Module: Twin::Scanner

Defined in:
lib/twin/scanner.rb

Class Method Summary collapse

Class Method Details

.build_job(r) ⇒ Object 



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# File 'lib/twin/scanner.rb', line 101

def build_job(r)
  path   = r["Path"].to_s
  source = r["Source"].to_s
  target = r["Target"].to_s
  return nil if path.empty? || source.empty? || target.empty?

  excludes = (r["Exclude"] || "").split(",").map(&:strip).reject(&:empty?)

  src_full = File.join(source, path)
  tgt_full = File.join(target, path)
  src_exists, src_mtime = stat(src_full)
  tgt_exists, tgt_mtime = stat(tgt_full)
  conflict = src_exists && tgt_exists && tgt_mtime && src_mtime && tgt_mtime > src_mtime

  Job.new(
    program:       r["Program"].to_s,
    path:          path,
    description:   r["Description"].to_s,
    active:        (r["Active"] || 0).to_i,
    excludes:      excludes,
    label:         r["Label"].to_s,
    source:        source,
    target:        target,
    cmd:           r["Cmd"].to_s,
    sync_file:     r["_note_file"].to_s,
    source_exists: src_exists,
    target_exists: tgt_exists,
    source_mtime:  src_mtime,
    target_mtime:  tgt_mtime,
    conflict:      !!conflict,
  )
end

.group(jobs) ⇒ Object 



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# File 'lib/twin/scanner.rb', line 96

def group(jobs)
  jobs.group_by { |j| [j.program, j.sync_file] }
      .map { |(name, _file), js| Program.new(name: name, jobs: js) }
end

.load_jobs(cfg, scan_path: nil) ⇒ Object 



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# File 'lib/twin/scanner.rb', line 54

def load_jobs(cfg, scan_path: nil)
  raise "grubber not found in PATH" unless system("command -v grubber > /dev/null 2>&1")

  dir = scan_path || cfg.sync_dir
  stdout, stderr, status = Open3.capture3(
    "grubber", "extract", dir, "-b", "--format", "json"
  )
  raise "grubber: #{stderr.force_encoding('UTF-8').strip}" unless status.success?

  begin
    records = JSON.parse(stdout.force_encoding("UTF-8"))
  rescue JSON::ParserError => e
    raise "grubber returned invalid JSON: #{e.message}"
  end
  records.filter_map { |r| build_job(r) }
end

.load_programs(cfg, file: nil, label: nil, show_all: false) ⇒ Object 



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# File 'lib/twin/scanner.rb', line 71

def load_programs(cfg, file: nil, label: nil, show_all: false)
  scan_path, name_filter = resolve_file_arg(cfg, file)
  jobs = load_jobs(cfg, scan_path: scan_path)
  jobs = jobs.select { |j| j.sync_file.include?(name_filter) } if name_filter
  jobs = jobs.select { |j| j.label == label }                   if label && !label.empty?
  jobs = jobs.select { |j| j.active == 1 }                     unless show_all
  group(jobs)
end

.resolve_file_arg(cfg, file) ⇒ Object

Returns [scan_path, name_filter] for a given file argument.

  • nil / empty → [nil, nil] scan sync_dir, no filter

  • path to a dir → [dir, nil] scan that dir, no filter

  • path to a file → [dirname, basename] scan parent dir, filter by filename

  • bare name (no /) → [nil, name] scan sync_dir, filter by name



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# File 'lib/twin/scanner.rb', line 85

def resolve_file_arg(cfg, file)
  return [nil, nil] if file.nil? || file.empty?
  if file.include?("/") || file == "." || file == ".."
    expanded = File.expand_path(file)
    return [expanded, nil]                             if File.directory?(expanded)
    return [File.dirname(expanded), File.basename(expanded)] if File.file?(expanded)
    raise "not found: #{file}"
  end
  [nil, file]
end

.stat(path) ⇒ Object 



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# File 'lib/twin/scanner.rb', line 134

def stat(path)
  st = File.stat(path)
  [true, st.mtime]
rescue Errno::ENOENT, Errno::EACCES
  [false, nil]
end