Class: Utils::Finder

Inherits:
Object show all
Includes:
Term::ANSIColor, Tins::Find, Patterns
Defined in:
lib/utils/finder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Patterns

#choose

Constructor Details

#initialize(opts = {}) ⇒ Finder

Returns a new instance of Finder.



16
17
18
19
20
21
22
23
24
25
26
27
 
# File 'lib/utils/finder.rb', line 16

def initialize(opts = {})
  @args  = opts[:args] || {}
  @roots = discover_roots(opts[:roots])
  @config = opts[:config] || Utils::ConfigFile.new
  pattern_opts = opts.subhash(:pattern) | {
    :cset  => @args[?a],
    :icase => @args[?i] != ?n,
  }
  @pattern = choose(@args[?p], pattern_opts)
  @paths  = []
  @args[?r] and reset_index
end

Instance Attribute Details

#output ⇒ Object (readonly)

Returns the value of attribute output.



31
32
33
 
# File 'lib/utils/finder.rb', line 31

def output
  @output
end

#paths ⇒ Object (readonly)

Returns the value of attribute paths.



29
30
31
 
# File 'lib/utils/finder.rb', line 29

def paths
  @paths
end

Instance Method Details

#build_paths ⇒ Object 



40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/utils/finder.rb', line 40

def build_paths
  paths = []
  visit = -> filename {
    s  = filename.stat
    bn = filename.pathname.basename
    if !s ||
        s.directory? && @config.discover.prune?(bn) ||
        s.file? && @config.discover.skip?(bn)
    then
      @args[?v] and warn "Pruning #{filename.inspect}."
      prune
    end
    true
  }
  find(*@roots, visit: visit) do |filename|
    filename.stat.directory? and filename << ?/
    paths << filename
  end
  paths.uniq!
  paths
end

#create_paths ⇒ Object 



71
72
73
74
75
76
77
 
# File 'lib/utils/finder.rb', line 71

def create_paths
  paths = build_paths
  File.secure_write(index_path) do |output|
    output.puts paths
  end
  paths
end

#index_path ⇒ Object 



62
63
64
65
66
67
68
69
 
# File 'lib/utils/finder.rb', line 62

def index_path
  roots = @roots.map { |r| File.expand_path(r) }.uniq.sort
  filename = "finder-paths-" +
    Digest::MD5.new.update(roots.inspect).hexdigest
  dirname = File.join(Dir.tmpdir, File.basename($0))
  FileUtils.mkdir_p dirname
  File.join(dirname, filename)
end

#load_paths ⇒ Object 



79
80
81
82
83
84
85
86
87
 
# File 'lib/utils/finder.rb', line 79

def load_paths
  lines = File.readlines(index_path)
  @args[?v] and warn "Loaded index #{index_path.inspect}."
  lines.empty? and raise Errno::ENOENT
  @args[?d] or lines = lines.grep_v(%r{/$})
  lines.map(&:chomp!)
rescue Errno::ENOENT
  return create_paths
end

#reset_index ⇒ Object 



89
90
91
92
93
 
# File 'lib/utils/finder.rb', line 89

def reset_index
  path = index_path
  @args[?v] and warn "Resetting index #{path.inspect}."
  FileUtils.rm_f path
end

#search ⇒ Object 



38
39
40
41
 
# File 'lib/utils/finder.rb', line 38

def search_index
  paths = load_paths
  search_paths(paths)
end

#search_directly ⇒ Object 



99
100
101
 
# File 'lib/utils/finder.rb', line 99

def search_directly
  search_paths build_paths
end

#search_index ⇒ Object 



33
34
35
36
 
# File 'lib/utils/finder.rb', line 33

def search_index
  paths = load_paths
  search_paths(paths)
end

#search_paths(paths) ⇒ Object 



103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
 
# File 'lib/utils/finder.rb', line 103

def search_paths(paths)
  suffixes = Array(@args[?I])
  suffixes.full? do |s|
    paths.select! { |path| s.include?(File.extname(path)[1..-1]) }
  end
  paths = paths.map! do |path|
    if match = @pattern.match(path)
      if FuzzyPattern === @pattern
        current = 0
        marked_path = ''
        score, e = path.size, nil
        for i in 1...match.size
          match[i] or next
          b = match.begin(i)
          e ||= b
          marked_path << path[current...b]
          marked_path << red(path[b, 1])
          score += (b - e) * (path.size - b)
          e = match.end(i)
          current = b + 1
        end
        marked_path << match.post_match
        [ score, path, marked_path ]
      else
        marked_path = path[0...match.begin(0)] <<
          red(path[match.begin(0)...match.end(0)]) <<
          path[match.end(0)..-1]
        [ 0, path, marked_path ]
      end
    end
  end
  paths.compact!
  @paths, @output = paths.sort.transpose.values_at(-2, -1)
  if n = @args[?n]&.to_i
    @paths = @paths.first(n)
    @output = @output.first(n)
  end
  self
end