Module: ToolUtils

Defined in:
lib/llm_gateway/agents/tools/tool_utils.rb

Constant Summary collapse

DEFAULT_MAX_LINES = 
2000
DEFAULT_MAX_BYTES = 
50 * 1024

Class Method Summary collapse

Class Method Details

.expand_path(file_path) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 25

def expand_path(file_path)
  normalized = file_path.to_s.sub(/^@/, "").gsub(/[\u00A0\u2000-\u200A\u202F\u205F\u3000]/, " ")
  return Dir.home if normalized == "~"
  return File.join(Dir.home, normalized[2..]) if normalized.start_with?("~/")

  normalized
end

.format_size(bytes) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 18

def format_size(bytes)
  return "#{bytes}B" if bytes < 1024
  return format("%.1fKB", bytes / 1024.0) if bytes < 1024 * 1024

  format("%.1fMB", bytes / (1024.0 * 1024.0))
end

.resolve_read_path(file_path, cwd = Dir.pwd) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 38

def resolve_read_path(file_path, cwd = Dir.pwd)
  resolved = resolve_to_cwd(file_path, cwd)
  return resolved if File.exist?(resolved)

  am_pm_variant = resolved.gsub(/ (AM|PM)\./i) { "\u202F#{Regexp.last_match(1)}." }
  return am_pm_variant if File.exist?(am_pm_variant)

  nfd_variant = resolved.unicode_normalize(:nfd)
  return nfd_variant if File.exist?(nfd_variant)

  curly_variant = resolved.tr("'", "\u2019")
  return curly_variant if File.exist?(curly_variant)

  nfd_curly_variant = nfd_variant.tr("'", "\u2019")
  return nfd_curly_variant if File.exist?(nfd_curly_variant)

  resolved
end

.resolve_to_cwd(file_path, cwd = Dir.pwd) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 33

def resolve_to_cwd(file_path, cwd = Dir.pwd)
  expanded = expand_path(file_path)
  Pathname.new(expanded).absolute? ? expanded : File.expand_path(expanded, cwd)
end

.split_lines_for_counting(content) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 130

def split_lines_for_counting(content)
  return [] if content.empty?

  lines = content.split("\n", -1)
  lines.pop if content.end_with?("\n")
  lines
end

.truncate_head(content, max_lines: DEFAULT_MAX_LINES, max_bytes: DEFAULT_MAX_BYTES) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 57

def truncate_head(content, max_lines: DEFAULT_MAX_LINES, max_bytes: DEFAULT_MAX_BYTES)
  lines = split_lines_for_counting(content)
  total_lines = lines.length
  total_bytes = content.bytesize

  if total_lines <= max_lines && total_bytes <= max_bytes
    return truncation_result(content, false, nil, total_lines, total_bytes, total_lines, total_bytes, false, false, max_lines, max_bytes)
  end

  first_line_bytes = lines.first.to_s.bytesize
  if first_line_bytes > max_bytes
    return truncation_result("", true, "bytes", total_lines, total_bytes, 0, 0, false, true, max_lines, max_bytes)
  end

  out_lines = []
  out_bytes = 0
  truncated_by = "lines"

  lines.each_with_index do |line, index|
    break if index >= max_lines

    line_bytes = line.bytesize + (index.positive? ? 1 : 0)
    if out_bytes + line_bytes > max_bytes
      truncated_by = "bytes"
      break
    end

    out_lines << line
    out_bytes += line_bytes
  end

  output = out_lines.join("\n")
  truncation_result(output, true, truncated_by, total_lines, total_bytes, out_lines.length, output.bytesize, false, false, max_lines, max_bytes)
end

.truncate_string_to_bytes_from_end(str, max_bytes) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 154

def truncate_string_to_bytes_from_end(str, max_bytes)
  bytes = str.dup.force_encoding("UTF-8").bytes
  return str if bytes.length <= max_bytes

  tail = bytes.last(max_bytes).pack("C*")
  until tail.valid_encoding?
    tail = tail.bytes.drop(1).pack("C*")
  end
  tail
end

.truncate_tail(content, max_lines: DEFAULT_MAX_LINES, max_bytes: DEFAULT_MAX_BYTES) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 92

def truncate_tail(content, max_lines: DEFAULT_MAX_LINES, max_bytes: DEFAULT_MAX_BYTES)
  lines = split_lines_for_counting(content)
  total_lines = lines.length
  total_bytes = content.bytesize

  if total_lines <= max_lines && total_bytes <= max_bytes
    return truncation_result(content, false, nil, total_lines, total_bytes, total_lines, total_bytes, false, false, max_lines, max_bytes)
  end

  out_lines = []
  out_bytes = 0
  truncated_by = "lines"
  last_line_partial = false

  (lines.length - 1).downto(0) do |i|
    break if out_lines.length >= max_lines

    line = lines[i]
    line_bytes = line.bytesize + (out_lines.empty? ? 0 : 1)

    if out_bytes + line_bytes > max_bytes
      truncated_by = "bytes"
      if out_lines.empty?
        out_lines.unshift(truncate_string_to_bytes_from_end(line, max_bytes))
        out_bytes = out_lines.first.bytesize
        last_line_partial = true
      end
      break
    end

    out_lines.unshift(line)
    out_bytes += line_bytes
  end

  output = out_lines.join("\n")
  truncation_result(output, true, truncated_by, total_lines, total_bytes, out_lines.length, output.bytesize, last_line_partial, false, max_lines, max_bytes)
end

.truncation_result(content, truncated, truncated_by, total_lines, total_bytes, output_lines, output_bytes, last_line_partial, first_line_exceeds_limit, max_lines, max_bytes) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 138

def truncation_result(content, truncated, truncated_by, total_lines, total_bytes, output_lines, output_bytes, last_line_partial, first_line_exceeds_limit, max_lines, max_bytes)
  {
    content: content,
    truncated: truncated,
    truncated_by: truncated_by,
    total_lines: total_lines,
    total_bytes: total_bytes,
    output_lines: output_lines,
    output_bytes: output_bytes,
    last_line_partial: last_line_partial,
    first_line_exceeds_limit: first_line_exceeds_limit,
    max_lines: max_lines,
    max_bytes: max_bytes
  }
end

.with_file_mutation_lock(path) ⇒ Object 



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# File 'lib/llm_gateway/agents/tools/tool_utils.rb', line 13

def with_file_mutation_lock(path)
  lock = @file_mutation_locks_mutex.synchronize { @file_mutation_locks[path] }
  lock.synchronize { yield }
end