

  diff
end

#compute_breaking_changes(schemas1, schemas2, all_names) ⇒ Object (private) 



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# File 'lib/synthra/cli/commands/diff.rb', line 69

def compute_breaking_changes(schemas1, schemas2, all_names)
  breaking = []

  # Removed schemas are breaking
  (schemas1.keys - schemas2.keys).each do |name|
    breaking << { schema: name, type: :schema_removed, message: "Schema '#{name}' removed" }
  end

  # Check field changes
  (schemas1.keys & schemas2.keys).each do |name|
    s1 = schemas1[name]
    s2 = schemas2[name]

    # Removed fields are breaking
    f1_names = s1.fields.map(&:name)
    f2_names = s2.fields.map(&:name)

    (f1_names - f2_names).each do |field_name|
      breaking << {
        schema: name,
        type: :field_removed,
        field: field_name,
        message: "Field '#{field_name}' removed from '#{name}'"
      }
    end

    # Type changes are breaking
    (f1_names & f2_names).each do |field_name|
      field1 = s1.field(field_name)
      field2 = s2.field(field_name)

      if field1.type_name != field2.type_name
        breaking << {
          schema: name,
          type: :type_changed,
          field: field_name,
          from: field1.type_name,
          to: field2.type_name,
          message: "Field '#{field_name}' type changed: #{field1.type_name} → #{field2.type_name}"
        }
      end

      # Required → Optional is not breaking, but Optional → Required is
      if !field1.optional? && field2.optional?
        # Not breaking
      elsif field1.optional? && !field2.optional?
        breaking << {
          schema: name,
          type: :required_added,
          field: field_name,
          message: "Field '#{field_name}' changed from optional to required"
        }
      end
    end
  end

  breaking
end

#compute_diff(registry1, registry2) ⇒ Hash (private)

Compute detailed diff between two registries

Returns:

  • (Hash) —

    structured diff results



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# File 'lib/synthra/cli/commands/diff.rb', line 43

def compute_diff(registry1, registry2)
  schemas1 = registry1.schemas
  schemas2 = registry2.schemas
  all_names = (schemas1.keys + schemas2.keys).uniq.sort

  {
    added: schemas2.keys - schemas1.keys,
    removed: schemas1.keys - schemas2.keys,
    modified: compute_modified(schemas1, schemas2, all_names),
    breaking: compute_breaking_changes(schemas1, schemas2, all_names)
  }
end

#compute_modified(schemas1, schemas2, all_names) ⇒ Object (private) 



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# File 'lib/synthra/cli/commands/diff.rb', line 56

def compute_modified(schemas1, schemas2, all_names)
  modified = {}
  
  (schemas1.keys & schemas2.keys).each do |name|
    s1 = schemas1[name]
    s2 = schemas2[name]
    changes = compare_schemas(s1, s2)
    modified[name] = changes if changes.any?
  end

  modified
end

#display_breaking_changes(changes, path1, path2) ⇒ Object (private) 



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# File 'lib/synthra/cli/commands/diff.rb', line 160

def display_breaking_changes(changes, path1, path2)
  breaking = changes[:breaking]

  if breaking.empty?
    success "No breaking changes detected"
    return EXIT_SUCCESS
  end

  puts "=" * 60
  puts "BREAKING CHANGES DETECTED"
  puts "=" * 60
  puts
  puts "Comparing: #{path1} → #{path2}"
  puts

  breaking.each do |change|
    puts "  ✗ #{change[:message]}"
  end

  puts
  error "#{breaking.length} breaking change(s) found"
  EXIT_PARSE_ERROR
end

#display_full_diff(changes, path1, path2) ⇒ Object (private) 



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# File 'lib/synthra/cli/commands/diff.rb', line 184

def display_full_diff(changes, path1, path2)
  puts "=" * 60
  puts "Schema Diff"
  puts "=" * 60
  puts "Comparing: #{path1} → #{path2}"
  puts

  has_diff = false

  # Added schemas
  changes[:added].each do |name|
    puts "➕ #{name} (added)"
    has_diff = true
  end

  # Removed schemas
  changes[:removed].each do |name|
    puts "➖ #{name} (removed)"
    has_diff = true
  end

  # Modified schemas
  changes[:modified].each do |name, diffs|
    puts "📝 #{name} (modified)"
    diffs.each { |d| puts "   #{d}" }
    has_diff = true
  end

  unless has_diff
    success "No differences found"
  end

  # Show breaking changes summary if any
  if changes[:breaking].any?
    puts
    puts "⚠️  Breaking changes: #{changes[:breaking].length}"
  end

  EXIT_SUCCESS
end