Class: Ro::Migrator

Inherits:
Object show all
Defined in:
lib/ro/migrator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root_path, options = {}) ⇒ Migrator

Returns a new instance of Migrator.



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# File 'lib/ro/migrator.rb', line 5

def initialize(root_path, options = {})
  @root_path = Path.for(root_path)
  @options = {
    dry_run: false,
    backup: false,
    verbose: false,
    force: false
  }.merge(options)
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/ro/migrator.rb', line 3

def options
  @options
end

#root_path ⇒ Object (readonly)

Returns the value of attribute root_path.



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# File 'lib/ro/migrator.rb', line 3

def root_path
  @root_path
end

Instance Method Details

#backup ⇒ Object

Create backup



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# File 'lib/ro/migrator.rb', line 241

def backup
  timestamp = Time.now.strftime('%Y%m%d%H%M%S')
  backup_name = "#{@root_path.basename}.backup.#{timestamp}"
  backup_path = @root_path.parent.join(backup_name)

  log "Creating backup: #{backup_path}"

  unless dry_run?
    FileUtils.cp_r(@root_path.to_s, backup_path.to_s)
  end

  backup_path
end

#backup? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ro/migrator.rb', line 19

def backup?
  @options[:backup]
end

#dry_run? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ro/migrator.rb', line 15

def dry_run?
  @options[:dry_run]
end

#force? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ro/migrator.rb', line 27

def force?
  @options[:force]
end

#migrate ⇒ Object

Migrate entire root



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# File 'lib/ro/migrator.rb', line 204

def migrate
  log "Starting full migration of #{@root_path}"

  if backup?
    backup_path = backup
    log "Created backup at #{backup_path}"
  end

  validation = validate

  if validation[:old_nodes].empty?
    log "No old structure nodes found to migrate"
    return { success: true, nodes_migrated: 0, collections_migrated: 0 }
  end

  collections = validation[:old_nodes].map { |n| n[:collection] }.uniq
  total_migrated = 0
  collections_migrated = 0

  collections.each do |collection_name|
    result = migrate_collection(collection_name)
    if result[:success]
      collections_migrated += 1
      total_migrated += result[:migrated_count]
    end
  end

  log "Migration complete! Migrated #{total_migrated} nodes across #{collections_migrated} collections"

  {
    success: true,
    nodes_migrated: total_migrated,
    collections_migrated: collections_migrated
  }
end

#migrate_collection(collection_name) ⇒ Object

Migrate an entire collection



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# File 'lib/ro/migrator.rb', line 178

def migrate_collection(collection_name)
  log "Migrating collection: #{collection_name}"

  validation = validate
  collection_nodes = validation[:old_nodes].select { |n| n[:collection] == collection_name }

  migrated_count = 0
  errors = []

  collection_nodes.each do |old_node|
    result = migrate_node(collection_name, old_node[:node_id])
    if result[:success]
      migrated_count += 1
    else
      errors << result[:error]
    end
  end

  {
    success: errors.empty?,
    migrated_count: migrated_count,
    errors: errors
  }
end

#migrate_node(collection_name, node_id) ⇒ Object

Migrate a single node



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# File 'lib/ro/migrator.rb', line 136

def migrate_node(collection_name, node_id)
  log "Migrating #{collection_name}/#{node_id}..."

  collection_path = @root_path.join(collection_name)
  old_node_path = collection_path.join(node_id)

  unless old_node_path.directory?
    return { success: false, error: "Node directory not found: #{old_node_path}" }
  end

  new_metadata_file = collection_path.join("#{node_id}.yml")

  # Look for attributes file in any format
  old_attributes_file = nil
  %w[yml yaml json toml].each do |ext|
    candidate = old_node_path.join("attributes.#{ext}")
    if candidate.exist?
      old_attributes_file = candidate
      break
    end
  end

  unless dry_run?
    if old_attributes_file
      # Move existing attributes file to collection level
      log "  Moving #{old_attributes_file} → #{new_metadata_file}"
      FileUtils.mv(old_attributes_file.to_s, new_metadata_file.to_s)
    else
      # Create empty metadata file for nodes without attributes
      log "  Creating empty metadata #{new_metadata_file} (node had no attributes)"
      File.write(new_metadata_file.to_s, {}.to_yaml)
    end
  end

  # Assets stay in assets/ subdirectory - no moving needed
  # Old: collection/identifier/assets/foo.png
  # New: collection/identifier/assets/foo.png (same location)

  { success: true, node_id: node_id, had_attributes: !old_attributes_file.nil? }
end

#preview ⇒ Object

Preview migration without making changes



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# File 'lib/ro/migrator.rb', line 98

def preview
  validation = validate
  plan = []

  validation[:old_nodes].each do |old_node|
    collection_name = old_node[:collection]
    node_id = old_node[:node_id]
    old_path = old_node[:old_path]
    has_attributes = old_node[:has_attributes]
    attributes_file = old_node[:attributes_file]

    collection_path = @root_path.join(collection_name)
    new_metadata_file = collection_path.join("#{node_id}.yml")
    new_asset_dir = collection_path.join(node_id)

    actions = []
    if has_attributes
      actions << "Move #{attributes_file} → #{new_metadata_file}"
    else
      actions << "Create empty #{new_metadata_file} (node has no attributes)"
    end
    actions << "Assets remain in #{old_path}/assets/ (no change needed)"

    plan << {
      node_id: node_id,
      collection: collection_name,
      old_path: old_path,
      new_metadata_file: new_metadata_file,
      new_asset_dir: new_asset_dir,
      has_attributes: has_attributes,
      actions: actions
    }
  end

  plan
end

#rollback ⇒ Object

Rollback from backup



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# File 'lib/ro/migrator.rb', line 256

def rollback
  # Find most recent backup
  backup_pattern = "#{@root_path.basename}.backup.*"
  backups = @root_path.parent.glob(backup_pattern).sort.reverse

  if backups.empty?
    return { success: false, error: "No backups found" }
  end

  backup_path = backups.first
  log "Rolling back from #{backup_path}"

  unless dry_run?
    # Remove current root
    FileUtils.rm_rf(@root_path.to_s)
    # Restore from backup
    FileUtils.cp_r(backup_path.to_s, @root_path.to_s)
  end

  {
    success: true,
    restored_from: backup_path
  }
end

#validate ⇒ Object

Validate the structure and return analysis



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# File 'lib/ro/migrator.rb', line 32

def validate
  result = {
    has_old_structure: false,
    has_new_structure: false,
    old_nodes: [],
    new_nodes: [],
    collections: []
  }

  root = Root.for(@root_path)

  root.collections.each do |collection|
    collection_name = collection.name
    result[:collections] << collection_name

    # Check for new structure (metadata files at collection level)
    collection.metadata_files.each do |entry|
      # Only count new-structure nodes for migration purposes
      next unless entry[:type] == :new

      result[:new_nodes] << {
        collection: collection_name,
        node_id: entry[:id],
        metadata_file: entry[:path]
      }
      result[:has_new_structure] = true
    end

    # Check for old structure (ALL subdirectories, with or without attributes)
    # We need to migrate ALL nodes, even those without attributes.yml
    collection.subdirectories.each do |subdir|
      node_id = subdir.basename.to_s

      # Skip if this node already has new-structure metadata
      already_migrated = result[:new_nodes].any? { |n|
        n[:collection] == collection_name && n[:node_id] == node_id
      }
      next if already_migrated

      # Check if there's an attributes file (any format)
      attributes_file = nil
      has_attributes = false
      %w[yml yaml json toml].each do |ext|
        candidate = subdir.join("attributes.#{ext}")
        if candidate.exist?
          attributes_file = candidate
          has_attributes = true
          break
        end
      end

      result[:old_nodes] << {
        collection: collection_name,
        node_id: node_id,
        old_path: subdir,
        attributes_file: attributes_file,
        has_attributes: has_attributes
      }
      result[:has_old_structure] = true
    end
  end

  result
end

#verbose? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ro/migrator.rb', line 23

def verbose?
  @options[:verbose]
end