Class: OllamaAgent::Indexing::DiffSummarizer

Inherits:
Object
  • Object
show all
Defined in:
lib/ollama_agent/indexing/diff_summarizer.rb

Overview

Parses and summarizes unified diffs. Provides human-readable change summaries and statistics without needing the full file contents.

Defined Under Namespace

Classes: FileDiff

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.parse(diff) ⇒ Array<FileDiff>

Parse a unified diff string and return structured FileDiff objects.

Parameters:

  • diff (String) —

    unified diff content

Returns:



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# File 'lib/ollama_agent/indexing/diff_summarizer.rb', line 14

def self.parse(diff)
  new.parse(diff)
end

.summarize(diff) ⇒ String

Return a short human-readable summary of a diff.

Parameters:

  • diff (String)

Returns:

  • (String) 


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# File 'lib/ollama_agent/indexing/diff_summarizer.rb', line 21

def self.summarize(diff)
  new.summarize(diff)
end

Instance Method Details

#one_liner(diff) ⇒ Object

Brief one-liner for embedding in prompts.



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# File 'lib/ollama_agent/indexing/diff_summarizer.rb', line 89

def one_liner(diff)
  parsed = parse(diff)
  return "empty diff" if parsed.empty?

  paths   = parsed.map(&:path).first(3).join(", ")
  suffix  = parsed.size > 3 ? " (+#{parsed.size - 3} more)" : ""
  total_a = parsed.sum(&:additions)
  total_d = parsed.sum(&:deletions)

  "#{paths}#{suffix} [+#{total_a}/-#{total_d}]"
end

#parse(diff) ⇒ Object 



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# File 'lib/ollama_agent/indexing/diff_summarizer.rb', line 25

def parse(diff)
  return [] if diff.nil? || diff.strip.empty?

  file_diffs = []
  current    = nil

  diff.each_line do |line|
    line = line.rstrip

    if line.start_with?("diff --git ")
      file_diffs << current if current
      current = new_file_diff(line)

    elsif line.start_with?("new file mode")
      current[:is_new] = true if current

    elsif line.start_with?("deleted file mode")
      current[:is_deleted] = true if current

    elsif line.start_with?("rename to ")
      current[:is_rename] = true if current

    elsif line.start_with?("--- ") || line.start_with?("+++ ")
      next # skip --- +++ headers

    elsif line.start_with?("@@")
      current[:hunks] += 1 if current

    elsif line.start_with?("+") && !line.start_with?("+++")
      current[:additions] += 1 if current

    elsif line.start_with?("-") && !line.start_with?("---")
      current[:deletions] += 1 if current
    end
  end

  file_diffs << current if current
  file_diffs.compact.map { |d| build_entry(d) }
end

#summarize(diff) ⇒ Object

Human-readable multi-line summary.



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# File 'lib/ollama_agent/indexing/diff_summarizer.rb', line 66

def summarize(diff)
  parsed = parse(diff)
  return "Empty diff" if parsed.empty?

  total_add = parsed.sum(&:additions)
  total_del = parsed.sum(&:deletions)
  header    = "#{parsed.size} file(s) changed: +#{total_add} -#{total_del}"

  lines = [header]
  parsed.each do |fd|
    tag = if fd.is_new then "[new]"
          elsif fd.is_deleted then "[deleted]"
          elsif fd.is_rename  then "[renamed]"
          else                     ""
          end

    lines << "  #{fd.path} #{tag} +#{fd.additions} -#{fd.deletions}"
  end

  lines.join("\n")
end