Class: Mbeditor::RubyDefinitionService

Inherits:
Object
  • Object
show all
Defined in:
app/services/mbeditor/ruby_definition_service.rb

Overview

Searches .rb files in a workspace for definitions of a named Ruby method using Ripper’s AST parser (no subprocesses).

Returns an array of hashes, each describing one definition site:

{
  file:      String,  # workspace-relative path
  line:      Integer, # 1-based line number of the `def` keyword
  signature: String,  # trimmed source text of the def line
  comments:  String   # leading # comment lines immediately above the def (may be empty)
}

Usage:

results = RubyDefinitionService.call(workspace_root, "my_method",
                                     excluded_paths: %w[tmp .git])

Additional class methods for IntelliSense features:

RubyDefinitionService.defs_in_file(abs_path)
  → { "method_name" => [{ line: Integer, signature: String }, ...] }
RubyDefinitionService.module_defined_in(workspace_root, "ModuleName", ...)
  → abs_path String or nil
RubyDefinitionService.includes_in_file(abs_path)
  → ["ModuleName", ...]  (include/extend/prepend calls)

Constant Summary collapse

MAX_RESULTS = 
20
MAX_COMMENT_LOOKAHEAD = 
15
MAX_FILES_SCANNED = 
10_000

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(workspace_root, symbol, excluded_paths: [], included_dirs: []) ⇒ RubyDefinitionService

Returns a new instance of RubyDefinitionService.



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 168

def initialize(workspace_root, symbol, excluded_paths: [], included_dirs: [])
  @workspace_root    = workspace_root.to_s.chomp("/")
  @symbol            = symbol
  @excluded_paths    = Array(excluded_paths)
  @included_dirs     = Array(included_dirs)
  @exclusion_matcher = ExclusionMatcher.new(@excluded_paths)
end

Class Attribute Details

.cache_path ⇒ Object

Returns the value of attribute cache_path.



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 52

def cache_path
  @cache_path
end

.file_cache ⇒ Object (readonly)

Returns the value of attribute file_cache.



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 51

def file_cache
  @file_cache
end

.mutex ⇒ Object (readonly)

Returns the value of attribute mutex.



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 51

def mutex
  @mutex
end

Class Method Details

.call(workspace_root, symbol, excluded_paths: [], included_dirs: []) ⇒ Object 



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 54

def call(workspace_root, symbol, excluded_paths: [], included_dirs: [])
  new(workspace_root, symbol,
      excluded_paths: excluded_paths,
      included_dirs:  included_dirs).call
end

.clear_cache! ⇒ Object

Exposed for tests.



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 101

def clear_cache!
  @mutex.synchronize { @file_cache.clear; @cache_loaded = false }
  path = @cache_path.to_s
  File.delete(path) if !path.empty? && File.exist?(path)
rescue StandardError
  nil
end

.defs_in_file(file_path) ⇒ Object

Returns all method defs in a single file from the cache (no workspace walk). The file must already be cached; returns {} if not found. Result: { “method_name” => [{ line: Integer, signature: String }, …] }



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 112

def defs_in_file(file_path)
  load_disk_cache_once
  entry = @mutex.synchronize { @file_cache[file_path.to_s] }
  return {} unless entry

  entry[:all_defs].transform_values do |lines_arr|
    lines_arr.map { |line| { line: line, signature: (entry[:lines][line - 1] || "").strip } }
  end
end

.includes_in_file(file_path) ⇒ Object

Returns the list of module/class names passed to include/extend/prepend in the given file, from the cache. The file must already be cached; returns [] if not found.



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 151

def includes_in_file(file_path)
  load_disk_cache_once
  entry = @mutex.synchronize { @file_cache[file_path.to_s] }
  return [] unless entry

  entry[:include_calls] || []
end

.load_disk_cache_once ⇒ Object

Load the JSON cache from disk exactly once per process (double-checked under the mutex so concurrent first-calls don’t double-load).



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 62

def load_disk_cache_once
  return if @cache_loaded

  @mutex.synchronize do
    return if @cache_loaded

    @cache_loaded = true
    path = @cache_path.to_s
    return if path.empty? || !File.exist?(path)

    raw = JSON.parse(File.read(path))
    raw.each do |abs_path, entry|
      @file_cache[abs_path] = {
        mtime:         entry["mtime"].to_f,
        lines:         entry["lines"],
        all_defs:      entry["all_defs"],
        module_names:  entry["module_names"],   # nil for old-format entries → triggers re-parse
        include_calls: entry["include_calls"]   # nil for old-format entries → triggers re-parse
      }
    end
  rescue StandardError
    nil # corrupted or incompatible cache file — start fresh
  end
end

.module_defined_in(workspace_root, module_name, excluded_paths: [], included_dirs: []) ⇒ Object

Searches the cache (and triggers a workspace scan if needed) to find which file in workspace_root defines the given module or class name. Returns the absolute file path string or nil.



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 125

def module_defined_in(workspace_root, module_name, excluded_paths: [], included_dirs: [])
  load_disk_cache_once
  root_prefix = workspace_root.to_s.chomp("/")
  within_dirs = ->(path) {
    return true if included_dirs.empty?
    included_dirs.any? { |d| path.start_with?(File.join(root_prefix, d) + "/") }
  }
  result = @mutex.synchronize do
    @file_cache.find { |path, entry| within_dirs.call(path) && entry[:module_names]&.include?(module_name) }
  end
  return result[0] if result

  # Cache miss: scan workspace to populate cache entries with module_names.
  new(workspace_root, nil,
      excluded_paths: excluded_paths,
      included_dirs:  included_dirs).scan_workspace

  result = @mutex.synchronize do
    @file_cache.find { |path, entry| within_dirs.call(path) && entry[:module_names]&.include?(module_name) }
  end
  result ? result[0] : nil
end

.persist_cache ⇒ Object

Atomically write the in-memory cache to disk (tmp-file + rename).



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 88

def persist_cache
  path = @cache_path.to_s
  return if path.empty?

  snapshot = @mutex.synchronize { @file_cache.dup }
  tmp_path = "#{path}.tmp"
  File.write(tmp_path, JSON.generate(snapshot))
  File.rename(tmp_path, path)
rescue StandardError
  nil
end

.scan(workspace_root, excluded_paths: [], included_dirs: []) ⇒ Object

Convenience wrapper: scan the whole workspace to warm the cache. Fast on subsequent calls (only re-parses files whose mtime changed).



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 161

def scan(workspace_root, excluded_paths: [], included_dirs: [])
  new(workspace_root, nil,
      excluded_paths: excluded_paths,
      included_dirs:  included_dirs).scan_workspace
end

Instance Method Details

#call ⇒ Object 



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 212

def call
  self.class.load_disk_cache_once

  results       = []
  @new_entries  = false
  files_scanned = 0

  evict_deleted_cache_entries

  search_roots.each do |root|
    Find.find(root) do |path|
      if File.directory?(path)
        Find.prune if path != root && @exclusion_matcher.excluded?(relative_path(path))
        next
      end

      next unless path.end_with?(".rb")

      rel = relative_path(path)
      next if @exclusion_matcher.excluded?(rel)

      files_scanned += 1
      if files_scanned > MAX_FILES_SCANNED
        Rails.logger.warn("[mbeditor] RubyDefinitionService: workspace exceeds #{MAX_FILES_SCANNED} .rb files; stopping scan early")
        break
      end

      begin
        cached = cache_entry_for(path)
        next unless cached

        hit_lines = @symbol ? cached[:all_defs].fetch(@symbol, nil) : nil
        next unless hit_lines && hit_lines.any?

        hit_lines.each do |def_line|
          results << {
            file:      rel,
            line:      def_line,
            signature: (cached[:lines][def_line - 1] || "").strip,
            comments:  extract_comments(cached[:lines], def_line)
          }
          return results if results.length >= MAX_RESULTS
        end
      rescue StandardError
        # Malformed file or unreadable; skip silently
      end
    end
  end

  self.class.persist_cache if @new_entries
  results
end

#scan_workspace ⇒ Object

Walks the entire workspace and populates the per-file cache (including the new module_names and include_calls fields) without filtering by symbol. Used by module_defined_in to ensure the cache is warm.



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# File 'app/services/mbeditor/ruby_definition_service.rb', line 179

def scan_workspace
  self.class.load_disk_cache_once
  @new_entries  = false
  files_scanned = 0
  evict_deleted_cache_entries

  search_roots.each do |root|
    Find.find(root) do |path|
      if File.directory?(path)
        Find.prune if path != root && @exclusion_matcher.excluded?(relative_path(path))
        next
      end
      next unless path.end_with?(".rb")

      rel = relative_path(path)
      next if @exclusion_matcher.excluded?(rel)

      files_scanned += 1
      if files_scanned > MAX_FILES_SCANNED
        Rails.logger.warn("[mbeditor] RubyDefinitionService: workspace exceeds #{MAX_FILES_SCANNED} .rb files; stopping scan early")
        break
      end
      begin
        cache_entry_for(path)
      rescue StandardError
        nil
      end
    end
  end

  self.class.persist_cache if @new_entries
end