Module: Wildling::Cli

Defined in:
lib/wildling/cli.rb

Defined Under Namespace

Classes: CliArgs

Class Method Summary collapse

Class Method Details

.apply_dictionary(result, name, value) ⇒ Object 



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# File 'lib/wildling/cli.rb', line 28

def apply_dictionary(result, name, value)
  if value.is_a?(Array)
    result.dictionaries[name] = value.map(&:to_s)
    return
  end
  return unless value.is_a?(String) && File.exist?(value)

  begin
    result.dictionaries[name] = load_dictionary_file(value)
  rescue SystemCallError
    # ignore unreadable dictionary files
  end
end

.apply_template(result, path) ⇒ Object 



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# File 'lib/wildling/cli.rb', line 42

def apply_template(result, path)
  unless File.exist?(path)
    warn "Template file not found: #{path}"
    exit 1
  end

  begin
    template = JSON.parse(File.read(path, encoding: "UTF-8"))
  rescue SystemCallError, JSON::ParserError
    warn "Invalid JSON template: #{path}"
    exit 1
  end

  unless template.is_a?(Hash)
    warn "Invalid JSON template: #{path}"
    exit 1
  end

  result.check = true if template["check"] == true

  select = template["select"]
  if select.is_a?(Array)
    select.each do |val|
      number = Integer(val)
      result.selects << number if number >= 0
    rescue ArgumentError, TypeError
      next
    end
  end

  ranges = template["range"]
  if ranges.is_a?(Array)
    ranges.each do |range_str|
      parsed = parse_range(range_str.to_s)
      result.ranges << parsed if parsed
    end
  end

  dictionaries = template["dictionaries"]
  if dictionaries.is_a?(Hash)
    dictionaries.each do |name, value|
      apply_dictionary(result, name.to_s, value) if value.is_a?(String) || value.is_a?(Array)
    end
  end

  patterns = template["patterns"]
  if patterns.is_a?(Array)
    patterns.each { |pattern| result.patterns << pattern.to_s }
  end
end

.format_check_output(args, total, generators) ⇒ Object 



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# File 'lib/wildling/cli.rb', line 174

def format_check_output(args, total, generators)
  lines = [
    "patterns:#{format_list(args.patterns)}",
    "dictionaries:#{format_list(args.dictionaries.keys)}",
    "select:#{format_list(args.selects)}",
    "range:#{format_list(args.ranges.map { |start, finish| "#{start}-#{finish}" })}",
    "total: #{total}"
  ]
  generators.each do |gen|
    lines << "generator: #{gen.source} #{gen.count}"
  end
  lines.join("\n")
end

.format_list(values) ⇒ Object 



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# File 'lib/wildling/cli.rb', line 170

def format_list(values)
  values.nil? || values.empty? ? "" : " #{values.map(&:to_s).join(' ')}"
end

.load_dictionary_file(path) ⇒ Object 



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# File 'lib/wildling/cli.rb', line 24

def load_dictionary_file(path)
  File.read(path, encoding: "UTF-8").split(/\r?\n/).map(&:strip).reject(&:empty?)
end

.load_help_text ⇒ Object 



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# File 'lib/wildling/cli.rb', line 158

def load_help_text
  here = File.expand_path(__dir__)
  candidates = [
    File.join(here, "help.txt"),
    File.join(here, "..", "..", "docs", "help.txt")
  ]
  candidates.each do |path|
    return File.read(path, encoding: "UTF-8") if File.exist?(path)
  end
  "wildling - pattern based string generator\n\nHelp text unavailable.\n"
end

.main(argv = nil) ⇒ Object 



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# File 'lib/wildling/cli.rb', line 188

def main(argv = nil)
  args = parse_args(argv || ARGV)

  if args.help
    puts load_help_text.rstrip
    exit 0
  end

  if args.version
    puts "wildling #{VERSION}"
    exit 0
  end

  if args.patterns.empty?
    warn "No pattern provided. Use --help for usage information."
    exit 1
  end

  wildcard = ::Wildling.create(args.patterns, args.dictionaries)

  if args.check
    puts format_check_output(args, wildcard.count, wildcard.generators)
    exit 0
  end

  if !args.selects.empty? || !args.ranges.empty?
    oor = false
    args.selects.each do |index|
      value = wildcard.get(index)
      if value == false
        $stderr.puts "out of range: #{index}"
        oor = true
      else
        puts value
      end
    end
    args.ranges.each do |start, finish|
      (start..finish).each do |index|
        value = wildcard.get(index)
        if value == false
          $stderr.puts "out of range: #{index}"
          oor = true
        else
          puts value
        end
      end
    end
    exit(oor ? 1 : 0)
  end

  value = wildcard.next
  while value != false
    puts value
    value = wildcard.next
  end
end

.parse_args(args) ⇒ Object 



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# File 'lib/wildling/cli.rb', line 93

def parse_args(args)
  result = CliArgs.new(
    selects: [],
    ranges: [],
    check: false,
    dictionaries: {},
    patterns: [],
    help: false,
    version: false
  )
  i = 0
  while i < args.length
    arg = args[i]

    case arg
    when "--help", "-h"
      result.help = true
      i += 1
    when "--version", "-v"
      result.version = true
      i += 1
    when "--check"
      result.check = true
      i += 1
    when "--select"
      i += 1
      break if i >= args.length

      begin
        val = Integer(args[i])
        result.selects << val if val >= 0
      rescue ArgumentError, TypeError
        # skip invalid select
      end
      i += 1
    when "--range"
      i += 1
      break if i >= args.length

      parsed = parse_range(args[i])
      result.ranges << parsed if parsed
      i += 1
    when "--dictionary"
      i += 1
      break if i >= args.length

      name, path = args[i].split(":", 2)
      apply_dictionary(result, name, path) if name && path && !name.empty? && !path.empty?
      i += 1
    when "--template"
      i += 1
      if i >= args.length
        warn "Missing path for --template"
        exit 1
      end
      apply_template(result, args[i])
      i += 1
    else
      result.patterns << arg
      i += 1
    end
  end
  result
end

.parse_range(value) ⇒ Object 



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# File 'lib/wildling/cli.rb', line 15

def parse_range(value)
  parts = value.split("-", 2)
  return nil if parts.length != 2 || !parts[0].match?(/\A\d+\z/) || !parts[1].match?(/\A\d+\z/)

  start = parts[0].to_i
  finish = parts[1].to_i
  start <= finish ? [start, finish] : nil
end