Module: AIGit::Default

Defined in:
lib/ai_git/default.rb

Class Method Summary collapse

Class Method Details

.call ⇒ Object 



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# File 'lib/ai_git/default.rb', line 120

def call
  model_name = ENV["AI_GIT_MODEL_NAME"] || "phi4:14b"

  staged = AIGit::Git.staged_files
  abort "Error: No staged files. Use `git add` first." if staged.to_s.strip.empty?

  diff = AIGit::Git.diff
  branch = AIGit::Git.current_branch

  puts "\e[1mModel Name:\e[0m #{model_name}"
  puts "\e[1mStaged Files:\e[0m #{staged}"
  puts "\e[1mBranch:\e[0m #{branch}"
  puts "\e[1mAI Generating Commit Message\e[0m"

  result = Benchmark.measure do
    message = generate_commit_message(diff, model_name)
    message = message.gsub(/\n{2,}/, "\n")

    puts "\e[1mCommit Message:\e[0m\n\n#{message}\n"

    escaped_msg = message.gsub(/[\\"`$]/) { |c| "\\#{c}" }
    AIGit::Git.run_command("git", "commit -m \"#{escaped_msg}\"")
    puts "\e[1mGit Commited\e[0m"

    AIGit::Git.run_command("git", "push")
    puts "\e[1mGit Pushed\e[0m"
  end

  puts "\e[1mBenchmark\e[0m"
  puts result
end

.escape_json(string) ⇒ Object 



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# File 'lib/ai_git/default.rb', line 14

def escape_json(string)
  string.gsub("\\", "\\\\")
        .gsub('"', '\"')
        .gsub("\n", '\\n')
        .gsub("\r", '\\r')
        .gsub("\t", '\\t')
end

.generate_commit_message(diff, model_name) ⇒ Object 



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# File 'lib/ai_git/default.rb', line 22

def generate_commit_message(diff, model_name)
  raise "No staged changes to generate commit message for" if diff.to_s.strip.empty?

  prompt = <<~PROMPT
    You are an expert Git commit message writer. Output ONLY the commit message — no explanations, no markdown, no backticks, no preamble.

    Here are the changes:
    #{diff}

    STRICT OUTPUT FORMAT (follow exactly):

    <short imperative title, max 72 chars>

    <blank line>

    ## Summary
    <2–4 bullet points covering the most important changes. Each bullet starts with a verb.>

    ## Why
    <1–3 sentences explaining the motivation or context behind the change. Omit if the reason is obvious.>

    RULES:
    - Title line: short, specific, imperative mood (e.g. "Add JWT login with refresh token support"). Avoid vague titles like "Update stuff" or "Fix bug".
    - Summary bullets: describe WHAT changed, not HOW the code looks. Focus on behaviour and impact.
    - Why section: explain the problem being solved or the goal being achieved. Skip if it adds no value.
    - No filler phrases ("this commit", "this PR", "as per discussion").
    - No line should exceed 72 characters.

    EXAMPLES OF GOOD OUTPUT:

    Add JWT-based login with refresh token support

    ## Summary
    - Implement login endpoint with access and refresh token issuance
    - Add token refresh route with rotation and expiry validation
    - Protect private routes via middleware that verifies access tokens
    - Store refresh tokens using encrypted HTTP-only cookies

    ## Why
    Users were being logged out on every page reload. Refresh tokens allow
    sessions to persist securely without requiring re-authentication.

    ---

    Prevent nil crash when user preferences are missing

    ## Summary
    - Add nil guard in ReportGenerator#process before accessing preferences
    - Fall back to system defaults when preferences object is absent

    ## Why
    Reports were raising NoMethodError in production for users created
    before the preferences feature shipped.

    ---

    Now generate the commit message:
  PROMPT

  json_body = {
    model: model_name,
    prompt: prompt,
    stream: false,
    temperature: 0.3,
    top_p: 0.9,
    stop: ["\n\n\n", "```", "Here is", "The commit message"],
    num_predict: 400
  }.to_json

  uri = URI("http://localhost:11434/api/generate")
  request = Net::HTTP::Post.new(uri)
  request["Content-Type"] = "application/json"
  request.body = json_body

  response = Net::HTTP.start(uri.host, uri.port, read_timeout: 120) do |http|
    http.request(request)
  end

  raise "Failed to connect to Ollama. Is it running?" unless response.is_a?(Net::HTTPSuccess)

  data = JSON.parse(response.body)
  message = data["response"].to_s.strip

  message = message.gsub(/^(Here is|The commit message is|```|json|markdown)/i, "")
                   .gsub(/^>\s*/, "")
                   .gsub(/\\n/, "\n")
                   .strip

  lines = message.lines.map(&:strip)
  lines.reject! { |line| line.match?(/^(Here|Output|Generated|Based on|The changes)/i) }

  message = lines.join("\n").strip

  message = "chore: update code" if message.lines.count < 1 || message.strip.empty?

  message
end