Class: Psych::Merge::FileAnalysis

Inherits:
Object
  • Object
show all
Includes:
Ast::Merge::FileAnalyzable
Defined in:
lib/psych/merge/file_analysis.rb

Overview

Analyzes YAML file structure, extracting statements, comments, and freeze blocks.
This is the main analysis class that prepares YAML content for merging.

Examples:

Basic usage

analysis = FileAnalysis.new(yaml_source)
analysis.valid? # => true
analysis.statements # => [NodeWrapper, FreezeNodeBase, ...]
analysis.freeze_blocks # => [FreezeNodeBase, ...]

Constant Summary collapse

DEFAULT_FREEZE_TOKEN =

Default freeze token for identifying freeze blocks

"psych-merge"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, freeze_token: DEFAULT_FREEZE_TOKEN, signature_generator: nil, **options) ⇒ FileAnalysis

Initialize file analysis

Parameters:

  • source (String) —

    YAML source code to analyze

  • freeze_token (String) (defaults to: DEFAULT_FREEZE_TOKEN) —

    Token for freeze block markers

  • signature_generator (Proc, nil) (defaults to: nil) —

    Custom signature generator

  • options (Hash) —

    Additional options (forward compatibility - ignored by FileAnalysis)



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# File 'lib/psych/merge/file_analysis.rb', line 34

def initialize(source, freeze_token: DEFAULT_FREEZE_TOKEN, signature_generator: nil, **options)
  @source = source
  @lines = source.lines.map(&:chomp)
  @freeze_token = freeze_token
  @signature_generator = signature_generator
  @errors = []
  # **options captures any additional parameters (e.g., node_typing) for forward compatibility

  # Initialize comment tracking
  @comment_tracker = CommentTracker.new(source)

  # Parse the YAML
  DebugLogger.time("FileAnalysis#parse_yaml") { parse_yaml }

  # Extract freeze blocks and integrate with nodes
  @freeze_blocks = extract_freeze_blocks
  @statements = integrate_nodes_and_freeze_blocks

  DebugLogger.debug("FileAnalysis initialized", {
    signature_generator: signature_generator ? "custom" : "default",
    statements_count: @statements.size,
    freeze_blocks: @freeze_blocks.size,
    valid: valid?,
  })
end

Instance Attribute Details

#ast ⇒ Psych::Nodes::Stream? (readonly)

Returns Parsed AST.

Returns:

  • (Psych::Nodes::Stream, nil) —

    Parsed AST



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# File 'lib/psych/merge/file_analysis.rb', line 23

def ast
  @ast
end

#comment_tracker ⇒ CommentTracker (readonly)

Returns Comment tracker for this file.

Returns:



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# File 'lib/psych/merge/file_analysis.rb', line 20

def comment_tracker
  @comment_tracker
end

#errors ⇒ Array (readonly)

Returns Parse errors if any.

Returns:

  • (Array) —

    Parse errors if any



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# File 'lib/psych/merge/file_analysis.rb', line 26

def errors
  @errors
end

Instance Method Details

#fallthrough_node?(value) ⇒ Boolean

Override to detect Psych nodes for signature generator fallthrough

Parameters:

  • value (Object) —

    The value to check

Returns:

  • (Boolean) —

    true if this is a fallthrough node



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# File 'lib/psych/merge/file_analysis.rb', line 99

def fallthrough_node?(value)
  value.is_a?(NodeWrapper) || value.is_a?(Ast::Merge::FreezeNodeBase) || value.is_a?(MappingEntry) || super
end

#freeze_block_at(line_num) ⇒ FreezeNode?

Get the freeze block containing the given line.

NOTE: This method intentionally does NOT call super or use the base
freeze_blocks method. The base implementation derives freeze blocks from
statements.select { |n| n.is_a?(Freezable) }, but during initialization
@freeze_blocks is extracted BEFORE @statements is populated (see
integrate_nodes_and_freeze_blocks). This method is called during that
integration process, so we must use @freeze_blocks directly.

Parameters:

  • line_num (Integer) —

    1-based line number

Returns:



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# File 'lib/psych/merge/file_analysis.rb', line 92

def freeze_block_at(line_num)
  @freeze_blocks.find { |fb| fb.location.cover?(line_num) }
end

#in_freeze_block?(line_num) ⇒ Boolean

Check if a line is within a freeze block.

NOTE: This method intentionally does NOT call super or use the base
freeze_blocks method. The base implementation derives freeze blocks from
statements.select { |n| n.is_a?(Freezable) }, but during initialization
@freeze_blocks is extracted BEFORE @statements is populated (see
integrate_nodes_and_freeze_blocks). This method is called during that
integration process, so we must use @freeze_blocks directly.

Parameters:

  • line_num (Integer) —

    1-based line number

Returns:

  • (Boolean) 


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# File 'lib/psych/merge/file_analysis.rb', line 77

def in_freeze_block?(line_num)
  @freeze_blocks.any? { |fb| fb.location.cover?(line_num) }
end

#root_mapping_entries ⇒ Array<Array(NodeWrapper, NodeWrapper)>

Get mapping entries from the root document

Returns:



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# File 'lib/psych/merge/file_analysis.rb', line 105

def root_mapping_entries
  return [] unless valid? && @ast.children&.any?

  doc = @ast.children.first
  return [] unless doc.is_a?(::Psych::Nodes::Document)

  root = doc.children&.first
  return [] unless root.is_a?(::Psych::Nodes::Mapping)

  root_wrapper = NodeWrapper.new(root, lines: @lines)
  root_wrapper.mapping_entries(comment_tracker: @comment_tracker)
end

#root_node ⇒ NodeWrapper?

Get the root node of the first document

Returns:



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# File 'lib/psych/merge/file_analysis.rb', line 120

def root_node
  return unless valid? && @ast.children&.any?

  doc = @ast.children.first
  return unless doc.is_a?(::Psych::Nodes::Document)

  root = doc.children&.first
  return unless root

  NodeWrapper.new(root, lines: @lines)
end

#valid? ⇒ Boolean

Check if parse was successful

Returns:

  • (Boolean) 


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# File 'lib/psych/merge/file_analysis.rb', line 62

def valid?
  @errors.empty? && !@ast.nil?
end