Class: Ace::Docs::Molecules::ChangeDetector

Inherits:
Object
  • Object
show all
Defined in:
lib/ace/docs/molecules/change_detector.rb

Overview

Analyzes git history and file changes for documents Delegates diff operations to ace-git for consistency

Class Method Summary collapse

Class Method Details

.default_since_date ⇒ Object 



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# File 'lib/ace/docs/molecules/change_detector.rb', line 237

def self.default_since_date
  (Date.today - 7).strftime("%Y-%m-%d")
end

.detect_renames(since: nil) ⇒ Array<Hash>

Check if files have been renamed or moved

Parameters:

  • since (String) (defaults to: nil) —

    Date or commit to check from

Returns:

  • (Array<Hash>) —

    List of renamed/moved files



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# File 'lib/ace/docs/molecules/change_detector.rb', line 178

def self.detect_renames(since: nil)
  since_param = since || default_since_date
  since_ref = resolve_since_to_commit(since_param)
  cmd = "git diff --name-status --diff-filter=R #{since_ref}..HEAD"

  stdout = execute_git_command(cmd)
  return [] if stdout.strip.empty?

  renames = []
  stdout.each_line do |line|
    if line.start_with?("R")
      parts = line.strip.split(/\s+/, 3)
      if parts.length >= 3
        old_path, new_path = parts[1], parts[2]
        renames << {old: old_path, new: new_path}
      end
    end
  end

  renames
end

.determine_since(document, since) ⇒ Object 



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# File 'lib/ace/docs/molecules/change_detector.rb', line 211

def self.determine_since(document, since)
  # If explicit since provided, use it
  return format_since(since) if since

  # Use document's last updated date if available
  if document.last_updated
    return document.last_updated.strftime("%Y-%m-%d")
  end

  # Default to 7 days ago
  default_since_date
end

.empty_diff_result ⇒ Object 



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# File 'lib/ace/docs/molecules/change_detector.rb', line 202

def self.empty_diff_result
  {
    document_path: nil,
    diff: "",
    has_changes: false,
    timestamp: Time.now.iso8601
  }
end

.execute_git_command(cmd) ⇒ String

Execute git command (protected for testing)

Parameters:

  • cmd (String, Array) —

    Git command to execute

Returns:

  • (String) —

    Command output or empty string on failure



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# File 'lib/ace/docs/molecules/change_detector.rb', line 378

def self.execute_git_command(cmd)
  if cmd.is_a?(Array)
    stdout, _stderr, status = Open3.capture3(*cmd, chdir: git_root)
  else
    stdout, _stderr, status = Open3.capture3(cmd, chdir: git_root)
  end
  status.success? ? stdout : ""
end

.format_diff_for_saving(diff_result) ⇒ Object 



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# File 'lib/ace/docs/molecules/change_detector.rb', line 323

def self.format_diff_for_saving(diff_result)
  content = []
  content << "# Diff Analysis Report"
  content << "Generated: #{diff_result[:timestamp]}"
  content << "Since: #{diff_result[:since]}"
  content << ""

  if diff_result[:document_diffs]
    # Multiple documents
    content << "## Summary"
    content << "- Total documents analyzed: #{diff_result[:total_documents]}"
    content << "- Documents with changes: #{diff_result[:documents_with_changes]}"
    content << ""

    diff_result[:document_diffs].each do |doc_diff|
      doc = doc_diff[:document]
      content << "## #{doc.display_name}"
      content << "- Type: #{doc.doc_type}"
      content << "- Purpose: #{doc.purpose}"
      content << "- Has changes: #{doc_diff[:has_changes] ? "Yes" : "No"}"
      content << ""

      if doc_diff[:has_changes]
        content << "### Relevant Changes"
        content << "```diff"
        content << doc_diff[:diff]
        content << "```"
      else
        content << "No relevant changes detected."
      end
      content << ""
    end
  else
    # Single document
    content << "## Document: #{diff_result[:document_path]}"
    content << "- Type: #{diff_result[:document_type]}"
    content << "- Has changes: #{diff_result[:has_changes] ? "Yes" : "No"}"
    content << ""

    if diff_result[:has_changes]
      content << "### Git Diff"
      content << "```diff"
      content << diff_result[:diff]
      content << "```"
    else
      content << "No changes detected."
    end
  end

  content.join("\n")
end

.format_since(since) ⇒ Object 



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# File 'lib/ace/docs/molecules/change_detector.rb', line 224

def self.format_since(since)
  case since
  when Date
    since.strftime("%Y-%m-%d")
  when Time
    since.strftime("%Y-%m-%d")
  when String
    since
  else
    default_since_date
  end
end

.generate_batch_diff(documents, since, options = {}) ⇒ String

Generate batch diff for analysis

Parameters:

  • documents (Array<Document>) —

    Documents to analyze

  • since (String) —

    Time range for diff

  • options (Hash) (defaults to: {}) —

    Options for diff generation

Returns:

  • (String) —

    Raw git diff



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# File 'lib/ace/docs/molecules/change_detector.rb', line 135

def self.generate_batch_diff(documents, since, options = {})
  # Generate the full codebase diff for the time period
  generate_git_diff(since, options)
end

.generate_git_diff(since, options = {}) ⇒ Object 



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# File 'lib/ace/docs/molecules/change_detector.rb', line 241

def self.generate_git_diff(since, options = {})
  # Warn about deprecated option keys (migrated from ace-git-diff to ace-git)
  warn_deprecated_options(options)

  # Delegate to ace-git for consistent filtering and configuration
  diff_options = build_diff_options(since, options)

  result = Ace::Git::Organisms::DiffOrchestrator.generate(diff_options)
  result.content
rescue => e
  warn "ace-git failed: #{e.message}" if ENV["DEBUG"]
  ""
end

.get_diff_for_document(document, since: nil, options: {}) ⇒ Hash

Get git diff for a document since a specific date or commit

Parameters:

  • document (Document) —

    The document to analyze

  • since (String, Date) (defaults to: nil) —

    Date or commit to diff from

  • options (Hash) (defaults to: {}) —

    Options for diff generation

Returns:

  • (Hash) —

    Diff result with content and metadata For single subject: returns hash with :diff key containing single diff For multi-subject: returns hash with :diffs key containing => content



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# File 'lib/ace/docs/molecules/change_detector.rb', line 24

def self.get_diff_for_document(document, since: nil, options: {})
  return empty_diff_result unless document.path

  # Determine the since parameter
  since_param = determine_since(document, since)

  # Check if document has multi-subject configuration
  if document.multi_subject?
    # Generate separate diffs for each subject
    diffs_hash = get_diffs_for_subjects(document, since_param, options)

    {
      document_path: document.path,
      document_type: document.doc_type,
      since: since_param,
      diffs: diffs_hash,
      multi_subject: true,
      has_changes: diffs_hash.values.any? { |diff| !diff.strip.empty? },
      timestamp: Time.now.iso8601,
      options: options
    }
  else
    # Single subject - backward compatible behavior
    filters = document.subject_diff_filters
    if filters && !filters.empty?
      options = options.merge(paths: filters)
    end

    diff_content = generate_git_diff(since_param, options)

    {
      document_path: document.path,
      document_type: document.doc_type,
      since: since_param,
      diff: diff_content,
      multi_subject: false,
      has_changes: !diff_content.strip.empty?,
      timestamp: Time.now.iso8601,
      options: options
    }
  end
end

.get_diff_for_documents(documents, since: nil, options: {}) ⇒ Hash

Get combined diff for multiple documents

Parameters:

  • documents (Array<Document>) —

    Documents to analyze

  • since (String, Date) (defaults to: nil) —

    Date or commit to diff from

  • options (Hash) (defaults to: {}) —

    Options for diff generation

Returns:

  • (Hash) —

    Combined diff results



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# File 'lib/ace/docs/molecules/change_detector.rb', line 98

def self.get_diff_for_documents(documents, since: nil, options: {})
  # Get document-specific diffs with subject filtering
  since_param = since || default_since_date

  document_diffs = documents.map do |doc|
    # Extract subject diff filters for this document
    doc_options = options.dup
    filters = doc.subject_diff_filters
    if filters && !filters.empty?
      doc_options = doc_options.merge(paths: filters)
    end

    # Get filtered diff for this document
    diff_content = generate_git_diff(since_param, doc_options)

    {
      document: doc,
      diff: diff_content,
      has_changes: !diff_content.strip.empty?
    }
  end

  {
    total_documents: documents.size,
    documents_with_changes: document_diffs.count { |d| d[:has_changes] },
    since: since_param,
    timestamp: Time.now.iso8601,
    options: options,
    document_diffs: document_diffs
  }
end

.get_diffs_for_subjects(document, since, options = {}) ⇒ Hash

Generate diffs for multiple subjects

Parameters:

  • document (Document) —

    The document with multi-subject configuration

  • since (String) —

    Date or commit to diff from

  • options (Hash) (defaults to: {}) —

    Base options for diff generation

Returns:

  • (Hash) —

    Hash mapping subject names to diff content => diff_string



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# File 'lib/ace/docs/molecules/change_detector.rb', line 72

def self.get_diffs_for_subjects(document, since, options = {})
  subject_configs = document.subject_configurations

  result = {}
  subject_configs.each do |subject|
    name = subject[:name]
    filters = subject[:filters]

    # Build options for this subject
    subject_options = options.merge(paths: filters)

    # Generate diff for this subject
    diff_content = generate_git_diff(since, subject_options)

    # Store diff (even if empty - caller can decide whether to keep)
    result[name] = diff_content
  end

  result
end

.git_root ⇒ Object 



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# File 'lib/ace/docs/molecules/change_detector.rb', line 315

def self.git_root
  @git_root ||= begin
    stdout, _, status = Open3.capture3("git rev-parse --show-toplevel")
    # Use ProjectRootFinder as fallback to support both main repos and git worktrees
    status.success? ? stdout.strip : Ace::Support::Fs::Molecules::ProjectRootFinder.find_or_current
  end
end

.resolve_since_to_commit(since) ⇒ Object 



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# File 'lib/ace/docs/molecules/change_detector.rb', line 288

def self.resolve_since_to_commit(since)
  # If it looks like a commit SHA, use as-is
  return since if /^[0-9a-f]{7,40}$/i.match?(since)

  # It's a date - find the first commit since that date
  cmd = "git log --since=\"#{since}\" --format=%H --reverse --all"
  stdout = execute_git_command(cmd)

  if !stdout.strip.empty?
    first_commit = stdout.strip.split("\n").first

    # Get parent of first commit to include all changes since date
    parent_cmd = "git rev-parse #{first_commit}~1 2>/dev/null"
    parent_stdout = execute_git_command(parent_cmd)

    if !parent_stdout.strip.empty?
      return parent_stdout.strip
    else
      # First commit has no parent (initial commit), use it directly
      return first_commit
    end
  end

  # Fallback: use date string and let git handle it
  since
end

.save_diff_to_cache(diff_result) ⇒ String

Save diff analysis to cache folder with session structure

Parameters:

  • diff_result (Hash) —

    Diff analysis result

Returns:

  • (String) —

    Path to saved analysis file



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# File 'lib/ace/docs/molecules/change_detector.rb', line 143

def self.save_diff_to_cache(diff_result)
  cache_dir = ".ace-local/docs"
  compact_id = Ace::B36ts.encode(Time.now)
  session_dir = File.join(cache_dir, "diff-#{compact_id}")

  FileUtils.mkdir_p(session_dir)

  # Save raw git diff
  if diff_result[:diff] && !diff_result[:diff].empty?
    raw_diff_path = File.join(session_dir, "repo-diff.diff")
    File.write(raw_diff_path, diff_result[:diff])
  end

  # Save formatted analysis report
  analysis_path = File.join(session_dir, "analysis.md")
  content = format_diff_for_saving(diff_result)
  File.write(analysis_path, content)

  # Save metadata
  metadata_path = File.join(session_dir, "metadata.yml")
  metadata = {
    "generated" => diff_result[:timestamp],
    "since" => diff_result[:since],
    "document_count" => diff_result[:total_documents] || 1,
    "has_changes" => diff_result[:has_changes] || (diff_result[:documents_with_changes] || 0) > 0,
    "options" => diff_result[:options] || {}
  }
  File.write(metadata_path, metadata.to_yaml)

  analysis_path
end